From 96694638aa10aaa40eeae4271d1a933baec9fe13 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Fri, 16 Oct 2020 14:46:29 +0200
Subject: [PATCH 01/20] chore: Ignore .mypy_cache y .pytest cache.

---
 .gitignore | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.gitignore b/.gitignore
index b6e4761..b664610 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,6 +25,8 @@ share/python-wheels/
 *.egg-info/
 .installed.cfg
 *.egg
+.mypy_cache
+.pytest_cache
 MANIFEST
 
 # PyInstaller

From 6c44e16f03ef4286fec3b9fa8941c39b497dd401 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Fri, 16 Oct 2020 14:52:35 +0200
Subject: [PATCH 02/20] chore(chat): empty module

---
 src/app/chat/__init__.py | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 src/app/chat/__init__.py

diff --git a/src/app/chat/__init__.py b/src/app/chat/__init__.py
new file mode 100644
index 0000000..e69de29

From 52fe9868db71cab0cfddb298673b4ddf9c90cee6 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Sat, 17 Oct 2020 14:54:04 +0200
Subject: [PATCH 03/20] feat(basic-chat): small functional demo.

---
 Pipfile                     |   4 +-
 Pipfile.lock                | 123 ++++++++++++++++++++++++++++++++++--
 src/app/chat.html           |  39 ++++++++++++
 src/app/chat/__init__.py    |   0
 src/app/main.py             |  29 +++++++++
 src/app/static/socket.io.js |   9 +++
 6 files changed, 199 insertions(+), 5 deletions(-)
 create mode 100644 src/app/chat.html
 delete mode 100644 src/app/chat/__init__.py
 create mode 100644 src/app/static/socket.io.js

diff --git a/Pipfile b/Pipfile
index d717390..6a700c5 100644
--- a/Pipfile
+++ b/Pipfile
@@ -11,8 +11,10 @@ flake8 = "*"
 pytest-cov = "*"
 mypy = "*"
 requests = "*"
-uvicorn = "*"
+uvicorn = {extras = ["standard"], version = "*"}
 flake8-junit-report = "*"
+python-socketio = "*"
+aiofiles = "*"
 
 [requires]
 python_version = "3.7"
diff --git a/Pipfile.lock b/Pipfile.lock
index 3a4f2da..7a9ea4b 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "f42db2ac0d3636f99be49d7f223456457f188b7761c60f5ad3e74c5ce6c92936"
+            "sha256": "74228d22913a3277bf3a1f1c8d1f05fb0d5f207c823bd23a11c6492275a8a7d0"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -16,6 +16,14 @@
         ]
     },
     "default": {
+        "aiofiles": {
+            "hashes": [
+                "sha256:377fdf7815cc611870c59cbd07b68b180841d2a2b79812d8c218be02448c2acb",
+                "sha256:98e6bcfd1b50f97db4980e182ddd509b7cc35909e903a8fe50d8849e02d815af"
+            ],
+            "index": "pypi",
+            "version": "==0.5.0"
+        },
         "attrs": {
             "hashes": [
                 "sha256:26b54ddbbb9ee1d34d5d3668dd37d6cf74990ab23c828c2888dccdceee395594",
@@ -116,6 +124,23 @@
             ],
             "version": "==0.11.0"
         },
+        "httptools": {
+            "hashes": [
+                "sha256:0a4b1b2012b28e68306575ad14ad5e9120b34fccd02a81eb08838d7e3bbb48be",
+                "sha256:3592e854424ec94bd17dc3e0c96a64e459ec4147e6d53c0a42d0ebcef9cb9c5d",
+                "sha256:41b573cf33f64a8f8f3400d0a7faf48e1888582b6f6e02b82b9bd4f0bf7497ce",
+                "sha256:56b6393c6ac7abe632f2294da53f30d279130a92e8ae39d8d14ee2e1b05ad1f2",
+                "sha256:86c6acd66765a934e8730bf0e9dfaac6fdcf2a4334212bd4a0a1c78f16475ca6",
+                "sha256:96da81e1992be8ac2fd5597bf0283d832287e20cb3cfde8996d2b00356d4e17f",
+                "sha256:96eb359252aeed57ea5c7b3d79839aaa0382c9d3149f7d24dd7172b1bcecb009",
+                "sha256:a2719e1d7a84bb131c4f1e0cb79705034b48de6ae486eb5297a139d6a3296dce",
+                "sha256:ac0aa11e99454b6a66989aa2d44bca41d4e0f968e395a0a8f164b401fefe359a",
+                "sha256:bc3114b9edbca5a1eb7ae7db698c669eb53eb8afbbebdde116c174925260849c",
+                "sha256:fa3cd71e31436911a44620473e873a256851e1f53dee56669dae403ba41756a4",
+                "sha256:fea04e126014169384dee76a153d4573d90d0cbd1d12185da089f73c78390437"
+            ],
+            "version": "==0.1.1"
+        },
         "idna": {
             "hashes": [
                 "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6",
@@ -134,6 +159,7 @@
         },
         "iniconfig": {
             "hashes": [
+                "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3",
                 "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"
             ],
             "version": "==1.1.1"
@@ -259,6 +285,44 @@
             "index": "pypi",
             "version": "==2.10.1"
         },
+        "python-dotenv": {
+            "hashes": [
+                "sha256:8c10c99a1b25d9a68058a1ad6f90381a62ba68230ca93966882a4dbc3bc9c33d",
+                "sha256:c10863aee750ad720f4f43436565e4c1698798d763b63234fb5021b6c616e423"
+            ],
+            "version": "==0.14.0"
+        },
+        "python-engineio": {
+            "hashes": [
+                "sha256:36b33c6aa702d9b6a7f527eec6387a2da1a9a24484ec2f086d76576413cef04b",
+                "sha256:cfded18156862f94544a9f8ef37f56727df731c8552d7023f5afee8369be2db6"
+            ],
+            "version": "==3.13.2"
+        },
+        "python-socketio": {
+            "hashes": [
+                "sha256:358d8fbbc029c4538ea25bcaa283e47f375be0017fcba829de8a3a731c9df25a",
+                "sha256:d437f797c44b6efba2f201867cf02b8c96b97dff26d4e4281ac08b45817cd522"
+            ],
+            "index": "pypi",
+            "version": "==4.6.0"
+        },
+        "pyyaml": {
+            "hashes": [
+                "sha256:06a0d7ba600ce0b2d2fe2e78453a470b5a6e000a985dd4a4e54e436cc36b0e97",
+                "sha256:240097ff019d7c70a4922b6869d8a86407758333f02203e0fc6ff79c5dcede76",
+                "sha256:4f4b913ca1a7319b33cfb1369e91e50354d6f07a135f3b901aca02aa95940bd2",
+                "sha256:69f00dca373f240f842b2931fb2c7e14ddbacd1397d57157a9b005a6a9942648",
+                "sha256:73f099454b799e05e5ab51423c7bcf361c58d3206fa7b0d555426b1f4d9a3eaf",
+                "sha256:74809a57b329d6cc0fdccee6318f44b9b8649961fa73144a98735b0aaf029f1f",
+                "sha256:7739fc0fa8205b3ee8808aea45e968bc90082c10aef6ea95e855e10abf4a37b2",
+                "sha256:95f71d2af0ff4227885f7a6605c37fd53d3a106fcab511b8860ecca9fcf400ee",
+                "sha256:b8eac752c5e14d3eca0e6dd9199cd627518cb5ec06add0de9d32baeee6fe645d",
+                "sha256:cc8955cfbfc7a115fa81d85284ee61147059a753344bc51098f3ccd69b0d7e0c",
+                "sha256:d13155f591e6fcc1ec3b30685d50bf0711574e2c0dfffd7644babf8b5102ca1a"
+            ],
+            "version": "==5.3.1"
+        },
         "requests": {
             "hashes": [
                 "sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b",
@@ -334,6 +398,9 @@
             "version": "==1.25.10"
         },
         "uvicorn": {
+            "extras": [
+                "standard"
+            ],
             "hashes": [
                 "sha256:a461e76406088f448f36323f5ac774d50e5a552b6ccb54e4fca8d83ef614a7c2",
                 "sha256:d06a25caa8dc680ad92eb3ec67363f5281c092059613a1cc0100acba37fc0f45"
@@ -341,13 +408,61 @@
             "index": "pypi",
             "version": "==0.12.1"
         },
+        "uvloop": {
+            "hashes": [
+                "sha256:08b109f0213af392150e2fe6f81d33261bb5ce968a288eb698aad4f46eb711bd",
+                "sha256:123ac9c0c7dd71464f58f1b4ee0bbd81285d96cdda8bc3519281b8973e3a461e",
+                "sha256:4315d2ec3ca393dd5bc0b0089d23101276778c304d42faff5dc4579cb6caef09",
+                "sha256:4544dcf77d74f3a84f03dd6278174575c44c67d7165d4c42c71db3fdc3860726",
+                "sha256:afd5513c0ae414ec71d24f6f123614a80f3d27ca655a4fcf6cabe50994cc1891",
+                "sha256:b4f591aa4b3fa7f32fb51e2ee9fea1b495eb75b0b3c8d0ca52514ad675ae63f7",
+                "sha256:bcac356d62edd330080aed082e78d4b580ff260a677508718f88016333e2c9c5",
+                "sha256:e7514d7a48c063226b7d06617cbb12a14278d4323a065a8d46a7962686ce2e95",
+                "sha256:f07909cd9fc08c52d294b1570bba92186181ca01fe3dc9ffba68955273dd7362"
+            ],
+            "version": "==0.14.0"
+        },
+        "watchgod": {
+            "hashes": [
+                "sha256:59700dab7445aa8e6067a5b94f37bae90fc367554549b1ed2e9d0f4f38a90d2a",
+                "sha256:e9cca0ab9c63f17fc85df9fd8bd18156ff00aff04ebe5976cee473f4968c6858"
+            ],
+            "version": "==0.6"
+        },
+        "websockets": {
+            "hashes": [
+                "sha256:0e4fb4de42701340bd2353bb2eee45314651caa6ccee80dbd5f5d5978888fed5",
+                "sha256:1d3f1bf059d04a4e0eb4985a887d49195e15ebabc42364f4eb564b1d065793f5",
+                "sha256:20891f0dddade307ffddf593c733a3fdb6b83e6f9eef85908113e628fa5a8308",
+                "sha256:295359a2cc78736737dd88c343cd0747546b2174b5e1adc223824bcaf3e164cb",
+                "sha256:2db62a9142e88535038a6bcfea70ef9447696ea77891aebb730a333a51ed559a",
+                "sha256:3762791ab8b38948f0c4d281c8b2ddfa99b7e510e46bd8dfa942a5fff621068c",
+                "sha256:3db87421956f1b0779a7564915875ba774295cc86e81bc671631379371af1170",
+                "sha256:3ef56fcc7b1ff90de46ccd5a687bbd13a3180132268c4254fc0fa44ecf4fc422",
+                "sha256:4f9f7d28ce1d8f1295717c2c25b732c2bc0645db3215cf757551c392177d7cb8",
+                "sha256:5c01fd846263a75bc8a2b9542606927cfad57e7282965d96b93c387622487485",
+                "sha256:5c65d2da8c6bce0fca2528f69f44b2f977e06954c8512a952222cea50dad430f",
+                "sha256:751a556205d8245ff94aeef23546a1113b1dd4f6e4d102ded66c39b99c2ce6c8",
+                "sha256:7ff46d441db78241f4c6c27b3868c9ae71473fe03341340d2dfdbe8d79310acc",
+                "sha256:965889d9f0e2a75edd81a07592d0ced54daa5b0785f57dc429c378edbcffe779",
+                "sha256:9b248ba3dd8a03b1a10b19efe7d4f7fa41d158fdaa95e2cf65af5a7b95a4f989",
+                "sha256:9bef37ee224e104a413f0780e29adb3e514a5b698aabe0d969a6ba426b8435d1",
+                "sha256:c1ec8db4fac31850286b7cd3b9c0e1b944204668b8eb721674916d4e28744092",
+                "sha256:c8a116feafdb1f84607cb3b14aa1418424ae71fee131642fc568d21423b51824",
+                "sha256:ce85b06a10fc65e6143518b96d3dca27b081a740bae261c2fb20375801a9d56d",
+                "sha256:d705f8aeecdf3262379644e4b55107a3b55860eb812b673b28d0fbc347a60c55",
+                "sha256:e898a0863421650f0bebac8ba40840fc02258ef4714cb7e1fd76b6a6354bda36",
+                "sha256:f8a7bff6e8664afc4e6c28b983845c5bc14965030e3fb98789734d416af77c4b"
+            ],
+            "version": "==8.1"
+        },
         "zipp": {
             "hashes": [
-                "sha256:64ad89efee774d1897a58607895d80789c59778ea02185dd846ac38394a8642b",
-                "sha256:eed8ec0b8d1416b2ca33516a37a08892442f3954dee131e92cfd92d8fe3e7066"
+                "sha256:16522f69653f0d67be90e8baa4a46d66389145b734345d68a257da53df670903",
+                "sha256:c1532a8030c32fd52ff6a288d855fe7adef5823ba1d26a29a68fd6314aa72baa"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==3.3.0"
+            "version": "==3.3.1"
         }
     },
     "develop": {}
diff --git a/src/app/chat.html b/src/app/chat.html
new file mode 100644
index 0000000..ae075c8
--- /dev/null
+++ b/src/app/chat.html
@@ -0,0 +1,39 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Socket.IO chat</title>
+    <style>
+      * { margin: 0; padding: 0; box-sizing: border-box; }
+      body { font: 13px Helvetica, Arial; }
+      form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
+      form input { border: 0; padding: 10px; width: 90%; margin-right: 0.5%; }
+      form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
+      #messages { list-style-type: none; margin: 0; padding: 0; }
+      #messages li { padding: 5px 10px; }
+      #messages li:nth-child(odd) { background: #eee; }
+    </style>
+  </head>
+  <body>
+    <h1>Socket.IO chat</h1>
+    <ul id="messages"></ul>
+    <form action="">
+      <input id="m" autocomplete="off" /><button>Send</button>
+    </form>
+    <script src="/static/socket.io.js"></script>
+    <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
+    <script>
+      $(function () {
+        var socket = io({ path: "/sio/socket.io" });
+        $('form').submit(function(e) {
+          e.preventDefault(); // prevents page reloading
+          socket.emit('chat message', $('#m').val());
+          $('#m').val('');
+          return false;
+        });
+        socket.on('chat message', function(msg){
+          $('#messages').append($('<li>').text(msg));
+        });
+      });
+    </script>
+  </body>
+</html>
diff --git a/src/app/chat/__init__.py b/src/app/chat/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/src/app/main.py b/src/app/main.py
index cc89408..31dffb8 100644
--- a/src/app/main.py
+++ b/src/app/main.py
@@ -1,6 +1,30 @@
+import socketio
+
 from fastapi import FastAPI
+from fastapi.responses import FileResponse, HTMLResponse
+from fastapi.staticfiles import StaticFiles
 
