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annotate src/goodjava/webserver/RequestParser.java @ 1660:2968e43cdd44

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manual work
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 19 Apr 2022 23:46:06 -0600
parents fa066aaa068c
children a02a75e3daa8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package goodjava.webserver;
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2
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3 import java.io.UnsupportedEncodingException;
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4 import java.net.URLDecoder;
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5 import java.util.List;
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6 import java.util.ArrayList;
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7 import goodjava.logging.Logger;
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8 import goodjava.logging.LoggerFactory;
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9 import goodjava.parser.Parser;
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10 import goodjava.parser.ParseException;
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11
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12
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13 final class RequestParser {
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14 private static final Logger logger = LoggerFactory.getLogger(RequestParser.class);
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15 private final Request request;
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16 private Parser parser;
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17
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18 RequestParser(Request request) {
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19 this.request = request;
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20 }
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21
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22 void parseUrlencoded(String charset) throws ParseException, UnsupportedEncodingException {
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23 if( request.body == null ) {
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24 logger.warn("body is null\n"+request.rawHead);
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25 return;
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26 }
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27 this.parser = new Parser(Util.toString(request.body,charset));
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28 parseQuery();
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29 require( parser.endOfInput() );
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30 }
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31
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32 void parseHead() throws ParseException {
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33 this.parser = new Parser(request.rawHead);
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34 parseRequestLine();
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35 while( !parser.match("\r\n") ) {
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36 parserHeaderField();
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37 }
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38 parseCookies();
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39 }
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40
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41 private void parseRequestLine() throws ParseException {
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42 parseMethod();
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43 require( parser.match(' ') );
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44 parseRawPath();
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45 require( parser.match(' ') );
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46 parseProtocol();
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47 require( parser.match("\r\n") );
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48 }
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49
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50 private void parseMethod() throws ParseException {
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51 int start = parser.currentIndex();
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52 if( !methodChar() )
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53 throw new ParseException(parser,"no method");
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54 while( methodChar() );
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55 request.method = parser.textFrom(start);
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56 }
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57
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58 private boolean methodChar() {
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59 return parser.inCharRange('A','Z');
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60 }
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61
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62 private void parseRawPath() throws ParseException {
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63 int start = parser.currentIndex();
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64 parsePath();
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65 if( parser.match('?') )
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66 parseQuery();
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67 request.rawPath = parser.textFrom(start);
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68 }
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69
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70 private void parsePath() throws ParseException {
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71 int start = parser.currentIndex();
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72 if( !parser.match('/') )
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73 throw new ParseException(parser,"bad path");
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74 while( parser.noneOf(" ?#") );
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75 request.path = urlDecode( parser.textFrom(start) );
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76 request.originalPath = request.path;
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77 }
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78
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79 private void parseQuery() throws ParseException {
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80 do {
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81 int start = parser.currentIndex();
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82 while( queryChar() );
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83 String name = urlDecode( parser.textFrom(start) );
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84 String value = null;
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85 if( parser.match('=') ) {
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86 start = parser.currentIndex();
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87 while( queryChar() || parser.match('=') );
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88 value = urlDecode( parser.textFrom(start) );
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89 }
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90 if( name.length() > 0 || value != null ) {
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91 if( value==null )
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92 value = "";
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93 Util.add(request.parameters,name,value);
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94 }
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95 } while( parser.match('&') );
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96 }
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97
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98 private boolean queryChar() {
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99 return parser.noneOf("=&# \t\n\f\r\u000b");
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100 }
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101
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102 private void parseProtocol() throws ParseException {
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103 int start = parser.currentIndex();
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104 if( !(
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105 parser.match("HTTP/")
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106 && parser.inCharRange('0','9')
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107 && parser.match('.')
