# Code coverage report for thinkjs/lib/Lib/Core/Http.js

## Statements: 99.4% (166 / 167) Branches: 100% (93 / 93) Functions: 96.88% (31 / 32) Lines: 99.4% (166 / 167) Ignored: none

All files » thinkjs/lib/Lib/Core/ » Http.js

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     /**
     * 对HttpRequest和HttpResponse 2个对象重新包装
     * @type {Object}
     */
    var querystring = require('querystring');
    var url = require('url');
    var cookie = thinkRequire('Cookie');
    var EventEmitter = require('events').EventEmitter;
    var multiparty = require('multiparty');
    var crypto = require('crypto');
    var os = require('os');
    var path = require('path');
    var fs = require('fs');

    var localIp = '127.0.0.1';
    var Http = module.exports = Class(function(){
      'use strict';
      return {
        init: function(req, res){
          this.req = req;
          this.res = res;
          //http对象为EventEmitter的实例
          this.http = new EventEmitter();
          //记录当前请求的开始时间
          this.http.startTime = Date.now();
        },
        /**
         * 执行
         * @param  {Function} callback [description]
         * @return Promise            [description]
         */
        run: function(){
          this._request();
          this._response();
          //数组的indexOf要比字符串的indexOf略快
          var methods = ['POST', 'PUT', 'PATCH'];
          if (methods.indexOf(this.req.method) > -1) {
            return this.getPostData();
          }
          return getPromise(this.http);
        },
        /**
         * 检测是否含有post数据
         * @return {Boolean} [description]
         */
        hasPostData: function(){
          if ('transfer-encoding' in this.req.headers) {
            return true;
          }
          var contentLength = this.req.headers['content-length'] | 0;
          return contentLength > 0;
        },
        /**
         * 含有文件的表单上传
         * @return {[type]} [description]
         */
        _filePost: function(){
          var deferred = getDefer();
          var self = this;
          var form = this.form = new multiparty.Form({
            maxFieldsSize: C('post_max_fields_size'),
            maxFields: C('post_max_fields'),
            maxFilesSize: C('post_max_file_size')
          });
          form.on('file', function(name, value){
            self.http.file[name] = value;
          });
          form.on('field', function(name, value){
            self.http.post[name] = value;
          });
          form.on('close', function(){
            deferred.resolve(self.http);
          });
          //有错误后直接拒绝当前请求
          form.on('error', function(){
            self.res.statusCode = 413;
            self.res.end();
          });
          form.parse(this.req);
          return deferred.promise;
        },
        /**
         * 普通的表单上传
         * @return {[type]} [description]
         */
        _commonPost: function(){
          var buffers = [];
          var length = 0;
          var self = this;
          var deferred = getDefer();
          this.req.on('data', function(chunk){
            buffers.push(chunk);
            length += chunk.length;
          });
          this.req.on('end', function(){
            self.http.payload = Buffer.concat(buffers).toString();
            tag('form_parse', self.http).then(function(){
              //默认使用querystring.parse解析
              if (isEmpty(self.http.post) && self.http.payload) {
                self.http.post = querystring.parse(self.http.payload);
              }
              var post = self.http.post;
              var length = Object.keys(post).length;
              //最大表单数超过限制
              if (length > C('post_max_fields')) {
                self.res.statusCode = 413;
                self.res.end();
                return;
              }
              for(var name in post){
                //单个表单值长度超过限制
                if (post[name].length > C('post_max_fields_size')) {
                  self.res.statusCode = 413;
                  self.res.end();
                  return;
                }
              }
              deferred.resolve(self.http);
            })
          });
          return deferred.promise;
        },
        /**
         * 通过ajax上传文件
         * @return {[type]} [description]
         */
        _ajaxFilePost: function(){
          var self = this;
          var filename = this.req.headers[C('post_ajax_filename_header')];
          var deferred = getDefer();
          var filepath = os.tmpdir() + '/thinkjs_upload/';
          var name = crypto.randomBytes(20).toString('base64').replace(/\+/g, '_').replace(/\//g, '-');
          mkdir(filepath);
          filepath += name + path.extname(filename);
          var stream = fs.createWriteStream(filepath);
          this.req.pipe(stream);
          stream.on('error', function(err){
            deferred.reject(err);
          })
          stream.on('close', function(){
            self.http.file.file = {
              fieldName: 'file',
              originalFilename: filename,
              path: filepath,
              size: fs.statSync(filepath).size
            }
            deferred.resolve(self.http);
          })
          return deferred.promise;
        },
        /**
         * 获取POST过来的数据，包含上传的文件
         * 依赖multiparty库
         * @return {[type]}            [description]
         */
        getPostData: function(){
          //没有post数据，直接返回
          if (!this.hasPostData()) {
            return getPromise(this.http);
          }
          //上传的数据中是否含有文件的检测正则
          var multiReg = /^multipart\/(form-data|related);\s*boundary=(?:"([^"]+)"|([^;]+))$/i;
          if (multiReg.test(this.req.headers['content-type'])) {
            return this._filePost();
          }else if(this.req.headers[C('post_ajax_filename_header')]){ //通过ajax上传文件
            return this._ajaxFilePost();
          }else{
            return this._commonPost();
          }
        },
        /**
         * HttpRequest增强
         * @return {[type]} [description]
         */
        _request: function(){
          var req = {
            //http版本号
            version: this.req.httpVersion,
            //请求方法
            method: this.req.method,
            //请求头
            headers: this.req.headers,
            getHeader: function(name){
              return this.headers[name] || '';
            },
            //请求的Content-Type
            contentType: (this.req.headers['content-type'] || '').split(';')[0].trim(),
            //post信息
            post: {},
            //上传的文件信息
            file: {},
            //请求用户的ip
            ip: function(){
              var connection = this.req.connection;
              var socket = this.req.socket;
              if (connection && connection.remoteAddress !== localIp) {
                return connection.remoteAddress;
              }else if (socket && socket.remoteAddress !== localIp) {
                return socket.remoteAddress;
              }
              return this.headers['x-forwarded-for'] || this.headers['x-real-ip'] || localIp;
            },
            //请求的cookie
            cookie: cookie.parse(this.req.headers.cookie || '')
          };
          extend(this.http, req);

