Enforce a consistent coding style using eslint

.eslintrc

@@ -0,0 +1,28 @@
+{
+  "env": {
+    "node": true
+  },
+  "rules": {
+    "array-bracket-spacing": [2, "never"],
+    "block-scoped-var": 2,
+    "brace-style": [2, "1tbs", {"allowSingleLine": true}],
+    "comma-dangle": [2, "always-multiline"],
+    "computed-property-spacing": [2, "never"],
+    "curly": 2,
+    "eol-last": 2,
+    "eqeqeq": [2, "smart"],
+    "max-len": [1, 125],
+    "new-cap": 1,
+    "no-extend-native": 2,
+    "no-mixed-spaces-and-tabs": 2,
+    "no-trailing-spaces": 2,
+    "no-undef": 2,
+    "no-unused-vars": 1,
+    "no-use-before-define": [2, "nofunc"],
+    "object-curly-spacing": [2, "never"],
+    "quotes": [2, "single", "avoid-escape"],
+    "semi": [2, "always"],
+    "keyword-spacing": 2,
+    "space-unary-ops": 2
+  }
+}

lib/cors-anywhere.js

@@ -104,11 +104,11 @@ function proxyRequest(req, res, proxy) {
 /**
  * "Allow observer to modify headers or abort response"
  * https://github.com/nodejitsu/node-http-proxy/blob/v1.11.1/lib/http-proxy/passes/web-incoming.js#L147
- * 
+ *
  * This method modifies the response headers of the proxied response.
  * If a redirect is detected, the response is not sent to the client,
  * and a new request is initiated.
- * 
+ *
  * @param response {ClientRequest} The response of the proxied request
  * @param req {IncomingMessage} Incoming HTTP request, augmented with property corsAnywhereRequestState
  * @param req.corsAnywhereRequestState {object}
@@ -122,7 +122,6 @@ function proxyRequest(req, res, proxy) {
  * @this {HttpProxy}
  */
 function onProxyResponse(response, req, res) {
-  /* jshint validthis:true */
   var proxy = this;
   var requestState = req.corsAnywhereRequestState;
 
@@ -145,7 +144,7 @@ function onProxyResponse(response, req, res) {
           // cancel redirects.
           // Set header for debugging purposes. Do not try to parse it!
           res.setHeader('X-CORS-Redirect-' + requestState.redirectCount_, statusCode + ' ' + locationHeader);
-          
+
           req.method = 'GET';
           req.headers['content-length'] = '0';
           delete req.headers['content-type'];
@@ -160,15 +159,15 @@ function onProxyResponse(response, req, res) {
           res.setHeader = res.writeHead = function noop() {};
           response.on = function noop2() {};
           response.pipe = function(res) {
-              res.setHeader = setHeader;
-              res.writeHead = writeHead;
-              // Trigger proxyReq.abort() (this is not of any imporance, it's just used to stop wasting resources.)
-              // https://github.com/nodejitsu/node-http-proxy/blob/v1.11.1/lib/http-proxy/passes/web-incoming.js#L125-L128
-              req.emit('aborted');
-              // Remove all listeners (=reset events to initial state)
-              req.removeAllListeners();
-              // Initiate a new proxy request.
-              proxyRequest(req, res, proxy);
+            res.setHeader = setHeader;
+            res.writeHead = writeHead;
+            // Trigger proxyReq.abort() (this is not of any imporance, it's just used to stop wasting resources.)
+            // https://github.com/nodejitsu/node-http-proxy/blob/v1.11.1/lib/http-proxy/passes/web-incoming.js#L125-L128
+            req.emit('aborted');
+            // Remove all listeners (=reset events to initial state)
+            req.removeAllListeners();
+            // Initiate a new proxy request.
+            proxyRequest(req, res, proxy);
           };
           return;
         }
@@ -200,12 +199,12 @@ function parseURL(req_url) {
     return null;
   }
   if (!match[1]) {
-    // scheme is omitted.
+    // Scheme is omitted.
     if (req_url.lastIndexOf('//', 0) === -1) {
       // "//" is omitted.
       req_url = '//' + req_url;
     }
-    req_url = (match[4] == '443' ? 'https:' : 'http:') + req_url;
+    req_url = (match[4] === '443' ? 'https:' : 'http:') + req_url;
   }
   return url.parse(req_url);
 }
@@ -219,7 +218,7 @@ var getHandler = exports.getHandler = function(options, proxy) {
     originWhitelist: [],      // If non-empty, requests not from an origin in this list will be blocked.
     requireHeader: null,      // Require a header to be set?
     removeHeaders: [],        // Strip these request headers.
-    setHeaders: {}            // Set these request headers.
+    setHeaders: {},           // Set these request headers.
   };
   if (options) {
     Object.keys(corsAnywhere).forEach(function(option) {
@@ -248,7 +247,7 @@ var getHandler = exports.getHandler = function(options, proxy) {
 
   return function(req, res) {
     var cors_headers = withCORS({}, req);
-    if (req.method == 'OPTIONS') {
+    if (req.method === 'OPTIONS') {
       // Pre-flight request. Reply successfully:
       res.writeHead(200, cors_headers);
       res.end();
@@ -320,7 +319,7 @@ var getHandler = exports.getHandler = function(options, proxy) {
       location: location,
       getProxyForUrl: corsAnywhere.getProxyForUrl,
       maxRedirects: corsAnywhere.maxRedirects,
-      proxyBaseUrl: proxyBaseUrl
+      proxyBaseUrl: proxyBaseUrl,
     };
 
     proxyRequest(req, res, proxy);
@@ -330,7 +329,7 @@ var getHandler = exports.getHandler = function(options, proxy) {
 // Create server with default and given values
 // Creator still needs to call .listen()
 exports.createServer = function createServer(options) {
-  if (!options) options = {};
+  options = options || {};
 
