fix: add contentType send option

README.md

@@ -156,6 +156,7 @@ The following options are also supported and will be passed directly to the
 [`@fastify/send`](https://www.npmjs.com/package/@fastify/send) module:
 
 - [`acceptRanges`](https://www.npmjs.com/package/@fastify/send#acceptranges)
+- [`contentType`](https://www.npmjs.com/package/@fastify/send#contenttype)
 - [`cacheControl`](https://www.npmjs.com/package/@fastify/send#cachecontrol) (Enable or disable setting Cache-Control response header, defaults to true. **Important:** If you want to provide a custom Cache-Control response header, this option must be false.)
 - [`dotfiles`](https://www.npmjs.com/package/@fastify/send#dotfiles)
 - [`etag`](https://www.npmjs.com/package/@fastify/send#etag)

index.js

@@ -38,6 +38,7 @@ async function fastifyStatic (fastify, opts) {
   const sendOptions = {
     root: opts.root,
     acceptRanges: opts.acceptRanges,
+    contentType: opts.contentType,
     cacheControl: opts.cacheControl,
     dotfiles: opts.dotfiles,
     etag: opts.etag,

package.json

@@ -30,7 +30,7 @@
   "homepage": "https://github.com/fastify/fastify-static",
   "dependencies": {
     "@fastify/accept-negotiator": "^2.0.0",
-    "@fastify/send": "^3.1.0",
+    "@fastify/send": "^3.2.0",
     "content-disposition": "^0.5.4",
     "fastify-plugin": "^5.0.0",
     "fastq": "^1.17.1",

test/static.test.js

@@ -1377,10 +1377,11 @@ t.test('root not found warning', (t) => {
 })
 
 t.test('send options', (t) => {
-  t.plan(11)
+  t.plan(12)
   const pluginOptions = {
     root: path.join(__dirname, '/static'),
     acceptRanges: 'acceptRanges',
+    contentType: 'contentType',
     cacheControl: 'cacheControl',
     dotfiles: 'dotfiles',
     etag: 'etag',
@@ -1396,6 +1397,7 @@ t.test('send options', (t) => {
       t.equal(pathName, '/index.html')
       t.equal(options.root, path.join(__dirname, '/static'))
       t.equal(options.acceptRanges, 'acceptRanges')
+      t.equal(options.contentType, 'contentType')
       t.equal(options.cacheControl, 'cacheControl')
       t.equal(options.dotfiles, 'dotfiles')
       t.equal(options.etag, 'etag')
@@ -4061,3 +4063,42 @@ t.test('respect the .code when using with sendFile', t => {
     })
   })
 })
+
+t.test('respect the .type when using with sendFile with contentType disabled', t => {
+  t.plan(6)
+
+  const pluginOptions = {
+    root: path.join(__dirname, '/static'),
+    contentType: false
+  }
+  const fastify = Fastify()
+
+  fastify.register(fastifyStatic, pluginOptions)
+
+  fastify.get('/custom', (_, reply) => {
+    return reply.type('text/html; charset=windows-1252').sendFile('foo.html')
+  })
+
+  t.teardown(fastify.close.bind(fastify))
+
+  fastify.listen({ port: 0 }, err => {
+    t.error(err)
+
+    fastify.server.unref()
+
+    const file = fs.readFileSync(path.join(__dirname, '/static/foo.html'))
+    const contentLength = Buffer.byteLength(file).toString()
+
+    simple.concat({
+      method: 'GET',
+      url: 'http://localhost:' + fastify.server.address().port + '/custom',
+      followRedirect: false
+    }, (err, response, body) => {
+      t.error(err)
+      t.equal(response.statusCode, 200)
+      t.equal(response.headers['content-type'], 'text/html; charset=windows-1252')
+      t.equal(response.headers['content-length'], contentLength)
+      t.equal(body.toString(), fooContent)
+    })
+  })
+})

types/index.d.ts

@@ -72,6 +72,7 @@ declare namespace fastifyStatic {
   // Passed on to `send`
   export interface SendOptions {
     acceptRanges?: boolean;
+    contentType?: boolean;
     cacheControl?: boolean;
     dotfiles?: 'allow' | 'deny' | 'ignore';
     etag?: boolean;
@@ -103,6 +104,7 @@ declare namespace fastifyStatic {
 
     // Passed on to `send`
     acceptRanges?: boolean;
+    contentType?: boolean;
     cacheControl?: boolean;
     dotfiles?: 'allow' | 'deny' | 'ignore';
     etag?: boolean;

types/index.test-d.ts

@@ -34,6 +34,7 @@ expectType<any>(fastifyStaticCjs)
 const appWithImplicitHttp = fastify()
 const options: FastifyStaticOptions = {
   acceptRanges: true,
+  contentType: true,
   cacheControl: true,
   decorateReply: true,
   dotfiles: 'allow',
@@ -145,6 +146,10 @@ appWithHttp2
     appWithHttp2.get('/download/2', (request, reply) => {
       reply.download('some-file-name', 'some-filename', { cacheControl: false, acceptRanges: true })
     })
+
+    appWithHttp2.get('/download/3', (request, reply) => {
+      reply.download('some-file-name', 'some-filename', { contentType: false })
+    })
   })
 
 const multiRootAppWithImplicitHttp = fastify()
@@ -165,6 +170,10 @@ multiRootAppWithImplicitHttp
       reply.sendFile('some-file-name', 'some-root-name', { cacheControl: false, acceptRanges: true })
     })
 
+    multiRootAppWithImplicitHttp.get('/', (request, reply) => {
+      reply.sendFile('some-file-name', 'some-root-name-2', { contentType: false })
+    })
+
     multiRootAppWithImplicitHttp.get('/download', (request, reply) => {
       reply.download('some-file-name')
     })
@@ -176,6 +185,10 @@ multiRootAppWithImplicitHttp
     multiRootAppWithImplicitHttp.get('/download/2', (request, reply) => {
       reply.download('some-file-name', 'some-filename', { cacheControl: false, acceptRanges: true })
     })
+
+    multiRootAppWithImplicitHttp.get('/download/3', (request, reply) => {
+      reply.download('some-file-name', 'some-filename', { contentType: false })
+    })
   })
 
 const noIndexApp = fastify()