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annotate src/luan/modules/url/LuanUrl.java @ 1420:225808b90cee

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options handling
author Franklin Schmidt <fschmidt@gmail.com>
date Sat, 26 Oct 2019 22:21:09 -0600
parents 27efb1fcbcb5
children 8ab2f0fc3829
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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 goodjava.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 public final 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 static final byte[] NO_CONTENT = new byte[0];
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37 private byte[] content = NO_CONTENT;
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38 private MultipartClient multipart = null;
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39 private int timeout = 0;
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40 private String authUsername = null;
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41 private String authPassword = null;
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42 public HttpURLConnection httpCon;
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43
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44 public LuanUrl(URL url,LuanTable options) throws LuanException {
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45 if( options != null ) {
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46 options = new LuanTable(options);
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47 String methodStr = Utils.removeString(options,"method");
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48 if( methodStr != null ) {
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49 methodStr = methodStr.toUpperCase();
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50 try {
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51 this.method = Method.valueOf(methodStr);
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52 } catch(IllegalArgumentException e) {
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53 throw new LuanException( "invalid method: "+methodStr );
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54 }
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55 }
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56 Map headerMap = removeMap(options,"headers");
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57 if( headerMap != null ) {
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58 for( Object hack : headerMap.entrySet() ) {
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59 Map.Entry entry = (Map.Entry)hack;
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60 String name = (String)entry.getKey();
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61 Object val = entry.getValue();
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62 if( val instanceof String ) {
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63 headers.put(name,val);
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64 } else {
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65 if( !(val instanceof LuanTable) )
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66 throw new LuanException( "header '"+name+"' must be string or table" );
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67 LuanTable t = (LuanTable)val;
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68 if( !t.isList() )
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69 throw new LuanException( "header '"+name+"' table must be list" );
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70 headers.put(name,t.asList());
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71 }
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72 }
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73 }
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74 LuanTable auth = Utils.removeTable(options,"authorization");
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75 if( auth != null ) {
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76 if( headers!=null && headers.containsKey("authorization") )
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77 throw new LuanException( "can't define authorization with header 'authorization' defined" );
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78 String username = Utils.removeString(auth,"username");
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79 if( username==null ) username = "";
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80 String password = Utils.removeString(auth,"password");
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81 if( password==null ) password = "";
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82 String type = Utils.removeString(auth,"type");
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83 if( !auth.isEmpty() )
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84 throw new LuanException( "unrecognized authorization options: "+auth );
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85 if( type != null ) {
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86 if( !type.toLowerCase().equals("basic") )
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87 throw new LuanException( "authorization type can only be 'basic' or nil" );
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88 String val = basicAuth(username,password);
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89 headers.put("authorization",val);
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90 } else {
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91 authUsername = username;
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92 authPassword = password;
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93 }
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94 }
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95 Map params = removeMap(options,"parameters");
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96 String enctype = Utils.removeString(options,"enctype");
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97 Object content = options.remove("content");
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98 if( content != null ) {
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99 if( this.method != Method.POST )
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100 throw new LuanException( "content can only be used with POST" );
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101 if( params != null )
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102 throw new LuanException( "content cannot be used with parameters" );
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103 if( content instanceof String ) {
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104 this.content = ((String)content).getBytes();
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105 } else if( content instanceof byte[] ) {
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106 this.content = (byte[])content;
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107 } else
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108 throw new LuanException( "content must be String or byte[]" );
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109 }
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110 if( enctype != null ) {
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111 if( !enctype.equals("multipart/form-data") )
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112 throw new LuanException( "unrecognized enctype: "+enctype );
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113 if( this.method != Method.POST )
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114 throw new LuanException( "multipart/form-data can only be used with POST" );
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115 if( params==null )
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116 throw new LuanException( "multipart/form-data requires parameters" );
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117 if( params.isEmpty() )
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118 throw new LuanException( "multipart/form-data parameters can't be empty" );
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119 multipart = new MultipartClient(params);
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120 }
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121 else if( params != null ) {
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122 StringBuilder sb = new StringBuilder();
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123 for( Object hack : params.entrySet() ) {
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124 Map.Entry entry = (Map.Entry)hack;
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125 String key = (String)entry.getKey();
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126 Object val = entry.getValue();
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127 String keyEnc = encode(key);
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128 if( val instanceof String ) {
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129 and(sb);
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130 sb.append( keyEnc ).append( '=' ).append( encode((String)val) );
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131 } else {
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132 if( !(val instanceof LuanTable) )
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133 throw new LuanException( "parameter '"+key+"' must be string or table" );
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134 LuanTable t = (LuanTable)val;
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135 if( !t.isList() )
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136 throw new LuanException( "parameter '"+key+"' table must be list" );
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137 for( Object obj : t.asList() ) {
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138 if( !(obj instanceof String) )
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139 throw new LuanException( "parameter '"+key+"' values must be strings" );
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140 and(sb);
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141 sb.append( keyEnc ).append( '=' ).append( encode((String)obj) );
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142 }
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143 }
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144 }
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145 if( this.method==Method.POST ) {
