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node_modules/request/index.js 3.88 KB
aaac7fed   liuqimichale   add
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  // Copyright 2010-2012 Mikeal Rogers
  //
  //    Licensed under the Apache License, Version 2.0 (the "License");
  //    you may not use this file except in compliance with the License.
  //    You may obtain a copy of the License at
  //
  //        http://www.apache.org/licenses/LICENSE-2.0
  //
  //    Unless required by applicable law or agreed to in writing, software
  //    distributed under the License is distributed on an "AS IS" BASIS,
  //    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  //    See the License for the specific language governing permissions and
  //    limitations under the License.
  
  'use strict'
  
  var extend = require('extend')
  var cookies = require('./lib/cookies')
  var helpers = require('./lib/helpers')
  
  var paramsHaveRequestBody = helpers.paramsHaveRequestBody
  
  // organize params for patch, post, put, head, del
  function initParams (uri, options, callback) {
    if (typeof options === 'function') {
      callback = options
    }
  
    var params = {}
    if (typeof options === 'object') {
      extend(params, options, {uri: uri})
    } else if (typeof uri === 'string') {
      extend(params, {uri: uri})
    } else {
      extend(params, uri)
    }
  
    params.callback = callback || params.callback
    return params
  }
  
  function request (uri, options, callback) {
    if (typeof uri === 'undefined') {
      throw new Error('undefined is not a valid uri or options object.')
    }
  
    var params = initParams(uri, options, callback)
  
    if (params.method === 'HEAD' && paramsHaveRequestBody(params)) {
      throw new Error('HTTP HEAD requests MUST NOT include a request body.')
    }
  
    return new request.Request(params)
  }
  
  function verbFunc (verb) {
    var method = verb.toUpperCase()
    return function (uri, options, callback) {
      var params = initParams(uri, options, callback)
      params.method = method
      return request(params, params.callback)
    }
  }
  
  // define like this to please codeintel/intellisense IDEs
  request.get = verbFunc('get')
  request.head = verbFunc('head')
  request.options = verbFunc('options')
  request.post = verbFunc('post')
  request.put = verbFunc('put')
  request.patch = verbFunc('patch')
  request.del = verbFunc('delete')
  request['delete'] = verbFunc('delete')
  
  request.jar = function (store) {
    return cookies.jar(store)
  }
  
  request.cookie = function (str) {
    return cookies.parse(str)
  }
  
  function wrapRequestMethod (method, options, requester, verb) {
    return function (uri, opts, callback) {
      var params = initParams(uri, opts, callback)
  
      var target = {}
      extend(true, target, options, params)
  
      target.pool = params.pool || options.pool
  
      if (verb) {
        target.method = verb.toUpperCase()
      }
  
      if (typeof requester === 'function') {
        method = requester
      }
  
      return method(target, target.callback)
    }
  }
  
  request.defaults = function (options, requester) {
    var self = this
  
    options = options || {}
  
    if (typeof options === 'function') {
      requester = options
      options = {}
    }
  
    var defaults = wrapRequestMethod(self, options, requester)
  
    var verbs = ['get', 'head', 'post', 'put', 'patch', 'del', 'delete']
    verbs.forEach(function (verb) {
      defaults[verb] = wrapRequestMethod(self[verb], options, requester, verb)
    })
  
    defaults.cookie = wrapRequestMethod(self.cookie, options, requester)
    defaults.jar = self.jar
    defaults.defaults = self.defaults
    return defaults
  }
  
  request.forever = function (agentOptions, optionsArg) {
    var options = {}
    if (optionsArg) {
      extend(options, optionsArg)
    }
    if (agentOptions) {
      options.agentOptions = agentOptions
    }
  
    options.forever = true
    return request.defaults(options)
  }
  
  // Exports
  
  module.exports = request
  request.Request = require('./request')
  request.initParams = initParams
  
  // Backwards compatibility for request.debug
  Object.defineProperty(request, 'debug', {
    enumerable: true,
    get: function () {
      return request.Request.debug
    },
    set: function (debug) {
      request.Request.debug = debug
    }
  })