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7 |
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8 | 'use strict';
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9 |
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10 |
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11 |
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12 |
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13 |
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14 |
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15 | var contentDisposition = require('content-disposition');
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16 | var deprecate = require('depd')('express');
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17 | var encodeUrl = require('encodeurl');
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18 | var escapeHtml = require('escape-html');
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19 | var http = require('http');
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20 | var isAbsolute = require('./utils').isAbsolute;
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21 | var onFinished = require('on-finished');
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22 | var path = require('path');
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23 | var statuses = require('statuses')
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24 | var merge = require('utils-merge');
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25 | var sign = require('cookie-signature').sign;
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26 | var normalizeType = require('./utils').normalizeType;
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27 | var normalizeTypes = require('./utils').normalizeTypes;
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28 | var setCharset = require('./utils').setCharset;
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29 | var cookie = require('cookie');
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30 | var send = require('send');
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31 | var extname = path.extname;
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32 | var mime = send.mime;
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33 | var resolve = path.resolve;
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34 | var vary = require('vary');
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35 |
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36 |
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37 |
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38 |
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39 |
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40 |
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41 | var res = Object.create(http.ServerResponse.prototype)
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42 |
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43 |
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44 |
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45 |
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46 |
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47 |
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48 | module.exports = res
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49 |
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50 |
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51 |
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52 |
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53 |
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54 |
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55 | var charsetRegExp = /;\s*charset\s*=/;
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56 |
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57 |
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58 |
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59 |
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60 |
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61 |
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62 |
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63 |
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64 |
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65 | res.status = function status(code) {
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66 | this.statusCode = code;
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67 | return this;
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68 | };
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69 |
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70 |
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71 |
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72 |
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73 |
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74 |
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75 |
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76 |
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77 |
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78 |
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79 |
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80 |
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81 |
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82 |
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83 |
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84 |
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85 | res.links = function(links){
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86 | var link = this.get('Link') || '';
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87 | if (link) link += ', ';
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88 | return this.set('Link', link + Object.keys(links).map(function(rel){
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89 | return '<' + links[rel] + '>; rel="' + rel + '"';
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90 | }).join(', '));
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91 | };
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92 |
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93 |
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94 |
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95 |
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96 |
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97 |
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98 |
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99 |
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100 |
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101 |
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102 |
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103 |
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104 |
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105 |
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106 | res.send = function send(body) {
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107 | var chunk = body;
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108 | var encoding;
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109 | var len;
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110 | var req = this.req;
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111 | var type;
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112 |
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113 |
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114 | var app = this.app;
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115 |
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116 |
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117 | if (arguments.length === 2) {
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118 |
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119 | if (typeof arguments[0] !== 'number' && typeof arguments[1] === 'number') {
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120 | deprecate('res.send(body, status): Use res.status(status).send(body) instead');
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121 | this.statusCode = arguments[1];
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122 | } else {
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123 | deprecate('res.send(status, body): Use res.status(status).send(body) instead');
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124 | this.statusCode = arguments[0];
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125 | chunk = arguments[1];
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126 | }
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127 | }
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128 |