 app = FastAPI()
+app.mount("/static", StaticFiles(directory="static"), name="static")
+
+sio = socketio.AsyncServer(async_mode='asgi')
+app.mount('/sio', socketio.ASGIApp(sio))
+
+
+@sio.on('connect')
+def sio_connect(sid, environ):
+    print('A user connected')
+
+
+@sio.on('disconnect')
+def sio_disconnect(sid):
+    print('User disconnected')
+
+
+@sio.on('chat message')
+async def chat_message(sid, msg):
+    print('Message: %s' % msg)
+    await sio.emit('chat message', msg)
 
 
 @app.get("/")
@@ -11,3 +35,8 @@ async def home() -> dict:
         'message': "Hello world",
         'version': "0.1",
     }
+
+
+@app.get("/chat", response_class=FileResponse)
+def chat() -> HTMLResponse:
+    return FileResponse('chat.html')
diff --git a/src/app/static/socket.io.js b/src/app/static/socket.io.js
new file mode 100644
index 0000000..270777b
--- /dev/null
+++ b/src/app/static/socket.io.js
@@ -0,0 +1,9 @@
+/*!
+ * Socket.IO v2.3.0
+ * (c) 2014-2019 Guillermo Rauch
+ * Released under the MIT License.
+ */
+!function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.io=e():t.io=e()}(this,function(){return function(t){function e(r){if(n[r])return n[r].exports;var o=n[r]={exports:{},id:r,loaded:!1};return t[r].call(o.exports,o,o.exports,e),o.loaded=!0,o.exports}var n={};return e.m=t,e.c=n,e.p="",e(0)}([function(t,e,n){function r(t,e){"object"==typeof t&&(e=t,t=void 0),e=e||{};var n,r=o(t),i=r.source,u=r.id,p=r.path,h=c[u]&&p in c[u].nsps,f=e.forceNew||e["force new connection"]||!1===e.multiplex||h;return f?(a("ignoring socket cache for %s",i),n=s(i,e)):(c[u]||(a("new io instance for %s",i),c[u]=s(i,e)),n=c[u]),r.query&&!e.query&&(e.query=r.query),n.socket(r.path,e)}var o=n(1),i=n(7),s=n(15),a=n(3)("socket.io-client");t.exports=e=r;var c=e.managers={};e.protocol=i.protocol,e.connect=r,e.Manager=n(15),e.Socket=n(39)},function(t,e,n){function r(t,e){var n=t;e=e||"undefined"!=typeof location&&location,null==t&&(t=e.protocol+"//"+e.host),"string"==typeof t&&("/"===t.charAt(0)&&(t="/"===t.charAt(1)?e.protocol+t:e.host+t),/^(https?|wss?):\/\//.test(t)||(i("protocol-less url %s",t),t="undefined"!=typeof e?e.protocol+"//"+t:"https://"+t),i("parse %s",t),n=o(t)),n.port||(/^(http|ws)$/.test(n.protocol)?n.port="80":/^(http|ws)s$/.test(n.protocol)&&(n.port="443")),n.path=n.path||"/";var r=n.host.indexOf(":")!==-1,s=r?"["+n.host+"]":n.host;return n.id=n.protocol+"://"+s+":"+n.port,n.href=n.protocol+"://"+s+(e&&e.port===n.port?"":":"+n.port),n}var o=n(2),i=n(3)("socket.io-client:url");t.exports=r},function(t,e){var 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e=[].slice.call(arguments,1),n=this._callbacks["$"+t];if(n){n=n.slice(0);for(var r=0,o=n.length;r<o;++r)n[r].apply(this,e)}return this},r.prototype.listeners=function(t){return this._callbacks=this._callbacks||{},this._callbacks["$"+t]||[]},r.prototype.hasListeners=function(t){return!!this.listeners(t).length}},function(t,e,n){function r(t,e){if(!t)return t;if(s(t)){var n={_placeholder:!0,num:e.length};return e.push(t),n}if(i(t)){for(var o=new Array(t.length),a=0;a<t.length;a++)o[a]=r(t[a],e);return o}if("object"==typeof t&&!(t instanceof Date)){var o={};for(var c in t)o[c]=r(t[c],e);return o}return t}function o(t,e){if(!t)return t;if(t&&t._placeholder)return e[t.num];if(i(t))for(var n=0;n<t.length;n++)t[n]=o(t[n],e);else if("object"==typeof t)for(var r in t)t[r]=o(t[r],e);return t}var i=n(13),s=n(14),a=Object.prototype.toString,c="function"==typeof Blob||"undefined"!=typeof Blob&&"[object BlobConstructor]"===a.call(Blob),u="function"==typeof File||"undefined"!=typeof File&&"[object 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o=n(16),i=n(39),s=n(11),a=n(7),c=n(41),u=n(42),p=n(3)("socket.io-client:manager"),h=n(38),f=n(43),l=Object.prototype.hasOwnProperty;t.exports=r,r.prototype.emitAll=function(){this.emit.apply(this,arguments);for(var t in this.nsps)l.call(this.nsps,t)&&this.nsps[t].emit.apply(this.nsps[t],arguments)},r.prototype.updateSocketIds=function(){for(var t in this.nsps)l.call(this.nsps,t)&&(this.nsps[t].id=this.generateId(t))},r.prototype.generateId=function(t){return("/"===t?"":t+"#")+this.engine.id},s(r.prototype),r.prototype.reconnection=function(t){return arguments.length?(this._reconnection=!!t,this):this._reconnection},r.prototype.reconnectionAttempts=function(t){return arguments.length?(this._reconnectionAttempts=t,this):this._reconnectionAttempts},r.prototype.reconnectionDelay=function(t){return arguments.length?(this._reconnectionDelay=t,this.backoff&&this.backoff.setMin(t),this):this._reconnectionDelay},r.prototype.randomizationFactor=function(t){return arguments.length?(this._randomizationFactor=t,this.backoff&&this.backoff.setJitter(t),this):this._randomizationFactor},r.prototype.reconnectionDelayMax=function(t){return arguments.length?(this._reconnectionDelayMax=t,this.backoff&&this.backoff.setMax(t),this):this._reconnectionDelayMax},r.prototype.timeout=function(t){return arguments.length?(this._timeout=t,this):this._timeout},r.prototype.maybeReconnectOnOpen=function(){!this.reconnecting&&this._reconnection&&0===this.backoff.attempts&&this.reconnect()},r.prototype.open=r.prototype.connect=function(t,e){if(p("readyState %s",this.readyState),~this.readyState.indexOf("open"))return this;p("opening %s",this.uri),this.engine=o(this.uri,this.opts);var n=this.engine,r=this;this.readyState="opening",this.skipReconnect=!1;var i=c(n,"open",function(){r.onopen(),t&&t()}),s=c(n,"error",function(e){if(p("connect_error"),r.cleanup(),r.readyState="closed",r.emitAll("connect_error",e),t){var n=new Error("Connection error");n.data=e,t(n)}else 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Date-this.lastPing)},r.prototype.ondata=function(t){this.decoder.add(t)},r.prototype.ondecoded=function(t){this.emit("packet",t)},r.prototype.onerror=function(t){p("error",t),this.emitAll("error",t)},r.prototype.socket=function(t,e){function n(){~h(o.connecting,r)||o.connecting.push(r)}var r=this.nsps[t];if(!r){r=new i(this,t,e),this.nsps[t]=r;var o=this;r.on("connecting",n),r.on("connect",function(){r.id=o.generateId(t)}),this.autoConnect&&n()}return r},r.prototype.destroy=function(t){var e=h(this.connecting,t);~e&&this.connecting.splice(e,1),this.connecting.length||this.close()},r.prototype.packet=function(t){p("writing packet %j",t);var e=this;t.query&&0===t.type&&(t.nsp+="?"+t.query),e.encoding?e.packetBuffer.push(t):(e.encoding=!0,this.encoder.encode(t,function(n){for(var r=0;r<n.length;r++)e.engine.write(n[r],t.options);e.encoding=!1,e.processPacketQueue()}))},r.prototype.processPacketQueue=function(){if(this.packetBuffer.length>0&&!this.encoding){var t=this.packetBuffer.shift();this.packet(t)}},r.prototype.cleanup=function(){p("cleanup");for(var t=this.subs.length,e=0;e<t;e++){var n=this.subs.shift();n.destroy()}this.packetBuffer=[],this.encoding=!1,this.lastPing=null,this.decoder.destroy()},r.prototype.close=r.prototype.disconnect=function(){p("disconnect"),this.skipReconnect=!0,this.reconnecting=!1,"opening"===this.readyState&&this.cleanup(),this.backoff.reset(),this.readyState="closed",this.engine&&this.engine.close()},r.prototype.onclose=function(t){p("onclose"),this.cleanup(),this.backoff.reset(),this.readyState="closed",this.emit("close",t),this._reconnection&&!this.skipReconnect&&this.reconnect()},r.prototype.reconnect=function(){if(this.reconnecting||this.skipReconnect)return this;var t=this;if(this.backoff.attempts>=this._reconnectionAttempts)p("reconnect failed"),this.backoff.reset(),this.emitAll("reconnect_failed"),this.reconnecting=!1;else{var e=this.backoff.duration();p("will wait %dms before reconnect 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location&&"https:"===location.protocol,e.hostname&&!e.port&&(e.port=this.secure?"443":"80"),this.agent=e.agent||!1,this.hostname=e.hostname||("undefined"!=typeof location?location.hostname:"localhost"),this.port=e.port||("undefined"!=typeof location&&location.port?location.port:this.secure?443:80),this.query=e.query||{},"string"==typeof this.query&&(this.query=h.decode(this.query)),this.upgrade=!1!==e.upgrade,this.path=(e.path||"/engine.io").replace(/\/$/,"")+"/",this.forceJSONP=!!e.forceJSONP,this.jsonp=!1!==e.jsonp,this.forceBase64=!!e.forceBase64,this.enablesXDR=!!e.enablesXDR,this.withCredentials=!1!==e.withCredentials,this.timestampParam=e.timestampParam||"t",this.timestampRequests=e.timestampRequests,this.transports=e.transports||["polling","websocket"],this.transportOptions=e.transportOptions||{},this.readyState="",this.writeBuffer=[],this.prevBufferLen=0,this.policyPort=e.policyPort||843,this.rememberUpgrade=e.rememberUpgrade||!1,this.binaryType=null,this.onlyBinaryUpgrades=e.onlyBinaryUpgrades,this.perMessageDeflate=!1!