author | stechong |
Thu, 14 May 2009 16:50:48 -0500 | |
changeset 153 | c847f1618fc8 |
parent 104 | 4ca9a303c257 |
child 417 | f902e026d524 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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package com.nokia.carbide.cpp.internal.news.reader.gen.FeedInfo; |
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|
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import java.io.File; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.net.HttpURLConnection; |
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import java.net.URISyntaxException; |
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import java.net.URL; |
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import java.net.URLConnection; |
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import org.eclipse.core.runtime.IPath; |
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import org.eclipse.core.runtime.Path; |
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import com.nokia.carbide.cpp.internal.news.reader.CarbideNewsReaderPlugin; |
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import com.nokia.cpp.internal.api.utils.core.FileUtils; |
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/** |
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* A class for managing feed information. |
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* |
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*/ |
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public class FeedInfoManager { |
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// private data |
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private static final String FEED_INFO_FILE_KEY = "com.nokia.carbide.cpp.news.reader.feed.listing.file"; |
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private static final String FEED_INFO_FILE_NAME = "feedListing.xml"; |
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private File feedInfoFile; |
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private FeedInfoType feedInfo; |
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/** |
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* Check whether a feed is news feed. |
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* @param feed - feed to be checked |
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* @return true if it is a news feed |
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*/ |
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public static boolean isNewsFeed(FeedType feed) { |
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return feed.getType().toLowerCase().equals(FeedInfoConstants.FEED_TYPE_NEWS); |
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} |
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|
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/** |
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* Check whether a feed is resource feed. |
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* @param feed - feed to be checked |
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* @return true if it is a resource feed |
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*/ |
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public static boolean isResourceFeed(FeedType feed) { |
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return feed.getType().toLowerCase().equals(FeedInfoConstants.FEED_TYPE_RESOURCE); |
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} |
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public static boolean isSubscribed(FeedType feed) { |
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String subscribed = feed.getType().toLowerCase(); |
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if (subscribed.equals(FeedInfoConstants.SUBSCRIBED_ALWAYS) || subscribed.equals(FeedInfoConstants.SUBSCRIBED_TRUE)) { |
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return true; |
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} |
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else { |
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return false; |
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} |
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} |
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/** |
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* Load feed information from a file. |
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* @param url - URL to the file |
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* @return true on success |
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*/ |
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public boolean loadFeedInfo(URL url) { |
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if (url == null) { |
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return false; |
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} |
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boolean success = true; |
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try { |
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feedInfo = FeedInfoLoader.loadFeedInfo(url); |
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success = (feedInfo != null); |
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} catch (URISyntaxException eURI){ |
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CarbideNewsReaderPlugin.log(eURI); |
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success = false; |
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} catch (IOException eIO){ |
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CarbideNewsReaderPlugin.log(eIO); |
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success = false; |
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} |
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return success; |
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} |
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/** |
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* Return the stored feed information. |
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* @return stored feed information |
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*/ |
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public FeedInfoType getFeedInfo() { |
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return feedInfo; |
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} |
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/** |
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* Retrieve the feed info file from remote server, make a local copy of this file |
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* and returns the URL to the local copy. |
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* @param useLocal - use local copy of feed listing file? |
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* @return URL of local copy of feed info file |
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* @throws Exception |
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*/ |
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public URL getFeedInfoFileURL(boolean useLocalCopy) throws Exception { |
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if (feedInfoFile == null) { |
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feedInfoFile = createFeedInfoFile(); |
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} |
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|
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if (useLocalCopy) { |
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// try to use local copy of the fee info file if it exists. |
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if (feedInfoFile != null && feedInfoFile.exists()) { |
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return feedInfoFile.toURL(); |
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} |
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else { |
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return null; |
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} |
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} |
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127 |
|
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128 |
// retrieve the feed info file from remote server and make a local copy of this file |
