diff --git a/.babelrc b/.babelrc deleted file mode 100644 index 272e041..0000000 --- a/.babelrc +++ /dev/null @@ -1,11 +0,0 @@ -{ - "presets": [ - ["env", { - "loose": true, - "targets": { - "browsers": false, - "node": 4 - } - }] - ] -} diff --git a/.eslintrc.json b/.eslintrc.json new file mode 100644 index 0000000..defb3a1 --- /dev/null +++ b/.eslintrc.json @@ -0,0 +1,8 @@ +{ + "env": { + "node": true, + "es6": true, + "mocha": true + }, + "extends": ["plugin:prettier/recommended"] +} diff --git a/.huskyrc.json b/.huskyrc.json new file mode 100644 index 0000000..5090235 --- /dev/null +++ b/.huskyrc.json @@ -0,0 +1,5 @@ +{ + "hooks": { + "pre-commit": "lint-staged" + } +} diff --git a/.lintstagedrc.json b/.lintstagedrc.json new file mode 100644 index 0000000..abf245e --- /dev/null +++ b/.lintstagedrc.json @@ -0,0 +1,3 @@ +{ + "*.{js,json,md,yml,yaml}": ["prettier-eslint --write", "git add"] +} diff --git a/.prettierrc.json b/.prettierrc.json new file mode 100644 index 0000000..a6765af --- /dev/null +++ b/.prettierrc.json @@ -0,0 +1,5 @@ +{ + "singleQuote": true, + "tabWidth": 4, + "trailingComma": "es5" +} diff --git a/.travis.yml b/.travis.yml index da07cc5..09e8291 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,6 +1,6 @@ sudo: false language: node_js node_js: - - "9" - - "8" - - "6" + - '9' + - '8' + - '6' diff --git a/README.md b/README.md index e17b72b..a9d689d 100644 --- a/README.md +++ b/README.md @@ -16,12 +16,16 @@ if (!policy.storable()) { // Cache the data AND the policy object in your cache // (this is pseudocode, roll your own cache (lru-cache package works)) -letsPretendThisIsSomeCache.set(request.url, {policy, response}, policy.timeToLive()); +letsPretendThisIsSomeCache.set( + request.url, + { policy, response }, + policy.timeToLive() +); ``` ```js // And later, when you receive a new request: -const {policy, response} = letsPretendThisIsSomeCache.get(newRequest.url); +const { policy, response } = letsPretendThisIsSomeCache.get(newRequest.url); // It's not enough that it exists in the cache, it has to match the new request, too: if (policy && policy.satisfiesWithoutRevalidation(newRequest)) { @@ -59,7 +63,7 @@ const response = { const options = { shared: true, cacheHeuristic: 0.1, - immutableMinTimeToLive: 24*3600*1000, // 24h + immutableMinTimeToLive: 24 * 3600 * 1000, // 24h ignoreCargoCult: false, trustServerDate: true, }; @@ -67,7 +71,7 @@ const options = { If `options.shared` is `true` (default), then the response is evaluated from a perspective of a shared cache (i.e. `private` is not cacheable and `s-maxage` is respected). If `options.shared` is `false`, then the response is evaluated from a perspective of a single-user cache (i.e. `private` is cacheable and `s-maxage` is ignored). `shared: true` is recommended for HTTP clients. -`options.cacheHeuristic` is a fraction of response's age that is used as a fallback cache duration. The default is 0.1 (10%), e.g. if a file hasn't been modified for 100 days, it'll be cached for 100*0.1 = 10 days. +`options.cacheHeuristic` is a fraction of response's age that is used as a fallback cache duration. The default is 0.1 (10%), e.g. if a file hasn't been modified for 100 days, it'll be cached for 100\*0.1 = 10 days. `options.immutableMinTimeToLive` is a number of milliseconds to assume as the default time to cache responses with `Cache-Control: immutable`. Note that [per RFC](http://httpwg.org/http-extensions/immutable.html) these can become stale, so `max-age` still overrides the default. @@ -97,7 +101,7 @@ cachedResponse.headers = cachePolicy.responseHeaders(cachedResponse); ### `timeToLive()` -Returns approximate time in *milliseconds* until the response becomes stale (i.e. not fresh). +Returns approximate time in _milliseconds_ until the response becomes stale (i.e. not fresh). After that time (when `timeToLive() <= 0`) the response might not be usable without revalidation. However, there are exceptions, e.g. a client can explicitly allow stale responses, so always check with `satisfiesWithoutRevalidation()`. @@ -125,14 +129,16 @@ updateRequest.headers = cachePolicy.revalidationHeaders(updateRequest); Use this method to update the cache after receiving a new response from the origin server. It returns an object with two keys: -* `policy` — A new `CachePolicy` with HTTP headers updated from `revalidationResponse`. You can always replace the old cached `CachePolicy` with the new one. -* `modified` — Boolean indicating whether the response body has changed. - * If `false`, then a valid 304 Not Modified response has been received, and you can reuse the old cached response body. - * If `true`, you should use new response's body (if present), or make another request to the origin server without any conditional headers (i.e. don't use `revalidationHeaders()` this time) to get the new resource. +- `policy` — A new `CachePolicy` with HTTP headers updated from `revalidationResponse`. You can always replace the old cached `CachePolicy` with the new one. +- `modified` — Boolean indicating whether the response body has changed. + - If `false`, then a valid 304 Not Modified response has been received, and you can reuse the old cached response body. + - If `true`, you should use new response's body (if present), or make another request to the origin server without any conditional headers (i.e. don't use `revalidationHeaders()` this time) to get the new resource. ```js // When serving requests from cache: -const {oldPolicy, oldResponse} = letsPretendThisIsSomeCache.get(newRequest.url); +const { oldPolicy, oldResponse } = letsPretendThisIsSomeCache.get( + newRequest.url +); if (!oldPolicy.satisfiesWithoutRevalidation(newRequest)) { // Change the request to ask the origin server if the cached response can be used @@ -142,11 +148,18 @@ if (!oldPolicy.satisfiesWithoutRevalidation(newRequest)) { const newResponse = await makeRequest(newResponse); // Create updated policy and combined response from the old and new data - const {policy, modified} = oldPolicy.revalidatedPolicy(newRequest, newResponse); + const { policy, modified } = oldPolicy.revalidatedPolicy( + newRequest, + newResponse + ); const response = modified ? newResponse : oldResponse; // Update the cache with the newer/fresher response - letsPretendThisIsSomeCache.set(newRequest.url, {policy, response}, policy.timeToLive()); + letsPretendThisIsSomeCache.set( + newRequest.url, + { policy, response }, + policy.timeToLive() + ); // And proceed returning cached response as usual response.headers = policy.responseHeaders(); @@ -160,21 +173,21 @@ if (!oldPolicy.satisfiesWithoutRevalidation(newRequest)) { ## Used by -* [ImageOptim API](https://imageoptim.com/api), [make-fetch-happen](https://github.com/zkat/make-fetch-happen), [cacheable-request](https://www.npmjs.com/package/cacheable-request) ([got](https://www.npmjs.com/package/got)), [npm/registry-fetch](https://github.com/npm/registry-fetch), [etc.](https://github.com/kornelski/http-cache-semantics/network/dependents) +- [ImageOptim API](https://imageoptim.com/api), [make-fetch-happen](https://github.com/zkat/make-fetch-happen), [cacheable-request](https://www.npmjs.com/package/cacheable-request) ([got](https://www.npmjs.com/package/got)), [npm/registry-fetch](https://github.com/npm/registry-fetch), [etc.](https://github.com/kornelski/http-cache-semantics/network/dependents) ## Implemented -* `Cache-Control` response header with all the quirks. -* `Expires` with check for bad clocks. -* `Pragma` response header. -* `Age` response header. -* `Vary` response header. -* Default cacheability of statuses and methods. -* Requests for stale data. -* Filtering of hop-by-hop headers. -* Basic revalidation request +- `Cache-Control` response header with all the quirks. +- `Expires` with check for bad clocks. +- `Pragma` response header. +- `Age` response header. +- `Vary` response header. +- Default cacheability of statuses and methods. +- Requests for stale data. +- Filtering of hop-by-hop headers. +- Basic revalidation request ## Unimplemented -* Merging of range requests, If-Range (but correctly supports them as non-cacheable) -* Revalidation of multiple representations +- Merging of range requests, If-Range (but correctly supports them as non-cacheable) +- Revalidation of multiple representations diff --git a/index.js b/index.js index 47981ad..bee995a 100644 --- a/index.js +++ b/index.js @@ -1,17 +1,53 @@ 'use strict'; // rfc7231 6.1 -const statusCodeCacheableByDefault = [200, 203, 204, 206, 300, 301, 404, 405, 410, 414, 501]; +const statusCodeCacheableByDefault = [ + 200, + 203, + 204, + 206, + 300, + 301, + 404, + 405, + 410, + 414, + 501, +]; // This implementation does not understand partial responses (206) -const understoodStatuses = [200, 203, 204, 300, 301, 302, 303, 307, 308, 404, 405, 410, 414, 501]; +const understoodStatuses = [ + 200, + 203, + 204, + 300, + 301, + 302, + 303, + 307, + 308, + 404, + 405, + 410, + 414, + 501, +]; const hopByHopHeaders = { - 'date': true, // included, because we add Age update Date - 'connection':true, 'keep-alive':true, 'proxy-authenticate':true, 'proxy-authorization':true, 'te':true, 'trailer':true, 'transfer-encoding':true, 'upgrade':true + date: true, // included, because we add Age update Date + connection: true, + 'keep-alive': true, + 'proxy-authenticate': true, + 'proxy-authorization': true, + te: true, + trailer: true, + 'transfer-encoding': true, + upgrade: true, }; const excludedFromRevalidationUpdate = { // Since the old body is reused, it doesn't make sense to change properties of the body - 'content-length': true, 'content-encoding': true, 'transfer-encoding': true, + 'content-length': true, + 'content-encoding': true, + 'transfer-encoding': true, 'content-range': true, }; @@ -22,9 +58,9 @@ function parseCacheControl(header) { // TODO: When there is more than one value present for a given directive (e.g., two Expires header fields, multiple Cache-Control: max-age directives), // the directive's value is considered invalid. Caches are encouraged to consider responses that have invalid freshness information to be stale const parts = header.trim().split(/\s*,\s*/); // TODO: lame parsing - for(const part of parts) { - const [k,v] = part.split(/\s*=\s*/, 2); - cc[k] = (v === undefined) ? true : v.replace(/^"|"$/g, ''); // TODO: lame unquoting + for (const part of parts) { + const [k, v] = part.split(/\s*=\s*/, 2); + cc[k] = v === undefined ? true : v.replace(/^"|"$/g, ''); // TODO: lame unquoting } return cc; @@ -32,7 +68,7 @@ function parseCacheControl(header) { function formatCacheControl(cc) { let parts = []; - for(const k in cc) { + for (const k in cc) { const v = cc[k]; parts.push(v === true ? k : k + '=' + v); } @@ -43,22 +79,38 @@ function formatCacheControl(cc) { } module.exports = class CachePolicy { - constructor(req, res, {shared, cacheHeuristic, immutableMinTimeToLive, ignoreCargoCult, trustServerDate, _fromObject} = {}) { + constructor( + req, + res, + { + shared, + cacheHeuristic, + immutableMinTimeToLive, + ignoreCargoCult, + trustServerDate, + _fromObject, + } = {} + ) { if (_fromObject) { this._fromObject(_fromObject); return; } if (!res || !res.headers) { - throw Error("Response headers missing"); + throw Error('Response headers missing'); } this._assertRequestHasHeaders(req); this._responseTime = this.now(); this._isShared = shared !== false; - this._trustServerDate = undefined !== trustServerDate ? trustServerDate : true; - this._cacheHeuristic = undefined !== cacheHeuristic ? cacheHeuristic : 0.1; // 10% matches IE - this._immutableMinTtl = undefined !== immutableMinTimeToLive ? immutableMinTimeToLive : 24*3600*1000; + this._trustServerDate = + undefined !== trustServerDate ? trustServerDate : true; + this._cacheHeuristic = + undefined !== cacheHeuristic ? cacheHeuristic : 0.1; // 10% matches IE + this._immutableMinTtl = + undefined !