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annotate src/luan/modules/url/LuanUrl.java @ 1364:45363886f256

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add url methods
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 29 May 2019 19:03:25 -0600
parents 1a7b8e38921a
children eb8b35dccd99
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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 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 Map map = options.asMap();
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47 String methodStr = getString(map,"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 = getMap(map,"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 Map auth = getMap(map,"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 = getString(auth,"username");
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79 if( username==null ) username = "";
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80 String password = getString(auth,"password");
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81 if( password==null ) password = "";
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82 String type = getString(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 = getMap(map,"parameters");
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96 String enctype = getString(map,"enctype");
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97 Object content = map.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 = getInt(map,"time_out");
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163 if( timeout != null )
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164 this.timeout = timeout;
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165 if( !map.isEmpty() )
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166 throw new LuanException( "unrecognized options: "+map );
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167 }
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168 this.url = url;
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169 }
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170
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diff changeset
171 private static void and(StringBuilder sb) {
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172 if( sb.length() > 0 )
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173 sb.append('&');
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174 }
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175
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176 private static String encode(String s) {
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177 try {
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178 return URLEncoder.encode(s,"UTF-8");
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179 } catch(UnsupportedEncodingException e) {
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180 throw new RuntimeException(e);
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181 }
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182 }
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183
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184 private static String getString(Map map,String key) throws LuanException {
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185 Object val = map.remove(key);
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186 if( val!=null && !(val instanceof String) )
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187 throw new LuanException( "parameter '"+key+"' must be a string" );
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188 return (String)val;
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189 }
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190
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191 private static Integer getInt(Map map,String key) throws LuanException {
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192 Object val = map.remove(key);
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193 if( val==null )
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194 return null;
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195 Integer i = Luan.asInteger(val);
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196 if( i==null )
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197 throw new LuanException( "parameter '"+key+"' must be an integer" );
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198 return i;
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diff changeset
199 }
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200
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201 private static LuanTable getTable(Map map,String key) throws LuanException {
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202 Object val = map.remove(key);
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203 if( val!=null && !(val instanceof LuanTable) )
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204 throw new LuanException( "parameter '"+key+"' must be a table" );
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205 return (LuanTable)val;
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206 }
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207
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9fa8b8389578 add LuanTable.luan;
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208 private static Map getMap(Map map,String key) throws LuanException {
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209 LuanTable t = getTable(map,key);
1267
9fa8b8389578 add LuanTable.luan;
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210 return t==null ? null : t.asMap();
722
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211 }
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212
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diff changeset
213 @Override public InputStream inputStream() throws IOException, LuanException {
1317
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214 try {
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215 return inputStream(null);
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216 } catch(AuthException e) {
c286c1e36b81 add client digest authentication
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217 try {
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diff changeset
218 return inputStream(e.authorization);
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219 } catch(AuthException e2) {
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220 throw new RuntimeException(e2); // never
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221 }
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222 }
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diff changeset
223 }
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224
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diff changeset
225 private InputStream inputStream(String authorization)
1317
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226 throws IOException, LuanException, AuthException
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227 {
722
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228 URLConnection con = url.openConnection();
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229 if( timeout != 0 ) {
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diff changeset
230 con.setConnectTimeout(timeout);
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231 con.setReadTimeout(timeout);
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232 }
1317
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diff changeset
233 for( Map.Entry<String,Object> entry : headers.entrySet() ) {
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234 String key = entry.getKey();
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235 Object val = entry.getValue();
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236 if( val instanceof String ) {
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diff changeset
237 con.addRequestProperty(key,(String)val);
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238 } else {
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239 List list = (List)val;
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240 for( Object obj : list ) {
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diff changeset
241 con.addRequestProperty(key,(String)obj);
722
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242 }
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243 }
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244 }
1317
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245 if( authorization != null )
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diff changeset
246 con.addRequestProperty("Authorization",authorization);
1087
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diff changeset
247 if( !(con instanceof HttpURLConnection) ) {
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248 if( method!=Method.GET )
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249 throw new LuanException("method must be GET but is "+method);
722
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250 return con.getInputStream();
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diff changeset
251 }
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252
1364
45363886f256 add url methods
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253 httpCon = (HttpURLConnection)con;
722
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254
1087
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diff changeset
255 if( method==Method.GET ) {
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diff changeset
256 return getInputStream(httpCon,authorization);
1087
4aab4dd3ac9c improve url error handling
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diff changeset
257 }
4aab4dd3ac9c improve url error handling
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diff changeset
258
722
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diff changeset
259 if( method==Method.DELETE ) {
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260 httpCon.setRequestMethod("DELETE");
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diff changeset
261 return getInputStream(httpCon,authorization);
722
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diff changeset
262 }
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263
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264 // POST
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265
1165
668f29bc52ea clean up content-type
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diff changeset
266 // httpCon.setRequestProperty("content-type","application/x-www-form-urlencoded");
722
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267 httpCon.setDoOutput(true);
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268 httpCon.setRequestMethod("POST");
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269
725
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diff changeset
270 OutputStream out;
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diff changeset
271 if( multipart != null ) {
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diff changeset
272 out = multipart.write(httpCon);
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diff changeset
273 } else {
1363
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diff changeset
274 // httpCon.setRequestProperty("Content-Length",Integer.toString(content.length));
725
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diff changeset
275 out = httpCon.getOutputStream();
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diff changeset
276 out.write(content);