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String pathStr = CarbideNewsReaderPlugin.getFeedManager().getProperty(FEED_INFO_FILE_KEY); |
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if (pathStr != null) { |
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URL fileUrl = new URL(pathStr); |
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if (fileUrl != null) { |
99 | 133 |
HttpURLConnection connection = null; |
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InputStream inputStream = null; |
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try { |
99 | 136 |
connection = (HttpURLConnection) fileUrl.openConnection(); |
137 |
setRequestHeaders(connection); |
|
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connection.setUseCaches(false); |
99 | 139 |
connection.connect(); |
140 |
int responseCode = connection.getResponseCode(); |
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handlesHttpErrorCode(responseCode); |
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inputStream = connection.getInputStream(); |
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if (inputStream != null) { |
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144 |
if (feedInfoFile != null) { |
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if (feedInfoFile.exists()) { |
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feedInfoFile.delete(); |
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} |
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148 |
FileUtils.copyFile(inputStream, feedInfoFile); |
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return feedInfoFile.toURL(); |
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150 |
} |
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151 |
} |
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152 |
} catch (Exception e) { |
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153 |
CarbideNewsReaderPlugin.log(e); |
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154 |
} finally { |
99 | 155 |
if (connection != null) { |
156 |
connection.disconnect(); |
|
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157 |
} |
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158 |
if (inputStream != null) { |
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159 |
inputStream.close(); |
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160 |
} |
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161 |
} |
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|
162 |
} |
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163 |
} |
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164 |
|
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165 |
return null; |
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166 |
} |
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167 |
|
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168 |
/** |
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169 |
* Save feed information to a file. |
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170 |
* @param url - URL to the file |
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171 |
* @return true on success |
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172 |
*/ |
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173 |
public boolean saveFeedInfo(URL url) { |
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|
174 |
if (url == null) { |
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|
175 |
return false; |
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|
176 |
} |
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177 |
|
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178 |
boolean success = true; |
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179 |
try { |
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180 |
if (feedInfo != null) { |
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181 |
success = FeedInfoLoader.saveFeedInfo(feedInfo, url); |
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182 |
} |
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183 |
} catch (URISyntaxException eURI){ |
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184 |
CarbideNewsReaderPlugin.log(eURI); |
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185 |
success = false; |
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186 |
} catch (IOException eIO){ |
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|
187 |
CarbideNewsReaderPlugin.log(eIO); |
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|
188 |
success = false; |
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189 |
} |
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|
190 |
return success; |
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|
191 |
} |
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192 |
|
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193 |
/** |
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|
194 |
* Set the stored feed information |
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195 |
* @param feedInfo - incoming feed information |
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|
196 |
*/ |
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197 |
public void setFeedInfo(FeedInfoType feedInfo) { |
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198 |
this.feedInfo = feedInfo; |
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|
199 |
} |
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200 |
|
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201 |
/** |
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202 |
* Create a feed info file in the local temp directory. |
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|
203 |
* @return feed info file in the local temp directory |
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|
204 |
*/ |
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|
205 |
private File createFeedInfoFile() { |
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|
206 |
File tempDir = FileUtils.getTemporaryDirectory(); |
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|
207 |
IPath path = new Path(tempDir.getAbsolutePath()); |
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|
208 |
path = path.append(FEED_INFO_FILE_NAME); |
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|
209 |
File file = path.toFile(); |
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|
210 |
return file; |
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|
211 |
} |
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|
212 |
|
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|
213 |
/** |
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|
214 |
* Handles HTTP error codes. |
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|
215 |
* @param responseCode - HTTP response code |
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|
216 |
*/ |
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|
217 |
private void handlesHttpErrorCode(int responseCode) throws Exception { |
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|
218 |
if (responseCode == 403) { |
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|
219 |
throw new Exception("Authentication required for that resource. HTTP Response code was:" + responseCode); |
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|
220 |
} else if (responseCode >= 400 && responseCode < 500) { |
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|
221 |
throw new Exception("The requested resource could not be found. HTTP Response code was:" + responseCode); |
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|
222 |
} else if (responseCode >= 500 && responseCode < 600) { |
99 | 223 |
throw new Exception("The server encountered an error. HTTP Response code was:" + responseCode); |
0
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|
224 |
} |
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|
225 |
} |
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|
226 |
|
99 | 227 |
/** |
228 |
* Sets appropriate HTTP headers. |
|
229 |
* @param connection - URL connection |
|
230 |
*/ |
|
231 |
private void setRequestHeaders(URLConnection connection) { |
|
232 |
// specify acceptable content types |
|
233 |
connection.setRequestProperty("Accept", "*/xml"); |
|
234 |
} |
|
235 |
||
0
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|
236 |
} |