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annotate src/luan/modules/url/LuanUrl.java @ 1335:e0cf0d108a77

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major cleanup
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 14 Feb 2019 03:10:45 -0700
parents 25746915a241
children 0cceff521abb
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rev   line source
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1 package luan.modules.url;
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2
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3 import java.io.InputStream;
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4 import java.io.InputStreamReader;
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5 import java.io.OutputStream;
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6 import java.io.Reader;
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7 import java.io.IOException;
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8 import java.io.FileNotFoundException;
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9 import java.io.UnsupportedEncodingException;
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10 import java.net.URL;
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11 import java.net.URLConnection;
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12 import java.net.HttpURLConnection;
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13 import java.net.URLEncoder;
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14 import java.security.MessageDigest;
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15 import java.security.NoSuchAlgorithmException;
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16 import java.util.Map;
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17 import java.util.HashMap;
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18 import java.util.List;
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19 import java.util.Base64;
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20 import luan.lib.parser.ParseException;
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21 import luan.Luan;
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22 import luan.LuanTable;
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23 import luan.LuanJavaFunction;
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24 import luan.LuanException;
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25 import luan.modules.IoLuan;
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26 import luan.modules.Utils;
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27
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28
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29 public final class LuanUrl extends IoLuan.LuanIn {
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30
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31 private static enum Method { GET, POST, DELETE }
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32
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33 private URL url;
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34 private Method method = Method.GET;
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35 private final Map<String,Object> headers = new HashMap<String,Object>();
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36 private String content = "";
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37 private MultipartClient multipart = null;
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38 private int timeout = 0;
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39 private String authUsername = null;
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40 private String authPassword = null;
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41
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42 public LuanUrl(URL url,LuanTable options) throws LuanException {
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43 this.url = url;
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44 if( options != null ) {
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45 Map map = options.asMap();
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46 String methodStr = getString(map,"method");
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47 if( methodStr != null ) {
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48 methodStr = methodStr.toUpperCase();
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49 try {
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50 this.method = Method.valueOf(methodStr);
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51 } catch(IllegalArgumentException e) {
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52 throw new LuanException( "invalid method: "+methodStr );
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53 }
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54 }
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55 Map headerMap = getMap(map,"headers");
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56 if( headerMap != null ) {
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57 for( Object hack : headerMap.entrySet() ) {
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58 Map.Entry entry = (Map.Entry)hack;
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59 String name = (String)entry.getKey();
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60 Object val = entry.getValue();
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61 if( val instanceof String ) {
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62 headers.put(name,val);
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63 } else {
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64 if( !(val instanceof LuanTable) )
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65 throw new LuanException( "header '"+name+"' must be string or table" );
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66 LuanTable t = (LuanTable)val;
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67 if( !t.isList() )
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68 throw new LuanException( "header '"+name+"' table must be list" );
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69 headers.put(name,t.asList());
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70 }
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71 }
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72 }
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73 Map auth = getMap(map,"authorization");
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74 if( auth != null ) {
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75 if( headers!=null && headers.containsKey("authorization") )
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76 throw new LuanException( "can't define authorization with header 'authorization' defined" );
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77 String username = getString(auth,"username");
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78 if( username==null ) username = "";
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79 String password = getString(auth,"password");
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80 if( password==null ) password = "";
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81 String type = getString(auth,"type");
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82 if( !auth.isEmpty() )
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83 throw new LuanException( "unrecognized authorization options: "+auth );
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84 if( type != null ) {
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85 if( !type.toLowerCase().equals("basic") )
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86 throw new LuanException( "authorization type can only be 'basic' or nil" );
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87 String val = basicAuth(username,password);
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88 headers.put("authorization",val);
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89 } else {
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90 authUsername = username;
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91 authPassword = password;
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92 }
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93 }
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94 Map params = getMap(map,"parameters");
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95 String enctype = getString(map,"enctype");
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96 if( enctype != null ) {
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97 if( !enctype.equals("multipart/form-data") )
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98 throw new LuanException( "unrecognized enctype: "+enctype );
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99 if( this.method!=Method.POST )
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100 throw new LuanException( "multipart/form-data can only be used with POST" );
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101 if( params==null )
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102 throw new LuanException( "multipart/form-data requires parameters" );
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103 if( params.isEmpty() )
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104 throw new LuanException( "multipart/form-data parameters can't be empty" );
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105 multipart = new MultipartClient(params);
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106 }
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107 else if( params != null ) {
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108 StringBuilder sb = new StringBuilder();
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109 for( Object hack : params.entrySet() ) {
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110 Map.Entry entry = (Map.Entry)hack;
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111 String key = (String)entry.getKey();
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112 Object val = entry.getValue();
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113 String keyEnc = encode(key);
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114 if( val instanceof String ) {
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115 and(sb);
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116 sb.append( keyEnc ).append( '=' ).append( encode((String)val) );
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117 } else {
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118 if( !(val instanceof LuanTable) )
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119 throw new LuanException( "parameter '"+key+"' must be string or table" );
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120 LuanTable t = (LuanTable)val;
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121 if( !t.isList() )
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122 throw new LuanException( "parameter '"+key+"' table must be list" );
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123 for( Object obj : t.asList() ) {
