update

node_modules/raw-body/index.js

@@ -0,0 +1,286 @@
+/*!
+ * raw-body
+ * Copyright(c) 2013-2014 Jonathan Ong
+ * Copyright(c) 2014-2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict'
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var bytes = require('bytes')
+var createError = require('http-errors')
+var iconv = require('iconv-lite')
+var unpipe = require('unpipe')
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = getRawBody
+
+/**
+ * Module variables.
+ * @private
+ */
+
+var ICONV_ENCODING_MESSAGE_REGEXP = /^Encoding not recognized: /
+
+/**
+ * Get the decoder for a given encoding.
+ *
+ * @param {string} encoding
+ * @private
+ */
+
+function getDecoder (encoding) {
+  if (!encoding) return null
+
+  try {
+    return iconv.getDecoder(encoding)
+  } catch (e) {
+    // error getting decoder
+    if (!ICONV_ENCODING_MESSAGE_REGEXP.test(e.message)) throw e
+
+    // the encoding was not found
+    throw createError(415, 'specified encoding unsupported', {
+      encoding: encoding,
+      type: 'encoding.unsupported'
+    })
+  }
+}
+
+/**
+ * Get the raw body of a stream (typically HTTP).
+ *
+ * @param {object} stream
+ * @param {object|string|function} [options]
+ * @param {function} [callback]
+ * @public
+ */
+
+function getRawBody (stream, options, callback) {
+  var done = callback
+  var opts = options || {}
+
+  if (options === true || typeof options === 'string') {
+    // short cut for encoding
+    opts = {
+      encoding: options
+    }
+  }
+
+  if (typeof options === 'function') {
+    done = options
+    opts = {}
+  }
+
+  // validate callback is a function, if provided
+  if (done !== undefined && typeof done !== 'function') {
+    throw new TypeError('argument callback must be a function')
+  }
+
+  // require the callback without promises
+  if (!done && !global.Promise) {
+    throw new TypeError('argument callback is required')
+  }
+
+  // get encoding
+  var encoding = opts.encoding !== true
+    ? opts.encoding
+    : 'utf-8'
+
+  // convert the limit to an integer
+  var limit = bytes.parse(opts.limit)
+
+  // convert the expected length to an integer
+  var length = opts.length != null && !isNaN(opts.length)
+    ? parseInt(opts.length, 10)
+    : null
+
+  if (done) {
+    // classic callback style
+    return readStream(stream, encoding, length, limit, done)
+  }
+
+  return new Promise(function executor (resolve, reject) {
+    readStream(stream, encoding, length, limit, function onRead (err, buf) {
+      if (err) return reject(err)
+      resolve(buf)
+    })
+  })
+}
+
+/**
+ * Halt a stream.
+ *
+ * @param {Object} stream
+ * @private
+ */
+
+function halt (stream) {
+  // unpipe everything from the stream
+  unpipe(stream)
+
+  // pause stream
+  if (typeof stream.pause === 'function') {
+    stream.pause()
+  }
+}
+
+/**
+ * Read the data from the stream.
+ *
+ * @param {object} stream
+ * @param {string} encoding
+ * @param {number} length
+ * @param {number} limit
+ * @param {function} callback
+ * @public
+ */
+
+function readStream (stream, encoding, length, limit, callback) {
+  var complete = false
+  var sync = true
+
+  // check the length and limit options.
+  // note: we intentionally leave the stream paused,
+  // so users should handle the stream themselves.
+  if (limit !== null && length !== null && length > limit) {
+    return done(createError(413, 'request entity too large', {
+      expected: length,
+      length: length,
+      limit: limit,
+      type: 'entity.too.large'
+    }))
+  }
+
+  // streams1: assert request encoding is buffer.
+  // streams2+: assert the stream encoding is buffer.
+  //   stream._decoder: streams1
+  //   state.encoding: streams2
+  //   state.decoder: streams2, specifically < 0.10.6
+  var state = stream._readableState
+  if (stream._decoder || (state && (state.encoding || state.decoder))) {
+    // developer error
+    return done(createError(500, 'stream encoding should not be set', {
+      type: 'stream.encoding.set'
+    }))
+  }
+
+  var received = 0
+  var decoder
+
+  try {
+    decoder = getDecoder(encoding)
+  } catch (err) {
+    return done(err)
+  }
+
+  var buffer = decoder
+    ? ''
+    : []
+
+  // attach listeners
+  stream.on('aborted', onAborted)
+  stream.on('close', cleanup)
+  stream.on('data', onData)
+  stream.on('end', onEnd)
+  stream.on('error', onEnd)
+
+  // mark sync section complete
+  sync = false
+
+  function done () {
+    var args = new Array(arguments.length)
+
+    // copy arguments
+    for (var i = 0; i < args.length; i++) {
+      args[i] = arguments[i]
+    }
+
+    // mark complete
+    complete = true
+
+    if (sync) {
+      process.nextTick(invokeCallback)
+    } else {
+      invokeCallback()
+    }
+
+    function invokeCallback () {
+      cleanup()
+
+      if (args[0]) {
+        // halt the stream on error
+        halt(stream)
+      }
+
+      callback.apply(null, args)
+    }
+  }
+
+  function onAborted () {
+    if (complete) return
+
+    done(createError(400, 'request aborted', {
+      code: 'ECONNABORTED',
+      expected: length,
+      length: length,
+      received: received,
+      type: 'request.aborted'
+    }))
+  }
+
+  function onData (chunk) {
+    if (complete) return
+
+    received += chunk.length
+
+    if (limit !== null && received > limit) {
+      done(createError(413, 'request entity too large', {
+        limit: limit,
+        received: received,
+        type: 'entity.too.large'
+      }))
+    } else if (decoder) {
+      buffer += decoder.write(chunk)
+    } else {
+      buffer.push(chunk)
+    }
+  }
+
+  function onEnd (err) {
+    if (complete) return
+    if (err) return done(err)
+
+    if (length !== null && received !== length) {
+      done(createError(400, 'request size did not match content length', {
+        expected: length,
+        length: length,
+        received: received,
+        type: 'request.size.invalid'
+      }))
+    } else {
+      var string = decoder
+        ? buffer + (decoder.end() || '')
+        : Buffer.concat(buffer)
+      done(null, string)
+    }
+  }
+
+  function cleanup () {
+    buffer = null
+
+    stream.removeListener('aborted', onAborted)
+    stream.removeListener('data', onData)
+    stream.removeListener('end', onEnd)
+    stream.removeListener('error', onEnd)
+    stream.removeListener('close', cleanup)
+  }
+}