          //解析url中的参数
          var urlInfo = url.parse('//' + req.headers.host + this.req.url, true, true);
          this.http.pathname = urlInfo.pathname;
          //query只记录?后面的参数
          this.http.query = urlInfo.query;
          //get包含路由解析追加的参数
          this.http.get = extend({}, urlInfo.query);
          //主机名，带端口
          this.http.host = urlInfo.host;
          //主机名，不带端口
          this.http.hostname = urlInfo.hostname;
          //将原生的request对象放在http上，方便后续在controller等地方使用
          this.http.req = this.req;
        },
        /**
         * HttpResponse增强
         * @return {[type]} [description]
         */
        _response: function(){
          var res = {
            /**
             * 一次请求下，可能会发送多个Cookie，所以这里不能立即发送
             * 需要临时存起来，到输出内容前统一发送
             * @type {Object}
             */
            _cookie: {},
            /**
             * 发送header
             * @param {[type]} name  [description]
             * @param {[type]} value [description]
             */
            setHeader: function(name, value){
              if (!this.res.headersSent) {
                this.res.setHeader(name, value);
              }
            },
            /**
             * 设置cookie
             * @param {[type]} name    [description]
             * @param {[type]} value   [description]
             * @param {[type]} options [description]
             */
            setCookie: function(name, value, options){
              options = options || {};
              if (typeof options === 'number') {
                options = {timeout: options};
              }
              var timeout = options.timeout;
              if (timeout === undefined) {
                timeout = C('cookie_timeout');
              }
              //delete options.timeout;
              //if value is null, remove cookie
              if (value === null) {
                timeout = -1000;
              }
              var defaultOptions = {
                path: C('cookie_path'),
                domain: C('cookie_domain'),
                expires: new Date (Date.now() + timeout * 1000)
              };
              if (timeout === 0) {
                delete defaultOptions.expires;
              }
              for(var key in options){
                defaultOptions[key.toLowerCase()] = options[key];
              }
              defaultOptions.name = name;
              defaultOptions.value = value + '';
              this._cookie[name] = defaultOptions;
            },
            /**
             * 将队列中的cookie发送出去
             * @return {[type]} [description]
             */
            sendCookie: function(){
              var cookies = Object.values(this._cookie).map(function(item){
                return cookie.stringify(item.name, item.value, item);
              });
              if (cookies.length) {
                this.setHeader('Set-Cookie', cookies);
                this._cookie = {};
              }
            },
            /**
             * url跳转
             * @param  {[type]} url  [description]
             * @param  {[type]} code [description]
             * @return {[type]}      [description]
             */
            redirect: function(url, code){
              this.res.statusCode = code || 302;
              this.setHeader('Location', url || '/');
              this.end();
            },
            /**
             * 发送执行时间
             * @param  {[type]} name [description]
             * @return {[type]}      [description]
             */
            sendTime: function(name){
              var time = Date.now() - this.startTime;
              this.setHeader('X-' + (name || 'EXEC-TIME'), time + 'ms');
            },
            /**
             * 输出内容
             * @param  {[type]} obj      [description]
             * @param  {[type]} encoding [description]
             * @return {[type]}          [description]
             */
            echo: function(obj, encoding){
              this.sendCookie();
              if (obj === undefined) {
                return;
              }
              if (isArray(obj) || isObject(obj)) {
                obj = JSON.stringify(obj);
              }
              if (!isString(obj) && !isBuffer(obj)) {
                obj += '';
              }
              var self = this;
              return tag('content_write', this, obj).then(function(obj){
                if (isBuffer(obj)) {
                  self.res.write(obj);
                }else{
                  self.res.write(obj, encoding || C('encoding'));
                }
                return obj;
              })
            },
            /**
             * 结束URL
             * @return {[type]} [description]
             */
            end: function(){
              this.emit('beforeEnd', this);
              this.sendCookie();
              this.res.end();
              this.emit('afterEnd', this);
            }
          };
          extend(this.http, res);
          //将原生的response对象放在http上，方便后续controller等地方使用
          this.http.res = this.res;
        }
      };
    });
    /**
     * 获取默认的http信息
     * @param  {[type]} data [description]
     * @return {[type]}      [description]
     */
    Http.getDefaultHttp = function(data){
      'use strict';
      data = data || {};
      if (isString(data)) {
        if (data[0] === '{') {
          data = JSON.parse(data);
        }else if (/^[\w]+\=/.test(data)) {
          data = querystring.parse(data);
        }else{
          data = {url: data};
        }
      }
      var url = data.url || '';
      if (url.indexOf('/') !== 0) {
        url = '/' + url;
      }
      return {
        req: {
          httpVersion: '1.1',
          method: (data.method || 'GET').toUpperCase(),
          url: url,
          headers: extend({
            host: data.host || localIp
          }, data.headers),
          connection: {
            remoteAddress: data.ip || localIp
          }
        },
        res: {
          end: data.end || data.close || Http.empty,
          write: data.write || data.send || Http.empty,
          setHeader: Http.empty
        }
      };
    };
    /**
     * 空函数
     * @return {[type]} [description]
     */
    Http.empty = function(data){
      'use strict';
      return data;
    }