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146 this.content = sb.toString().getBytes();
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147 } else {
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148 String urlS = url.toString();
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149 if( urlS.indexOf('?') == -1 ) {
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150 urlS += '?';
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151 } else {
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152 urlS += '&';
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153 }
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154 urlS += sb;
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155 try {
1354
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156 url = new URL(urlS);
726
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157 } catch(IOException e) {
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158 throw new RuntimeException(e);
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159 }
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160 }
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161 }
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162 Integer timeout = Utils.removeInteger(options,"time_out");
733
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163 if( timeout != null )
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164 this.timeout = timeout;
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165 Utils.checkEmpty(options);
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166 }
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167 this.url = url;
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168 }
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169
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170 private static void and(StringBuilder sb) {
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171 if( sb.length() > 0 )
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172 sb.append('&');
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173 }
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174
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175 private static String encode(String s) {
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176 try {
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177 return URLEncoder.encode(s,"UTF-8");
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178 } catch(UnsupportedEncodingException e) {
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179 throw new RuntimeException(e);
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180 }
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181 }
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182
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183 private static Map removeMap(LuanTable options,String key) throws LuanException {
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184 LuanTable t = Utils.removeTable(options,key);
1267
9fa8b8389578 add LuanTable.luan;
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185 return t==null ? null : t.asMap();
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186 }
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187
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188 @Override public InputStream inputStream() throws IOException, LuanException {
1317
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189 try {
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190 return inputStream(null);
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191 } catch(AuthException e) {
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192 try {
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193 return inputStream(e.authorization);
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194 } catch(AuthException e2) {
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195 throw new RuntimeException(e2); // never
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196 }
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197 }
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198 }
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199
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200 private InputStream inputStream(String authorization)
1317
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201 throws IOException, LuanException, AuthException
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202 {
722
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203 URLConnection con = url.openConnection();
733
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204 if( timeout != 0 ) {
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205 con.setConnectTimeout(timeout);
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206 con.setReadTimeout(timeout);
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207 }
1317
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diff changeset
208 for( Map.Entry<String,Object> entry : headers.entrySet() ) {
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209 String key = entry.getKey();
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210 Object val = entry.getValue();
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211 if( val instanceof String ) {
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diff changeset
212 con.addRequestProperty(key,(String)val);
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213 } else {
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214 List list = (List)val;
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215 for( Object obj : list ) {
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diff changeset
216 con.addRequestProperty(key,(String)obj);
722
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217 }
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218 }
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219 }
1317
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220 if( authorization != null )
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diff changeset
221 con.addRequestProperty("Authorization",authorization);
1087
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222 if( !(con instanceof HttpURLConnection) ) {
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223 if( method!=Method.GET )
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224 throw new LuanException("method must be GET but is "+method);
722
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225 return con.getInputStream();
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226 }
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227
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45363886f256 add url methods
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228 httpCon = (HttpURLConnection)con;
722
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229
1087
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diff changeset
230 if( method==Method.GET ) {
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231 return getInputStream(httpCon,authorization);
1087
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232 }
4aab4dd3ac9c improve url error handling
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diff changeset
233
722
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234 if( method==Method.DELETE ) {
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235 httpCon.setRequestMethod("DELETE");
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236 return getInputStream(httpCon,authorization);
722
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237 }
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238
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239 // POST
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240
1165
668f29bc52ea clean up content-type
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241 // httpCon.setRequestProperty("content-type","application/x-www-form-urlencoded");
722
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parents:
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242 httpCon.setDoOutput(true);
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243 httpCon.setRequestMethod("POST");
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244
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diff changeset
245 OutputStream out;
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diff changeset
246 if( multipart != null ) {
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diff changeset
247 out = multipart.write(httpCon);
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diff changeset
248 } else {
1363
1a7b8e38921a add url post content
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diff changeset
249 // httpCon.setRequestProperty("Content-Length",Integer.toString(content.length));
725
a741a3a33423 add url support for multipart/form-data
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diff changeset
250 out = httpCon.getOutputStream();
1363
1a7b8e38921a add url post content
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diff changeset
251 out.write(content);
725
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diff changeset
252 }
726
14f136a4641f use enctype for multipart/form-data
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diff changeset
253 out.flush();
722
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parents:
diff changeset
254 try {
1335
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diff changeset
255 return getInputStream(httpCon,authorization);
722
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parents:
diff changeset
256 } finally {
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257 out.close();
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parents:
diff changeset
258 }
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parents:
diff changeset
259 }
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260
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diff changeset
261 private InputStream getInputStream(HttpURLConnection httpCon,String authorization)
1317
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262 throws IOException, LuanException, AuthException
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diff changeset
263 {
1085
a04da9a3e9eb improve url delete error handling
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diff changeset
264 try {
a04da9a3e9eb improve url delete error handling
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diff changeset
265 return httpCon.getInputStream();
