Added support for brotli ('br') content-encoding

Update README.md

DRYed error throwing (the one with encoding specified)

Updated brotli detection method

Allow "__core-js_shared__" leak in mocha

README.md

@@ -16,6 +16,8 @@ before trusting. For example, `req.body.foo.toString()` may fail in multiple
 ways, for example the `foo` property may not be there or may not be a string,
 and `toString` may not be a function and instead a string or other user input.
 
+**Note** Brotli is supported only since Node.js versions v11.7.0 and v10.16.0.
+
 [Learn about the anatomy of an HTTP transaction in Node.js](https://nodejs.org/en/docs/guides/anatomy-of-an-http-transaction/).
 
 _This does not handle multipart bodies_, due to their complex and typically
@@ -64,8 +66,8 @@ The various errors returned by this module are described in the
 
 Returns middleware that only parses `json` and only looks at requests where
 the `Content-Type` header matches the `type` option. This parser accepts any
-Unicode encoding of the body and supports automatic inflation of `gzip` and
-`deflate` encodings.
+Unicode encoding of the body and supports automatic inflation of `gzip`,
+`br` (brotli) and `deflate` encodings.
 
 A new `body` object containing the parsed data is populated on the `request`
 object after the middleware (i.e. `req.body`).
@@ -119,7 +121,8 @@ encoding of the request. The parsing can be aborted by throwing an error.
 
 Returns middleware that parses all bodies as a `Buffer` and only looks at
 requests where the `Content-Type` header matches the `type` option. This
-parser supports automatic inflation of `gzip` and `deflate` encodings.
+parser supports automatic inflation of `gzip`, `br` (brotli) and `deflate`
+encodings.
 
 A new `body` object containing the parsed data is populated on the `request`
 object after the middleware (i.e. `req.body`). This will be a `Buffer` object
@@ -164,7 +167,8 @@ encoding of the request. The parsing can be aborted by throwing an error.
 
 Returns middleware that parses all bodies as a string and only looks at
 requests where the `Content-Type` header matches the `type` option. This
-parser supports automatic inflation of `gzip` and `deflate` encodings.
+parser supports automatic inflation of `gzip`, `br` (brotli) and `deflate`
+encodings.
 
 A new `body` string containing the parsed data is populated on the `request`
 object after the middleware (i.e. `req.body`). This will be a string of the
@@ -214,7 +218,7 @@ encoding of the request. The parsing can be aborted by throwing an error.
 Returns middleware that only parses `urlencoded` bodies and only looks at
 requests where the `Content-Type` header matches the `type` option. This
 parser accepts only UTF-8 encoding of the body and supports automatic
-inflation of `gzip` and `deflate` encodings.
+inflation of `gzip`, `br` (brotli) and `deflate` encodings.
 
 A new `body` object containing the parsed data is populated on the `request`
 object after the middleware (i.e. `req.body`). This object will contain

lib/read.js

@@ -25,6 +25,12 @@ var zlib = require('zlib')
 
 module.exports = read
 
+/**
+ * @const
+ * whether current node version has brotli support
+ */
+var hasBrotliSupport = 'createBrotliDecompress' in zlib
+
 /**
  * Read a request into a buffer and parse.
  *
@@ -174,11 +180,20 @@ function contentstream (req, debug, inflate) {
       stream = req
       stream.length = length
       break
-    default:
-      throw createError(415, 'unsupported content encoding "' + encoding + '"', {
-        encoding: encoding,
-        type: 'encoding.unsupported'
-      })
+    case 'br':
+      if (hasBrotliSupport) {
+        stream = zlib.createBrotliDecompress()
+        debug('brotli decompress body')
+        req.pipe(stream)
+      }
+      break
+  }
+
+  if (stream === undefined) {
+    throw createError(415, 'unsupported content encoding "' + encoding + '"', {
+      encoding: encoding,
+      type: 'encoding.unsupported'
+    })
   }
 
   return stream

package.json

@@ -46,9 +46,9 @@
     "node": ">= 0.10"
   },
   "scripts": {
-    "lint": "eslint .",
-    "test": "mocha --require test/support/env --reporter spec --check-leaks --bail test/",
-    "test-ci": "nyc --reporter=lcov --reporter=text npm test",
-    "test-cov": "nyc --reporter=html --reporter=text npm test"
+    "lint": "eslint --plugin markdown --ext js,md .",
+    "test": "mocha --require test/support/env --reporter spec --check-leaks --global __core-js_shared__ --bail test/",
+    "test-cov": "nyc --reporter=html --reporter=text npm test",
+    "test-travis": "nyc --reporter=text npm test"
   }
 }

test/json.js

@@ -12,6 +12,12 @@ var describeAsyncHooks = typeof asyncHooks.AsyncLocalStorage === 'function'
   ? describe
   : describe.skip
 
+/**
+ * @const
+ * whether current node version has brotli support
+ */
+var hasBrotliSupport = 'createBrotliDecompress' in require('zlib')
+
 describe('bodyParser.json()', function () {
   it('should parse JSON', function (done) {
     request(createServer())
@@ -683,6 +689,24 @@ describe('bodyParser.json()', function () {
       test.expect(200, '{"name":"论"}', done)
     })
 