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129 |
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130 | if (typeof chunk === 'number' && arguments.length === 1) {
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131 |
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132 | if (!this.get('Content-Type')) {
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133 | this.type('txt');
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134 | }
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135 |
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136 | deprecate('res.send(status): Use res.sendStatus(status) instead');
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137 | this.statusCode = chunk;
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138 | chunk = statuses[chunk]
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139 | }
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140 |
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141 | switch (typeof chunk) {
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142 |
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143 | case 'string':
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144 | if (!this.get('Content-Type')) {
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145 | this.type('html');
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146 | }
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147 | break;
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148 | case 'boolean':
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149 | case 'number':
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150 | case 'object':
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151 | if (chunk === null) {
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152 | chunk = '';
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153 | } else if (Buffer.isBuffer(chunk)) {
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154 | if (!this.get('Content-Type')) {
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155 | this.type('bin');
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156 | }
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157 | } else {
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158 | return this.json(chunk);
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159 | }
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160 | break;
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161 | }
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162 |
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163 |
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164 | if (typeof chunk === 'string') {
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165 | encoding = 'utf8';
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166 | type = this.get('Content-Type');
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167 |
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168 |
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169 | if (typeof type === 'string') {
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170 | this.set('Content-Type', setCharset(type, 'utf-8'));
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171 | }
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172 | }
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173 |
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174 |
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175 | if (chunk !== undefined) {
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176 | if (!Buffer.isBuffer(chunk)) {
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177 |
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178 | chunk = new Buffer(chunk, encoding);
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179 | encoding = undefined;
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180 | }
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181 |
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182 | len = chunk.length;
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183 | this.set('Content-Length', len);
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184 | }
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185 |
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186 |
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187 | var etag;
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188 | var generateETag = len !== undefined && app.get('etag fn');
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189 | if (typeof generateETag === 'function' && !this.get('ETag')) {
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190 | if ((etag = generateETag(chunk, encoding))) {
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191 | this.set('ETag', etag);
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192 | }
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193 | }
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194 |
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195 |
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196 | if (req.fresh) this.statusCode = 304;
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197 |
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198 |
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199 | if (204 === this.statusCode || 304 === this.statusCode) {
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200 | this.removeHeader('Content-Type');
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201 | this.removeHeader('Content-Length');
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202 | this.removeHeader('Transfer-Encoding');
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203 | chunk = '';
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204 | }
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205 |
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206 | if (req.method === 'HEAD') {
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207 |
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208 | this.end();
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209 | } else {
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210 |
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211 | this.end(chunk, encoding);
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212 | }
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213 |
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214 | return this;
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215 | };
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216 |
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217 |
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218 |
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219 |
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220 |
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221 |
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222 |
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223 |
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224 |
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225 |
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226 |
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227 |
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228 |
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229 | res.json = function json(obj) {
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230 | var val = obj;
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231 |
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232 |
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233 | if (arguments.length === 2) {
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234 |
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235 | if (typeof arguments[1] === 'number') {
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236 | deprecate('res.json(obj, status): Use res.status(status).json(obj) instead');
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237 | this.statusCode = arguments[1];
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238 | } else {
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239 | deprecate('res.json(status, obj): Use res.status(status).json(obj) instead');
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240 | this.statusCode = arguments[0];
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241 | val = arguments[1];
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242 | }
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243 | }
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244 |
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245 |
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246 | var app = this.app;
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247 | var replacer = app.get('json replacer');