==e.perMessageDeflate&&(e.perMessageDeflate||{}),!0===this.perMessageDeflate&&(this.perMessageDeflate={}),this.perMessageDeflate&&null==this.perMessageDeflate.threshold&&(this.perMessageDeflate.threshold=1024),this.pfx=e.pfx||null,this.key=e.key||null,this.passphrase=e.passphrase||null,this.cert=e.cert||null,this.ca=e.ca||null,this.ciphers=e.ciphers||null,this.rejectUnauthorized=void 0===e.rejectUnauthorized||e.rejectUnauthorized,this.forceNode=!!e.forceNode,this.isReactNative="undefined"!=typeof navigator&&"string"==typeof navigator.product&&"reactnative"===navigator.product.toLowerCase(),("undefined"==typeof self||this.isReactNative)&&(e.extraHeaders&&Object.keys(e.extraHeaders).length>0&&(this.extraHeaders=e.extraHeaders),e.localAddress&&(this.localAddress=e.localAddress)),this.id=null,this.upgrades=null,this.pingInterval=null,this.pingTimeout=null,this.pingIntervalTimer=null,this.pingTimeoutTimer=null,void this.open()):new r(t,e)}function o(t){var e={};for(var n in t)t.hasOwnProperty(n)&&(e[n]=t[n]);return e}var i=n(18),s=n(11),a=n(3)("engine.io-client:socket"),c=n(38),u=n(24),p=n(2),h=n(32);t.exports=r,r.priorWebsocketSuccess=!1,s(r.prototype),r.protocol=u.protocol,r.Socket=r,r.Transport=n(23),r.transports=n(18),r.parser=n(24),r.prototype.createTransport=function(t){a('creating transport "%s"',t);var e=o(this.query);e.EIO=u.protocol,e.transport=t;var n=this.transportOptions[t]||{};this.id&&(e.sid=this.id);var r=new i[t]({query:e,socket:this,agent:n.agent||this.agent,hostname:n.hostname||this.hostname,port:n.port||this.port,secure:n.secure||this.secure,path:n.path||this.path,forceJSONP:n.forceJSONP||this.forceJSONP,jsonp:n.jsonp||this.jsonp,forceBase64:n.forceBase64||this.forceBase64,enablesXDR:n.enablesXDR||this.enablesXDR,withCredentials:n.withCredentials||this.withCredentials,timestampRequests:n.timestampRequests||this.timestampRequests,timestampParam:n.timestampParam||this.timestampParam,policyPort:n.policyPort||this.policyPort,pfx:n.pfx||this.pfx,key:n.key||this.key,passphrase:n.passphrase||this.passphrase,cert:n.cert||this.cert,ca:n.ca||this.ca,ciphers:n.ciphers||this.ciphers,rejectUnauthorized:n.rejectUnauthorized||this.rejectUnauthorized,perMessageDeflate:n.perMessageDeflate||this.perMessageDeflate,extraHeaders:n.extraHeaders||this.extraHeaders,forceNode:n.forceNode||this.forceNode,localAddress:n.localAddress||this.localAddress,requestTimeout:n.requestTimeout||this.requestTimeout,protocols:n.protocols||void 0,isReactNative:this.isReactNative});return r},r.prototype.open=function(){var t;if(this.rememberUpgrade&&r.priorWebsocketSuccess&&this.transports.indexOf("websocket")!==-1)t="websocket";else{
+if(0===this.transports.length){var e=this;return void setTimeout(function(){e.emit("error","No transports available")},0)}t=this.transports[0]}this.readyState="opening";try{t=this.createTransport(t)}catch(n){return this.transports.shift(),void this.open()}t.open(),this.setTransport(t)},r.prototype.setTransport=function(t){a("setting transport %s",t.name);var e=this;this.transport&&(a("clearing existing transport %s",this.transport.name),this.transport.removeAllListeners()),this.transport=t,t.on("drain",function(){e.onDrain()}).on("packet",function(t){e.onPacket(t)}).on("error",function(t){e.onError(t)}).on("close",function(){e.onClose("transport close")})},r.prototype.probe=function(t){function e(){if(f.onlyBinaryUpgrades){var e=!this.supportsBinary&&f.transport.supportsBinary;h=h||e}h||(a('probe transport "%s" opened',t),p.send([{type:"ping",data:"probe"}]),p.once("packet",function(e){if(!h)if("pong"===e.type&&"probe"===e.data){if(a('probe transport "%s" pong',t),f.upgrading=!0,f.emit("upgrading",p),!p)return;r.priorWebsocketSuccess="websocket"===p.name,a('pausing current transport "%s"',f.transport.name),f.transport.pause(function(){h||"closed"!==f.readyState&&(a("changing transport and sending upgrade packet"),u(),f.setTransport(p),p.send([{type:"upgrade"}]),f.emit("upgrade",p),p=null,f.upgrading=!1,f.flush())})}else{a('probe transport "%s" failed',t);var n=new Error("probe error");n.transport=p.name,f.emit("upgradeError",n)}}))}function n(){h||(h=!0,u(),p.close(),p=null)}function o(e){var r=new Error("probe error: "+e);r.transport=p.name,n(),a('probe transport "%s" failed because of error: %s',t,e),f.emit("upgradeError",r)}function i(){o("transport closed")}function s(){o("socket closed")}function c(t){p&&t.name!==p.name&&(a('"%s" works - aborting "%s"',t.name,p.name),n())}function u(){p.removeListener("open",e),p.removeListener("error",o),p.removeListener("close",i),f.removeListener("close",s),f.removeListener("upgrading",c)}a('probing transport "%s"',t);var p=this.createTransport(t,{probe:1}),h=!1,f=this;r.priorWebsocketSuccess=!1,p.once("open",e),p.once("error",o),p.once("close",i),this.once("close",s),this.once("upgrading",c),p.open()},r.prototype.onOpen=function(){if(a("socket open"),this.readyState="open",r.priorWebsocketSuccess="websocket"===this.transport.name,this.emit("open"),this.flush(),"open"===this.readyState&&this.upgrade&&this.transport.pause){a("starting upgrade probes");for(var t=0,e=this.upgrades.length;t<e;t++)this.probe(this.upgrades[t])}},r.prototype.onPacket=function(t){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState)switch(a('socket receive: type "%s", data "%s"',t.type,t.data),this.emit("packet",t),this.emit("heartbeat"),t.type){case"open":this.onHandshake(JSON.parse(t.data));break;case"pong":this.setPing(),this.emit("pong");break;case"error":var e=new Error("server error");e.code=t.data,this.onError(e);break;case"message":this.emit("data",t.data),this.emit("message",t.data)}else a('packet received with socket readyState "%s"',this.readyState)},r.prototype.onHandshake=function(t){this.emit("handshake",t),this.id=t.sid,this.transport.query.sid=t.sid,this.upgrades=this.filterUpgrades(t.upgrades),this.pingInterval=t.pingInterval,this.pingTimeout=t.pingTimeout,this.onOpen(),"closed"!==this.readyState&&(this.setPing(),this.removeListener("heartbeat",this.onHeartbeat),this.on("heartbeat",this.onHeartbeat))},r.prototype.onHeartbeat=function(t){clearTimeout(this.pingTimeoutTimer);var e=this;e.pingTimeoutTimer=setTimeout(function(){"closed"!==e.readyState&&e.onClose("ping timeout")},t||e.pingInterval+e.pingTimeout)},r.prototype.setPing=function(){var t=this;clearTimeout(t.pingIntervalTimer),t.pingIntervalTimer=setTimeout(function(){a("writing ping packet - expecting pong within %sms",t.pingTimeout),t.ping(),t.onHeartbeat(t.pingTimeout)},t.pingInterval)},r.prototype.ping=function(){var t=this;this.sendPacket("ping",function(){t.emit("ping")})},r.prototype.onDrain=function(){this.writeBuffer.splice(0,this.prevBufferLen),this.prevBufferLen=0,0===this.writeBuffer.length?this.emit("drain"):this.flush()},r.prototype.flush=function(){"closed"!==this.readyState&&this.transport.writable&&!this.upgrading&&this.writeBuffer.length&&(a("flushing %d packets in socket",this.writeBuffer.length),this.transport.send(this.writeBuffer),this.prevBufferLen=this.writeBuffer.length,this.emit("flush"))},r.prototype.write=r.prototype.send=function(t,e,n){return this.sendPacket("message",t,e,n),this},r.prototype.sendPacket=function(t,e,n,r){if("function"==typeof e&&(r=e,e=void 0),"function"==typeof n&&(r=n,n=null),"closing"!==this.readyState&&"closed"!==this.readyState){n=n||{},n.compress=!1!==n.compress;var o={type:t,data:e,options:n};this.emit("packetCreate",o),this.writeBuffer.push(o),r&&this.once("flush",r),this.flush()}},r.prototype.close=function(){function t(){r.onClose("forced close"),a("socket closing - telling transport to close"),r.transport.close()}function e(){r.removeListener("upgrade",e),r.removeListener("upgradeError",e),t()}function n(){r.once("upgrade",e),r.once("upgradeError",e)}if("opening"===this.readyState||"open"===this.readyState){this.readyState="closing";var r=this;this.writeBuffer.length?this.once("drain",function(){this.upgrading?n():t()}):this.upgrading?n():t()}return this},r.prototype.onError=function(t){a("socket error %j",t),r.priorWebsocketSuccess=!1,this.emit("error",t),this.onClose("transport 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o=n(19),i=n(21),s=n(35),a=n(36);e.polling=r,e.websocket=a},function(t,e,n){var r=n(20);t.exports=function(t){var e=t.xdomain,n=t.xscheme,o=t.enablesXDR;try{if("undefined"!=typeof XMLHttpRequest&&(!e||r))return new XMLHttpRequest}catch(i){}try{if("undefined"!=typeof XDomainRequest&&!n&&o)return new XDomainRequest}catch(i){}if(!e)try{return new(self[["Active"].concat("Object").join("X")])("Microsoft.XMLHTTP")}catch(i){}}},function(t,e){try{t.exports="undefined"!=typeof XMLHttpRequest&&"withCredentials"in new XMLHttpRequest}catch(n){t.exports=!1}},function(t,e,n){function r(){}function o(t){if(c.call(this,t),this.requestTimeout=t.requestTimeout,this.extraHeaders=t.extraHeaders,"undefined"!