1349
0cceff521abb IO error handling
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diff changeset
266 // } catch(FileNotFoundException e) {
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diff changeset
267 // throw e;
1085
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diff changeset
268 } catch(IOException e) {
1094
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parents: 1087
diff changeset
269 int responseCode = httpCon.getResponseCode();
1318
35a6a195819f in authorization rename user to username
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diff changeset
270 if( responseCode == 401 && authUsername != null && authorization==null ) {
1317
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diff changeset
271 String authStr = httpCon.getHeaderField("www-authenticate");
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diff changeset
272 //System.out.println("auth = "+authStr);
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diff changeset
273 try {
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diff changeset
274 WwwAuthenticate auth = new WwwAuthenticate(authStr);
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diff changeset
275 if( auth.type.equals("Basic") ) {
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diff changeset
276 String val = basicAuth(authUsername,authPassword);
1317
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277 throw new AuthException(val);
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diff changeset
278 } else if( auth.type.equals("Digest") ) {
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diff changeset
279 String realm = auth.options.get("realm");
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diff changeset
280 if(realm==null) throw new RuntimeException("missing realm");
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diff changeset
281 String algorithm = auth.options.get("algorithm");
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diff changeset
282 if( algorithm!=null && !algorithm.equals("MD5") )
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diff changeset
283 throw new LuanException("unsupported digest algorithm: "+algorithm);
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diff changeset
284 String qop = auth.options.get("qop");
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diff changeset
285 if( qop!=null && !qop.equals("auth") )
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diff changeset
286 throw new LuanException("unsupported digest qop: "+qop);
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diff changeset
287 String nonce = auth.options.get("nonce");
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diff changeset
288 if(nonce==null) throw new RuntimeException("missing nonce");
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diff changeset
289 String uri = fullPath(url);
1318
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diff changeset
290 String a1 = authUsername + ':' + realm + ':' + authPassword;
1317
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diff changeset
291 String a2 = "" + method + ':' + uri;
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diff changeset
292 String nc = "00000001";
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diff changeset
293 String cnonce = "7761faf2daa45b3b"; // who cares?
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diff changeset
294 String response = md5(a1) + ':' + nonce;
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diff changeset
295 if( qop != null ) {
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diff changeset
296 response += ':' + nc + ':' + cnonce + ':' + qop;
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diff changeset
297 }
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diff changeset
298 response += ':' + md5(a2);
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diff changeset
299 response = md5(response);
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diff changeset
300 String val = "Digest";
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diff changeset
301 val += " username=\"" + authUsername + "\"";
1317
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diff changeset
302 val += ", realm=\"" + realm + "\"";
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diff changeset
303 val += ", uri=\"" + uri + "\"";
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diff changeset
304 val += ", nonce=\"" + nonce + "\"";
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diff changeset
305 val += ", response=\"" + response + "\"";
c286c1e36b81 add client digest authentication
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diff changeset
306 if( qop != null ) {
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diff changeset
307 val += ", qop=" + qop;
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diff changeset
308 val += ", nc=" + nc;
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diff changeset
309 val += ", cnonce=\"" + cnonce + "\"";
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diff changeset
310 }
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diff changeset
311 //System.out.println("val = "+val);
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diff changeset
312 throw new AuthException(val);
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diff changeset
313 } else
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diff changeset
314 throw new RuntimeException(auth.type);
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diff changeset
315 } catch(ParseException pe) {
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diff changeset
316 throw new LuanException(pe);
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diff changeset
317 }
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diff changeset
318 }
1094
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319 String responseMessage = httpCon.getResponseMessage();
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320 InputStream is = httpCon.getErrorStream();
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321 if( is == null )
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322 throw e;
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323 Reader in = new InputStreamReader(is);
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324 String msg = Utils.readAll(in);
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325 in.close();
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326 LuanException le = new LuanException(msg,e);
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327 le.put("response_code",responseCode);
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328 le.put("response_message",responseMessage);
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329 throw le;
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330 }
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331 }
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332
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333 @Override public String to_string() {
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334 return url.toString();
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335 }
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336
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337 @Override public String to_uri_string() {
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338 return url.toString();
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339 }
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340
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341 private static String basicAuth(String username,String password) {
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342 String s = username + ':' + password;
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343 return "Basic " + Base64.getEncoder().encodeToString(s.getBytes());
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344 }
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345
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346 private final class AuthException extends Exception {
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347 final String authorization;
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348
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349 AuthException(String authorization) {
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350 this.authorization = authorization;
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351 }
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352 }
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353
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354 // retarded java api lacks this
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355 public static String fullPath(URL url) {
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356 String path = url.getPath();
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357 String query = url.getQuery();
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358 if( query != null )
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359 path += "?" + query;
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360 return path;
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361 }
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362
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363 // retarded java api lacks this
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364 public static String md5(String s) {
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365 try {
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366 byte[] md5 = MessageDigest.getInstance("MD5").digest(s.getBytes());
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367 StringBuffer sb = new StringBuffer();
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368 for( byte b : md5 ) {
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369 sb.append( String.format("%02x",b) );
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370 }
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371 return sb.toString();
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372 } catch(NoSuchAlgorithmException e) {
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373 throw new RuntimeException(e);
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374 }
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375 }
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376
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377 }