== immutableMinTimeToLive + ? immutableMinTimeToLive + : 24 * 3600 * 1000; this._status = 'status' in res ? res.status : 200; this._resHeaders = res.headers; @@ -72,20 +124,29 @@ module.exports = class CachePolicy { // Assume that if someone uses legacy, non-standard uncecessary options they don't understand caching, // so there's no point stricly adhering to the blindly copy&pasted directives. - if (ignoreCargoCult && "pre-check" in this._rescc && "post-check" in this._rescc) { + if ( + ignoreCargoCult && + 'pre-check' in this._rescc && + 'post-check' in this._rescc + ) { delete this._rescc['pre-check']; delete this._rescc['post-check']; delete this._rescc['no-cache']; delete this._rescc['no-store']; delete this._rescc['must-revalidate']; - this._resHeaders = Object.assign({}, this._resHeaders, {'cache-control': formatCacheControl(this._rescc)}); + this._resHeaders = Object.assign({}, this._resHeaders, { + 'cache-control': formatCacheControl(this._rescc), + }); delete this._resHeaders.expires; delete this._resHeaders.pragma; } // When the Cache-Control header field is not present in a request, caches MUST consider the no-cache request pragma-directive // as having the same effect as if "Cache-Control: no-cache" were present (see Section 5.2.1). - if (!res.headers['cache-control'] && /no-cache/.test(res.headers.pragma)) { + if ( + !res.headers['cache-control'] && + /no-cache/.test(res.headers.pragma) + ) { this._rescc['no-cache'] = true; } } @@ -96,10 +157,13 @@ module.exports = class CachePolicy { storable() { // The "no-store" request directive indicates that a cache MUST NOT store any part of either this request or any response to it. - return !!(!this._reqcc['no-store'] && + return !!( + !this._reqcc['no-store'] && // A cache MUST NOT store a response to any request, unless: // The request method is understood by the cache and defined as being cacheable, and - ('GET' === this._method || 'HEAD' === this._method || ('POST' === this._method && this._hasExplicitExpiration())) && + ('GET' === this._method || + 'HEAD' === this._method || + ('POST' === this._method && this._hasExplicitExpiration())) && // the response status code is understood by the cache, and understoodStatuses.indexOf(this._status) !== -1 && // the "no-store" cache directive does not appear in request or response header fields, and @@ -107,30 +171,35 @@ module.exports = class CachePolicy { // the "private" response directive does not appear in the response, if the cache is shared, and (!this._isShared || !this._rescc.private) && // the Authorization header field does not appear in the request, if the cache is shared, - (!this._isShared || this._noAuthorization || this._allowsStoringAuthenticated()) && + (!this._isShared || + this._noAuthorization || + this._allowsStoringAuthenticated()) && // the response either: - ( - // contains an Expires header field, or - this._resHeaders.expires || + // contains an Expires header field, or + (this._resHeaders.expires || // contains a max-age response directive, or // contains a s-maxage response directive and the cache is shared, or // contains a public response directive. - this._rescc.public || this._rescc['max-age'] || this._rescc['s-maxage'] || + this._rescc.public || + this._rescc['max-age'] || + this._rescc['s-maxage'] || // has a status code that is defined as cacheable by default - statusCodeCacheableByDefault.indexOf(this._status) !== -1 - )); + statusCodeCacheableByDefault.indexOf(this._status) !== -1) + ); } _hasExplicitExpiration() { // 4.2.1 Calculating Freshness Lifetime - return (this._isShared && this._rescc['s-maxage']) || + return ( + (this._isShared && this._rescc['s-maxage']) || this._rescc['max-age'] || - this._resHeaders.expires; + this._resHeaders.expires + ); } _assertRequestHasHeaders(req) { if (!req || !req.headers) { - throw Error("Request headers missing"); + throw Error('Request headers missing'); } } @@ -149,14 +218,21 @@ module.exports = class CachePolicy { return false; } - if (requestCC['min-fresh'] && this.timeToLive() < 1000*requestCC['min-fresh']) { + if ( + requestCC['min-fresh'] && + this.timeToLive() < 1000 * requestCC['min-fresh'] + ) { return false; } // the stored response is either: // fresh, or allowed to be served stale if (this.stale()) { - const allowsStale = requestCC['max-stale'] && !this._rescc['must-revalidate'] && (true === requestCC['max-stale'] || requestCC['max-stale'] > this.age() - this.maxAge()); + const allowsStale = + requestCC['max-stale'] && + !this._rescc['must-revalidate'] && + (true === requestCC['max-stale'] || + requestCC['max-stale'] > this.age() - this.maxAge()); if (!allowsStale) { return false; } @@ -167,17 +243,25 @@ module.exports = class CachePolicy { _requestMatches(req, allowHeadMethod) { // The presented effective request URI and that of the stored response match, and - return (!this._url || this._url === req.url) && - (this._host === req.headers.host) && + return ( + (!this._url || this._url === req.url) && + this._host === req.headers.host && // the request method associated with the stored response allows it to be used for the presented request, and - (!req.method || this._method === req.method || (allowHeadMethod && 'HEAD' === req.method)) && + (!req.method || + this._method === req.method || + (allowHeadMethod && 'HEAD' === req.method)) && // selecting header fields nominated by the stored response (if any) match those presented, and - this._varyMatches(req); + this._varyMatches(req) + ); } _allowsStoringAuthenticated() { // following Cache-Control response directives (Section 5.2.2) have such an effect: must-revalidate, public, and s-maxage. - return this._rescc['must-revalidate'] || this._rescc.public || this._rescc['s-maxage']; + return ( + this._rescc['must-revalidate'] || + this._rescc.public || + this._rescc['s-maxage'] + ); } _varyMatches(req) { @@ -190,8 +274,11 @@ module.exports = class CachePolicy { return false; } - const fields = this._resHeaders.vary.trim().toLowerCase().split(/\s*,\s*/); - for(const name of fields) { + const fields = this._resHeaders.vary + .trim() + .toLowerCase() + .split(/\s*,\s*/); + for (const name of fields) { if (req.headers[name] !== this._reqHeaders[name]) return false; } return true; @@ -199,14 +286,14 @@ module.exports = class CachePolicy { _copyWithoutHopByHopHeaders(inHeaders) { const headers = {}; - for(const name in inHeaders) { + for (const name in inHeaders) { if (hopByHopHeaders[name]) continue; headers[name] = inHeaders[name]; } // 9.1. Connection if (inHeaders.connection) { const tokens = inHeaders.connection.trim().split(/\s*,\s*/); - for(const name of tokens) { + for (const name of tokens) { delete headers[name]; } } @@ -229,8 +316,14 @@ module.exports = class CachePolicy { // A cache SHOULD generate 113 warning if it heuristically chose a freshness // lifetime greater than 24 hours and the response's age is greater than 24 hours. - if (age > 3600*24 && !this._hasExplicitExpiration() && this.maxAge() > 3600*24) { - headers.warning = (headers.warning ? `${headers.warning}, ` : '') + '113 - "rfc7234 5.5.4"'; + if ( + age > 3600 * 24 && + !this._hasExplicitExpiration() && + this.maxAge() > 3600 * 24 + ) { + headers.warning = + (headers.warning ? `${headers.warning}, ` : '') + + '113 - "rfc7234 5.5.4"'; } headers.age = `${Math.round(age)}`; headers.date = new Date(this.now()).toUTCString(); @@ -249,9 +342,9 @@ module.exports = class CachePolicy { } _serverDate() { - const dateValue = Date.parse(this._resHeaders.date) + const dateValue = Date.parse(this._resHeaders.date); if (isFinite(dateValue)) { - const maxClockDrift = 8*3600*1000; + const maxClockDrift = 8 * 3600 * 1000; const clockDrift = Math.abs(this._responseTime - dateValue); if (clockDrift < maxClockDrift) { return dateValue; @@ -267,13 +360,13 @@ module.exports = class CachePolicy { * @return Number */ age() { - let age = Math.max(0, (this._responseTime - this.date())/1000); + let age = Math.max(0, (this._responseTime - this.date()) / 1000); if (this._resHeaders.age) { let ageValue = this._ageValue(); if (ageValue > age) age = ageValue; } - const residentTime = (this.now() - this._responseTime)/1000; + const residentTime = (this.now() - this._responseTime) / 1000; return age + residentTime; } @@ -296,7 +389,12 @@ module.exports = class CachePolicy { // Shared responses with cookies are cacheable according to the RFC, but IMHO it'd be unwise to do so by default // so this implementation requires explicit opt-in via public header - if (this._isShared && (this._resHeaders['set-cookie'] && !this._rescc.public && !this._rescc.immutable)) { + if ( + this._isShared && + (this._resHeaders['set-cookie'] && + !this._rescc.public && + !this._rescc.immutable) + ) { return 0; } @@ -328,13 +426,16 @@ module.exports = class CachePolicy { if (Number.isNaN(expires) || expires < dateValue) { return 0; } - return Math.max(defaultMinTtl, (expires - dateValue)/1000); + return Math.max(defaultMinTtl, (expires - dateValue) / 1000); } if (this._resHeaders['last-modified']) { const lastModified = Date.parse(this._resHeaders['last-modified']); if (isFinite(lastModified) && dateValue > lastModified) { - return Math.max(defaultMinTtl, (dateValue - lastModified)/1000 * this._cacheHeuristic); + return Math.max( + defaultMinTtl, + ((dateValue - lastModified) / 1000) * this._cacheHeuristic + ); } } @@ -342,7 +443,7 @@ module.exports = class CachePolicy { } timeToLive() { - return Math.max(0, this.maxAge() - this.age())*1000; + return Math.max(0, this.maxAge() - this.age()) * 1000; } stale() { @@ -350,17 +451,18 @@ module.exports = class CachePolicy { } static fromObject(obj) { - return new this(undefined, undefined, {_fromObject:obj}); + return new this(undefined, undefined, { _fromObject: obj }); } _fromObject(obj) { - if (this._responseTime) throw Error("Reinitialized"); - if (!obj || obj.v !== 1) throw Error("Invalid serialization"); + if (this._responseTime) throw Error('Reinitialized'); + if (!obj || obj.v !== 1) throw Error('Invalid serialization'); this._responseTime = obj.t; this._isShared = obj.sh; this._cacheHeuristic = obj.ch; - this._immutableMinTtl = obj.imm !== undefined ? obj.imm : 24*3600*1000; + this._immutableMinTtl = + obj.imm !== undefined ? obj.imm : 24 * 3600 * 1000; this._status = obj.st; this._resHeaders = obj.resh; this._rescc = obj.rescc; @@ -374,7 +476,7 @@ module.exports = class CachePolicy { toObject() { return { - v:1, + v: 1, t: this._responseTime, sh: this._isShared, ch: this._cacheHeuristic, @@ -405,7 +507,8 @@ module.exports = class CachePolicy { // This implementation does not understand range requests delete headers['if-range']; - if (!this._requestMatches(incomingReq, true) || !this.storable()) { // revalidation allowed via HEAD + if (!this._requestMatches(incomingReq, true) || !this.storable()) { + // revalidation allowed via HEAD // not for the same resource, or wasn't allowed to be cached anyway delete headers['if-none-match']; delete headers['if-modified-since']; @@ -414,11 +517,17 @@ module.exports = class CachePolicy { /* MUST send that entity-tag in any cache validation request (using If-Match or If-None-Match) if an entity-tag has been provided by the origin server. */ if (this._resHeaders.etag) { - headers['if-none-match'] = headers['if-none-match'] ? `${headers['if-none-match']}, ${this._resHeaders.etag}` : this._resHeaders.etag; + headers['if-none-match'] = headers['if-none-match'] + ? `${headers['if-none-match']}, ${this._resHeaders.etag}` + : this._resHeaders.etag; } // Clients MAY issue simple (non-subrange) GET requests with either weak validators or strong validators. Clients MUST NOT use weak validators in other forms of request. - const forbidsWeakValidators = headers['accept-ranges'] || headers['if-match'] || headers['if-unmodified-since'] || (this._method && this._method != 'GET'); + const forbidsWeakValidators = + headers['accept-ranges'] || + headers['if-match'] || + headers['if-unmodified-since'] || + (this._method && this._method != 'GET'); /* SHOULD send the Last-Modified value in non-subrange cache validation requests (using If-Modified-Since) if only a Last-Modified value has been provided by the origin server. Note: This implementation does not understand partial responses (206) */ @@ -426,16 +535,21 @@ module.exports = class CachePolicy { delete headers['if-modified-since']; if (headers['if-none-match']) { - const etags = headers['if-none-match'].split(/,/).filter(etag => { - return !/^\s*W\//.test(etag); - }); + const etags = headers['if-none-match'] + .split(/,/) + .filter(etag => { + return !/^\s*W\//.test(etag); + }); if (!etags.length) { delete headers['if-none-match']; } else { headers['if-none-match'] = etags.join(',').trim(); } } - } else if (this._resHeaders['last-modified'] && !headers['if-modified-since']) { + } else if ( + this._resHeaders['last-modified'] && + !headers['if-modified-since'] + ) { headers['if-modified-since'] = this._resHeaders['last-modified']; } @@ -454,7 +568,7 @@ module.exports = class CachePolicy { revalidatedPolicy(request, response) { this._assertRequestHasHeaders(request); if (!response || !response.headers) { - throw Error("Response headers missing"); + throw Error('Response headers missing'); } // These aren't going to be supported exactly, since one CachePolicy object @@ -462,25 +576,39 @@ module.exports = class CachePolicy { let matches = false; if (response.status !