=typeof location){var e="https:"===location.protocol,n=location.port;n||(n=e?443:80),this.xd="undefined"!=typeof location&&t.hostname!==location.hostname||n!==t.port,this.xs=t.secure!==e}}function 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i,s=document.createElement("form"),a=document.createElement("textarea"),c=this.iframeId="eio_iframe_"+this.index;s.className="socketio",s.style.position="absolute",s.style.top="-1000px",s.style.left="-1000px",s.target=c,s.method="POST",s.setAttribute("accept-charset","utf-8"),a.name="d",s.appendChild(a),document.body.appendChild(s),this.form=s,this.area=a}this.form.action=this.uri(),r(),t=t.replace(p,"\\\n"),this.area.value=t.replace(u,"\\n");try{this.form.submit()}catch(h){}this.iframe.attachEvent?this.iframe.onreadystatechange=function(){"complete"===o.iframe.readyState&&n()}:this.iframe.onload=n}}).call(e,function(){return this}())},function(t,e,n){function r(t){var e=t&&t.forceBase64;e&&(this.supportsBinary=!1),this.perMessageDeflate=t.perMessageDeflate,this.usingBrowserWebSocket=o&&!t.forceNode,this.protocols=t.protocols,this.usingBrowserWebSocket||(l=i),s.call(this,t)}var o,i,s=n(23),a=n(24),c=n(32),u=n(33),p=n(34),h=n(3)("engine.io-client:websocket");if("undefined"!=typeof WebSocket?o=WebSocket:"undefined"!=typeof self&&(o=self.WebSocket||self.MozWebSocket),"undefined"==typeof window)try{i=n(37)}catch(f){}var l=o||i;t.exports=r,u(r,s),r.prototype.name="websocket",r.prototype.supportsBinary=!0,r.prototype.doOpen=function(){if(this.check()){var t=this.uri(),e=this.protocols,n={agent:this.agent,perMessageDeflate:this.perMessageDeflate};n.pfx=this.pfx,n.key=this.key,n.passphrase=this.passphrase,n.cert=this.cert,n.ca=this.ca,n.ciphers=this.ciphers,n.rejectUnauthorized=this.rejectUnauthorized,this.extraHeaders&&(n.headers=this.extraHeaders),this.localAddress&&(n.localAddress=this.localAddress);try{this.ws=this.usingBrowserWebSocket&&!this.isReactNative?e?new l(t,e):new l(t):new l(t,e,n)}catch(r){return this.emit("error",r)}void 0===this.ws.binaryType&&(this.supportsBinary=!1),this.ws.supports&&this.ws.supports.binary?(this.supportsBinary=!0,this.ws.binaryType="nodebuffer"):this.ws.binaryType="arraybuffer",this.addEventListeners()}},r.prototype.addEventListeners=function(){var t=this;this.ws.onopen=function(){t.onOpen()},this.ws.onclose=function(){t.onClose()},this.ws.onmessage=function(e){t.onData(e.data)},this.ws.onerror=function(e){t.onError("websocket error",e)}},r.prototype.write=function(t){function e(){n.emit("flush"),setTimeout(function(){n.writable=!0,n.emit("drain")},0)}var n=this;this.writable=!1;for(var r=t.length,o=0,i=r;o<i;o++)!function(t){a.encodePacket(t,n.supportsBinary,function(o){if(!n.usingBrowserWebSocket){var i={};if(t.options&&(i.compress=t.options.compress),n.perMessageDeflate){var s="string"==typeof o?Buffer.byteLength(o):o.length;s<n.perMessageDeflate.threshold&&(i.compress=!1)}}try{n.usingBrowserWebSocket?n.ws.send(o):n.ws.send(o,i)}catch(a){h("websocket closed before onclose event")}--r||e()})}(t[o])},r.prototype.onClose=function(){s.prototype.onClose.call(this)},r.prototype.doClose=function(){"undefined"!=typeof this.ws&&this.ws.close()},r.prototype.uri=function(){var t=this.query||{},e=this.secure?"wss":"ws",n="";this.port&&("wss"===e&&443!==Number(this.port)||"ws"===e&&80!==Number(this.port))&&(n=":"+this.port),this.timestampRequests&&(t[this.timestampParam]=p()),this.supportsBinary||(t.b64=1),t=c.encode(t),t.length&&(t="?"+t);var r=this.hostname.indexOf(":")!==-1;return e+"://"+(r?"["+this.hostname+"]":this.hostname)+n+this.path+t},r.prototype.check=function(){return!(!l||"__initialize"in l&&this.name===r.prototype.name)}},function(t,e){},function(t,e){var n=[].indexOf;t.exports=function(t,e){if(n)return t.indexOf(e);for(var r=0;r<t.length;++r)if(t[r]===e)return r;return-1}},function(t,e,n){function r(t,e,n){this.io=t,this.nsp=e,this.json=this,this.ids=0,this.acks={},this.receiveBuffer=[],this.sendBuffer=[],this.connected=!1,this.disconnected=!0,this.flags={},n&&n.query&&(this.query=n.query),this.io.autoConnect&&this.open()}var o=n(7),i=n(11),s=n(40),a=n(41),c=n(42),u=n(3)("socket.io-client:socket"),p=n(32),h=n(26);t.exports=e=r;var f={connect:1,connect_error:1,connect_timeout:1,connecting:1,disconnect:1,error:1,reconnect:1,reconnect_attempt:1,reconnect_failed:1,reconnect_error:1,reconnecting:1,ping:1,pong:1},l=i.prototype.emit;i(r.prototype),r.prototype.subEvents=function(){if(!this.subs){var t=this.io;this.subs=[a(t,"open",c(this,"onopen")),a(t,"packet",c(this,"onpacket")),a(t,"close",c(this,"onclose"))]}},r.prototype.open=r.prototype.connect=function(){return this.connected?this:(this.subEvents(),this.io.open(),"open"===this.io.readyState&&this.onopen(),this.emit("connecting"),this)},r.prototype.send=function(){var t=s(arguments);return t.unshift("message"),this.emit.apply(this,t),this},r.prototype.emit=function(t){if(f.hasOwnProperty(t))return l.apply(this,arguments),this;var e=s(arguments),n={type:(void 0!==this.flags.binary?this.flags.binary:h(e))?o.BINARY_EVENT:o.EVENT,data:e};return n.options={},n.options.compress=!this.flags||!1!==this.flags.compress,"function"==typeof e[e.length-1]&&(u("emitting packet with ack id %d",this.ids),this.acks[this.ids]=e.pop(),n.id=this.ids++),this.connected?this.packet(n):this.sendBuffer.push(n),this.flags={},this},r.prototype.packet=function(t){t.nsp=this.nsp,this.io.packet(t)},r.prototype.onopen=function(){if(u("transport is open - connecting"),"/"!==this.nsp)if(this.query){var t="object"==typeof this.query?p.encode(this.query):this.query;u("sending connect packet with query %s",t),this.packet({type:o.CONNECT,query:t})}else this.packet({type:o.CONNECT})},r.prototype.onclose=function(t){u("close (%s)",t),this.connected=!1,this.disconnected=!0,delete this.id,this.emit("disconnect",t)},r.prototype.onpacket=function(t){var e=t.nsp===this.nsp,n=t.type===o.ERROR&&"/"===t.nsp;if(e||n)switch(t.type){case o.CONNECT:this.onconnect();break;case o.EVENT:this.onevent(t);break;case o.BINARY_EVENT:this.onevent(t);break;case o.ACK:this.onack(t);break;case o.BINARY_ACK:this.onack(t);break;case o.DISCONNECT:this.ondisconnect();break;case o.ERROR:this.emit("error",t.data)}},r.prototype.onevent=function(t){var e=t.data||[];u("emitting event %j",e),null!=t.id&&(u("attaching ack callback to event"),e.push(this.ack(t.id))),this.connected?l.apply(this,e):this.receiveBuffer.push(e)},r.prototype.ack=function(t){var e=this,n=!1;return function(){if(!n){n=!0;var r=s(arguments);u("sending ack %j",r),e.packet({type:h(r)?o.BINARY_ACK:o.ACK,id:t,data:r})}}},r.prototype.onack=function(t){var e=this.acks[t.id];"function"==typeof e?(u("calling ack %s with %j",t.id,t.data),e.apply(this,t.data),delete this.acks[t.id]):u("bad ack %s",t.id)},r.prototype.onconnect=function(){this.connected=!0,this.disconnected=!1,this.emit("connect"),this.emitBuffered()},r.prototype.emitBuffered=function(){var t;for(t=0;t<this.receiveBuffer.length;t++)l.apply(this,this.receiveBuffer[t]);for(this.receiveBuffer=[],t=0;t<this.sendBuffer.length;t++)this.packet(this.sendBuffer[t]);this.sendBuffer=[]},r.prototype.ondisconnect=function(){u("server disconnect (%s)",this.nsp),this.destroy(),this.onclose("io server disconnect")},r.prototype.destroy=function(){if(this.subs){for(var t=0;t<this.subs.length;t++)this.subs[t].destroy();this.subs=null}this.io.destroy(this)},r.prototype.close=r.prototype.disconnect=function(){return this.connected&&(u("performing disconnect (%s)",this.nsp),this.packet({type:o.DISCONNECT})),this.destroy(),this.connected&&this.onclose("io client disconnect"),this},r.prototype.compress=function(t){return this.flags.compress=t,this},r.prototype.binary=function(t){return this.flags.binary=t,this}},function(t,e){function n(t,e){var n=[];e=e||0;for(var r=e||0;r<t.length;r++)n[r-e]=t[r];return n}t.exports=n},function(t,e){function n(t,e,n){return t.on(e,n),{destroy:function(){t.removeListener(e,n)}}}t.exports=n},function(t,e){var n=[].slice;t.exports=function(t,e){if("string"==typeof e&&(e=t[e]),"function"!=typeof e)throw new Error("bind() requires a function");var r=n.call(arguments,2);return function(){return e.apply(t,r.concat(n.call(arguments)))}}},function(t,e){function n(t){t=t||{},this.ms=t.min||100,this.max=t.max||1e4,this.factor=t.factor||2,this.jitter=t.jitter>0&&t.jitter<=1?t.jitter:0,this.attempts=0}t.exports=n,n.prototype.duration=function(){var t=this.ms*Math.pow(this.factor,this.attempts++);if(this.jitter){var e=Math.random(),n=Math.floor(e*this.jitter*t);t=0==(1&Math.floor(10*e))?t-n:t+n}return 0|Math.min(t,this.max)},n.prototype.reset=function(){this.attempts=0},n.prototype.setMin=function(t){this.ms=t},n.prototype.setMax=function(t){this.max=t},n.prototype.setJitter=function(t){this.jitter=t}}])});
+//# sourceMappingURL=socket.io.js.map
\ No newline at end of file

