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7 | 'use strict'
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8 |
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12 |
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13 |
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14 | var createError = require('http-errors')
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15 | var getBody = require('raw-body')
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16 | var iconv = require('iconv-lite')
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17 | var onFinished = require('on-finished')
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18 | var zlib = require('zlib')
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19 |
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20 |
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21 |
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22 |
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23 |
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24 | module.exports = read
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25 |
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26 |
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27 |
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35 |
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36 |
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37 |
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38 | function read (req, res, next, parse, debug, options) {
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39 | var length
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40 | var opts = options
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41 | var stream
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42 |
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43 |
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44 | req._body = true
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45 |
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46 |
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47 | var encoding = opts.encoding !== null
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48 | ? opts.encoding
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49 | : null
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50 | var verify = opts.verify
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51 |
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52 | try {
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53 |
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54 | stream = contentstream(req, debug, opts.inflate)
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55 | length = stream.length
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56 | stream.length = undefined
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57 | } catch (err) {
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58 | return next(err)
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59 | }
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60 |
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61 |
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62 | opts.length = length
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63 | opts.encoding = verify
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64 | ? null
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65 | : encoding
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66 |
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67 |
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68 | if (opts.encoding === null && encoding !== null && !iconv.encodingExists(encoding)) {
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69 | return next(createError(415, 'unsupported charset "' + encoding.toUpperCase() + '"', {
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70 | charset: encoding.toLowerCase(),
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71 | type: 'charset.unsupported'
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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 | debug('read body')
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77 | getBody(stream, opts, function (error, body) {
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78 | if (error) {
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79 | var _error
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80 |
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81 | if (error.type === 'encoding.unsupported') {
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82 |
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83 | _error = createError(415, 'unsupported charset "' + encoding.toUpperCase() + '"', {
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84 | charset: encoding.toLowerCase(),
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85 | type: 'charset.unsupported'
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86 | })
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87 | } else {
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88 |
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89 | _error = createError(400, error)
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90 | }
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91 |
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92 |
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93 | stream.resume()
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94 | onFinished(req, function onfinished () {
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95 | next(createError(400, _error))
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96 | })
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97 | return
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98 | }
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99 |
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100 |
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101 | if (verify) {
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102 | try {
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103 | debug('verify body')
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104 | verify(req, res, body, encoding)
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105 | } catch (err) {
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106 | next(createError(403, err, {
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107 | body: body,
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108 | type: err.type || 'entity.verify.failed'
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109 | }))
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110 | return
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111 | }
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112 | }
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113 |
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114 |
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115 | var str = body
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116 | try {
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117 | debug('parse body')
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118 | str = typeof body !== 'string' && encoding !== null
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119 | ? iconv.decode(body, encoding)
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120 | : body
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121 | req.body = parse(str)
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122 | } catch (err) {
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123 | next(createError(400, err, {
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124 | body: str,
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125 | type: err.type || 'entity.parse.failed'
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126 | }))
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127 | return
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128 | }
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129 |
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130 | next()
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131 | })
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132 | }
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133 |
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134 |
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135 |
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136 |
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137 |
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138 |
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139 |
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140 |
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141 |
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142 |
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143 |
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144 | function contentstream (req, debug, inflate) {
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145 | var encoding = (req.headers['content-encoding'] || 'identity').toLowerCase()
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146 | var length = req.headers['content-length']
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147 | var stream
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148 |
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149 | debug('content-encoding "%s"', encoding)
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150 |
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151 | if (inflate === false && encoding !== 'identity') {
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152 | throw createError(415, 'content encoding unsupported', {
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153 | encoding: encoding,
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154 | type: 'encoding.unsupported'
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155 | })
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156 | }
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157 |
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158 | switch (encoding) {
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159 | case 'deflate':
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160 | stream = zlib.createInflate()
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161 | debug('inflate body')
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162 | req.pipe(stream)
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163 | break
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164 | case 'gzip':
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165 | stream = zlib.createGunzip()
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166 | debug('gunzip body')
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167 | req.pipe(stream)
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168 | break
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169 | case 'identity':
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170 | stream = req
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171 | stream.length = length
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172 | break
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173 | default:
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174 | throw createError(415, 'unsupported content encoding "' + encoding + '"', {
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175 | encoding: encoding,
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176 | type: 'encoding.unsupported'
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177 | })
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178 | }
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179 |
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180 | return stream
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181 | }
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