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124 if( !(obj instanceof String) )
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125 throw new LuanException( "parameter '"+key+"' values must be strings" );
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126 and(sb);
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127 sb.append( keyEnc ).append( '=' ).append( encode((String)obj) );
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128 }
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129 }
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130 }
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131 if( this.method==Method.POST ) {
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132 content = sb.toString();
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133 } else {
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134 String urlS = this.url.toString();
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135 if( urlS.indexOf('?') == -1 ) {
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136 urlS += '?';
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137 } else {
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138 urlS += '&';
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139 }
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140 urlS += sb;
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141 try {
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142 this.url = new URL(urlS);
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143 } catch(IOException e) {
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144 throw new RuntimeException(e);
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145 }
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146 }
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147 }
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148 Integer timeout = getInt(map,"time_out");
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149 if( timeout != null )
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150 this.timeout = timeout;
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151 if( !map.isEmpty() )
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152 throw new LuanException( "unrecognized options: "+map );
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153 }
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154 }
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155
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156 private static void and(StringBuilder sb) {
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157 if( sb.length() > 0 )
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158 sb.append('&');
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159 }
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160
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161 private static String encode(String s) {
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162 try {
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163 return URLEncoder.encode(s,"UTF-8");
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164 } catch(UnsupportedEncodingException e) {
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165 throw new RuntimeException(e);
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166 }
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167 }
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168
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169 private static String getString(Map map,String key) throws LuanException {
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170 Object val = map.remove(key);
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171 if( val!=null && !(val instanceof String) )
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172 throw new LuanException( "parameter '"+key+"' must be a string" );
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173 return (String)val;
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174 }
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175
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176 private static Integer getInt(Map map,String key) throws LuanException {
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177 Object val = map.remove(key);
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178 if( val==null )
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179 return null;
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180 Integer i = Luan.asInteger(val);
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181 if( i==null )
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182 throw new LuanException( "parameter '"+key+"' must be an integer" );
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183 return i;
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184 }
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185
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186 private static LuanTable getTable(Map map,String key) throws LuanException {
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187 Object val = map.remove(key);
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188 if( val!=null && !(val instanceof LuanTable) )
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189 throw new LuanException( "parameter '"+key+"' must be a table" );
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190 return (LuanTable)val;
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191 }
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192
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193 private static Map getMap(Map map,String key) throws LuanException {
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194 LuanTable t = getTable(map,key);
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195 return t==null ? null : t.asMap();
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196 }
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197
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198 @Override public InputStream inputStream() throws IOException, LuanException {
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199 try {
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200 return inputStream(null);
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201 } catch(AuthException e) {
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202 try {
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203 return inputStream(e.authorization);
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204 } catch(AuthException e2) {
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205 throw new RuntimeException(e2); // never
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206 }
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207 }
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208 }
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209
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210 private InputStream inputStream(String authorization)
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211 throws IOException, LuanException, AuthException
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212 {
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213 URLConnection con = url.openConnection();
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214 if( timeout != 0 ) {
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215 con.setConnectTimeout(timeout);
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216 con.setReadTimeout(timeout);
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217 }
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218 for( Map.Entry<String,Object> entry : headers.entrySet() ) {
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219 String key = entry.getKey();
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220 Object val = entry.getValue();
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221 if( val instanceof String ) {
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222 con.addRequestProperty(key,(String)val);
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223 } else {
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224 List list = (List)val;
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225 for( Object obj : list ) {
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226 con.addRequestProperty(key,(String)obj);
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227 }
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228 }
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229 }
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230 if( authorization != null )
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231 con.addRequestProperty("Authorization",authorization);
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232 if( !(con instanceof HttpURLConnection) ) {
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233 if( method!=Method.GET )
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234 throw new LuanException("method must be GET but is "+method);
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235 return con.getInputStream();
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236 }
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237
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238 HttpURLConnection httpCon = (HttpURLConnection)con;
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239
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240 if( method==Method.GET ) {
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241 return getInputStream(httpCon,authorization);
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242 }
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243
722
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244 if( method==Method.DELETE ) {
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245 httpCon.setRequestMethod("DELETE");
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246 return getInputStream(httpCon,authorization);
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247 }
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248
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249 // POST
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250
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668f29bc52ea clean up content-type
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251 // httpCon.setRequestProperty("content-type","application/x-www-form-urlencoded");
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252 httpCon.setDoOutput(true);
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253 httpCon.setRequestMethod("POST");
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254
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255 OutputStream out;
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256 if( multipart != null ) {
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257 out = multipart.write(httpCon);
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258 } else {
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259 byte[] post = content.getBytes();
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260 // httpCon.setRequestProperty("Content-Length",Integer.toString(post.length));