== undefined && response.status != 304) { matches = false; - } else if (response.headers.etag && !/^\s*W\//.test(response.headers.etag)) { + } else if ( + response.headers.etag && + !/^\s*W\//.test(response.headers.etag) + ) { // "All of the stored responses with the same strong validator are selected. // If none of the stored responses contain the same strong validator, // then the cache MUST NOT use the new response to update any stored responses." - matches = this._resHeaders.etag && this._resHeaders.etag.replace(/^\s*W\//,'') === response.headers.etag; + matches = + this._resHeaders.etag && + this._resHeaders.etag.replace(/^\s*W\//, '') === + response.headers.etag; } else if (this._resHeaders.etag && response.headers.etag) { // "If the new response contains a weak validator and that validator corresponds // to one of the cache's stored responses, // then the most recent of those matching stored responses is selected for update." - matches = this._resHeaders.etag.replace(/^\s*W\//,'') === response.headers.etag.replace(/^\s*W\//,''); + matches = + this._resHeaders.etag.replace(/^\s*W\//, '') === + response.headers.etag.replace(/^\s*W\//, ''); } else if (this._resHeaders['last-modified']) { - matches = this._resHeaders['last-modified'] === response.headers['last-modified']; + matches = + this._resHeaders['last-modified'] === + response.headers['last-modified']; } else { // If the new response does not include any form of validator (such as in the case where // a client generates an If-Modified-Since request from a source other than the Last-Modified // response header field), and there is only one stored response, and that stored response also // lacks a validator, then that stored response is selected for update. - if (!this._resHeaders.etag && !this._resHeaders['last-modified'] && - !response.headers.etag && !response.headers['last-modified']) { + if ( + !this._resHeaders.etag && + !this._resHeaders['last-modified'] && + !response.headers.etag && + !response.headers['last-modified'] + ) { matches = true; } } @@ -493,14 +621,17 @@ module.exports = class CachePolicy { // error recovery in such case. modified: response.status != 304, matches: false, - } + }; } // use other header fields provided in the 304 (Not Modified) response to replace all instances // of the corresponding header fields in the stored response. const headers = {}; - for(const k in this._resHeaders) { - headers[k] = k in response.headers && !excludedFromRevalidationUpdate[k] ? response.headers[k] : this._resHeaders[k]; + for (const k in this._resHeaders) { + headers[k] = + k in response.headers && !excludedFromRevalidationUpdate[k] + ? response.headers[k] + : this._resHeaders[k]; } const newResponse = Object.assign({}, response, { @@ -509,7 +640,12 @@ module.exports = class CachePolicy { headers, }); return { - policy: new this.constructor(request, newResponse, {shared: this._isShared, cacheHeuristic: this._cacheHeuristic, immutableMinTimeToLive: this._immutableMinTtl, trustServerDate: this._trustServerDate}), + policy: new this.constructor(request, newResponse, { + shared: this._isShared, + cacheHeuristic: this._cacheHeuristic, + immutableMinTimeToLive: this._immutableMinTtl, + trustServerDate: this._trustServerDate, + }), modified: false, matches: true, }; diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..b7ee666 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,4223 @@ +{ + "name": "http-cache-semantics", + "version": "4.0.2", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "@babel/code-frame": { + "version": "7.0.0", + "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0.tgz", + "integrity": 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Helps building correct HTTP caches and proxies", - "repository": "https://github.com/kornelski/http-cache-semantics.git", - "main": "index.js", - "scripts": { - "test": "mocha" - }, - "files": [ - "index.js" - ], - "author": "Kornel Lesiński (https://kornel.ski/)", - "license": "BSD-2-Clause", - "devDependencies": { - "mocha": "^5.1.0" - } + "name": "http-cache-semantics", + "version": "4.0.2", + "description": "Parses Cache-Control and other headers. Helps building correct HTTP caches and proxies", + "repository": "https://github.com/kornelski/http-cache-semantics.git", + "main": "index.js", + "scripts": { + "test": "mocha" + }, + "files": [ + "index.js" + ], + "author": "Kornel Lesiński (https://kornel.ski/)", + "license": "BSD-2-Clause", + "devDependencies": { + "eslint": "^5.13.0", + "eslint-plugin-prettier": "^3.0.1", + "husky": "^0.14.3", + "lint-staged": "^8.1.3", + "mocha": "^5.1.0", + "prettier": "^1.14.3", + "prettier-eslint-cli": "^4.7.1" + } } diff --git a/test/misctest.js b/test/misctest.js index 27b7bfb..7333422 100644 --- a/test/misctest.js +++ b/test/misctest.js @@ -3,7 +3,6 @@ const assert = require('assert'); const CachePolicy = require('..'); - describe('Other', function() { it('Thaw wrong object', function() { assert.throws(() => { @@ -16,10 +15,10 @@ describe('Other', function() { new CachePolicy({}); }); assert.throws(() => { - new CachePolicy({headers:{}}, {}); + new CachePolicy({ headers: {} }, {}); }); - const cache = new CachePolicy({headers:{}}, {headers:{}}); + const cache = new CachePolicy({ headers: {} }, { headers: {} }); assert.throws(() => { cache.satisfiesWithoutRevalidation({}); }); @@ -27,7 +26,7 @@ describe('Other', function() { cache.revalidatedPolicy({}); }); assert.throws(() => { - cache.revalidatedPolicy({headers:{}}, {}); + cache.revalidatedPolicy({ headers: {} }, {}); }); }); @@ -35,7 +34,7 @@ describe('Other', function() { const res = { headers: { server: 'GitHub.com', - date: new Date(Date.now()-77*1000).toUTCString(), + date: new Date(Date.now() - 77 * 1000).toUTCString(), 'content-type': 'application/json; charset=utf-8', 'transfer-encoding': 'chunked', connection: 'close', @@ -46,26 +45,31 @@ describe('Other', function() { 'cache-control': 'private, max-age=60, s-maxage=60', vary: 'Accept, Authorization, Cookie, X-GitHub-OTP', etag: 'W/"4876f954d40e3efc6d32aab08b9bdc47"', - 'x-oauth-scopes': 'public_repo, read:user, repo:invite, repo:status, repo_deployment', + 'x-oauth-scopes': + 'public_repo, read:user, repo:invite, repo:status, repo_deployment', 'x-accepted-oauth-scopes': '', 'x-github-media-type': 'github.v3', - link: '; rel="next", ; rel="last"', - 'access-control-expose-headers': 'ETag, Link, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval', + link: + '; rel="next", ; rel="last"', + 'access-control-expose-headers': + 'ETag, Link, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval', 'access-control-allow-origin': '*', - 'strict-transport-security': 'max-age=31536000; includeSubdomains; preload', + 'strict-transport-security': + 'max-age=31536000; includeSubdomains; preload', 'x-frame-options': 'deny', 'x-content-type-options': 'nosniff', 'x-xss-protection': '1; mode=block', - 'referrer-policy': 'origin-when-cross-origin, strict-origin-when-cross-origin', - 'content-security-policy': 'default-src \'none\'', + 'referrer-policy': + 'origin-when-cross-origin, strict-origin-when-cross-origin', + 'content-security-policy': "default-src 'none'", 'x-runtime-rack': '0.051653', 'content-encoding': 'gzip', - 'x-github-request-id': 'C6EE:12E7:3E6CA0D:87F0004:5ADB2B35' - } + 'x-github-request-id': 'C6EE:12E7:3E6CA0D:87F0004:5ADB2B35', + }, }; const req = { - headers: {} + headers: {}, }; const c = new CachePolicy(req, res, { @@ -73,5 +77,5 @@ describe('Other', function() { trustServerDate: false, }); assert(c.satisfiesWithoutRevalidation(req)); - }) + }); }); diff --git a/test/okhttptest.js b/test/okhttptest.js index 315f114..46f59db 100644 --- a/test/okhttptest.js +++ b/test/okhttptest.js @@ -18,284 +18,405 @@ const assert = require('assert'); const CachePolicy = require('..'); -describe('okhttp tests', function(){ - it('responseCachingByResponseCode', function(){ - // Test each documented HTTP/1.1 code, plus the first unused value in each range. - // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html - - assertCached(false, 100); - assertCached(false, 101); - assertCached(false, 102); - assertCached(true, 200); - assertCached(false, 201); - assertCached(false, 202); - assertCached(true, 203); - assertCached(true, 204); - assertCached(false, 205); - assertCached(false, 206); //Electing to not cache partial responses - assertCached(false, 207); - assertCached(true, 300); - assertCached(true, 301); - assertCached(true, 302); - // assertCached(false, 303); - assertCached(false, 304); - assertCached(false, 305); - assertCached(false, 306); - assertCached(true, 307); - assertCached(true, 308); - assertCached(false, 400); - assertCached(false, 401); - assertCached(false, 402); - assertCached(false, 403); - assertCached(true, 404); - assertCached(true, 405); - assertCached(false, 406); - assertCached(false, 408); - assertCached(false, 409); - // the HTTP spec permits caching 410s, but the RI doesn't. - assertCached(true, 410); - assertCached(false, 411); - assertCached(false, 412); - assertCached(false, 413); - assertCached(true, 414); - assertCached(false, 415); - assertCached(false, 416); - assertCached(false, 417); - assertCached(false, 418); - assertCached(false, 429); - - assertCached(false, 500); - assertCached(true, 501); - assertCached(false, 502); - assertCached(false, 503); - assertCached(false, 504); - assertCached(false, 505); - assertCached(false, 506); - }); - - function assertCached(shouldPut, responseCode) { - let expectedResponseCode = responseCode; - - const mockResponse = {headers:{ - "last-modified": formatDate(-1, 3600), - "expires": formatDate(1, 3600), - "www-authenticate": "challenge", - }, - status: responseCode, - body: "ABCDE", - }; - if (responseCode == 407) { - mockResponse.headers["proxy-authenticate"] = "Basic realm=\"protected area\""; - } else if (responseCode == 401) { - mockResponse.headers["www-authenticate"] = "Basic realm=\"protected area\""; - } else if (responseCode == 204 || responseCode == 205) { - mockResponse.body = ""; // We forbid bodies for 204 and 205. - } - - const request = {url: "/", headers:{}}; - - const cache = new CachePolicy(request, mockResponse, {shared:false}); - - assert.equal(shouldPut, cache.storable()); - } - - - it('defaultExpirationDateFullyCachedForLessThan24Hours', function() { - // last modified: 105 seconds ago - // served: 5 seconds ago - // default lifetime: (105 - 5) / 10 = 10 seconds - // expires: 10 seconds from served date = 5 seconds from now - const cache = new CachePolicy({headers:{}}, {headers:{ - "last-modified": formatDate(-105, 1), - "date": formatDate(-5, 1), - }, - body: "A"}, {shared:false}); - - assert(cache.timeToLive() > 4000); - }); - - it('defaultExpirationDateFullyCachedForMoreThan24Hours', function() { - // last modified: 105 days ago - // served: 5 days ago - // default lifetime: (105 - 5) / 10 = 10 days - // expires: 10 days from served date = 5 days from now - const cache = new CachePolicy({headers:{}}, {headers:{ - "last-modified": formatDate(-105, 3600*24), - "date": formatDate(-5, 3600*24), - }, - body: "A"}, {shared:false}); - - assert(cache.maxAge() >= 10*3600*24); - assert(cache.timeToLive()+1000 >= 5*3600*24); - }); - - it('maxAgeInThePastWithDateHeaderButNoLastModifiedHeader', function() { - // Chrome interprets max-age relative to the local clock. Both our cache - // and Firefox both use the earlier of the local and server's clock. - const cache = new CachePolicy({headers:{}}, {headers:{ - "date": formatDate(-120, 1), - "cache-control": "max-age=60", - }}, {shared:false}); - - assert(cache.stale()); - }); - - it('maxAgePreferredOverLowerSharedMaxAge', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "date": formatDate(-2, 60), - "cache-control": "s-maxage=60, max-age=180", - }}, {shared:false}); - - assert.equal(cache.maxAge(), 180); - }); - - it('maxAgePreferredOverHigherMaxAge', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "date": formatDate(-3, 60), - "cache-control": "s-maxage=60, max-age=180", - }}, {shared:false}); - - assert(cache.stale()); - }); - - it('requestMethodOptionsIsNotCached', function() { - testRequestMethodNotCached("OPTIONS"); - }); - - it('requestMethodPutIsNotCached', function() { - testRequestMethodNotCached("PUT"); - }); - - it('requestMethodDeleteIsNotCached', function() { - testRequestMethodNotCached("DELETE"); - }); - - it('requestMethodTraceIsNotCached', function() { - testRequestMethodNotCached("TRACE"); - }); - - function