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248 | var spaces = app.get('json spaces');
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249 | var body = stringify(val, replacer, spaces);
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250 |
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251 |
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252 | if (!this.get('Content-Type')) {
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253 | this.set('Content-Type', 'application/json');
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254 | }
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255 |
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256 | return this.send(body);
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257 | };
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258 |
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259 |
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260 |
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261 |
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262 |
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263 |
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264 |
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265 |
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266 |
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267 |
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268 |
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269 |
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270 |
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271 | res.jsonp = function jsonp(obj) {
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272 | var val = obj;
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273 |
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274 |
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275 | if (arguments.length === 2) {
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276 |
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277 | if (typeof arguments[1] === 'number') {
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278 | deprecate('res.jsonp(obj, status): Use res.status(status).json(obj) instead');
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279 | this.statusCode = arguments[1];
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280 | } else {
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281 | deprecate('res.jsonp(status, obj): Use res.status(status).jsonp(obj) instead');
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282 | this.statusCode = arguments[0];
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283 | val = arguments[1];
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284 | }
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285 | }
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286 |
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287 |
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288 | var app = this.app;
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289 | var replacer = app.get('json replacer');
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290 | var spaces = app.get('json spaces');
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291 | var body = stringify(val, replacer, spaces);
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292 | var callback = this.req.query[app.get('jsonp callback name')];
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293 |
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294 |
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295 | if (!this.get('Content-Type')) {
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296 | this.set('X-Content-Type-Options', 'nosniff');
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297 | this.set('Content-Type', 'application/json');
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298 | }
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299 |
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300 |
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301 | if (Array.isArray(callback)) {
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302 | callback = callback[0];
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303 | }
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304 |
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305 |
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306 | if (typeof callback === 'string' && callback.length !== 0) {
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307 | this.charset = 'utf-8';
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308 | this.set('X-Content-Type-Options', 'nosniff');
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309 | this.set('Content-Type', 'text/javascript');
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310 |
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311 |
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312 | callback = callback.replace(/[^\[\]\w$.]/g, '');
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313 |
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314 |
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315 | body = body
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316 | .replace(/\u2028/g, '\\u2028')
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317 | .replace(/\u2029/g, '\\u2029');
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318 |
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319 |
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320 |
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321 | body = '/**/ typeof ' + callback + ' === \'function\' && ' + callback + '(' + body + ');';
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322 | }
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323 |
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324 | return this.send(body);
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325 | };
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326 |
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327 |
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328 |
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329 |
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330 |
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331 |
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332 |
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333 |
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334 |
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335 |
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336 |
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337 |
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338 |
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339 |
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340 |
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341 |
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342 | res.sendStatus = function sendStatus(statusCode) {
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343 | var body = statuses[statusCode] || String(statusCode)
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344 |
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345 | this.statusCode = statusCode;
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346 | this.type('txt');
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347 |
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348 | return this.send(body);
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349 | };
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350 |
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351 |
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352 |
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353 |
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354 |
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384 |
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385 |
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386 |
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387 |
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388 |
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389 |
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390 |
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391 |
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392 | res.sendFile = function sendFile(path, options, callback) {
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393 | var done = callback;
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394 | var req = this.req;
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395 | var res = this;
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396 | var next = req.next;