From 8bf89d78e9a271168f6c57396de29ce56f8bc038 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Mon, 19 Oct 2020 22:09:40 +0200
Subject: [PATCH 04/20] chore(chat): docstrings, correct fileresponse.

---
 src/app/main.py | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/app/main.py b/src/app/main.py
index 31dffb8..fb03d97 100644
--- a/src/app/main.py
+++ b/src/app/main.py
@@ -1,28 +1,34 @@
+"""The FastAPI main module"""
+import os
 import socketio
 
 from fastapi import FastAPI
-from fastapi.responses import FileResponse, HTMLResponse
+from fastapi.responses import FileResponse
 from fastapi.staticfiles import StaticFiles
 
 app = FastAPI()
-app.mount("/static", StaticFiles(directory="static"), name="static")
+path = os.path.dirname(__file__)
+app.mount("/static", StaticFiles(directory=os.path.join(path, "static")), name="static")
 
 sio = socketio.AsyncServer(async_mode='asgi')
-app.mount('/sio', socketio.ASGIApp(sio))
+app.mount('/sio', socketio.ASGIApp(sio))  # socketio adds automatically /socket.io/ to the URL.
 
 
 @sio.on('connect')
 def sio_connect(sid, environ):
+    """A user / browser tab has connected"""
     print('A user connected')
 
 
 @sio.on('disconnect')
 def sio_disconnect(sid):
+    """A user / browser tab has disconnected"""
     print('User disconnected')
 
 
 @sio.on('chat message')
 async def chat_message(sid, msg):
+    """A chat message has arrived"""
     print('Message: %s' % msg)
     await sio.emit('chat message', msg)
 
@@ -38,5 +44,5 @@ async def home() -> dict:
 
 
 @app.get("/chat", response_class=FileResponse)
-def chat() -> HTMLResponse:
+def chat() -> FileResponse:
     return FileResponse('chat.html')

From 68ed3a4a0949ac94facd701f208b56d91b9eccc9 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Mon, 19 Oct 2020 22:10:59 +0200
Subject: [PATCH 05/20] chore(chat): tests with python-socketio (WIP).

---
 src/app/tests/test_chat.py | 45 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 src/app/tests/test_chat.py

diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
new file mode 100644
index 0000000..2337531
--- /dev/null
+++ b/src/app/tests/test_chat.py
@@ -0,0 +1,45 @@
+import asyncio
+import pytest
+import socketio
+import uvicorn
+
+from ..main import app
+
+PORT = 5000
+
+server = None
+server_task = None
+
+
+def get_server():
+    config = uvicorn.Config(app, host='localhost', port=PORT)
+    server = uvicorn.Server(config=config)
+    config.setup_event_loop()
+    return server
+
+
+@pytest.fixture
+async def async_get_server():
+    global server
+    global server_task
+    print("Starting server")
+    server = get_server()
+    server_task = server.serve()
+    asyncio.ensure_future(server_task)
+    asyncio.sleep(1)
+
+
+@pytest.mark.asyncio
+async def test_websocket(async_get_server):
+    sio = socketio.AsyncClient()
+
+    @sio.on('chat message')
+    def message(data):
+        print(f"Client received: {data}")
+
+    await sio.connect(f'http://localhost:{PORT}', socketio_path='/sio/socket.io/')
+    await sio.emit('chat message', 'HOLA!')
+    await sio.disconnect()
+    server.should_exit = True
+    await server_task.close()
+    asyncio.get_running_loop().stop()

From 716a98469f31f50d2f4c3646528f9dbb9da3548d Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Mon, 19 Oct 2020 22:12:44 +0200
Subject: [PATCH 06/20] test(chat): additional dependencies for chat tests.

---
 Pipfile      |   4 +-
 Pipfile.lock | 198 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 200 insertions(+), 2 deletions(-)

diff --git a/Pipfile b/Pipfile
index 6a700c5..91d2fd1 100644
--- a/Pipfile
+++ b/Pipfile
@@ -13,8 +13,10 @@ mypy = "*"
 requests = "*"
 uvicorn = {extras = ["standard"], version = "*"}
 flake8-junit-report = "*"
-python-socketio = "*"
 aiofiles = "*"
+ipdb = "*"
+python-socketio = {extras = ["asyncio_client"], version = "*"}
+pytest-asyncio = "*"
 