+    var brotlit = hasBrotliSupport ? it : it.skip
+    brotlit('should support brotli encoding', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'application/json')
+      test.write(Buffer.from('8b06807b226e616d65223a22e8aeba227d03', 'hex'))
+      test.expect(200, '{"name":"论"}', done)
+    })
+
+    var nobrotlit = hasBrotliSupport ? it.skip : it
+    nobrotlit('should throw 415 if there\'s no brotli support', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'application/json')
+      test.write(Buffer.from('8b06807b226e616d65223a22e8aeba227d03', 'hex'))
+      test.expect(415, 'unsupported content encoding "br"', done)
+    })
+
     it('should be case-insensitive', function (done) {
       var test = request(this.server).post('/')
       test.set('Content-Encoding', 'GZIP')

test/raw.js

@@ -12,6 +12,12 @@ var describeAsyncHooks = typeof asyncHooks.AsyncLocalStorage === 'function'
   ? describe
   : describe.skip
 
+/**
+ * @const
+ * whether current node version has brotli support
+ */
+var hasBrotliSupport = 'createBrotliDecompress' in require('zlib')
+
 describe('bodyParser.raw()', function () {
   before(function () {
     this.server = createServer()
@@ -455,6 +461,24 @@ describe('bodyParser.raw()', function () {
       test.expect(200, 'buf:6e616d653de8aeba', done)
     })
 
+    var brotlit = hasBrotliSupport ? it : it.skip
+    brotlit('should support brotli encoding', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'application/octet-stream')
+      test.write(Buffer.from('8b03806e616d653de8aeba03', 'hex'))
+      test.expect(200, 'buf:6e616d653de8aeba', done)
+    })
+
+    var nobrotlit = hasBrotliSupport ? it.skip : it
+    nobrotlit('should throw 415 if there\'s no brotli support', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'application/octet-stream')
+      test.write(Buffer.from('8b03806e616d653de8aeba03', 'hex'))
+      test.expect(415, 'unsupported content encoding "br"', done)
+    })
+
     it('should be case-insensitive', function (done) {
       var test = request(this.server).post('/')
       test.set('Content-Encoding', 'GZIP')

test/text.js

@@ -12,6 +12,12 @@ var describeAsyncHooks = typeof asyncHooks.AsyncLocalStorage === 'function'
   ? describe
   : describe.skip
 
+/**
+ * @const
+ * whether current node version has brotli support
+ */
+var hasBrotliSupport = 'createBrotliDecompress' in require('zlib')
+
 describe('bodyParser.text()', function () {
   before(function () {
     this.server = createServer()
@@ -525,6 +531,24 @@ describe('bodyParser.text()', function () {
       test.expect(200, '"name is 论"', done)
     })
 
+    var brotlit = hasBrotliSupport ? it : it.skip
+    brotlit('should support brotli encoding', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'text/plain')
+      test.write(Buffer.from('0b05806e616d6520697320e8aeba03', 'hex'))
+      test.expect(200, '"name is 论"', done)
+    })
+
+    var nobrotlit = hasBrotliSupport ? it.skip : it
+    nobrotlit('should throw 415 if there\'s no brotli support', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'text/plain')
+      test.write(Buffer.from('0b05806e616d6520697320e8aeba03', 'hex'))
+      test.expect(415, 'unsupported content encoding "br"', done)
+    })
+
     it('should be case-insensitive', function (done) {
       var test = request(this.server).post('/')
       test.set('Content-Encoding', 'GZIP')

test/urlencoded.js

@@ -12,6 +12,12 @@ var describeAsyncHooks = typeof asyncHooks.AsyncLocalStorage === 'function'
   ? describe
   : describe.skip
 
+/**
+ * @const
+ * whether current node version has brotli support
+ */
+var hasBrotliSupport = 'createBrotliDecompress' in require('zlib')
+
 describe('bodyParser.urlencoded()', function () {
   before(function () {
     this.server = createServer()
@@ -831,6 +837,24 @@ describe('bodyParser.urlencoded()', function () {
       test.expect(200, '{"name":"论"}', done)
     })
 
+    var brotlit = hasBrotliSupport ? it : it.skip
+    brotlit('should support brotli encoding', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'application/x-www-form-urlencoded')
+      test.write(Buffer.from('8b03806e616d653de8aeba03', 'hex'))
+      test.expect(200, '{"name":"论"}', done)
+    })
+
+    var nobrotlit = hasBrotliSupport ? it.skip : it
+    nobrotlit('should throw 415 if there\'s no brotli support', function (done) {
+      var test = request(this.server).post('/')
+      test.set('Content-Encoding', 'br')
+      test.set('Content-Type', 'application/x-www-form-urlencoded')
+      test.write(Buffer.from('789ccb4bcc4db57db16e17001068042f', 'hex'))
+      test.expect(415, 'unsupported content encoding "br"', done)
+    })
+
     it('should be case-insensitive', function (done) {
       var test = request(this.server).post('/')
       test.set('Content-Encoding', 'GZIP')