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397 | var opts = options || {};
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398 |
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399 | if (!path) {
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400 | throw new TypeError('path argument is required to res.sendFile');
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401 | }
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402 |
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403 |
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404 | if (typeof options === 'function') {
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405 | done = options;
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406 | opts = {};
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407 | }
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408 |
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409 | if (!opts.root && !isAbsolute(path)) {
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410 | throw new TypeError('path must be absolute or specify root to res.sendFile');
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411 | }
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412 |
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413 |
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414 | var pathname = encodeURI(path);
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415 | var file = send(req, pathname, opts);
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416 |
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417 |
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418 | sendfile(res, file, opts, function (err) {
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419 | if (done) return done(err);
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420 | if (err && err.code === 'EISDIR') return next();
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421 |
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422 |
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423 | if (err && err.code !== 'ECONNABORTED' && err.syscall !== 'write') {
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424 | next(err);
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425 | }
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426 | });
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427 | };
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428 |
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429 |
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430 |
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431 |
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432 |
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464 |
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465 |
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466 |
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467 |
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468 |
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469 |
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470 | res.sendfile = function (path, options, callback) {
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471 | var done = callback;
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472 | var req = this.req;
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473 | var res = this;
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474 | var next = req.next;
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475 | var opts = options || {};
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476 |
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477 |
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478 | if (typeof options === 'function') {
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479 | done = options;
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480 | opts = {};
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481 | }
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482 |
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483 |
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484 | var file = send(req, path, opts);
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485 |
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486 |
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487 | sendfile(res, file, opts, function (err) {
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488 | if (done) return done(err);
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489 | if (err && err.code === 'EISDIR') return next();
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490 |
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491 |
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492 | if (err && err.code !== 'ECONNABORT' && err.syscall !== 'write') {
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493 | next(err);
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494 | }
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495 | });
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496 | };
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497 |
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498 | res.sendfile = deprecate.function(res.sendfile,
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499 | 'res.sendfile: Use res.sendFile instead');
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500 |
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501 |
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502 |
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503 |
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504 |
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505 |
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506 |
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507 |
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508 |
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509 |
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510 |
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511 |
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512 |
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513 |
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514 | res.download = function download(path, filename, callback) {
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515 | var done = callback;
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516 | var name = filename;
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517 |
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518 |
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519 | if (typeof filename === 'function') {
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520 | done = filename;
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521 | name = null;
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522 | }
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523 |
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524 |
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525 | var headers = {
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526 | 'Content-Disposition': contentDisposition(name || path)
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527 | };
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528 |
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529 |
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530 | var fullPath = resolve(path);
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531 |
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532 | return this.sendFile(fullPath, { headers: headers }, done);
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533 | };
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534 |
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535 |
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536 |
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537 |
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538 |
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539 |
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540 |
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541 |
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542 |
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543 |
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544 |
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545 |
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546 |
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547 |
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548 |
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549 |
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550 |
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551 |