 [requires]
 python_version = "3.7"
diff --git a/Pipfile.lock b/Pipfile.lock
index 7a9ea4b..428eb78 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "74228d22913a3277bf3a1f1c8d1f05fb0d5f207c823bd23a11c6492275a8a7d0"
+            "sha256": "5520b3ab6976402d17ec45319b5067ecf7e137a30a06b1e5100bcf09b7e0d207"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -24,6 +24,40 @@
             "index": "pypi",
             "version": "==0.5.0"
         },
+        "aiohttp": {
+            "hashes": [
+                "sha256:1a4160579ffbc1b69e88cb6ca8bb0fbd4947dfcbf9fb1e2a4fc4c7a4a986c1fe",
+                "sha256:206c0ccfcea46e1bddc91162449c20c72f308aebdcef4977420ef329c8fcc599",
+                "sha256:2ad493de47a8f926386fa6d256832de3095ba285f325db917c7deae0b54a9fc8",
+                "sha256:319b490a5e2beaf06891f6711856ea10591cfe84fe9f3e71a721aa8f20a0872a",
+                "sha256:470e4c90da36b601676fe50c49a60d34eb8c6593780930b1aa4eea6f508dfa37",
+                "sha256:60f4caa3b7f7a477f66ccdd158e06901e1d235d572283906276e3803f6b098f5",
+                "sha256:66d64486172b032db19ea8522328b19cfb78a3e1e5b62ab6a0567f93f073dea0",
+                "sha256:687461cd974722110d1763b45c5db4d2cdee8d50f57b00c43c7590d1dd77fc5c",
+                "sha256:698cd7bc3c7d1b82bb728bae835724a486a8c376647aec336aa21a60113c3645",
+                "sha256:797456399ffeef73172945708810f3277f794965eb6ec9bd3a0c007c0476be98",
+                "sha256:a885432d3cabc1287bcf88ea94e1826d3aec57fd5da4a586afae4591b061d40d",
+                "sha256:c506853ba52e516b264b106321c424d03f3ddef2813246432fa9d1cefd361c81",
+                "sha256:fb83326d8295e8840e4ba774edf346e87eca78ba8a89c55d2690352842c15ba5"
+            ],
+            "version": "==3.6.3"
+        },
+        "appnope": {
+            "hashes": [
+                "sha256:5b26757dc6f79a3b7dc9fab95359328d5747fcb2409d331ea66d0272b90ab2a0",
+                "sha256:8b995ffe925347a2138d7ac0fe77155e4311a0ea6d6da4f5128fe4b3cbe5ed71"
+            ],
+            "markers": "sys_platform == 'darwin'",
+            "version": "==0.1.0"
+        },
+        "async-timeout": {
+            "hashes": [
+                "sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f",
+                "sha256:4291ca197d287d274d0b6cb5d6f8f8f82d434ed288f962539ff18cc9012f9ea3"
+            ],
+            "markers": "python_full_version >= '3.5.3'",
+            "version": "==3.0.1"
+        },
         "attrs": {
             "hashes": [
                 "sha256:26b54ddbbb9ee1d34d5d3668dd37d6cf74990ab23c828c2888dccdceee395594",
@@ -32,6 +66,13 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==20.2.0"
         },
+        "backcall": {
+            "hashes": [
+                "sha256:5cbdbf27be5e7cfadb448baf0aa95508f91f2bbc6c6437cd9cd06e2a4c215e1e",
+                "sha256:fbbce6a29f263178a1f7915c1940bde0ec2b2a967566fe1c65c1dfb7422bd255"
+            ],
+            "version": "==0.2.0"
+        },
         "certifi": {
             "hashes": [
                 "sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3",
@@ -94,6 +135,13 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
             "version": "==5.3"
         },
+        "decorator": {
+            "hashes": [
+                "sha256:41fa54c2a0cc4ba648be4fd43cff00aedf5b9465c9bf18d64325bc225f08f760",
+                "sha256:e3a62f0520172440ca0dcc823749319382e377f37f140a0b99ef45fecb84bfe7"
+            ],
+            "version": "==4.4.2"
+        },
         "fastapi": {
             "hashes": [
                 "sha256:61ed73b4304413a2ea618d1b95ea866ee386e0e62dd8659c4f5059286f4a39c2",
@@ -164,6 +212,36 @@
             ],
             "version": "==1.1.1"
         },
+        "ipdb": {
+            "hashes": [
+                "sha256:c85398b5fb82f82399fc38c44fe3532c0dde1754abee727d8f5cfcc74547b334"
+            ],
+            "index": "pypi",
+            "version": "==0.13.4"
+        },
+        "ipython": {
+            "hashes": [
+                "sha256:2e22c1f74477b5106a6fb301c342ab8c64bb75d702e350f05a649e8cb40a0fb8",
+                "sha256:a331e78086001931de9424940699691ad49dfb457cea31f5471eae7b78222d5e"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==7.18.1"
+        },
+        "ipython-genutils": {
+            "hashes": [
+                "sha256:72dd37233799e619666c9f639a9da83c34013a73e8bbc79a7a6348d93c61fab8",
+                "sha256:eb2e116e75ecef9d4d228fdc66af54269afa26ab4463042e33785b887c628ba8"
+            ],
+            "version": "==0.2.0"
+        },
+        "jedi": {
+            "hashes": [
+                "sha256:86ed7d9b750603e4ba582ea8edc678657fb4007894a12bcf6f4bb97892f31d20",
+                "sha256:98cc583fa0f2f8304968199b01b6b4b94f469a1f4a74c1560506ca2a211378b5"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==0.17.2"
+        },
         "mccabe": {
             "hashes": [
                 "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
@@ -171,6 +249,29 @@
             ],
             "version": "==0.6.1"
         },
+        "multidict": {
+            "hashes": [
+                "sha256:1ece5a3369835c20ed57adadc663400b5525904e53bae59ec854a5d36b39b21a",
+                "sha256:275ca32383bc5d1894b6975bb4ca6a7ff16ab76fa622967625baeebcf8079000",
+                "sha256:3750f2205b800aac4bb03b5ae48025a64e474d2c6cc79547988ba1d4122a09e2",
+                "sha256:4538273208e7294b2659b1602490f4ed3ab1c8cf9dbdd817e0e9db8e64be2507",
+                "sha256:5141c13374e6b25fe6bf092052ab55c0c03d21bd66c94a0e3ae371d3e4d865a5",
+                "sha256:51a4d210404ac61d32dada00a50ea7ba412e6ea945bbe992e4d7a595276d2ec7",
+                "sha256:5cf311a0f5ef80fe73e4f4c0f0998ec08f954a6ec72b746f3c179e37de1d210d",
+                "sha256:6513728873f4326999429a8b00fc7ceddb2509b01d5fd3f3be7881a257b8d463",
+                "sha256:7388d2ef3c55a8ba80da62ecfafa06a1c097c18032a501ffd4cabbc52d7f2b19",
+                "sha256:9456e90649005ad40558f4cf51dbb842e32807df75146c6d940b6f5abb4a78f3",
+                "sha256:c026fe9a05130e44157b98fea3ab12969e5b60691a276150db9eda71710cd10b",
+                "sha256:d14842362ed4cf63751648e7672f7174c9818459d169231d03c56e84daf90b7c",
+                "sha256:e0d072ae0f2a179c375f67e3da300b47e1a83293c554450b29c900e50afaae87",
+                "sha256:f07acae137b71af3bb548bd8da720956a3bc9f9a0b87733e0899226a2317aeb7",
+                "sha256:fbb77a75e529021e7c4a8d4e823d88ef4d23674a202be4f5addffc72cbb91430",
+                "sha256:fcfbb44c59af3f8ea984de67ec7c306f618a3ec771c2843804069917a8f2e255",
+                "sha256:feed85993dbdb1dbc29102f50bca65bdc68f2c0c8d352468c25b54874f23c39d"
+            ],
+            "markers": "python_version >= '3.5'",
+            "version": "==4.7.6"
+        },
         "mypy": {
             "hashes": [
                 "sha256:0a0d102247c16ce93c97066443d11e2d36e6cc2a32d8ccc1f705268970479324",
@@ -206,6 +307,29 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==20.4"
         },
+        "parso": {
+            "hashes": [
+                "sha256:97218d9159b2520ff45eb78028ba8b50d2bc61dcc062a9682666f2dc4bd331ea",
+                "sha256:caba44724b994a8a5e086460bb212abc5a8bc46951bf4a9a1210745953622eb9"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==0.7.1"
+        },
+        "pexpect": {
+            "hashes": [
+                "sha256:0b48a55dcb3c05f3329815901ea4fc1537514d6ba867a152b581d69ae3710937",
+                "sha256:fc65a43959d153d0114afe13997d439c22823a27cefceb5ff35c2178c6784c0c"
+            ],
+            "markers": "sys_platform != 'win32'",
+            "version": "==4.8.0"
+        },
+        "pickleshare": {
+            "hashes": [
+                "sha256:87683d47965c1da65cdacaf31c8441d12b8044cdec9aca500cd78fc2c683afca",
+                "sha256:9649af414d74d4df115d5d718f82acb59c9d418196b7b4290ed47a12ce62df56"
+            ],
+            "version": "==0.7.5"
+        },
         "pluggy": {
             "hashes": [
                 "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
@@ -214,6 +338,21 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.13.1"
         },
+        "prompt-toolkit": {
+            "hashes": [
+                "sha256:25c95d2ac813909f813c93fde734b6e44406d1477a9faef7c915ff37d39c0a8c",
+                "sha256:7debb9a521e0b1ee7d2fe96ee4bd60ef03c6492784de0547337ca4433e46aa63"
+            ],
+            "markers": "python_full_version >= '3.6.1'",
+            "version": "==3.0.8"
+        },
+        "ptyprocess": {
+            "hashes": [
+                "sha256:923f299cc5ad920c68f2bc0bc98b75b9f838b93b599941a6b63ddbc2476394c0",
+                "sha256:d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f"
+            ],
+            "version": "==0.6.0"
+        },
         "py": {
             "hashes": [
                 "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2",
@@ -261,6 +400,14 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.2.0"
         },
+        "pygments": {
+            "hashes": [
+                "sha256:307543fe65c0947b126e83dd5a61bd8acbd84abec11f43caebaf5534cbc17998",
+                "sha256:926c3f319eda178d1bd90851e4317e6d8cdb5e292a3386aac9bd75eca29cf9c7"
+            ],
+            "markers": "python_version >= '3.5'",
+            "version": "==2.7.1"
+        },
         "pyparsing": {
             "hashes": [
                 "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
@@ -277,6 +424,14 @@
             "markers": "python_version >= '3.5'",
             "version": "==6.1.1"
         },
+        "pytest-asyncio": {
+            "hashes": [
+                "sha256:2eae1e34f6c68fc0a9dc12d4bea190483843ff4708d24277c41568d6b6044f1d",
+                "sha256:9882c0c6b24429449f5f969a5158b528f39bde47dc32e85b9f0403965017e700"
+            ],
+            "index": "pypi",
+            "version": "==0.14.0"
+        },
         "pytest-cov": {
             "hashes": [
                 "sha256:45ec2d5182f89a81fc3eb29e3d1ed3113b9e9a873bcddb2a71faaab066110191",
@@ -300,6 +455,9 @@
             "version": "==3.13.2"
         },
         "python-socketio": {
+            "extras": [
+                "asyncio_client"
+            ],
             "hashes": [
                 "sha256:358d8fbbc029c4538ea25bcaa283e47f375be0017fcba829de8a3a731c9df25a",
                 "sha256:d437f797c44b6efba2f201867cf02b8c96b97dff26d4e4281ac08b45817cd522"
@@ -354,6 +512,14 @@
             ],
             "version": "==0.10.1"
         },
+        "traitlets": {
+            "hashes": [
+                "sha256:178f4ce988f69189f7e523337a3e11d91c786ded9360174a3d9ca83e79bc5396",
+                "sha256:69ff3f9d5351f31a7ad80443c2674b7099df13cc41fc5fa6e2f6d3b0330b0426"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==5.0.5"
+        },
         "typed-ast": {
             "hashes": [
                 "sha256:0666aa36131496aed8f7be0410ff974562ab7eeac11ef351def9ea6fa28f6355",
@@ -429,6 +595,13 @@
             ],
             "version": "==0.6"
         },
+        "wcwidth": {
+            "hashes": [
+                "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784",
+                "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"
+            ],
+            "version": "==0.2.5"
+        },
         "websockets": {
             "hashes": [
                 "sha256:0e4fb4de42701340bd2353bb2eee45314651caa6ccee80dbd5f5d5978888fed5",
@@ -456,6 +629,29 @@
             ],
             "version": "==8.1"
         },
+        "yarl": {
+            "hashes": [
+                "sha256:040b237f58ff7d800e6e0fd89c8439b841f777dd99b4a9cca04d6935564b9409",
+                "sha256:17668ec6722b1b7a3a05cc0167659f6c95b436d25a36c2d52db0eca7d3f72593",
+                "sha256:3a584b28086bc93c888a6c2aa5c92ed1ae20932f078c46509a66dce9ea5533f2",
+                "sha256:4439be27e4eee76c7632c2427ca5e73703151b22cae23e64adb243a9c2f565d8",
+                "sha256:48e918b05850fffb070a496d2b5f97fc31d15d94ca33d3d08a4f86e26d4e7c5d",
+                "sha256:9102b59e8337f9874638fcfc9ac3734a0cfadb100e47d55c20d0dc6087fb4692",
+                "sha256:9b930776c0ae0c691776f4d2891ebc5362af86f152dd0da463a6614074cb1b02",
+                "sha256:b3b9ad80f8b68519cc3372a6ca85ae02cc5a8807723ac366b53c0f089db19e4a",
+                "sha256:bc2f976c0e918659f723401c4f834deb8a8e7798a71be4382e024bcc3f7e23a8",
+                "sha256:c22c75b5f394f3d47105045ea551e08a3e804dc7e01b37800ca35b58f856c3d6",
+                "sha256:c52ce2883dc193824989a9b97a76ca86ecd1fa7955b14f87bf367a61b6232511",
+                "sha256:ce584af5de8830d8701b8979b18fcf450cef9a382b1a3c8ef189bedc408faf1e",
+                "sha256:da456eeec17fa8aa4594d9a9f27c0b1060b6a75f2419fe0c00609587b2695f4a",
+                "sha256:db6db0f45d2c63ddb1a9d18d1b9b22f308e52c83638c26b422d520a815c4b3fb",
+                "sha256:df89642981b94e7db5596818499c4b2219028f2a528c9c37cc1de45bf2fd3a3f",
+                "sha256:f18d68f2be6bf0e89f1521af2b1bb46e66ab0018faafa81d70f358153170a317",
+                "sha256:f379b7f83f23fe12823085cd6b906edc49df969eb99757f58ff382349a3303c6"
+            ],
+            "markers": "python_version >= '3.5'",
+            "version": "==1.5.1"
+        },
         "zipp": {
             "hashes": [
                 "sha256:16522f69653f0d67be90e8baa4a46d66389145b734345d68a257da53df670903",