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diff changeset
277 }
726
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diff changeset
278 out.flush();
722
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parents:
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279 try {
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diff changeset
280 return getInputStream(httpCon,authorization);
722
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diff changeset
281 } finally {
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282 out.close();
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283 }
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284 }
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285
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diff changeset
286 private InputStream getInputStream(HttpURLConnection httpCon,String authorization)
1317
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diff changeset
287 throws IOException, LuanException, AuthException
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diff changeset
288 {
1085
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parents: 780
diff changeset
289 try {
a04da9a3e9eb improve url delete error handling
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diff changeset
290 return httpCon.getInputStream();
1349
0cceff521abb IO error handling
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parents: 1335
diff changeset
291 // } catch(FileNotFoundException e) {
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diff changeset
292 // throw e;
1085
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diff changeset
293 } catch(IOException e) {
1094
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parents: 1087
diff changeset
294 int responseCode = httpCon.getResponseCode();
1318
35a6a195819f in authorization rename user to username
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parents: 1317
diff changeset
295 if( responseCode == 401 && authUsername != null && authorization==null ) {
1317
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diff changeset
296 String authStr = httpCon.getHeaderField("www-authenticate");
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diff changeset
297 //System.out.println("auth = "+authStr);
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diff changeset
298 try {
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diff changeset
299 WwwAuthenticate auth = new WwwAuthenticate(authStr);
c286c1e36b81 add client digest authentication
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diff changeset
300 if( auth.type.equals("Basic") ) {
1318
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diff changeset
301 String val = basicAuth(authUsername,authPassword);
1317
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diff changeset
302 throw new AuthException(val);
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diff changeset
303 } else if( auth.type.equals("Digest") ) {
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diff changeset
304 String realm = auth.options.get("realm");
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diff changeset
305 if(realm==null) throw new RuntimeException("missing realm");
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diff changeset
306 String algorithm = auth.options.get("algorithm");
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diff changeset
307 if( algorithm!=null && !algorithm.equals("MD5") )
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diff changeset
308 throw new LuanException("unsupported digest algorithm: "+algorithm);
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diff changeset
309 String qop = auth.options.get("qop");
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parents: 1315
diff changeset
310 if( qop!=null && !qop.equals("auth") )
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diff changeset
311 throw new LuanException("unsupported digest qop: "+qop);
c286c1e36b81 add client digest authentication
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parents: 1315
diff changeset
312 String nonce = auth.options.get("nonce");
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diff changeset
313 if(nonce==null) throw new RuntimeException("missing nonce");
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parents: 1315
diff changeset
314 String uri = fullPath(url);
1318
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parents: 1317
diff changeset
315 String a1 = authUsername + ':' + realm + ':' + authPassword;
1317
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parents: 1315
diff changeset
316 String a2 = "" + method + ':' + uri;
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diff changeset
317 String nc = "00000001";
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diff changeset
318 String cnonce = "7761faf2daa45b3b"; // who cares?
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parents: 1315
diff changeset
319 String response = md5(a1) + ':' + nonce;
c286c1e36b81 add client digest authentication
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320 if( qop != null ) {
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321 response += ':' + nc + ':' + cnonce + ':' + qop;
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322 }
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323 response += ':' + md5(a2);
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324 response = md5(response);
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325 String val = "Digest";
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326 val += " username=\"" + authUsername + "\"";
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327 val += ", realm=\"" + realm + "\"";
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328 val += ", uri=\"" + uri + "\"";
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329 val += ", nonce=\"" + nonce + "\"";
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330 val += ", response=\"" + response + "\"";
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331 if( qop != null ) {
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332 val += ", qop=" + qop;
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333 val += ", nc=" + nc;
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334 val += ", cnonce=\"" + cnonce + "\"";
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335 }
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336 //System.out.println("val = "+val);
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337 throw new AuthException(val);
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338 } else
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339 throw new RuntimeException(auth.type);
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340 } catch(ParseException pe) {
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341 throw new LuanException(pe);
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342 }
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343 }
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344 String responseMessage = httpCon.getResponseMessage();
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345 InputStream is = httpCon.getErrorStream();
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346 if( is == null )
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347 throw e;
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348 Reader in = new InputStreamReader(is);
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349 String msg = Utils.readAll(in);
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350 in.close();
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351 LuanException le = new LuanException(msg,e);
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352 le.put("response_code",responseCode);
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353 le.put("response_message",responseMessage);
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354 throw le;
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355 }
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356 }
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357
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358 @Override public String to_string() {
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359 return url.toString();
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360 }
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361
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362 @Override public String to_uri_string() {
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363 return url.toString();
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364 }
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365
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366 private static String basicAuth(String username,String password) {
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367 String s = username + ':' + password;
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368 return "Basic " + Base64.getEncoder().encodeToString(s.getBytes());
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369 }
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370
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371 private final class AuthException extends Exception {
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372 final String authorization;
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373
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374 AuthException(String authorization) {
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375 this.authorization = authorization;
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376 }
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377 }
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378
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379 // retarded java api lacks this
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380 public static String fullPath(URL url) {
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381 String path = url.getPath();
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382 String query = url.getQuery();
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383 if( query != null )
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384 path += "?" + query;
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385 return path;
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386 }
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387
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388 // retarded java api lacks this
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389 public static String md5(String s) {
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390 try {
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391 byte[] md5 = MessageDigest.getInstance("MD5").digest(s.getBytes());
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392 StringBuffer sb = new StringBuffer();
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393 for( byte b : md5 ) {
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394 sb.append( String.format("%02x",b) );
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395 }
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396 return sb.toString();
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397 } catch(NoSuchAlgorithmException e) {
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398 throw new RuntimeException(e);
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399 }
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400 }
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401
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402 }