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552 | res.contentType =
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553 | res.type = function contentType(type) {
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554 | var ct = type.indexOf('/') === -1
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555 | ? mime.lookup(type)
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556 | : type;
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557 |
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558 | return this.set('Content-Type', ct);
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559 | };
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560 |
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561 |
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562 |
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563 |
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564 |
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610 |
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611 |
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612 |
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613 |
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614 |
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615 |
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616 |
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617 |
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618 | res.format = function(obj){
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619 | var req = this.req;
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620 | var next = req.next;
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621 |
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622 | var fn = obj.default;
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623 | if (fn) delete obj.default;
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624 | var keys = Object.keys(obj);
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625 |
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626 | var key = keys.length > 0
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627 | ? req.accepts(keys)
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628 | : false;
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629 |
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630 | this.vary("Accept");
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631 |
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632 | if (key) {
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633 | this.set('Content-Type', normalizeType(key).value);
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634 | obj[key](req, this, next);
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635 | } else if (fn) {
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636 | fn();
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637 | } else {
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638 | var err = new Error('Not Acceptable');
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639 | err.status = err.statusCode = 406;
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640 | err.types = normalizeTypes(keys).map(function(o){ return o.value });
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641 | next(err);
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642 | }
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643 |
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644 | return this;
|
645 | };
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646 |
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647 |
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648 |
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649 |
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650 |
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651 |
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652 |
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653 |
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654 |
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655 | res.attachment = function attachment(filename) {
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656 | if (filename) {
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657 | this.type(extname(filename));
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658 | }
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659 |
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660 | this.set('Content-Disposition', contentDisposition(filename));
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661 |
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662 | return this;
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663 | };
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664 |
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665 |
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666 |
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667 |
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668 |
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670 |
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671 |
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672 |
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673 |
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674 |
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675 |
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676 |
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677 |
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678 |
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679 |
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680 | res.append = function append(field, val) {
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681 | var prev = this.get(field);
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682 | var value = val;
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683 |
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684 | if (prev) {
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685 |
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686 | value = Array.isArray(prev) ? prev.concat(val)
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687 | : Array.isArray(val) ? [prev].concat(val)
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688 | : [prev, val];
|
689 | }
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690 |
|
691 | return this.set(field, value);
|
692 | };
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693 |
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694 |
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695 |
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696 |
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697 |
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698 |
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699 |
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700 |
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701 |
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702 |
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703 |
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704 |
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705 |
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706 |
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707 |
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708 |
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709 |
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710 |
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711 |
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712 | res.set =
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713 | res.header = function header(field, val) {
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714 | if (arguments.length === 2) {
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715 | var value = Array.isArray(val)
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716 | ? val.map(String)
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717 | : String(val);
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718 |
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719 |
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720 | if (field.toLowerCase() === 'content-type' && !charsetRegExp.test(value)) {
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721 | var charset = mime.charsets.lookup(value.split(';')[0]);
|
722 | if (charset) value += '; charset=' + charset.toLowerCase();
|
723 | }
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724 |
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725 | this.setHeader(field, value);
|
726 | } else {
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727 | for (var key in field) {
|