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261 out = httpCon.getOutputStream();
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262 out.write(post);
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263 }
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264 out.flush();
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265 try {
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266 return getInputStream(httpCon,authorization);
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267 } finally {
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268 out.close();
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269 }
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270 }
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271
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272 private InputStream getInputStream(HttpURLConnection httpCon,String authorization)
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273 throws IOException, LuanException, AuthException
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274 {
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275 try {
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276 return httpCon.getInputStream();
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277 } catch(FileNotFoundException e) {
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278 throw e;
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279 } catch(IOException e) {
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280 int responseCode = httpCon.getResponseCode();
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281 if( responseCode == 401 && authUsername != null && authorization==null ) {
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282 String authStr = httpCon.getHeaderField("www-authenticate");
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diff changeset
283 //System.out.println("auth = "+authStr);
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284 try {
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diff changeset
285 WwwAuthenticate auth = new WwwAuthenticate(authStr);
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286 if( auth.type.equals("Basic") ) {
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287 String val = basicAuth(authUsername,authPassword);
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288 throw new AuthException(val);
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289 } else if( auth.type.equals("Digest") ) {
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diff changeset
290 String realm = auth.options.get("realm");
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291 if(realm==null) throw new RuntimeException("missing realm");
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292 String algorithm = auth.options.get("algorithm");
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293 if( algorithm!=null && !algorithm.equals("MD5") )
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diff changeset
294 throw new LuanException("unsupported digest algorithm: "+algorithm);
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diff changeset
295 String qop = auth.options.get("qop");
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diff changeset
296 if( qop!=null && !qop.equals("auth") )
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diff changeset
297 throw new LuanException("unsupported digest qop: "+qop);
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diff changeset
298 String nonce = auth.options.get("nonce");
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diff changeset
299 if(nonce==null) throw new RuntimeException("missing nonce");
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diff changeset
300 String uri = fullPath(url);
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diff changeset
301 String a1 = authUsername + ':' + realm + ':' + authPassword;
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diff changeset
302 String a2 = "" + method + ':' + uri;
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diff changeset
303 String nc = "00000001";
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diff changeset
304 String cnonce = "7761faf2daa45b3b"; // who cares?
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diff changeset
305 String response = md5(a1) + ':' + nonce;
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diff changeset
306 if( qop != null ) {
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diff changeset
307 response += ':' + nc + ':' + cnonce + ':' + qop;
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diff changeset
308 }
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diff changeset
309 response += ':' + md5(a2);
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diff changeset
310 response = md5(response);
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diff changeset
311 String val = "Digest";
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diff changeset
312 val += " username=\"" + authUsername + "\"";
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313 val += ", realm=\"" + realm + "\"";
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diff changeset
314 val += ", uri=\"" + uri + "\"";
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diff changeset
315 val += ", nonce=\"" + nonce + "\"";
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diff changeset
316 val += ", response=\"" + response + "\"";
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diff changeset
317 if( qop != null ) {
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diff changeset
318 val += ", qop=" + qop;
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diff changeset
319 val += ", nc=" + nc;
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320 val += ", cnonce=\"" + cnonce + "\"";
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321 }
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322 //System.out.println("val = "+val);
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323 throw new AuthException(val);
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324 } else
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325 throw new RuntimeException(auth.type);
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326 } catch(ParseException pe) {
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327 throw new LuanException(pe);
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328 }
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329 }
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330 String responseMessage = httpCon.getResponseMessage();
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331 InputStream is = httpCon.getErrorStream();
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332 if( is == null )
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333 throw e;
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334 Reader in = new InputStreamReader(is);
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335 String msg = Utils.readAll(in);
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336 in.close();
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337 LuanException le = new LuanException(msg,e);
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338 le.put("response_code",responseCode);
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339 le.put("response_message",responseMessage);
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340 throw le;
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341 }
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342 }
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343
722
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344 @Override public String to_string() {
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345 return url.toString();
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346 }
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347
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348 @Override public String to_uri_string() {
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349 return url.toString();
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350 }
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351
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352 private static String basicAuth(String username,String password) {
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353 String s = username + ':' + password;
1317
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354 return "Basic " + Base64.getEncoder().encodeToString(s.getBytes());
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355 }
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356
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357 private final class AuthException extends Exception {
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358 final String authorization;
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359
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360 AuthException(String authorization) {
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361 this.authorization = authorization;
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362 }
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363 }
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364
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365 // retarded java api lacks this
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366 public static String fullPath(URL url) {
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367 String path = url.getPath();
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368 String query = url.getQuery();
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369 if( query != null )
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370 path += "?" + query;
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371 return path;
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372 }
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373
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374 // retarded java api lacks this
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375 public static String md5(String s) {
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376 try {
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377 byte[] md5 = MessageDigest.getInstance("MD5").digest(s.getBytes());
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378 StringBuffer sb = new StringBuffer();
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379 for( byte b : md5 ) {
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380 sb.append( String.format("%02x",b) );
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381 }
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382 return sb.toString();
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383 } catch(NoSuchAlgorithmException e) {
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384 throw new RuntimeException(e);
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385 }
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386 }
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387
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388 }