testRequestMethodNotCached(method) { - // 1. seed the cache (potentially) - // 2. expect a cache hit or miss - const cache = new CachePolicy({method, headers:{}}, {headers:{ - "expires": formatDate(1, 3600), - }}, {shared:false}); - - assert(cache.stale()); - } - - it('etagAndExpirationDateInTheFuture', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "etag": "v1", - "last-modified": formatDate(-2, 3600), - "expires": formatDate(1, 3600), - }}, {shared:false}); - - assert(cache.timeToLive() > 0); - }); - - it('clientSideNoStore', function() { - const cache = new CachePolicy({headers:{ - "cache-control": "no-store", - }}, {headers:{ - "cache-control": "max-age=60", - }}, {shared:false}); - - assert(!cache.storable()); - }); - - it('requestMaxAge', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "last-modified": formatDate(-2, 3600), - "date": formatDate(-1, 60), - "expires": formatDate(1, 3600), - }}, {shared:false}); - - assert(!cache.stale()); - assert(cache.age() >= 60); - - assert(cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "max-age=90", - }})); - - assert(!cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "max-age=30", - }})); - }); - - it('requestMinFresh', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "cache-control": "max-age=60", - }}, {shared:false}); - - assert(!cache.stale()); - - assert(!cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "min-fresh=120", - }})); - - assert(cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "min-fresh=10", - }})); - }); - - it('requestMaxStale', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "cache-control": "max-age=120", - "date": formatDate(-4, 60), - }}, {shared:false}); - - assert(cache.stale()); - - assert(cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "max-stale=180", - }})); - - assert(cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "max-stale", - }})); - - assert(!cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "max-stale=10", - }})); - }); - - it('requestMaxStaleNotHonoredWithMustRevalidate', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "cache-control": "max-age=120, must-revalidate", - "date": formatDate(-4, 60), - }}, {shared:false}); - - assert(cache.stale()); - - assert(!cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "max-stale=180", - }})); - - assert(!cache.satisfiesWithoutRevalidation({headers:{ - "cache-control": "max-stale", - }})); - }); - - it('getHeadersDeletesCached100LevelWarnings', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "warning": "199 test danger, 200 ok ok", - }}); - - assert.equal("200 ok ok", cache.responseHeaders().warning); - }); - - it('doNotCachePartialResponse', function() { - const cache = new CachePolicy({headers:{}}, { - status: 206, - headers:{ - "content-range": "bytes 100-100/200", - "cache-control": "max-age=60", - }}); - assert(!cache.storable()); - }); - - function formatDate(delta, unit) { - return new Date(Date.now() + delta*unit*1000).toUTCString(); - } +describe('okhttp tests', function() { + it('responseCachingByResponseCode', function() { + // Test each documented HTTP/1.1 code, plus the first unused value in each range. + // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html + + assertCached(false, 100); + assertCached(false, 101); + assertCached(false, 102); + assertCached(true, 200); + assertCached(false, 201); + assertCached(false, 202); + assertCached(true, 203); + assertCached(true, 204); + assertCached(false, 205); + assertCached(false, 206); //Electing to not cache partial responses + assertCached(false, 207); + assertCached(true, 300); + assertCached(true, 301); + assertCached(true, 302); + // assertCached(false, 303); + assertCached(false, 304); + assertCached(false, 305); + assertCached(false, 306); + assertCached(true, 307); + assertCached(true, 308); + assertCached(false, 400); + assertCached(false, 401); + assertCached(false, 402); + assertCached(false, 403); + assertCached(true, 404); + assertCached(true, 405); + assertCached(false, 406); + assertCached(false, 408); + assertCached(false, 409); + // the HTTP spec permits caching 410s, but the RI doesn't. + assertCached(true, 410); + assertCached(false, 411); + assertCached(false, 412); + assertCached(false, 413); + assertCached(true, 414); + assertCached(false, 415); + assertCached(false, 416); + assertCached(false, 417); + assertCached(false, 418); + assertCached(false, 429); + + assertCached(false, 500); + assertCached(true, 501); + assertCached(false, 502); + assertCached(false, 503); + assertCached(false, 504); + assertCached(false, 505); + assertCached(false, 506); + }); + + function assertCached(shouldPut, responseCode) { + let expectedResponseCode = responseCode; + + const mockResponse = { + headers: { + 'last-modified': formatDate(-1, 3600), + expires: formatDate(1, 3600), + 'www-authenticate': 'challenge', + }, + status: responseCode, + body: 'ABCDE', + }; + if (responseCode == 407) { + mockResponse.headers['proxy-authenticate'] = + 'Basic realm="protected area"'; + } else if (responseCode == 401) { + mockResponse.headers['www-authenticate'] = + 'Basic realm="protected area"'; + } else if (responseCode == 204 || responseCode == 205) { + mockResponse.body = ''; // We forbid bodies for 204 and 205. + } + + const request = { url: '/', headers: {} }; + + const cache = new CachePolicy(request, mockResponse, { shared: false }); + + assert.equal(shouldPut, cache.storable()); + } + + it('defaultExpirationDateFullyCachedForLessThan24Hours', function() { + // last modified: 105 seconds ago + // served: 5 seconds ago + // default lifetime: (105 - 5) / 10 = 10 seconds + // expires: 10 seconds from served date = 5 seconds from now + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + 'last-modified': formatDate(-105, 1), + date: formatDate(-5, 1), + }, + body: 'A', + }, + { shared: false } + ); + + assert(cache.timeToLive() > 4000); + }); + + it('defaultExpirationDateFullyCachedForMoreThan24Hours', function() { + // last modified: 105 days ago + // served: 5 days ago + // default lifetime: (105 - 5) / 10 = 10 days + // expires: 10 days from served date = 5 days from now + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + 'last-modified': formatDate(-105, 3600 * 24), + date: formatDate(-5, 3600 * 24), + }, + body: 'A', + }, + { shared: false } + ); + + assert(cache.maxAge() >= 10 * 3600 * 24); + assert(cache.timeToLive() + 1000 >= 5 * 3600 * 24); + }); + + it('maxAgeInThePastWithDateHeaderButNoLastModifiedHeader', function() { + // Chrome interprets max-age relative to the local clock. Both our cache + // and Firefox both use the earlier of the local and server's clock. + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + date: formatDate(-120, 1), + 'cache-control': 'max-age=60', + }, + }, + { shared: false } + ); + + assert(cache.stale()); + }); + + it('maxAgePreferredOverLowerSharedMaxAge', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + date: formatDate(-2, 60), + 'cache-control': 's-maxage=60, max-age=180', + }, + }, + { shared: false } + ); + + assert.equal(cache.maxAge(), 180); + }); + + it('maxAgePreferredOverHigherMaxAge', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + date: formatDate(-3, 60), + 'cache-control': 's-maxage=60, max-age=180', + }, + }, + { shared: false } + ); + + assert(cache.stale()); + }); + + it('requestMethodOptionsIsNotCached', function() { + testRequestMethodNotCached('OPTIONS'); + }); + + it('requestMethodPutIsNotCached', function() { + testRequestMethodNotCached('PUT'); + }); + + it('requestMethodDeleteIsNotCached', function() { + testRequestMethodNotCached('DELETE'); + }); + + it('requestMethodTraceIsNotCached', function() { + testRequestMethodNotCached('TRACE'); + }); + + function testRequestMethodNotCached(method) { + // 1. seed the cache (potentially) + // 2. expect a cache hit or miss + const cache = new CachePolicy( + { method, headers: {} }, + { + headers: { + expires: formatDate(1, 3600), + }, + }, + { shared: false } + ); + + assert(cache.stale()); + } + + it('etagAndExpirationDateInTheFuture', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + etag: 'v1', + 'last-modified': formatDate(-2, 3600), + expires: formatDate(1, 3600), + }, + }, + { shared: false } + ); + + assert(cache.timeToLive() > 0); + }); + + it('clientSideNoStore', function() { + const cache = new CachePolicy( + { + headers: { + 'cache-control': 'no-store', + }, + }, + { + headers: { + 'cache-control': 'max-age=60', + }, + }, + { shared: false } + ); + + assert(!cache.storable()); + }); + + it('requestMaxAge', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + 'last-modified': formatDate(-2, 3600), + date: formatDate(-1, 60), + expires: formatDate(1, 3600), + }, + }, + { shared: false } + ); + + assert(!cache.stale()); + assert(cache.age() >= 60); + + assert( + cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'max-age=90', + }, + }) + ); + + assert( + !cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'max-age=30', + }, + }) + ); + }); + + it('requestMinFresh', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + 'cache-control': 'max-age=60', + }, + }, + { shared: false } + ); + + assert(!cache.stale()); + + assert( + !cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'min-fresh=120', + }, + }) + ); + + assert( + cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'min-fresh=10', + }, + }) + ); + }); + + it('requestMaxStale', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + 'cache-control': 'max-age=120', + date: formatDate(-4, 60), + }, + }, + { shared: false } + ); + + assert(cache.stale()); + + assert( + cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'max-stale=180', + }, + }) + ); + + assert( + cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'max-stale', + }, + }) + ); + + assert( + !cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'max-stale=10', + }, + }) + ); + }); + + it('requestMaxStaleNotHonoredWithMustRevalidate', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + 'cache-control': 'max-age=120, must-revalidate', + date: formatDate(-4, 60), + }, + }, + { shared: false } + ); + + assert(cache.stale()); + + assert( + !cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'max-stale=180', + }, + }) + ); + + assert( + !cache.satisfiesWithoutRevalidation({ + headers: { + 'cache-control': 'max-stale', + }, + }) + ); + }); + + it('getHeadersDeletesCached100LevelWarnings', function() { + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + warning: '199 test danger, 200 ok ok', + }, + } + ); + + assert.equal('200 ok ok', cache.responseHeaders().warning); + }); + + it('doNotCachePartialResponse', function() { + const cache = new CachePolicy( + { headers: {} }, + { + status: 206, + headers: { + 'content-range': 'bytes 100-100/200', + 'cache-control': 'max-age=60', + }, + } + ); + assert(!cache.storable()); + }); + + function formatDate(delta, unit) { + return new Date(Date.now() + delta * unit * 1000).toUTCString(); + } }); diff --git a/test/requesttest.js b/test/requesttest.js index f668556..5da021f 100644 --- a/test/requesttest.js +++ b/test/requesttest.js @@ -3,58 +3,87 @@ const assert = require('assert'); const CachePolicy = require('..'); -const publicCacheableResponse = {headers:{'cache-control': 'public, max-age=222'}}; -const cacheableResponse = {headers:{'cache-control': 'max-age=111'}}; +const publicCacheableResponse = { + headers: { 'cache-control': 'public, max-age=222' }, +}; +const cacheableResponse = { headers: { 'cache-control': 'max-age=111' } }; describe('Request properties', function() { it('No store kills cache', function() { - const cache = new CachePolicy({method:'GET',headers:{'cache-control':'no-store'}}, publicCacheableResponse); + const cache = new CachePolicy( + { method: 'GET', headers: { 'cache-control': 'no-store' } }, + publicCacheableResponse + ); assert(cache.stale()); assert(!cache.storable()); }); it('POST not cacheable by default', function() { - const cache = new CachePolicy({method:'POST',headers:{}}, {headers:{'cache-control': 'public'}}); + const cache = new CachePolicy( + { method: 'POST', headers: {} }, + { headers: { 'cache-control': 'public' } } + ); assert(cache.stale()); assert(!cache.storable()); }); it('POST cacheable explicitly', function() { - const cache = new CachePolicy({method:'POST',headers:{}}, publicCacheableResponse); + const cache = new CachePolicy( + { method: 'POST', headers: {} }, + publicCacheableResponse + ); assert(!cache.stale()); assert(cache.storable()); }); it('Public cacheable auth is OK', function() { - const cache = new CachePolicy({method:'GET',headers:{'authorization': 