728 | this.set(key, field[key]);
|
729 | }
|
730 | }
|
731 | return this;
|
732 | };
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733 |
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734 |
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735 |
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736 |
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737 |
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738 |
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739 |
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740 |
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741 |
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742 | res.get = function(field){
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743 | return this.getHeader(field);
|
744 | };
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745 |
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746 |
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747 |
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748 |
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749 |
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750 |
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751 |
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752 |
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753 |
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754 |
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755 | res.clearCookie = function clearCookie(name, options) {
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756 | var opts = merge({ expires: new Date(1), path: '/' }, options);
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757 |
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758 | return this.cookie(name, '', opts);
|
759 | };
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760 |
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761 |
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762 |
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763 |
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764 |
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765 |
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766 |
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767 |
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776 |
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777 |
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778 |
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779 |
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780 |
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781 |
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782 |
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783 |
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784 |
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785 | res.cookie = function (name, value, options) {
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786 | var opts = merge({}, options);
|
787 | var secret = this.req.secret;
|
788 | var signed = opts.signed;
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789 |
|
790 | if (signed && !secret) {
|
791 | throw new Error('cookieParser("secret") required for signed cookies');
|
792 | }
|
793 |
|
794 | var val = typeof value === 'object'
|
795 | ? 'j:' + JSON.stringify(value)
|
796 | : String(value);
|
797 |
|
798 | if (signed) {
|
799 | val = 's:' + sign(val, secret);
|
800 | }
|
801 |
|
802 | if ('maxAge' in opts) {
|
803 | opts.expires = new Date(Date.now() + opts.maxAge);
|
804 | opts.maxAge /= 1000;
|
805 | }
|
806 |
|
807 | if (opts.path == null) {
|
808 | opts.path = '/';
|
809 | }
|
810 |
|
811 | this.append('Set-Cookie', cookie.serialize(name, String(val), opts));
|
812 |
|
813 | return this;
|
814 | };
|
815 |
|
816 |
|
817 |
|
818 |
|
819 |
|
820 |
|
821 |
|
822 |
|
823 |
|
824 |
|
825 |
|
826 |
|
827 |
|
828 |
|
829 |
|
830 |
|
831 |
|
832 |
|
833 | res.location = function location(url) {
|
834 | var loc = url;
|
835 |
|
836 |
|
837 | if (url === 'back') {
|
838 | loc = this.req.get('Referrer') || '/';
|
839 | }
|
840 |
|
841 |
|
842 | return this.set('Location', encodeUrl(loc));
|
843 | };
|
844 |
|
845 |
|
846 |
|
847 |
|
848 |
|
849 |
|
850 |
|
851 |
|
852 |
|
853 |
|
854 |
|
855 |
|
856 |
|
857 |
|
858 |
|
859 |
|
860 |
|
861 |
|
862 |
|
863 | res.redirect = function redirect(url) {
|
864 | var address = url;
|
865 | var body;
|
866 | var status = 302;
|
867 |
|
868 |
|
869 | if (arguments.length === 2) {
|
870 | if (typeof arguments[0] === 'number') {
|
871 | status = arguments[0];
|
872 | address = arguments[1];
|
873 | } else {
|
874 | deprecate('res.redirect(url, status): Use res.redirect(status, url) instead');
|
875 | status = arguments[1];
|
876 | }
|
877 | }
|
878 |
|
879 |
|
880 | address = this.location(address).get('Location');
|
881 |
|
882 |
|
883 | this.format({
|
884 | text: function(){
|
885 | body = statuses[status] + '. Redirecting to ' + address
|
886 | },
|
887 |
|
888 | html: function(){
|
889 | var u = escapeHtml(address);
|
890 | body = '<p>' + statuses[status] + '. Redirecting to <a href="' + u + '">' + u + '</a></p>'
|
891 | },
|
892 |
|
893 | default: function(){
|
894 | body = '';
|
895 | }
|
896 | });
|
897 |
|
898 |
|
899 | this.statusCode = status;
|
900 | this.set('Content-Length', Buffer.byteLength(body));
|
901 |
|
902 | if (this.req.method === 'HEAD') {
|
903 | this.end();
|
904 | } else {
|
905 | this.end(body);
|
906 | }
|
907 | };
|
908 |
|
909 |
|
910 |
|
911 |
|
912 |
|
913 |
|
914 |
|
915 |
|
916 |
|
917 |
|
918 | res.vary = function(field){
|
919 |
|
920 | if (!field || (Array.isArray(field) && !field.length)) {
|
921 | deprecate('res.vary(): Provide a field name');
|
922 | return this;
|
923 | }
|
924 |
|
925 | vary(this, field);
|
926 |
|
927 | return this;
|
928 | };
|
929 |
|
930 |
|
931 |
|
932 |
|
933 |
|
934 |
|
935 |
|
936 |
|
937 |
|
938 |
|
939 |
|
940 |
|
941 |
|
942 |
|
943 | res.render = function render(view, options, callback) {
|
944 | var app = this.req.app;
|
945 | var done = callback;
|
946 | var opts = options || {};
|
947 | var req = this.req;
|
948 | var self = this;
|
949 |
|
950 |
|
951 | if (typeof options === 'function') {
|
952 | done = options;
|
953 | opts = {};
|
954 | }
|
955 |
|
956 |
|
957 | opts._locals = self.locals;
|
958 |
|
959 |
|
960 | done = done || function (err, str) {
|
961 | if (err) return req.next(err);
|
962 | self.send(str);
|
963 | };
|
964 |
|
965 |
|
966 | app.render(view, opts, done);
|
967 | };
|
968 |
|
969 |
|
970 | function sendfile(res, file, options, callback) {
|
971 | var done = false;
|
972 | var streaming;
|
973 |
|
974 |
|
975 | function onaborted() {
|
976 | if (done) return;
|
977 | done = true;
|
978 |
|
979 | var err = new Error('Request aborted');
|
980 | err.code = 'ECONNABORTED';
|
981 | callback(err);
|
982 | }
|
983 |
|
984 |
|
985 | function ondirectory() {
|
986 | if (done) return;
|
987 | done = true;
|
988 |
|
989 | var err = new Error('EISDIR, read');
|
990 | err.code = 'EISDIR';
|
991 | callback(err);
|
992 | }
|
993 |
|
994 |
|
995 | function onerror(err) {
|
996 | if (done) return;
|
997 | done = true;
|
998 | callback(err);
|
999 | }
|
1000 |
|
1001 |
|
1002 | function onend() {
|
1003 | if (done) return;
|
1004 | done = true;
|
1005 | callback();
|
1006 | }
|
1007 |
|
1008 |
|
1009 | function onfile() {
|
1010 | streaming = false;
|
1011 | }
|
1012 |
|
1013 |
|
1014 | function onfinish(err) {
|
1015 | if (err && err.code === 'ECONNRESET') return onaborted();
|
1016 | if (err) return onerror(err);
|
1017 | if (done) return;
|
1018 |
|
1019 | setImmediate(function () {
|
1020 | if (streaming !== false && !done) {
|
1021 | onaborted();
|
1022 | return;
|
1023 | }
|
1024 |
|
1025 | if (done) return;
|
1026 | done = true;
|
1027 | callback();
|
1028 | });
|
1029 | }
|
1030 |
|
1031 |
|
1032 | function onstream() {
|
1033 | streaming = true;
|
1034 | }
|
1035 |
|
1036 | file.on('directory', ondirectory);
|
1037 | file.on('end', onend);
|
1038 | file.on('error', onerror);
|
1039 | file.on('file', onfile);
|
1040 | file.on('stream', onstream);
|
1041 | onFinished(res, onfinish);
|
1042 |
|
1043 | if (options.headers) {
|
1044 |
|
1045 | file.on('headers', function headers(res) {
|
1046 | var obj = options.headers;
|
1047 | var keys = Object.keys(obj);
|
1048 |
|
1049 | for (var i = 0; i < keys.length; i++) {
|
1050 | var k = keys[i];
|
1051 | res.setHeader(k, obj[k]);
|
1052 | }
|
1053 | });
|
1054 | }
|
1055 |
|
1056 |
|
1057 | file.pipe(res);
|
1058 | }
|
1059 |
|
1060 |
|
1061 |
|
1062 |
|
1063 |
|
1064 |
|
1065 | function stringify(value, replacer, spaces) {
|
1066 |
|
1067 |
|
1068 | return replacer || spaces
|
1069 | ? JSON.stringify(value, replacer, spaces)
|
1070 | : JSON.stringify(value);
|
1071 | }
|