From 58bcd909c1a473d50f43d22a9b87960bbb3f6f18 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 19:07:28 +0200
Subject: [PATCH 07/20] test(chat): basic unit tests

---
 src/app/tests/test_chat.py | 58 +++++++++++++++++++++++++++-----------
 1 file changed, 41 insertions(+), 17 deletions(-)

diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
index 2337531..b19e1ce 100644
--- a/src/app/tests/test_chat.py
+++ b/src/app/tests/test_chat.py
@@ -3,43 +3,67 @@
 import socketio
 import uvicorn
 
-from ..main import app
+from .. import main
 
 PORT = 5000
 
-server = None
-server_task = None
-
 
 def get_server():
-    config = uvicorn.Config(app, host='localhost', port=PORT)
+    """Get a complete server instance"""
+    config = uvicorn.Config(main.app, host='127.0.0.1', port=PORT)
     server = uvicorn.Server(config=config)
+    # deactivate monitoring task to avoid errores during shutdown
+    main.sio.eio.start_service_task = False
     config.setup_event_loop()
     return server
 
 
+async def wait_ready(server, interval=0.05, max_wait=5):
+    """Wait for the server to be ready"""
+    i = 0
+    while not server.started:
+        await asyncio.sleep(interval)
+        i += interval
+        if i > max_wait:
+            raise RuntimeError(f"Server couldn't startup in {max_wait} seconds")
+
+
 @pytest.fixture
 async def async_get_server():
-    global server
-    global server_task
-    print("Starting server")
+    """Start server as test fixture and tear down after test"""
     server = get_server()
-    server_task = server.serve()
-    asyncio.ensure_future(server_task)
-    asyncio.sleep(1)
+    serve_task = asyncio.create_task(server.serve())
+    await wait_ready(server)
+    yield
+    # teardown code
+    server.should_exit = True
+    await serve_task   # allow server run tasks before shut down
 
 
 @pytest.mark.asyncio
-async def test_websocket(async_get_server):
+async def test_chat_simple(async_get_server):
+    """A simple websocket test"""
+
+    class Result:
+        """Generic message result"""
+        # add any attributes you need
+        message_received = False
+        message = None
+
     sio = socketio.AsyncClient()
+    result = Result()
 
     @sio.on('chat message')
-    def message(data):
+    def on_message_received(data):
         print(f"Client received: {data}")
+        result.message_received = True
+        result.message = data
 
+    message = 'Hello!'
     await sio.connect(f'http://localhost:{PORT}', socketio_path='/sio/socket.io/')
-    await sio.emit('chat message', 'HOLA!')
+    print(f"Client sends: {message}")
+    await sio.emit('chat message', message)
+    await sio.sleep(0.1)
     await sio.disconnect()
-    server.should_exit = True
-    await server_task.close()
-    asyncio.get_running_loop().stop()
+    assert result.message_received is True
+    assert result.message == message

From 027612e6c0e0cd10560f9ea0ef76a5d20cf331cb Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 19:31:40 +0200
Subject: [PATCH 08/20] test(generic): Flake8 rules

---
 .flake8 | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 .flake8

diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..c013a79
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,9 @@
+[flake8]
+max-line-length = 119
+max-complexity = 10
+ignore =
+
+# darglint
+# Allow one line docstrings without arg spec
+strictness=short
+docstring_style=google

From 29a3fc2526fd6c207fb20340529d80454336234c Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 19:44:43 +0200
Subject: [PATCH 09/20] test(mypy): ignore socketio and uvicorn

The have no type annotations.
---
 .mypy.ini | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 .mypy.ini

diff --git a/.mypy.ini b/.mypy.ini
new file mode 100644
index 0000000..680c733
--- /dev/null
+++ b/.mypy.ini
@@ -0,0 +1,8 @@
+[mypy]
+
+[mypy-socketio.*]
+ignore_missing_imports = True
+
+[mypy-uvicorn.*]
+ignore_missing_imports = True
+

From 1170d5929bef88213e7a78e70ed857351f68c23c Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 20:08:46 +0200
Subject: [PATCH 10/20] feat(basic-app): use relative page path for chat.html

---
 src/app/main.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/app/main.py b/src/app/main.py
index fb03d97..e35a10c 100644
--- a/src/app/main.py
+++ b/src/app/main.py
@@ -45,4 +45,4 @@ async def home() -> dict:
 
 @app.get("/chat", response_class=FileResponse)
 def chat() -> FileResponse:
-    return FileResponse('chat.html')
+    return FileResponse(os.path.join(os.path.dirname(__file__), 'chat.html'))

From a4150b233377a5c2e1758f7cec51f55106f6f6ca Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 20:10:05 +0200
Subject: [PATCH 11/20] test(cov): ignore line

---
 src/app/tests/test_chat.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
index b19e1ce..b82b3e9 100644
--- a/src/app/tests/test_chat.py
+++ b/src/app/tests/test_chat.py
@@ -25,7 +25,7 @@ async def wait_ready(server, interval=0.05, max_wait=5):
         await asyncio.sleep(interval)
         i += interval
         if i > max_wait:
-            raise RuntimeError(f"Server couldn't startup in {max_wait} seconds")
+            raise RuntimeError(f"Server couldn't startup in {max_wait} seconds")  # pragma: no cover
 
 
 @pytest.fixture

From 4d8788f09f2127afb90e0e47798592f7001a057a Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 20:10:40 +0200
Subject: [PATCH 12/20] Test the chat page.

---
 src/app/tests/test_chat.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
index b82b3e9..33e3036 100644
--- a/src/app/tests/test_chat.py
+++ b/src/app/tests/test_chat.py
@@ -1,12 +1,22 @@
+# stdlib imports
 import asyncio
+import os
+
+# 3rd party imports
 import pytest
 import socketio
 import uvicorn
 
+# fastapi imports
+from fastapi.testclient import TestClient
+
+# project imports
 from .. import main
 
 PORT = 5000
 
+client = TestClient(main.app)
+
 
 def get_server():
     """Get a complete server instance"""
@@ -67,3 +77,13 @@ def on_message_received(data):
     await sio.disconnect()
     assert result.message_received is True
     assert result.message == message
+
+
+def test_chat_page():
+    """Check if chat page returns contents"""
+    response = client.get("/chat")
+    assert response.status_code == 200
+    fn = os.path.join(os.path.dirname(__file__), '..', 'chat.html')
+    print(f"Chat page: {fn}")
+    with open(fn, 'rb') as page:
+        assert response.content == page.read()

From c98fbf95b86902a2b7411f687546311d1d6579cb Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 20:11:17 +0200
Subject: [PATCH 13/20] pep8

---
 src/app/main.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/app/main.py b/src/app/main.py
index e35a10c..00f58aa 100644
--- a/src/app/main.py
+++ b/src/app/main.py
@@ -11,7 +11,8 @@
 app.mount("/static", StaticFiles(directory=os.path.join(path, "static")), name="static")
 
 sio = socketio.AsyncServer(async_mode='asgi')
-app.mount('/sio', socketio.ASGIApp(sio))  # socketio adds automatically /socket.io/ to the URL.
+# socketio adds automatically /socket.io/ to the URL.
+app.mount('/sio', socketio.ASGIApp(sio))
 
 
 @sio.on('connect')

From 2f4b65be228061f16ff69c1c6599f4a7a0ab6387 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 20:11:33 +0200
Subject: [PATCH 14/20] doc: improve docstrings.

---
 src/app/main.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/app/main.py b/src/app/main.py
index 00f58aa..2314635 100644
--- a/src/app/main.py
+++ b/src/app/main.py
@@ -17,20 +17,20 @@
 
 @sio.on('connect')
 def sio_connect(sid, environ):
-    """A user / browser tab has connected"""
+    """Track user connection"""
     print('A user connected')
 
 
 @sio.on('disconnect')
 def sio_disconnect(sid):
-    """A user / browser tab has disconnected"""
+    """Track user disconnection"""
     print('User disconnected')
 
 
 @sio.on('chat message')
 async def chat_message(sid, msg):
-    """A chat message has arrived"""
-    print('Message: %s' % msg)
+    """Receive a chat message and send to all clients"""
+    print(f"Server received and sends to all clients: {msg}")
     await sio.emit('chat message', msg)
 
 

From 8b104637449d524ec227ffd54cdb7b249ef5ad40 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <ernesto.revilla@gmail.com>
Date: Tue, 20 Oct 2020 20:12:26 +0200
Subject: [PATCH 15/20] test(flake8): Send output to stdout too

---
 run-tests.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/run-tests.sh b/run-tests.sh
index e843ec6..924afca 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -18,7 +18,7 @@ function msgsuccess(){
 
 # run first syntax and code style checks
 msgrun flake8
-$RUNNER run flake8 --output-file $DIR/flake8.txt src
+$RUNNER run flake8 src 2>&1 | tee $DIR/flake8.txt
 msgsuccess $? flake8
 $RUNNER run flake8_junit $DIR/flake8.txt $DIR/flake8_junit.xml >/dev/null
 

From 86a43e58d22a1ed9b6caf3c9a2bcec012b073463 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <erevilla@tangrambpm.es>
Date: Wed, 21 Oct 2020 01:22:31 +0200
Subject: [PATCH 16/20] tests(runner): fix flake8 exit status

Run flake8 with --tee, using tee alway returns exit status 0.
---
 run-tests.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/run-tests.sh b/run-tests.sh
index 924afca..624ebba 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -18,7 +18,7 @@ function msgsuccess(){
 
 # run first syntax and code style checks
 msgrun flake8
-$RUNNER run flake8 src 2>&1 | tee $DIR/flake8.txt
+$RUNNER run flake8 --tee --output-file $DIR/flake8.txt
 msgsuccess $? flake8
 $RUNNER run flake8_junit $DIR/flake8.txt $DIR/flake8_junit.xml >/dev/null
 

From be3287bf5b4b58d7d9ad3e6a7a7fe145e6f52d67 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <erevilla@tangrambpm.es>
Date: Wed, 21 Oct 2020 02:13:26 +0200
Subject: [PATCH 17/20] test(uvicorn): special uvicorn test server

---
 src/app/tests/test_chat.py | 90 ++++++++++++++++++++++----------------
 1 file changed, 52 insertions(+), 38 deletions(-)

diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
index 33e3036..7b430cb 100644
--- a/src/app/tests/test_chat.py
+++ b/src/app/tests/test_chat.py
@@ -1,3 +1,4 @@
+from typing import List, Optional
 # stdlib imports
 import asyncio
 import os
@@ -7,76 +8,89 @@
 import socketio
 import uvicorn
 