'test'}}, publicCacheableResponse); + const cache = new CachePolicy( + { method: 'GET', headers: { authorization: 'test' } }, + publicCacheableResponse + ); assert(!cache.stale()); assert(cache.storable()); }); it('Proxy cacheable auth is OK', function() { - const cache = new CachePolicy({method:'GET',headers:{'authorization': 'test'}}, {headers:{'cache-control':'max-age=0,s-maxage=12'}}); + const cache = new CachePolicy( + { method: 'GET', headers: { authorization: 'test' } }, + { headers: { 'cache-control': 'max-age=0,s-maxage=12' } } + ); assert(!cache.stale()); assert(cache.storable()); - const cache2 = CachePolicy.fromObject(JSON.parse(JSON.stringify(cache.toObject()))); + const cache2 = CachePolicy.fromObject( + JSON.parse(JSON.stringify(cache.toObject())) + ); assert(cache2 instanceof CachePolicy); assert(!cache2.stale()); assert(cache2.storable()); }); it('Private auth is OK', function() { - const cache = new CachePolicy({method:'GET',headers:{'authorization': 'test'}}, cacheableResponse, {shared:false}); + const cache = new CachePolicy( + { method: 'GET', headers: { authorization: 'test' } }, + cacheableResponse, + { shared: false } + ); assert(!cache.stale()); assert(cache.storable()); }); it('Revalidated auth is OK', function() { - const cache = new CachePolicy({headers:{'authorization': 'test'}}, {headers:{'cache-control':'max-age=88,must-revalidate'}}); + const cache = new CachePolicy( + { headers: { authorization: 'test' } }, + { headers: { 'cache-control': 'max-age=88,must-revalidate' } } + ); assert(cache.storable()); }); it('Auth prevents caching by default', function() { - const cache = new CachePolicy({method:'GET',headers:{'authorization': 'test'}}, cacheableResponse); + const cache = new CachePolicy( + { method: 'GET', headers: { authorization: 'test' } }, + cacheableResponse + ); assert(cache.stale()); assert(!cache.storable()); }); diff --git a/test/responsetest.js b/test/responsetest.js index f15b2a6..a3a98d9 100644 --- a/test/responsetest.js +++ b/test/responsetest.js @@ -3,46 +3,60 @@ const assert = require('assert'); const CachePolicy = require('..'); -const req = {method:'GET', headers:{}}; +const req = { method: 'GET', headers: {} }; describe('Response headers', function() { it('simple miss', function() { - const cache = new CachePolicy(req, {headers:{}}); + const cache = new CachePolicy(req, { headers: {} }); assert(cache.stale()); }); it('simple hit', function() { - const cache = new CachePolicy(req, {headers:{'cache-control': 'public, max-age=999999'}}); + const cache = new CachePolicy(req, { + headers: { 'cache-control': 'public, max-age=999999' }, + }); assert(!cache.stale()); assert.equal(cache.maxAge(), 999999); }); it('weird syntax', function() { - const cache = new CachePolicy(req, {headers:{'cache-control': ',,,,max-age = 456 ,'}}); + const cache = new CachePolicy(req, { + headers: { 'cache-control': ',,,,max-age = 456 ,' }, + }); assert(!cache.stale()); assert.equal(cache.maxAge(), 456); - const cache2 = CachePolicy.fromObject(JSON.parse(JSON.stringify(cache.toObject()))); + const cache2 = CachePolicy.fromObject( + JSON.parse(JSON.stringify(cache.toObject())) + ); assert(cache2 instanceof CachePolicy); assert(!cache2.stale()); assert.equal(cache2.maxAge(), 456); }); it('quoted syntax', function() { - const cache = new CachePolicy(req, {headers:{'cache-control': ' max-age = "678" '}}); + const cache = new CachePolicy(req, { + headers: { 'cache-control': ' max-age = "678" ' }, + }); assert(!cache.stale()); assert.equal(cache.maxAge(), 678); }); it('IIS', function() { - const cache = new CachePolicy(req, {headers:{'cache-control': 'private, public, max-age=259200'}}, {shared:false}); + const cache = new CachePolicy( + req, + { headers: { 'cache-control': 'private, public, max-age=259200' } }, + { shared: false } + ); assert(!cache.stale()); assert.equal(cache.maxAge(), 259200); }); it('pre-check tolerated', function() { const cc = 'pre-check=0, post-check=0, no-store, no-cache, max-age=100'; - const cache = new CachePolicy(req, {headers:{'cache-control': cc}}); + const cache = new CachePolicy(req, { + headers: { 'cache-control': cc }, + }); assert(cache.stale()); assert(!cache.storable()); assert.equal(cache.maxAge(), 0); @@ -50,9 +64,12 @@ describe('Response headers', function() { }); it('pre-check poison', function() { - const origCC = 'pre-check=0, post-check=0, no-cache, no-store, max-age=100, custom, foo=bar'; - const res = {headers:{'cache-control': origCC, pragma: 'no-cache'}}; - const cache = new CachePolicy(req, res, {ignoreCargoCult:true}); + const origCC = + 'pre-check=0, post-check=0, no-cache, no-store, max-age=100, custom, foo=bar'; + const res = { + headers: { 'cache-control': origCC, pragma: 'no-cache' }, + }; + const cache = new CachePolicy(req, res, { ignoreCargoCult: true }); assert(!cache.stale()); assert(cache.storable()); assert.equal(cache.maxAge(), 100); @@ -73,8 +90,10 @@ describe('Response headers', function() { it('pre-check poison undefined header', function() { const origCC = 'pre-check=0, post-check=0, no-cache, no-store'; - const res = {headers:{'cache-control': origCC, expires: 'yesterday!'}}; - const cache = new CachePolicy(req, res, {ignoreCargoCult:true}); + const res = { + headers: { 'cache-control': origCC, expires: 'yesterday!' }, + }; + const cache = new CachePolicy(req, res, { ignoreCargoCult: true }); assert(cache.stale()); assert(cache.storable()); assert.equal(cache.maxAge(), 0); @@ -88,37 +107,49 @@ describe('Response headers', function() { it('cache with expires', function() { const now = Date.now(); - const cache = new CachePolicy(req, {headers:{ - 'date': new Date(now).toGMTString(), - 'expires': new Date(now + 2000).toGMTString(), - }}); + const cache = new CachePolicy(req, { + headers: { + date: new Date(now).toGMTString(), + expires: new Date(now + 2000).toGMTString(), + }, + }); assert(!cache.stale()); assert.equal(2, cache.maxAge()); }); it('cache with expires relative to date', function() { const now = Date.now(); - const cache = new CachePolicy(req, {headers:{ - 'date': new Date(now-3000).toGMTString(), - 'expires': new Date(now).toGMTString(), - }}); + const cache = new CachePolicy(req, { + headers: { + date: new Date(now - 3000).toGMTString(), + expires: new Date(now).toGMTString(), + }, + }); assert.equal(3, cache.maxAge()); }); it('cache with expires always relative to date', function() { const now = Date.now(); - const cache = new CachePolicy(req, {headers:{ - 'date': new Date(now-3000).toGMTString(), - 'expires': new Date(now).toGMTString(), - }},{trustServerDate:false}); + const cache = new CachePolicy( + req, + { + headers: { + date: new Date(now - 3000).toGMTString(), + expires: new Date(now).toGMTString(), + }, + }, + { trustServerDate: false } + ); assert.equal(3, cache.maxAge()); }); it('cache expires no date', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control': 'public', - 'expires': new Date(Date.now()+3600*1000).toGMTString(), - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'public', + expires: new Date(Date.now() + 3600 * 1000).toGMTString(), + }, + }); assert(!cache.stale()); assert(cache.maxAge() > 3595); assert(cache.maxAge() < 3605); @@ -131,102 +162,128 @@ describe('Response headers', function() { return now; } } - const cache = new TimeTravellingPolicy(req, {headers:{ - 'cache-control':'max-age=100', - 'age': '50', - }}); + const cache = new TimeTravellingPolicy(req, { + headers: { + 'cache-control': 'max-age=100', + age: '50', + }, + }); assert(cache.storable()); - assert.equal(50*1000, cache.timeToLive()); + assert.equal(50 * 1000, cache.timeToLive()); assert(!cache.stale()); - now += 48*1000; - assert.equal(2*1000, cache.timeToLive()); + now += 48 * 1000; + assert.equal(2 * 1000, cache.timeToLive()); assert(!cache.stale()); - now += 5*1000; + now += 5 * 1000; assert(cache.stale()); assert.equal(0, cache.timeToLive()); }); it('Age can make stale', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control':'max-age=100', - 'age': '101', - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'max-age=100', + age: '101', + }, + }); assert(cache.stale()); assert(cache.storable()); }); it('Age not always stale', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control':'max-age=20', - 'age': '15', - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'max-age=20', + age: '15', + }, + }); assert(!cache.stale()); assert(cache.storable()); }); it('Bogus age ignored', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control':'max-age=20', - 'age': 'golden', - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'max-age=20', + age: 'golden', + }, + }); assert(!cache.stale()); assert(cache.storable()); }); it('cache old files', function() { - const cache = new CachePolicy(req, {headers:{ - 'date': new Date().toGMTString(), - 'last-modified': 'Mon, 07 Mar 2016 11:52:56 GMT', - }}); + const cache = new CachePolicy(req, { + headers: { + date: new Date().toGMTString(), + 'last-modified': 'Mon, 07 Mar 2016 11:52:56 GMT', + }, + }); assert(!cache.stale()); assert(cache.maxAge() > 100); }); it('immutable simple hit', function() { - const cache = new CachePolicy(req, {headers:{'cache-control': 'immutable, max-age=999999'}}); + const cache = new CachePolicy(req, { + headers: { 'cache-control': 'immutable, max-age=999999' }, + }); assert(!cache.stale()); assert.equal(cache.maxAge(), 999999); }); it('immutable can expire', function() { - const cache = new CachePolicy(req, {headers:{'cache-control': 'immutable, max-age=0'}}); + const cache = new CachePolicy(req, { + headers: { 'cache-control': 'immutable, max-age=0' }, + }); assert(cache.stale()); assert.equal(cache.maxAge(), 0); }); it('cache immutable files', function() { - const cache = new CachePolicy(req, {headers:{ - 'date': new Date().toGMTString(), - 'cache-control':'immutable', - 'last-modified': new Date().toGMTString(), - }}); + const cache = new CachePolicy(req, { + headers: { + date: new Date().toGMTString(), + 'cache-control': 'immutable', + 'last-modified': new Date().toGMTString(), + }, + }); assert(!cache.stale()); assert(cache.maxAge() > 100); }); it('immutable can be off', function() { - const cache = new CachePolicy(req, {headers:{ - 'date': new Date().toGMTString(), - 'cache-control':'immutable', - 'last-modified': new Date().toGMTString(), - }}, {immutableMinTimeToLive: 0}); + const cache = new CachePolicy( + req, + { + headers: { + date: new Date().toGMTString(), + 'cache-control': 'immutable', + 'last-modified': new Date().toGMTString(), + }, + }, + { immutableMinTimeToLive: 0 } + ); assert(cache.stale()); assert.equal(cache.maxAge(), 0); }); it('pragma: no-cache', function() { - const cache = new CachePolicy(req, {headers:{ - 'pragma': 'no-cache', - 'last-modified': 'Mon, 07 Mar 2016 11:52:56 GMT', - }}); + const cache = new CachePolicy(req, { + headers: { + pragma: 'no-cache', + 'last-modified': 'Mon, 07 Mar 2016 11:52:56 GMT', + }, + }); assert(cache.stale()); }); it('no-store', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control': 'no-store, public, max-age=1', - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'no-store, public, max-age=1', + }, + }); assert(cache.stale()); assert.equal(0, cache.maxAge()); }); @@ -235,25 +292,37 @@ describe('Response headers', function() { const privateHeader = { 'cache-control': 'private, max-age=1234', }; - const proxyCache = new CachePolicy(req, {headers:privateHeader}); + const proxyCache = new CachePolicy(req, { headers: privateHeader }); assert(proxyCache.stale()); assert.equal(0, proxyCache.maxAge()); - const uaCache = new CachePolicy(req, {headers:privateHeader}, {shared:false}); + const uaCache = new CachePolicy( + req, + { headers: privateHeader }, + { shared: false } + ); assert(!uaCache.stale()); assert.equal(1234, uaCache.maxAge()); }); - it('don\'t share cookies', function() { + it("don't share cookies", function() { const cookieHeader = { 'set-cookie': 'foo=bar', 'cache-control': 'max-age=99', }; - const proxyCache = new CachePolicy(req, {headers:cookieHeader}, {shared:true}); + const proxyCache = new CachePolicy( + req, + { headers: cookieHeader }, + { shared: true } + ); assert(proxyCache.stale()); assert.equal(0, proxyCache.maxAge()); - const uaCache = new CachePolicy(req, {headers:cookieHeader}, {shared:false}); + const uaCache = new CachePolicy( + req, + { headers: cookieHeader }, + { shared: false } + ); assert(!uaCache.stale()); assert.equal(99, uaCache.maxAge()); }); @@ -263,7 +332,11 @@ describe('Response headers', function() { 'set-cookie': 'foo=bar', 'cache-control': 'immutable, max-age=99', }; - const