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7
| /**
* 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;
}
|