-# fastapi imports
+# FastAPI imports
+from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
 # project imports
 from .. import main
 
-PORT = 5000
+PORT = 8000
 
+# deactivate monitoring task in python-socketio to avoid errores during shutdown
+main.sio.eio.start_service_task = False
 client = TestClient(main.app)
 
 
-def get_server():
-    """Get a complete server instance"""
-    config = uvicorn.Config(main.app, host='127.0.0.1', port=PORT)
-    server = uvicorn.Server(config=config)
-    # deactivate monitoring task to avoid errores during shutdown
-    main.sio.eio.start_service_task = False
-    config.setup_event_loop()
-    return server
+class UvicornTestServer(uvicorn.Server):
+    """Uvicorn test server
 
+    Usage:
+        @pytest.fixture
+        server = UvicornTestServer()
+        await server.up()
+        yield
+        await server.down()
+    """
 
-async def wait_ready(server, interval=0.05, max_wait=5):
-    """Wait for the server to be ready"""
-    i = 0
-    while not server.started:
-        await asyncio.sleep(interval)
-        i += interval
-        if i > max_wait:
-            raise RuntimeError(f"Server couldn't startup in {max_wait} seconds")  # pragma: no cover
+    def __init__(self, app: FastAPI = main.app, host: str = '127.0.0.1', port: int = PORT):
+        """Create a Uvicorn test server
+
+        Args:
+            app (FastAPI, optional): the FastAPI app. Defaults to main.app.
+            host (str, optional): the host ip. Defaults to '127.0.0.1'.
+            port (int, optional): the port. Defaults to PORT.
+        """
+        self._startup_done = asyncio.Event()
+        super().__init__(config=uvicorn.Config(app, host=host, port=port))
+
+    async def startup(self, sockets: Optional[List] = None) -> None:
+        """Override uvicorn startup"""
+        await super().startup(sockets=sockets)
+        self.config.setup_event_loop()
+        self._startup_done.set()
+
+    async def up(self) -> None:
+        """Start up server asynchronously"""
+        self._serve_task = asyncio.create_task(self.serve())
+        await self._startup_done.wait()
+
+    async def down(self) -> None:
+        """Shut down server asynchronously"""
+        self.should_exit = True
+        await self._serve_task
 
 
 @pytest.fixture
-async def async_get_server():
+async def startup_and_shutdown_server():
     """Start server as test fixture and tear down after test"""
-    server = get_server()
-    serve_task = asyncio.create_task(server.serve())
-    await wait_ready(server)
+    server = UvicornTestServer()
+    await server.up()
     yield
-    # teardown code
-    server.should_exit = True
-    await serve_task   # allow server run tasks before shut down
+    await server.down()
 
 
 @pytest.mark.asyncio
-async def test_chat_simple(async_get_server):
+async def test_chat_simple(startup_and_shutdown_server):
     """A simple websocket test"""
 
-    class Result:
-        """Generic message result"""
-        # add any attributes you need
-        message_received = False
-        message = None
-
     sio = socketio.AsyncClient()
-    result = Result()
+    future = asyncio.get_running_loop().create_future()
 
     @sio.on('chat message')
     def on_message_received(data):
         print(f"Client received: {data}")
-        result.message_received = True
-        result.message = data
+        # set the result
+        future.set_result(message)
 
     message = 'Hello!'
     await sio.connect(f'http://localhost:{PORT}', socketio_path='/sio/socket.io/')
     print(f"Client sends: {message}")
     await sio.emit('chat message', message)
-    await sio.sleep(0.1)
+    # wait for the result to be set (avoid waiting forever)
+    await asyncio.wait_for(future, timeout=1.0)
     await sio.disconnect()
-    assert result.message_received is True
-    assert result.message == message
+    assert future.result() == message
 
 
 def test_chat_page():

From 4d3675149695e3564d8a3ce5a942a895ac566a57 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <erevilla@tangrambpm.es>
Date: Wed, 21 Oct 2020 02:20:06 +0200
Subject: [PATCH 18/20] test(minor): minor improvement

---
 src/app/tests/test_chat.py | 2 +-
 src/app/tests/test_main.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
index 7b430cb..4f35d67 100644
--- a/src/app/tests/test_chat.py
+++ b/src/app/tests/test_chat.py
@@ -96,7 +96,7 @@ def on_message_received(data):
 def test_chat_page():
     """Check if chat page returns contents"""
     response = client.get("/chat")
-    assert response.status_code == 200
+    assert response.ok
     fn = os.path.join(os.path.dirname(__file__), '..', 'chat.html')
     print(f"Chat page: {fn}")
     with open(fn, 'rb') as page:
diff --git a/src/app/tests/test_main.py b/src/app/tests/test_main.py
index 2eabd9d..b7bf4f6 100644
--- a/src/app/tests/test_main.py
+++ b/src/app/tests/test_main.py
@@ -7,7 +7,7 @@
 def test_home():
     """Test home view"""
     response = client.get("/")
-    assert response.status_code == 200
+    assert response.ok
     result = response.json()
     assert 'message' in result
     assert result['message'].lower().startswith("hello world")

From 6a5d079198ed62de91adb7ad3fa370c627883f12 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <erevilla@tangrambpm.es>
Date: Wed, 21 Oct 2020 02:28:07 +0200
Subject: [PATCH 19/20] test(chat): small fix

---
 src/app/tests/test_chat.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
index 4f35d67..801a9a6 100644
--- a/src/app/tests/test_chat.py
+++ b/src/app/tests/test_chat.py
@@ -1,3 +1,4 @@
+"""Some python-socketio tests"""
 from typing import List, Optional
 # stdlib imports
 import asyncio
@@ -81,7 +82,7 @@ async def test_chat_simple(startup_and_shutdown_server):
     def on_message_received(data):
         print(f"Client received: {data}")
         # set the result
-        future.set_result(message)
+        future.set_result(data)
 
     message = 'Hello!'
     await sio.connect(f'http://localhost:{PORT}', socketio_path='/sio/socket.io/')

From 562ba77d092d986894c6557dd206d651b8375670 Mon Sep 17 00:00:00 2001
From: Ernesto Revilla <erevilla@tangrambpm.es>
Date: Wed, 21 Oct 2020 02:53:18 +0200
Subject: [PATCH 20/20] doc(pylint): improve

---
 src/app/main.py            |  7 ++++---
 src/app/tests/test_chat.py | 28 +++++++++++++++-------------
 src/app/tests/test_main.py |  2 ++
 3 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/src/app/main.py b/src/app/main.py
index 2314635..66f06a7 100644
--- a/src/app/main.py
+++ b/src/app/main.py
@@ -16,19 +16,19 @@
 
 
 @sio.on('connect')
-def sio_connect(sid, environ):
+def sio_connect(sid, environ):      # pylint: disable=unused-argument
     """Track user connection"""
     print('A user connected')
 
 
 @sio.on('disconnect')
-def sio_disconnect(sid):
+def sio_disconnect(sid):            # pylint: disable=unused-argument
     """Track user disconnection"""
     print('User disconnected')
 
 
 @sio.on('chat message')
-async def chat_message(sid, msg):
+async def chat_message(sid, msg):   # pylint: disable=unused-argument
     """Receive a chat message and send to all clients"""
     print(f"Server received and sends to all clients: {msg}")
     await sio.emit('chat message', msg)
@@ -46,4 +46,5 @@ async def home() -> dict:
 
 @app.get("/chat", response_class=FileResponse)
 def chat() -> FileResponse:
+    """Load the chat html page"""
     return FileResponse(os.path.join(os.path.dirname(__file__), 'chat.html'))
diff --git a/src/app/tests/test_chat.py b/src/app/tests/test_chat.py
index 801a9a6..f7ff307 100644
--- a/src/app/tests/test_chat.py
+++ b/src/app/tests/test_chat.py
@@ -1,5 +1,5 @@
 """Some python-socketio tests"""
-from typing import List, Optional
+from typing import Any, List, Optional, Awaitable
 # stdlib imports
 import asyncio
 import os
@@ -13,7 +13,7 @@
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
-# project imports
+# project importsn
 from .. import main
 
 PORT = 8000
@@ -43,6 +43,7 @@ def __init__(self, app: FastAPI = main.app, host: str = '127.0.0.1', port: int =
             port (int, optional): the port. Defaults to PORT.
         """
         self._startup_done = asyncio.Event()
+        self._serve_task: Optional[Awaitable[Any]] = None
         super().__init__(config=uvicorn.Config(app, host=host, port=port))
 
     async def startup(self, sockets: Optional[List] = None) -> None:
@@ -51,35 +52,36 @@ async def startup(self, sockets: Optional[List] = None) -> None:
         self.config.setup_event_loop()
         self._startup_done.set()
 
-    async def up(self) -> None:
+    async def start_up(self) -> None:
         """Start up server asynchronously"""
         self._serve_task = asyncio.create_task(self.serve())
         await self._startup_done.wait()
 
-    async def down(self) -> None:
+    async def tear_down(self) -> None:
         """Shut down server asynchronously"""
         self.should_exit = True
-        await self._serve_task
+        if self._serve_task:
+            await self._serve_task
 
 
 @pytest.fixture
-async def startup_and_shutdown_server():
+async def startup_and_shutdown_server():    # pylint: disable=unused-variable
     """Start server as test fixture and tear down after test"""
     server = UvicornTestServer()
-    await server.up()
+    await server.start_up()
     yield
-    await server.down()
+    await server.tear_down()
 
 
 @pytest.mark.asyncio
-async def test_chat_simple(startup_and_shutdown_server):
+async def test_chat_simple(startup_and_shutdown_server):  # pylint: disable=unused-argument,redefined-outer-name
     """A simple websocket test"""
 
     sio = socketio.AsyncClient()
     future = asyncio.get_running_loop().create_future()
 
     @sio.on('chat message')
-    def on_message_received(data):
+    def on_message_received(data):          # pylint: disable=unused-variable
         print(f"Client received: {data}")
         # set the result
         future.set_result(data)
@@ -98,7 +100,7 @@ def test_chat_page():
     """Check if chat page returns contents"""
     response = client.get("/chat")
     assert response.ok
-    fn = os.path.join(os.path.dirname(__file__), '..', 'chat.html')
-    print(f"Chat page: {fn}")
-    with open(fn, 'rb') as page:
+    filename = os.path.join(os.path.dirname(__file__), '..', 'chat.html')
+    print(f"Chat page: {filename}")
+    with open(filename, 'rb') as page:
         assert response.content == page.read()
diff --git a/src/app/tests/test_main.py b/src/app/tests/test_main.py
index b7bf4f6..cbb313c 100644
--- a/src/app/tests/test_main.py
+++ b/src/app/tests/test_main.py
@@ -1,3 +1,5 @@
+"""Main app tests"""
+
 from fastapi.testclient import TestClient
 from ..main import app