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108 && parser.inCharRange('0','9')
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109 ) )
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110 throw new ParseException(parser,"bad protocol");
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111 request.protocol = parser.textFrom(start);
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112 request.scheme = "http";
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113 }
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114
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115
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116 private void parserHeaderField() throws ParseException {
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117 String name = parseName();
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118 require( parser.match(':') );
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119 while( parser.anyOf(" \t") );
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120 String value = parseValue();
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121 while( parser.anyOf(" \t") );
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122 require( parser.match("\r\n") );
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123 Util.add(request.headers,name,value);
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124 }
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125
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126 private String parseName() throws ParseException {
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127 int start = parser.currentIndex();
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128 require( tokenChar() );
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129 while( tokenChar() );
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130 return parser.textFrom(start);
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131 }
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132
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133 private String parseValue() throws ParseException {
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134 int start = parser.currentIndex();
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135 while( !testEndOfValue() )
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136 require( parser.anyChar() );
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137 return parser.textFrom(start);
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138 }
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139
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140 private boolean testEndOfValue() {
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141 parser.begin();
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142 while( parser.anyOf(" \t") );
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143 boolean b = parser.endOfInput() || parser.anyOf("\r\n");
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144 parser.failure(); // rollback
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145 return b;
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146 }
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147
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148 private void require(boolean b) throws ParseException {
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149 if( !b )
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150 throw new ParseException(parser,"failed");
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151 }
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152
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153 boolean tokenChar() {
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154 if( parser.endOfInput() )
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155 return false;
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156 char c = parser.currentChar();
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157 if( 32 <= c && c <= 126 && "()<>@,;:\\\"/[]?={} \t\r\n".indexOf(c) == -1 ) {
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158 parser.anyChar();
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159 return true;
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160 } else {
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161 return false;
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162 }
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163 }
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164
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165
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166 private void parseCookies() throws ParseException {
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167 String text = (String)request.headers.get("cookie");
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168 if( text == null )
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169 return;
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170 this.parser = new Parser(text);
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171 while(true) {
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172 int start = parser.currentIndex();
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173 while( parser.noneOf("=;") );
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174 String name = urlDecode( parser.textFrom(start) );
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175 if( parser.match('=') ) {
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176 start = parser.currentIndex();
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177 while( parser.noneOf(";") );
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178 String value = parser.textFrom(start);
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179 int len = value.length();
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180 if( value.charAt(0)=='"' && value.charAt(len-1)=='"' )
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181 value = value.substring(1,len-1);
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182 value = urlDecode(value);
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183 request.cookies.put(name,value);
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184 }
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185 if( parser.endOfInput() )
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186 return;
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187 require( parser.match(';') );
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188 parser.match(' '); // optional for bad browsers
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189 }
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190 }
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191
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192
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193 private static final String contentTypeStart = "multipart/form-data; boundary=";
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194
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195 void parseMultipart() throws ParseException, UnsupportedEncodingException {
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196 if( request.body == null ) {
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197 logger.warn("body is null\n"+request.rawHead);
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198 return;
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199 }
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200 String contentType = (String)request.headers.get("content-type");
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201 if( !contentType.startsWith(contentTypeStart) )
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202 throw new RuntimeException(contentType);
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203 String boundary = "--"+contentType.substring(contentTypeStart.length());
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204 this.parser = new Parser(Util.toString(request.body,null));
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205 //System.out.println(this.parser.text);
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206 require( parser.match(boundary) );
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207 boundary = "\r\n" + boundary;
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208 while( !parser.match("--\r\n") ) {
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209 require( parser.match("\r\n") );
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210 require( parser.match("Content-Disposition: form-data; name=") );
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211 String name = quotedString();
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212 String filename = null;
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213 boolean isBinary = false;
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214 if( parser.match("; filename=") ) {
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215 filename = quotedString();
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216 require( parser.match("\r\n") );
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217 require( parser.match("Content-Type: ") );
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218 int start = parser.currentIndex();
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219 if( parser.match("application/") ) {
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220 isBinary = true;
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221 } else if( parser.match("image/") ) {
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222 isBinary = true;
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223 } else if( parser.match("text/") ) {
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224 isBinary = false;
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225 } else
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226 throw new ParseException(parser,"bad file content-type");
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227 while( parser.inCharRange('a','z') || parser.anyOf("-.") );
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228 contentType = parser.textFrom(start);
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229 }
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230 require( parser.match("\r\n") );
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231 require( parser.match("\r\n") );
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232 int start = parser.currentIndex();
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233 while( !parser.test(boundary) ) {
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234 require( parser.anyChar() );
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235 }
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236 String value = parser.textFrom(start);
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237 if( filename == null ) {
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238 Util.add(request.parameters,name,value);
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239 } else {
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240 Object content = isBinary ? Util.toBytes(value) : value;
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241 Request.MultipartFile mf = new Request.MultipartFile(filename,contentType,content);
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242 Util.add(request.parameters,name,mf);
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243 }
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244 require( parser.match(boundary) );
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245 }
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246 }
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247
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248 private String quotedString() throws ParseException {
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249 StringBuilder sb = new StringBuilder();
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250 require( parser.match('"') );
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251 while( !parser.match('"') ) {
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252 if( parser.match("\\\"") ) {
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253 sb.append('"');
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254 } else {
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255 require( parser.anyChar() );
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256 sb.append( parser.lastChar() );
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257 }
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258 }
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259 return sb.toString();
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260 }
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261
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262 private String urlDecode(String s) throws ParseException {
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263 try {
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264 return URLDecoder.decode(s,"UTF-8");
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265 } catch(UnsupportedEncodingException e) {
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266 parser.rollback();
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267 throw new ParseException(parser,e);
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268 } catch(IllegalArgumentException e) {
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269 parser.rollback();
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270 throw new ParseException(parser,e);
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271 }
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272 }
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273
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274 // improve later
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275 void parseJson(String charset) throws UnsupportedEncodingException {
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276 if( request.body == null ) {
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277 logger.warn("body is null\n"+request.rawHead);
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278 return;
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279 }
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280 String value = Util.toString(request.body,charset);
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281 Util.add(request.parameters,"json",value);
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282 }
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283
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284 }