Mercurial > dive4elements > http-client

annotate src/main/java/de/intevation/artifacts/httpclient/http/HttpClientImpl.java @ 3:19a617578b88

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Added a new method to the HttpClient that triggers the creation of a new artifact collection. http-client/trunk@1398 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 04 Mar 2011 11:49:49 +0000
parents 2fdfa20cfa63
children 19b3ba7f2568
rev   line source
1
c9ac6642973c Renamed GNVClient and GNVClientImpl to HttpClient and HttpClientImpl.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8 package de.intevation.artifacts.httpclient.http;
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9
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10 import java.io.InputStream;
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11 import java.io.IOException;
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12 import java.io.OutputStream;
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13
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14 import org.apache.log4j.Logger;
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15
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16 import org.restlet.Client;
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17 import org.restlet.Request;
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18 import org.restlet.Response;
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19 import org.restlet.data.MediaType;
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20 import org.restlet.data.Method;
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21 import org.restlet.data.Protocol;
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22 import org.restlet.data.Status;
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23 import org.restlet.ext.xml.DomRepresentation;
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24 import org.restlet.representation.Representation;
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25
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26 import org.w3c.dom.Document;
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27
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28 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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29 import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler;
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30 import de.intevation.artifacts.httpclient.http.response.ResponseHandler;
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31 import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler;
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32 import de.intevation.artifacts.httpclient.objects.Artifact;
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33 import de.intevation.artifacts.httpclient.objects.ArtifactFactory;
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34 import de.intevation.artifacts.httpclient.utils.ArtifactProtocolUtils;
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35 import de.intevation.artifacts.httpclient.utils.ArtifactCreator;
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36
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37
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38 /**
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39 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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40 */
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41 public class HttpClientImpl implements HttpClient {
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42
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43 private static final Logger logger = Logger.getLogger(HttpClient.class);
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44
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45 /** The URL path of the resource to create new artifact collections.*/
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46 public static final String PATH_CREATE_COLLECTION = "/create-collection";
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47
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48 private String serverUrl;
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49
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50
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51 public HttpClientImpl(String serverUrl) {
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52 this.serverUrl = serverUrl;
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53 }
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54
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55
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56 @Override
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57 public ArtifactFactory[] getArtifactFactories()
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58 throws ConnectionException
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59 {
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60 ResponseHandler handler = new DocumentResponseHandler();
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61
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62 try {
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63 String url = serverUrl + "/factories";
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64 Document result = (Document) handler.handle(doGet(url));
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65
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66 return ArtifactProtocolUtils.extractArtifactFactories(result);
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67 }
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68 catch (IOException ioe) {
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69 throw new ConnectionException(
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70 "Connection to server failed. No Factories recieved.");
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71 }
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72 }
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73
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74
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75 /**
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76 * This method creates a new artifact in the artifact server and returns
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77 * this artifact. The new artifact is created using <i>creator</i>. If no
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78 * {@link ArtifactCreator} is given (null), an {@link Artifact} is returned.
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79 *
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80 * @param doc The CREATE document.
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81 * @param creator The {@link ArtifactCreator} that is used to extract the
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82 * new artifact from response document of the server.
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83 *
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84 * @return the new artifact.
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85 */
1
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86 @Override
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87 public Object create(Document doc, ArtifactCreator creator)
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88 throws ConnectionException
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89 {
1
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90 ResponseHandler handler = new DocumentResponseHandler();
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91
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92 try {
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93 String url = serverUrl + "/create";
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94 Document result = (Document) handler.handle(doPost(url, doc));
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95
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96 return creator == null
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97 ? ArtifactProtocolUtils.extractArtifact(result)
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98 : creator.create(result);
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99 }
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100 catch (IOException ioe) {
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101 throw new ConnectionException(
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102 "Connection to server failed. No Artifact created.");
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103 }
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104 }
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105
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106
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107 /**
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108 * This method triggers the artifact servers resource to create a new
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109 * artifact collection.
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110 *
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111 * @param create The CREATE document for the collection.
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112 * @param ownerId The uuid of the creator.
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113 * @param handler The handler that is used to create the result object.
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114 *
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115 * @return a result object created by <i>handler</i>.