proxyCache = new CachePolicy(req, {headers:cookieHeader}, {shared:true}); + const proxyCache = new CachePolicy( + req, + { headers: cookieHeader }, + { shared: true } + ); assert(!proxyCache.stale()); assert.equal(99, proxyCache.maxAge()); }); @@ -273,15 +346,21 @@ describe('Response headers', function() { 'set-cookie': 'foo=bar', 'cache-control': 'max-age=5, public', }; - const proxyCache = new CachePolicy(req, {headers:cookieHeader}, {shared:true}); + const proxyCache = new CachePolicy( + req, + { headers: cookieHeader }, + { shared: true } + ); assert(!proxyCache.stale()); assert.equal(5, proxyCache.maxAge()); }); it('miss max-age=0', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control': 'public, max-age=0', - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'public, max-age=0', + }, + }); assert(cache.stale()); assert.equal(0, cache.maxAge()); }); @@ -289,9 +368,10 @@ describe('Response headers', function() { it('uncacheable 503', function() { const cache = new CachePolicy(req, { status: 503, - headers:{ + headers: { 'cache-control': 'public, max-age=1000', - }}); + }, + }); assert(cache.stale()); assert.equal(0, cache.maxAge()); }); @@ -299,18 +379,20 @@ describe('Response headers', function() { it('cacheable 301', function() { const cache = new CachePolicy(req, { status: 301, - headers:{ + headers: { 'last-modified': 'Mon, 07 Mar 2016 11:52:56 GMT', - }}); + }, + }); assert(!cache.stale()); }); it('uncacheable 303', function() { const cache = new CachePolicy(req, { status: 303, - headers:{ + headers: { 'last-modified': 'Mon, 07 Mar 2016 11:52:56 GMT', - }}); + }, + }); assert(cache.stale()); assert.equal(0, cache.maxAge()); }); @@ -318,27 +400,31 @@ describe('Response headers', function() { it('cacheable 303', function() { const cache = new CachePolicy(req, { status: 303, - headers:{ + headers: { 'cache-control': 'max-age=1000', - }}); + }, + }); assert(!cache.stale()); }); it('uncacheable 412', function() { const cache = new CachePolicy(req, { status: 412, - headers:{ + headers: { 'cache-control': 'public, max-age=1000', - }}); + }, + }); assert(cache.stale()); assert.equal(0, cache.maxAge()); }); it('expired expires cached with max-age', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control': 'public, max-age=9999', - 'expires': 'Sat, 07 May 2016 15:35:18 GMT', - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'public, max-age=9999', + expires: 'Sat, 07 May 2016 15:35:18 GMT', + }, + }); assert(!cache.stale()); assert.equal(9999, cache.maxAge()); }); @@ -346,22 +432,28 @@ describe('Response headers', function() { it('expired expires cached with s-maxage', function() { const sMaxAgeHeaders = { 'cache-control': 'public, s-maxage=9999', - 'expires': 'Sat, 07 May 2016 15:35:18 GMT', + expires: 'Sat, 07 May 2016 15:35:18 GMT', }; - const proxyCache = new CachePolicy(req, {headers:sMaxAgeHeaders}); + const proxyCache = new CachePolicy(req, { headers: sMaxAgeHeaders }); assert(!proxyCache.stale()); assert.equal(9999, proxyCache.maxAge()); - const uaCache = new CachePolicy(req, {headers:sMaxAgeHeaders}, {shared:false}); + const uaCache = new CachePolicy( + req, + { headers: sMaxAgeHeaders }, + { shared: false } + ); assert(uaCache.stale()); assert.equal(0, uaCache.maxAge()); }); it('max-age wins over future expires', function() { - const cache = new CachePolicy(req, {headers:{ - 'cache-control': 'public, max-age=333', - 'expires': new Date(Date.now()+3600*1000).toGMTString(), - }}); + const cache = new CachePolicy(req, { + headers: { + 'cache-control': 'public, max-age=333', + expires: new Date(Date.now() + 3600 * 1000).toGMTString(), + }, + }); assert(!cache.stale()); assert.equal(333, cache.maxAge()); }); @@ -374,15 +466,17 @@ describe('Response headers', function() { } } - const res = {headers:{ - 'te': 'deflate', - 'date': 'now', - 'custom': 'header', - 'oompa': 'lumpa', - 'connection': 'close, oompa, header', - 'age': '10', - 'cache-control': 'public, max-age=333', - }}; + const res = { + headers: { + te: 'deflate', + date: 'now', + custom: 'header', + oompa: 'lumpa', + connection: 'close, oompa, header', + age: '10', + 'cache-control': 'public, max-age=333', + }, + }; const cache = new TimeTravellingPolicy(req, res); now += 1005; @@ -391,12 +485,14 @@ describe('Response headers', function() { assert(!h.te); assert(!h.oompa); assert.equal(h['cache-control'], 'public, max-age=333'); - assert.notEqual(h.date, 'now', "updated age requires updated date"); + assert.notEqual(h.date, 'now', 'updated age requires updated date'); assert.equal(h.custom, 'header'); assert.equal(h.age, '11'); assert.equal(res.headers.age, '10'); - const cache2 = TimeTravellingPolicy.fromObject(JSON.parse(JSON.stringify(cache.toObject()))); + const cache2 = TimeTravellingPolicy.fromObject( + JSON.parse(JSON.stringify(cache.toObject())) + ); assert(cache2 instanceof TimeTravellingPolicy); const h2 = cache2.responseHeaders(); assert.deepEqual(h, h2); diff --git a/test/revalidatetest.js b/test/revalidatetest.js index 9dc7377..063f59e 100644 --- a/test/revalidatetest.js +++ b/test/revalidatetest.js @@ -4,67 +4,86 @@ const assert = require('assert'); const CachePolicy = require('..'); const simpleRequest = { - method:'GET', - headers:{ - host:'www.w3c.org', - connection: 'close', - 'x-custom': 'yes', + method: 'GET', + headers: { + host: 'www.w3c.org', + connection: 'close', + 'x-custom': 'yes', }, - url:'/Protocols/rfc2616/rfc2616-sec14.html', + url: '/Protocols/rfc2616/rfc2616-sec14.html', }; function simpleRequestBut(overrides) { return Object.assign({}, simpleRequest, overrides); } -const cacheableResponse = {headers:{'cache-control':'max-age=111'}}; -const etaggedResponse = {headers:Object.assign({'etag':'"123456789"'},cacheableResponse.headers)}; -const lastModifiedResponse = {headers:Object.assign({'last-modified':'Tue, 15 Nov 1994 12:45:26 GMT'},cacheableResponse.headers)}; -const multiValidatorResponse = {headers:Object.assign({},etaggedResponse.headers,lastModifiedResponse.headers)}; -const alwaysVariableResponse = {headers:Object.assign({'vary':'*'},cacheableResponse.headers)}; +const cacheableResponse = { headers: { 'cache-control': 'max-age=111' } }; +const etaggedResponse = { + headers: Object.assign({ etag: '"123456789"' }, cacheableResponse.headers), +}; +const lastModifiedResponse = { + headers: Object.assign( + { 'last-modified': 'Tue, 15 Nov 1994 12:45:26 GMT' }, + cacheableResponse.headers + ), +}; +const multiValidatorResponse = { + headers: Object.assign( + {}, + etaggedResponse.headers, + lastModifiedResponse.headers + ), +}; +const alwaysVariableResponse = { + headers: Object.assign({ vary: '*' }, cacheableResponse.headers), +}; function assertHeadersPassed(headers) { - assert.strictEqual(headers.connection, undefined); - assert.strictEqual(headers['x-custom'], 'yes'); + assert.strictEqual(headers.connection, undefined); + assert.strictEqual(headers['x-custom'], 'yes'); } function assertNoValidators(headers) { - assert.strictEqual(headers['if-none-match'], undefined); - assert.strictEqual(headers['if-modified-since'], undefined); + assert.strictEqual(headers['if-none-match'], undefined); + assert.strictEqual(headers['if-modified-since'], undefined); } describe('Can be revalidated?', function() { - it('ok if method changes to HEAD', function(){ - const cache = new CachePolicy(simpleRequest,etaggedResponse); - const headers = cache.revalidationHeaders(simpleRequestBut({method:'HEAD'})); - assertHeadersPassed(headers); - assert.equal(headers['if-none-match'], '"123456789"'); + it('ok if method changes to HEAD', function() { + const cache = new CachePolicy(simpleRequest, etaggedResponse); + const headers = cache.revalidationHeaders( + simpleRequestBut({ method: 'HEAD' }) + ); + assertHeadersPassed(headers); + assert.equal(headers['if-none-match'], '"123456789"'); }); - it('not if method mismatch (other than HEAD)', function(){ - const cache = new CachePolicy(simpleRequest,etaggedResponse); - const incomingRequest = simpleRequestBut({method:'POST'}); + it('not if method mismatch (other than HEAD)', function() { + const cache = new CachePolicy(simpleRequest, etaggedResponse); + const incomingRequest = simpleRequestBut({ method: 'POST' }); const headers = cache.revalidationHeaders(incomingRequest); assertHeadersPassed(headers); assertNoValidators(headers); }); - it('not if url mismatch', function(){ - const cache = new CachePolicy(simpleRequest,etaggedResponse); - const incomingRequest = simpleRequestBut({url:'/yomomma'}); + it('not if url mismatch', function() { + const cache = new CachePolicy(simpleRequest, etaggedResponse); + const incomingRequest = simpleRequestBut({ url: '/yomomma' }); const headers = cache.revalidationHeaders(incomingRequest); assertHeadersPassed(headers); assertNoValidators(headers); }); - it('not if host mismatch', function(){ - const cache = new CachePolicy(simpleRequest,etaggedResponse); - const incomingRequest = simpleRequestBut({headers:{host:'www.w4c.org'}}); + it('not if host mismatch', function() { + const cache = new CachePolicy(simpleRequest, etaggedResponse); + const incomingRequest = simpleRequestBut({ + headers: { host: 'www.w4c.org' }, + }); const headers = cache.revalidationHeaders(incomingRequest); assertNoValidators(headers); assert.strictEqual(headers['x-custom'], undefined); }); - it('not if vary fields prevent', function(){ - const cache = new CachePolicy(simpleRequest,alwaysVariableResponse); + it('not if vary fields prevent', function() { + const cache = new CachePolicy(simpleRequest, alwaysVariableResponse); const headers = cache.revalidationHeaders(simpleRequest); assertHeadersPassed(headers); assertNoValidators(headers); @@ -78,7 +97,10 @@ describe('Can be revalidated?', function() { }); it('skips weak validtors on post', function() { - const postReq = simpleRequestBut({method:'POST', headers:{'if-none-match': 'W/"weak", "strong", W/"weak2"'}}); + const postReq = simpleRequestBut({ + method: 'POST', + headers: { 'if-none-match': 'W/"weak", "strong", W/"weak2"' }, + }); const cache = new CachePolicy(postReq, multiValidatorResponse); const headers = cache.revalidationHeaders(postReq); assert.equal(headers['if-none-match'], '"strong", "123456789"'); @@ -86,7 +108,10 @@ describe('Can be revalidated?', function() { }); it('skips weak validtors on post 2', function() { - const postReq = simpleRequestBut({method:'POST', headers:{'if-none-match': 'W/"weak"'}}); + const postReq = simpleRequestBut({ + method: 'POST', + headers: { 'if-none-match': 'W/"weak"' }, + }); const cache = new CachePolicy(postReq, lastModifiedResponse); const headers = cache.revalidationHeaders(postReq); assert.strictEqual(undefined, headers['if-none-match']); @@ -94,18 +119,29 @@ describe('Can be revalidated?', function() { }); it('merges validtors', function() { - const postReq = simpleRequestBut({headers:{'if-none-match': 'W/"weak", "strong", W/"weak2"'}}); + const postReq = simpleRequestBut({ + headers: { 'if-none-match': 'W/"weak", "strong", W/"weak2"' }, + }); const cache = new CachePolicy(postReq, multiValidatorResponse); const headers = cache.revalidationHeaders(postReq); - assert.equal(headers['if-none-match'], 'W/"weak", "strong", W/"weak2", "123456789"'); - assert.equal('Tue, 15 Nov 1994 12:45:26 GMT', headers['if-modified-since']); + assert.equal( + headers['if-none-match'], + 'W/"weak", "strong", W/"weak2", "123456789"' + ); + assert.equal( + 'Tue, 15 Nov 1994 12:45:26 GMT', + headers['if-modified-since'] + ); }); it('when last-modified validator is present', function() { const cache = new CachePolicy(simpleRequest, lastModifiedResponse); const headers = cache.revalidationHeaders(simpleRequest); assertHeadersPassed(headers); - assert.equal(headers['if-modified-since'], 'Tue, 15 Nov 1994 12:45:26 GMT'); + assert.equal( + headers['if-modified-since'], + 'Tue, 15 Nov 1994 12:45:26 GMT' + ); assert(!/113/.test(headers.warning)); }); @@ -115,12 +151,12 @@ describe('Can be revalidated?', function() { assertHeadersPassed(headers); assertNoValidators(headers); assert(!