   // Default options:
   var httpProxyOptions = {

package.json

@@ -1,23 +1,23 @@
 {
   "name": "cors-anywhere",
   "version": "0.3.0",
-  "description": "CORS Anywhere is a reverse proxy which adds CORS headers to the proxied request. Request URL is taken from the path", 
+  "description": "CORS Anywhere is a reverse proxy which adds CORS headers to the proxied request. Request URL is taken from the path",
   "license": "MIT",
   "author": "Rob Wu <[email protected]>",
   "repository": {
-      "type": "git",
-      "url": "https://github.com/Rob--W/cors-anywhere.git"
+    "type": "git",
+    "url": "https://github.com/Rob--W/cors-anywhere.git"
   },
   "bugs": {
-      "url": "https://github.com/Rob--W/cors-anywhere/issues/",
-      "email": "[email protected]"
+    "url": "https://github.com/Rob--W/cors-anywhere/issues/",
+    "email": "[email protected]"
   },
   "keywords": [
-      "cors",
-      "cross-domain",
-      "http-proxy",
-      "proxy",
-      "heroku"
+    "cors",
+    "cross-domain",
+    "http-proxy",
+    "proxy",
+    "heroku"
   ],
   "main": "./lib/cors-anywhere.js",
   "dependencies": {
@@ -26,11 +26,13 @@
     "requires-port": "1.0.0"
   },
   "devDependencies": {
+    "eslint": "^2.2.0",
     "mocha": "~2.2.4",
     "nock": "~1.9.0",
     "supertest": "~0.15.0"
   },
   "scripts": {
+    "lint": "eslint .",
     "test": "./node_modules/.bin/mocha ./test/test*.js --reporter spec"
   },
   "engines": {

server.js

@@ -10,21 +10,21 @@ var originBlacklist = (process.env.CORSANYWHERE_BLACKLIST || '').split(',');
 
 var cors_proxy = require('./lib/cors-anywhere');
 cors_proxy.createServer({
-    originBlacklist: originBlacklist,
-    requireHeader: ['origin', 'x-requested-with'],
-    removeHeaders: [
-        'cookie',
-        'cookie2',
-        // Strip Heroku-specific headers
-        'x-heroku-queue-wait-time',
-        'x-heroku-queue-depth',
-        'x-heroku-dynos-in-use',
-        'x-request-start'
-    ],
-    httpProxyOptions: {
-        // Do not add X-Forwarded-For, etc. headers, because Heroku already adds it.
-        xfwd: false
-    }
+  originBlacklist: originBlacklist,
+  requireHeader: ['origin', 'x-requested-with'],
+  removeHeaders: [
+    'cookie',
+    'cookie2',
+    // Strip Heroku-specific headers
+    'x-heroku-queue-wait-time',
+    'x-heroku-queue-depth',
+    'x-heroku-dynos-in-use',
+    'x-request-start',
+  ],
+  httpProxyOptions: {
+    // Do not add X-Forwarded-For, etc. headers, because Heroku already adds it.
+    xfwd: false,
+  },
 }).listen(port, host, function() {
-    console.log('Running CORS Anywhere on ' + host + ':' + port);
+  console.log('Running CORS Anywhere on ' + host + ':' + port);
 });

test/setup.js

@@ -6,7 +6,7 @@ function echoheaders(origin) {
   nock(origin)
     .persist()
     .get('/echoheaders')
-    .reply(function(uri) {
+    .reply(function() {
       var headers = this.req.headers;
       var excluded_headers = [
         'accept-encoding',
@@ -49,18 +49,18 @@ nock('http://example.com')
 
   .get('/redirecttarget')
   .reply(200, 'redirect target', {
-    'Some-header': 'value'
+    'Some-header': 'value',
   })
 
   .head('/redirect')
   .reply(302, '', {
-    'Location': '/redirecttarget'
+    Location: '/redirecttarget',
   })
 
   .get('/redirect')
   .reply(302, 'redirecting...', {
     'header at redirect': 'should not be here',
-    'Location': '/redirecttarget'
+    Location: '/redirecttarget',
   })
 
   .get('/redirectposttarget')
@@ -71,22 +71,22 @@ nock('http://example.com')
 
   .post('/redirectpost')
   .reply(302, 'redirecting...', {
-    'Location': '/redirectposttarget'
+    Location: '/redirectposttarget',
   })
 
   .post('/redirect307')
   .reply(307, 'redirecting...', {
-    'Location': '/redirectposttarget'
+    Location: '/redirectposttarget',
   })
 
   .get('/redirect2redirect')
   .reply(302, 'redirecting to redirect...', {
-    'Location': '/redirect'
+    Location: '/redirect',
   })
 
   .get('/redirectloop')
   .reply(302, 'redirecting ad infinitum...', {
-    'Location': '/redirectloop'
+    Location: '/redirectloop',
   })
 
   .get('/proxyerror')

test/test-memory.js

@@ -1,3 +1,4 @@
+/* eslint-env mocha */
 // Run this specific test using:
 // npm test -- -f memory
 var http = require('http');