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116 */
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117 public Object createCollection(
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118 Document create,
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119 String ownerId,
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120 ResponseHandler handler)
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121 throws ConnectionException
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122 {
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123 String url = serverUrl + PATH_CREATE_COLLECTION + "/" + ownerId;
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124
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125 try {
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126 return handler.handle(doPost(url, create));
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127 }
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128 catch (IOException ioe) {
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129 throw new ConnectionException(ioe.getMessage(), ioe);
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130 }
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131 }
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132
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133
1
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134 @Override
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135 public Object describe(
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136 Artifact artifact,
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137 Document doc,
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138 ResponseHandler handler)
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139 throws ConnectionException
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140 {
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141 try {
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142 String url = serverUrl + "/artifact/" + artifact.getUuid();
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143 return handler.handle(doPost(url, doc));
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144 }
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145 catch (IOException ioe) {
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146 throw new ConnectionException(
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147 "Connection to server failed: " + ioe.getMessage());
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148 }
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149 }
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150
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151
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152 @Override
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153 public Object feed(Artifact artifact, Document doc, ResponseHandler handler)
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154 throws ConnectionException
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155 {
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156 try {
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157 String url = serverUrl + "/artifact/" + artifact.getUuid();
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158 Document result = (Document) handler.handle(doPost(url, doc));
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159
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160 return result;
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161 }
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162 catch (IOException ioe) {
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163 throw new ConnectionException(
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164 "Connection to server failed: " + ioe.getMessage());
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165 }
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166 }
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167
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168
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169 @Override
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170 public Object advance(Artifact artifact, Document doc, ResponseHandler handler)
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171 throws ConnectionException
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172 {
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173 try {
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174 String url = serverUrl + "/artifact/" + artifact.getUuid();
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175 Document result = (Document) handler.handle(doPost(url, doc));
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176
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177 return result;
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178 }
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179 catch (IOException ioe) {
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180 throw new ConnectionException(
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181 "Connection to server failed: " + ioe.getMessage());
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182 }
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183 }
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184
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185
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186 @Override
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187 public void out(
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188 Artifact artifact,
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189 Document doc,
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190 String target,
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191 OutputStream out)
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192 throws ConnectionException
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193 {
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194 try {
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195 String url =
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196 serverUrl
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197 + "/artifact/"
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198 + artifact.getUuid()
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199 + "/" + target;
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200
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201 ResponseHandler handler = new StreamResponseHandler();
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202
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203 InputStream stream = (InputStream) handler.handle(doPost(url, doc));
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204
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205 byte[] b = new byte[4096];
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206 int i = -1;
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207 while ((i = stream.read(b)) > 0) {
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208 out.write(b, 0, i);
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209 }
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210 }
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diff changeset
211 catch (IOException ioe) {
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212 throw new ConnectionException(
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213 "Connection to server failed: " + ioe.getMessage());
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214 }
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215 }
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216
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217
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218 private Response doPost(String url, Document body) throws IOException {
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219 logger.info("Start HTTP-POST request to: "+ url);
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220
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221 Client client = new Client(Protocol.HTTP);
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222 Request request = new Request(Method.POST, url);
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223
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224 Representation representation = new DomRepresentation(
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225 MediaType.APPLICATION_XML,
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226 body);
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227
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228 request.setEntity(representation);
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229 Response response = client.handle(request);
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230
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231 Status status = response.getStatus();
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232 if (status.getCode() != 200) {
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233 logger.error("Response status: " + status.getCode());
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234 throw new IOException(status.getDescription());
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235 }
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236
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237 return response;
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238 }
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239
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240
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241 private Response doGet(String url) throws IOException {
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242 logger.info("Start HTTP-POST request to: "+ url);
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243
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244 Client client = new Client(Protocol.HTTP);
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245 Request request = new Request(Method.GET, url);
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246
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247 Response response = client.handle(request);
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248
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249 Status status = response.getStatus();
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250 if (status.getCode() != 200) {
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251 logger.error("Response status: " + status.getCode());
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252 throw new IOException(status.getDescription());
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253 }
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254
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255 return response;
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256 }
c9ac6642973c Renamed GNVClient and GNVClientImpl to HttpClient and HttpClientImpl.
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257 }
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258 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org