/113/.test(headers.warning)); - }) + }); it('113 added', function() { const veryOldResponse = { headers: { - age: 3600*72, + age: 3600 * 72, 'last-modified': 'Tue, 15 Nov 1994 12:45:26 GMT', }, }; @@ -128,52 +164,73 @@ describe('Can be revalidated?', function() { const cache = new CachePolicy(simpleRequest, veryOldResponse); const headers = cache.responseHeaders(simpleRequest); assert(/113/.test(headers.warning)); - }) - + }); }); -describe('Validation request', function(){ +describe('Validation request', function() { it('removes warnings', function() { - const cache = new CachePolicy({headers:{}}, {headers:{ - "warning": "199 test danger", - }}); + const cache = new CachePolicy( + { headers: {} }, + { + headers: { + warning: '199 test danger', + }, + } + ); - assert.strictEqual(undefined, cache.responseHeaders().warning); + assert.strictEqual(undefined, cache.responseHeaders().warning); }); - it('must contain any etag', function(){ - const cache = new CachePolicy(simpleRequest,multiValidatorResponse); + it('must contain any etag', function() { + const cache = new CachePolicy(simpleRequest, multiValidatorResponse); const expected = multiValidatorResponse.headers.etag; - const actual = cache.revalidationHeaders(simpleRequest)['if-none-match']; - assert.equal(actual,expected); + const actual = cache.revalidationHeaders(simpleRequest)[ + 'if-none-match' + ]; + assert.equal(actual, expected); }); - it('merges etags', function(){ + it('merges etags', function() { const cache = new CachePolicy(simpleRequest, etaggedResponse); const expected = `"foo", "bar", ${etaggedResponse.headers.etag}`; - const headers = cache.revalidationHeaders(simpleRequestBut({headers:{ - host:'www.w3c.org', - 'if-none-match': '"foo", "bar"', - }})); - assert.equal(headers['if-none-match'],expected); - }); - - it('should send the Last-Modified value', function(){ - const cache = new CachePolicy(simpleRequest,multiValidatorResponse); + const headers = cache.revalidationHeaders( + simpleRequestBut({ + headers: { + host: 'www.w3c.org', + 'if-none-match': '"foo", "bar"', + }, + }) + ); + assert.equal(headers['if-none-match'], expected); + }); + + it('should send the Last-Modified value', function() { + const cache = new CachePolicy(simpleRequest, multiValidatorResponse); const expected = multiValidatorResponse.headers['last-modified']; - const actual = cache.revalidationHeaders(simpleRequest)['if-modified-since']; - assert.equal(actual,expected); + const actual = cache.revalidationHeaders(simpleRequest)[ + 'if-modified-since' + ]; + assert.equal(actual, expected); }); - it('should not send the Last-Modified value for POST', function(){ - const postReq = {method:'POST', headers:{'if-modified-since':'yesterday'}}; + it('should not send the Last-Modified value for POST', function() { + const postReq = { + method: 'POST', + headers: { 'if-modified-since': 'yesterday' }, + }; const cache = new CachePolicy(postReq, lastModifiedResponse); const actual = cache.revalidationHeaders(postReq)['if-modified-since']; assert.equal(actual, undefined); }); - it('should not send the Last-Modified value for range requests', function(){ - const rangeReq = {method:'GET', headers:{'accept-ranges':'1-3', 'if-modified-since':'yesterday'}}; + it('should not send the Last-Modified value for range requests', function() { + const rangeReq = { + method: 'GET', + headers: { + 'accept-ranges': '1-3', + 'if-modified-since': 'yesterday', + }, + }; const cache = new CachePolicy(rangeReq, lastModifiedResponse); const actual = cache.revalidationHeaders(rangeReq)['if-modified-since']; assert.equal(actual, undefined); diff --git a/test/satisfytest.js b/test/satisfytest.js index 3131ee7..cb2434a 100644 --- a/test/satisfytest.js +++ b/test/satisfytest.js @@ -5,60 +5,134 @@ const CachePolicy = require('..'); describe('Satisfies', function() { it('when URLs match', function() { - const policy = new CachePolicy({url:'/',headers:{}}, {status:200,headers:{'cache-control':'max-age=2'}}); - assert(policy.satisfiesWithoutRevalidation({url:'/',headers:{}})); + const policy = new CachePolicy( + { url: '/', headers: {} }, + { status: 200, headers: { 'cache-control': 'max-age=2' } } + ); + assert(policy.satisfiesWithoutRevalidation({ url: '/', headers: {} })); }); it('when expires is present', function() { - const policy = new CachePolicy({headers:{}}, {status:302,headers:{'expires':new Date(Date.now()+2000).toGMTString()}}); - assert(policy.satisfiesWithoutRevalidation({headers:{}})); + const policy = new CachePolicy( + { headers: {} }, + { + status: 302, + headers: { expires: new Date(Date.now() + 2000).toGMTString() }, + } + ); + assert(policy.satisfiesWithoutRevalidation({ headers: {} })); }); it('not when URLs mismatch', function() { - const policy = new CachePolicy({url:'/foo',headers:{}}, {status:200,headers:{'cache-control':'max-age=2'}}); - assert(!policy.satisfiesWithoutRevalidation({url:'/foo?bar',headers:{}})); + const policy = new CachePolicy( + { url: '/foo', headers: {} }, + { status: 200, headers: { 'cache-control': 'max-age=2' } } + ); + assert( + !policy.satisfiesWithoutRevalidation({ + url: '/foo?bar', + headers: {}, + }) + ); }); it('when methods match', function() { - const policy = new CachePolicy({method:'GET',headers:{}}, {status:200,headers:{'cache-control':'max-age=2'}}); - assert(policy.satisfiesWithoutRevalidation({method:'GET',headers:{}})); + const policy = new CachePolicy( + { method: 'GET', headers: {} }, + { status: 200, headers: { 'cache-control': 'max-age=2' } } + ); + assert( + policy.satisfiesWithoutRevalidation({ method: 'GET', headers: {} }) + ); }); it('not when hosts mismatch', function() { - const policy = new CachePolicy({headers:{'host':'foo'}}, {status:200,headers:{'cache-control':'max-age=2'}}); - assert(policy.satisfiesWithoutRevalidation({headers:{'host':'foo'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'host':'foofoo'}})); + const policy = new CachePolicy( + { headers: { host: 'foo' } }, + { status: 200, headers: { 'cache-control': 'max-age=2' } } + ); + assert( + policy.satisfiesWithoutRevalidation({ headers: { host: 'foo' } }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { host: 'foofoo' }, + }) + ); }); it('when methods match HEAD', function() { - const policy = new CachePolicy({method:'HEAD',headers:{}}, {status:200,headers:{'cache-control':'max-age=2'}}); - assert(policy.satisfiesWithoutRevalidation({method:'HEAD',headers:{}})); + const policy = new CachePolicy( + { method: 'HEAD', headers: {} }, + { status: 200, headers: { 'cache-control': 'max-age=2' } } + ); + assert( + policy.satisfiesWithoutRevalidation({ method: 'HEAD', headers: {} }) + ); }); it('not when methods mismatch', function() { - const policy = new CachePolicy({method:'POST',headers:{}}, {status:200,headers:{'cache-control':'max-age=2'}}); - assert(!policy.satisfiesWithoutRevalidation({method:'GET',headers:{}})); + const policy = new CachePolicy( + { method: 'POST', headers: {} }, + { status: 200, headers: { 'cache-control': 'max-age=2' } } + ); + assert( + !policy.satisfiesWithoutRevalidation({ method: 'GET', headers: {} }) + ); }); it('not when methods mismatch HEAD', function() { - const policy = new CachePolicy({method:'HEAD',headers:{}}, {status:200,headers:{'cache-control':'max-age=2'}}); - assert(!policy.satisfiesWithoutRevalidation({method:'GET',headers:{}})); + const policy = new CachePolicy( + { method: 'HEAD', headers: {} }, + { status: 200, headers: { 'cache-control': 'max-age=2' } } + ); + assert( + !policy.satisfiesWithoutRevalidation({ method: 'GET', headers: {} }) + ); }); it('not when proxy revalidating', function() { - const policy = new CachePolicy({headers:{}}, {status:200,headers:{'cache-control':'max-age=2, proxy-revalidate '}}); - assert(!policy.satisfiesWithoutRevalidation({headers:{}})); + const policy = new CachePolicy( + { headers: {} }, + { + status: 200, + headers: { 'cache-control': 'max-age=2, proxy-revalidate ' }, + } + ); + assert(!policy.satisfiesWithoutRevalidation({ headers: {} })); }); it('when not a proxy revalidating', function() { - const policy = new CachePolicy({headers:{}}, {status:200,headers:{'cache-control':'max-age=2, proxy-revalidate '}}, {shared:false}); - assert(policy.satisfiesWithoutRevalidation({headers:{}})); + const policy = new CachePolicy( + { headers: {} }, + { + status: 200, + headers: { 'cache-control': 'max-age=2, proxy-revalidate ' }, + }, + { shared: false } + ); + assert(policy.satisfiesWithoutRevalidation({ headers: {} })); }); it('not when no-cache requesting', function() { - const policy = new CachePolicy({headers:{}}, {headers:{'cache-control':'max-age=2'}}); - assert(policy.satisfiesWithoutRevalidation({headers:{'cache-control':'fine'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'cache-control':'no-cache'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'pragma':'no-cache'}})); + const policy = new CachePolicy( + { headers: {} }, + { headers: { 'cache-control': 'max-age=2' } } + ); + assert( + policy.satisfiesWithoutRevalidation({ + headers: { 'cache-control': 'fine' }, + }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { 'cache-control': 'no-cache' }, + }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { pragma: 'no-cache' }, + }) + ); }); }); diff --git a/test/updatetest.js b/test/updatetest.js index 6d498c8..93e1dbc 100644 --- a/test/updatetest.js +++ b/test/updatetest.js @@ -4,12 +4,12 @@ const assert = require('assert'); const CachePolicy = require('..'); const simpleRequest = { - method:'GET', - headers:{ - host:'www.w3c.org', - connection: 'close', + method: 'GET', + headers: { + host: 'www.w3c.org', + connection: 'close', }, - url:'/Protocols/rfc2616/rfc2616-sec14.html', + url: '/Protocols/rfc2616/rfc2616-sec14.html', }; function withHeaders(request, headers) { return Object.assign({}, request, { @@ -17,25 +17,63 @@ function withHeaders(request, headers) { }); } -const cacheableResponse = {headers:{'cache-control':'max-age=111'}}; -const etaggedResponse = {headers:Object.assign({'etag':'"123456789"'},cacheableResponse.headers)}; -const weakTaggedResponse = {headers:Object.assign({'etag':'W/"123456789"'},cacheableResponse.headers)}; -const lastModifiedResponse = {headers:Object.assign({'last-modified':'Tue, 15 Nov 1994 12:45:26 GMT'},cacheableResponse.headers)}; -const multiValidatorResponse = {headers:Object.assign({},etaggedResponse.headers,lastModifiedResponse.headers)}; +const cacheableResponse = { headers: { 'cache-control': 'max-age=111' } }; +const etaggedResponse = { + headers: Object.assign({ etag: '"123456789"' }, cacheableResponse.headers), +}; +const weakTaggedResponse = { + headers: Object.assign( + { etag: 'W/"123456789"' }, + cacheableResponse.headers + ), +}; +const lastModifiedResponse = { + headers: Object.assign( + { 'last-modified': 'Tue, 15 Nov 1994 12:45:26 GMT' }, + cacheableResponse.headers + ), +}; +const multiValidatorResponse = { + headers: Object.assign( + {}, + etaggedResponse.headers, + lastModifiedResponse.headers + ), +}; -function notModifiedResponseHeaders(firstRequest, firstResponse, secondRequest, secondResponse) { +function notModifiedResponseHeaders( + firstRequest, + firstResponse, + secondRequest, + secondResponse +) { const cache = new CachePolicy(firstRequest, firstResponse); const headers = cache.revalidationHeaders(secondRequest); - const {policy:newCache, modified} = cache.revalidatedPolicy({headers}, secondResponse); + const { policy: newCache, modified } = cache.revalidatedPolicy( + { headers }, + secondResponse + ); if (modified) { return false; } return newCache.responseHeaders(); } -function assertUpdates(firstRequest, firstResponse, secondRequest, secondResponse) { - const headers = notModifiedResponseHeaders(firstRequest, withHeaders(firstResponse, {'foo': 'original', 'x-other':'original'}), - secondRequest, withHeaders(secondResponse, {'foo': 'updated', 'x-ignore-new':'ignoreme'})); +function assertUpdates( + firstRequest, + firstResponse, + secondRequest, + secondResponse +) { + const headers = notModifiedResponseHeaders( + firstRequest, + withHeaders(firstResponse, { foo: 'original', 'x-other': 'original' }), + secondRequest, + withHeaders(secondResponse, { + foo: 'updated', + 'x-ignore-new': 'ignoreme', + }) + ); assert(headers); assert.equal(headers['foo'], 'updated'); assert.equal(headers['x-other'], 'original'); @@ -44,55 +82,172 @@ function assertUpdates(firstRequest, firstResponse, secondRequest, secondRespons } describe('Update revalidated', function() { - it('Matching etags are updated', function(){ - assertUpdates(simpleRequest, etaggedResponse, simpleRequest, etaggedResponse); + it('Matching etags are updated', function() { + assertUpdates( + simpleRequest, + etaggedResponse, + simpleRequest, + etaggedResponse + ); }); - it('Matching weak etags are updated', function(){ - assertUpdates(simpleRequest, weakTaggedResponse, simpleRequest, weakTaggedResponse); + it('Matching weak etags are updated', function() { + assertUpdates( + simpleRequest, + weakTaggedResponse, + simpleRequest, + weakTaggedResponse + ); }); - it('Matching lastmod are updated', function(){ - assertUpdates(simpleRequest, lastModifiedResponse, simpleRequest, lastModifiedResponse); + it('Matching lastmod are updated', function() { + assertUpdates( + simpleRequest, + lastModifiedResponse, + simpleRequest, + lastModifiedResponse + ); }); - it('Both matching are updated', function(){ - assertUpdates(simpleRequest, multiValidatorResponse, simpleRequest, multiValidatorResponse); + it('Both matching are updated', function() { + assertUpdates( + simpleRequest, + multiValidatorResponse, + simpleRequest, + multiValidatorResponse + ); }); - it('Checks status', function(){ - const response304 = Object.assign({}, multiValidatorResponse, {status:304}); - const response200 = Object.assign({}, multiValidatorResponse, {status:200}); - assertUpdates(simpleRequest, multiValidatorResponse, simpleRequest, response304); - assert(!notModifiedResponseHeaders(simpleRequest, multiValidatorResponse, simpleRequest, response200)); + it('Checks status', function() { + const response304 = Object.assign({}, multiValidatorResponse, { + status: 304, + }); + const response200 = Object.assign({}, multiValidatorResponse, { + status: 200, + }); + assertUpdates( + simpleRequest, + multiValidatorResponse, + simpleRequest, + response304 + ); + assert( + !notModifiedResponseHeaders( + simpleRequest, + multiValidatorResponse, + simpleRequest, + response200 + ) + ); }); - it('Last-mod ignored if etag is wrong', function(){ - assert(!notModifiedResponseHeaders(simpleRequest, multiValidatorResponse, simpleRequest, withHeaders(multiValidatorResponse, {'etag':'bad'}))); - assert(!notModifiedResponseHeaders(simpleRequest, multiValidatorResponse, simpleRequest, withHeaders(multiValidatorResponse, {'etag':'W/bad'}))); + it('Last-mod ignored if etag is wrong', function() { + assert( + !notModifiedResponseHeaders( + simpleRequest, + multiValidatorResponse, + simpleRequest, + withHeaders(multiValidatorResponse, { etag: 'bad' }) + ) + ); + assert( + !notModifiedResponseHeaders( + simpleRequest, + multiValidatorResponse, + simpleRequest, + withHeaders(multiValidatorResponse, { etag: 'W/bad' }) + ) + ); }); - it('Ignored if validator is missing', function(){ - assert(!notModifiedResponseHeaders(simpleRequest, etaggedResponse, simpleRequest, cacheableResponse)); - assert(!notModifiedResponseHeaders(simpleRequest, weakTaggedResponse, simpleRequest, cacheableResponse)); - assert(!notModifiedResponseHeaders(simpleRequest, lastModifiedResponse, simpleRequest, cacheableResponse)); + it('Ignored if validator is missing', function() { + assert( + !notModifiedResponseHeaders( + simpleRequest, + etaggedResponse, + simpleRequest, + cacheableResponse + ) + ); + assert( + !notModifiedResponseHeaders( + simpleRequest, + weakTaggedResponse, + simpleRequest, + cacheableResponse + ) + ); + assert( + !notModifiedResponseHeaders( + simpleRequest, + lastModifiedResponse, + simpleRequest, + cacheableResponse + ) + ); }); - it('Skips update of content-length', function(){ - const etaggedResponseWithLenght1 = withHeaders(etaggedResponse, {'content-length':1}); - const etaggedResponseWithLenght2 = withHeaders(etaggedResponse, {'content-length':2}); - const headers = notModifiedResponseHeaders(simpleRequest, etaggedResponseWithLenght1, simpleRequest, etaggedResponseWithLenght2); + it('Skips update of content-length', function() { + const etaggedResponseWithLenght1 = withHeaders(etaggedResponse, { + 'content-length': 1, + }); + const etaggedResponseWithLenght2 = withHeaders(etaggedResponse, { + 'content-length': 2, + }); + const headers = notModifiedResponseHeaders( + simpleRequest, + etaggedResponseWithLenght1, + simpleRequest, + etaggedResponseWithLenght2 + ); assert.equal(1, headers['content-length']); }); - it('Ignored if validator is different', function(){ - assert(!notModifiedResponseHeaders(simpleRequest, lastModifiedResponse, simpleRequest, etaggedResponse)); - assert(!notModifiedResponseHeaders(simpleRequest, lastModifiedResponse, simpleRequest, weakTaggedResponse)); - assert(!notModifiedResponseHeaders(simpleRequest, etaggedResponse, simpleRequest, lastModifiedResponse)); + it('Ignored if validator is different', function() { + assert( + !notModifiedResponseHeaders( + simpleRequest, + lastModifiedResponse, + simpleRequest, + etaggedResponse + ) + ); + assert( + !notModifiedResponseHeaders( + simpleRequest, + lastModifiedResponse, + simpleRequest, + weakTaggedResponse + ) + ); + assert( + !notModifiedResponseHeaders( + simpleRequest, + etaggedResponse, + simpleRequest, + lastModifiedResponse + ) + ); }); - it('Ignored if validator doesn\'t match', function(){ - assert(!notModifiedResponseHeaders(simpleRequest, etaggedResponse, simpleRequest, withHeaders(etaggedResponse, {etag:'"other"'})), "bad etag"); - assert(!notModifiedResponseHeaders(simpleRequest, lastModifiedResponse, simpleRequest, withHeaders(lastModifiedResponse, {'last-modified':'dunno'})), "bad lastmod"); + it("Ignored if validator doesn't match", function() { + assert( + !notModifiedResponseHeaders( + simpleRequest, + etaggedResponse, + simpleRequest, + withHeaders(etaggedResponse, { etag: '"other"' }) + ), + 'bad etag' + ); + assert( + !notModifiedResponseHeaders( + simpleRequest, + lastModifiedResponse, + simpleRequest, + withHeaders(lastModifiedResponse, { 'last-modified': 'dunno' }) + ), + 'bad lastmod' + ); }); }); diff --git a/test/varytest.js b/test/varytest.js index 9d5cfb2..a5bfd81 100644 --- a/test/varytest.js +++ b/test/varytest.js @@ -5,71 +5,187 @@ const CachePolicy = require('..'); describe('Vary', function() { it('Basic', function() { - const policy = new CachePolicy({headers:{'weather': 'nice'}}, {headers:{'cache-control':'max-age=5','vary':'weather'}}); - - assert(policy.satisfiesWithoutRevalidation({headers:{'weather': 'nice'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'weather': 'bad'}})); + const policy = new CachePolicy( + { headers: { weather: 'nice' } }, + { headers: { 'cache-control': 'max-age=5', vary: 'weather' } } + ); + + assert( + policy.satisfiesWithoutRevalidation({ + headers: { weather: 'nice' }, + }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { weather: 'bad' }, + }) + ); }); it("* doesn't match", function() { - const policy = new CachePolicy({headers:{'weather': 'ok'}}, {headers:{'cache-control':'max-age=5','vary':'*'}}); - - assert(!policy.satisfiesWithoutRevalidation({headers:{'weather': 'ok'}})); + const policy = new CachePolicy( + { headers: { weather: 'ok' } }, + { headers: { 'cache-control': 'max-age=5', vary: '*' } } + ); + + assert( + !policy.satisfiesWithoutRevalidation({ headers: { weather: 'ok' } }) + ); }); - it("* is stale", function() { - const policy1 = new CachePolicy({headers:{'weather': 'ok'}}, {headers:{'cache-control':'public,max-age=99', 'vary':'*'}}); - const policy2 = new CachePolicy({headers:{'weather': 'ok'}}, {headers:{'cache-control':'public,max-age=99', 'vary':'weather'}}); + it('* is stale', function() { + const policy1 = new CachePolicy( + { headers: { weather: 'ok' } }, + { headers: { 'cache-control': 'public,max-age=99', vary: '*' } } + ); + const policy2 = new CachePolicy( + { headers: { weather: 'ok' } }, + { + headers: { + 'cache-control': 'public,max-age=99', + vary: 'weather', + }, + } + ); assert(policy1.stale()); assert(!policy2.stale()); }); it('Values are case-sensitive', function() { - const policy = new CachePolicy({headers:{'weather': 'BAD'}}, {headers:{'cache-control':'max-age=5','vary':'Weather'}}); - - assert(policy.satisfiesWithoutRevalidation({headers:{'weather': 'BAD'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'weather': 'bad'}})); + const policy = new CachePolicy( + { headers: { weather: 'BAD' } }, + { headers: { 'cache-control': 'max-age=5', vary: 'Weather' } } + ); + + assert( + policy.satisfiesWithoutRevalidation({ headers: { weather: 'BAD' } }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { weather: 'bad' }, + }) + ); }); it('Irrelevant headers ignored', function() { - const policy = new CachePolicy({headers:{'weather': 'nice'}}, {headers:{'cache-control':'max-age=5','vary':'moon-phase'}}); - - assert(policy.satisfiesWithoutRevalidation({headers:{'weather': 'bad'}})); - assert(policy.satisfiesWithoutRevalidation({headers:{'sun': 'shining'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'moon-phase': 'full'}})); + const policy = new CachePolicy( + { headers: { weather: 'nice' } }, + { headers: { 'cache-control': 'max-age=5', vary: 'moon-phase' } } + ); + + assert( + policy.satisfiesWithoutRevalidation({ headers: { weather: 'bad' } }) + ); + assert( + policy.satisfiesWithoutRevalidation({ headers: { sun: 'shining' } }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { 'moon-phase': 'full' }, + }) + ); }); it('Absence is meaningful', function() { - const policy = new CachePolicy({headers:{'weather': 'nice'}}, {headers:{'cache-control':'max-age=5','vary':'moon-phase, weather'}}); - - assert(policy.satisfiesWithoutRevalidation({headers:{'weather': 'nice'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'weather': 'nice', 'moon-phase': ''}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{}})); + const policy = new CachePolicy( + { headers: { weather: 'nice' } }, + { + headers: { + 'cache-control': 'max-age=5', + vary: 'moon-phase, weather', + }, + } + ); + + assert( + policy.satisfiesWithoutRevalidation({ + headers: { weather: 'nice' }, + }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { weather: 'nice', 'moon-phase': '' }, + }) + ); + assert(!policy.satisfiesWithoutRevalidation({ headers: {} })); }); it('All values must match', function() { - const policy = new CachePolicy({headers:{'sun': 'shining', 'weather': 'nice'}}, {headers:{'cache-control':'max-age=5','vary':'weather, sun'}}); - - assert(policy.satisfiesWithoutRevalidation({headers:{'sun': 'shining', 'weather': 'nice'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'sun': 'shining', 'weather': 'bad'}})); + const policy = new CachePolicy( + { headers: { sun: 'shining', weather: 'nice' } }, + { headers: { 'cache-control': 'max-age=5', vary: 'weather, sun' } } + ); + + assert( + policy.satisfiesWithoutRevalidation({ + headers: { sun: 'shining', weather: 'nice' }, + }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { sun: 'shining', weather: 'bad' }, + }) + ); }); it('Whitespace is OK', function() { - const policy = new CachePolicy({headers:{'sun': 'shining', 'weather': 'nice'}}, {headers:{'cache-control':'max-age=5','vary':' weather , sun '}}); - - assert(policy.satisfiesWithoutRevalidation({headers:{'sun': 'shining', 'weather': 'nice'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'weather': 'nice'}})); - assert(!policy.satisfiesWithoutRevalidation({headers:{'sun': 'shining'}})); + const policy = new CachePolicy( + { headers: { sun: 'shining', weather: 'nice' } }, + { + headers: { + 'cache-control': 'max-age=5', + vary: ' weather , sun ', + }, + } + ); + + assert( + policy.satisfiesWithoutRevalidation({ + headers: { sun: 'shining', weather: 'nice' }, + }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { weather: 'nice' }, + }) + ); + assert( + !policy.satisfiesWithoutRevalidation({ + headers: { sun: 'shining' }, + }) + ); }); it('Order is irrelevant', function() { - const policy1 = new CachePolicy({headers:{'sun': 'shining', 'weather': 'nice'}}, {headers:{'cache-control':'max-age=5','vary':'weather, sun'}}); - const policy2 = new CachePolicy({headers:{'sun': 'shining', 'weather': 'nice'}}, {headers:{'cache-control':'max-age=5','vary':'sun, weather'}}); - - assert(policy1.satisfiesWithoutRevalidation({headers:{'weather': 'nice', 'sun': 'shining'}})); - assert(policy1.satisfiesWithoutRevalidation({headers:{'sun': 'shining', 'weather': 'nice'}})); - assert(policy2.satisfiesWithoutRevalidation({headers:{'weather': 'nice', 'sun': 'shining'}})); - assert(policy2.satisfiesWithoutRevalidation({headers:{'sun': 'shining', 'weather': 'nice'}})); + const policy1 = new CachePolicy( + { headers: { sun: 'shining', weather: 'nice' } }, + { headers: { 'cache-control': 'max-age=5', vary: 'weather, sun' } } + ); + const policy2 = new CachePolicy( + { headers: { sun: 'shining', weather: 'nice' } }, + { headers: { 'cache-control': 'max-age=5', vary: 'sun, weather' } } + ); + + assert( + policy1.satisfiesWithoutRevalidation({ + headers: { weather: 'nice', sun: 'shining' }, + }) + ); + assert( + policy1.satisfiesWithoutRevalidation({ + headers: { sun: 'shining', weather: 'nice' }, + }) + ); + assert( + policy2.satisfiesWithoutRevalidation({ + headers: { weather: 'nice', sun: 'shining' }, + }) + ); + assert( + policy2.satisfiesWithoutRevalidation({ + headers: { sun: 'shining', weather: 'nice' }, + }) + ); }); });