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/*******************************************************************************
* Copyright (c) 2012 Tasktop Technologies and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.gerrit.core.client;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.ParseException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.text.html.HTML.Tag;
import org.apache.commons.lang.StringEscapeUtils;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.mylyn.commons.core.HtmlStreamTokenizer;
import org.eclipse.mylyn.commons.core.HtmlStreamTokenizer.Token;
import org.eclipse.mylyn.commons.core.HtmlTag;
import org.eclipse.mylyn.commons.core.StatusHandler;
import org.eclipse.mylyn.internal.gerrit.core.GerritCorePlugin;
import org.eclipse.mylyn.internal.gerrit.core.client.compat.GerritConfigX;
public class GerritHtmlProcessor {
private static GerritConfigX gerritConfigFromString(String token) {
try {
JSonSupport support = new JSonSupport();
return support.getGson().fromJson(token, GerritConfigX.class);
} catch (Exception e) {
StatusHandler.log(new Status(IStatus.ERROR, GerritCorePlugin.PLUGIN_ID,
"Failed to deserialize Gerrit configuration: '" + token + "'", e));
return null;
}
}
private static String getText(HtmlStreamTokenizer tokenizer) throws IOException, ParseException {
StringBuilder sb = new StringBuilder();
for (Token token = tokenizer.nextToken(); token.getType() != Token.EOF; token = tokenizer.nextToken()) {
if (token.getType() == Token.TEXT) {
sb.append(token.toString());
} else if (token.getType() == Token.COMMENT) {
// ignore
} else {
break;
}
}
return StringEscapeUtils.unescapeHtml(sb.toString());
}
private GerritConfigX config;
private String xsrfKey;
/**
* Introduced in Gerrit 2.6 as a replacement for {@link #xsrfKey}.
*/
private String xGerritAuth;
public GerritConfigX getConfig() {
return config;
}
public String getXsrfKey() {
return xsrfKey;
}
public String getXGerritAuth() {
return xGerritAuth;
}
public void parse(InputStream in, String charset) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(in, charset));
HtmlStreamTokenizer tokenizer = new HtmlStreamTokenizer(reader, null);
try {
for (Token token = tokenizer.nextToken(); token.getType() != Token.EOF; token = tokenizer.nextToken()) {
if (token.getType() == Token.TAG) {
HtmlTag tag = (HtmlTag) token.getValue();
if (tag.getTagType() == Tag.SCRIPT) {
String text = getText(tokenizer);
text = text.replaceAll("\n", ""); //$NON-NLS-1$ //$NON-NLS-2$
text = text.replaceAll("\\s+", " "); //$NON-NLS-1$ //$NON-NLS-2$
parse(text);
}
}
}
} catch (ParseException e) {
throw new IOException("Error reading url"); //$NON-NLS-1$
}
}
/**
* Parses the configuration from <code>text</code>.
*/
private void parse(String text) {
Pattern p = Pattern.compile("var gerrit_hostpagedata=\\{(\"version\":\"([^\"]+)\",)?\"config\":"); //$NON-NLS-1$
String configXsrfToken = "hostpagedata.xsrfToken=\""; //$NON-NLS-1$
String configXGerritAuth = "hostpagedata.xGerritAuth=\""; //$NON-NLS-1$
String[] tokens = text.split(";gerrit_"); //$NON-NLS-1$
for (String token : tokens) {
Matcher m = p.matcher(token);
if (m.find()) {
token = token.substring(m.toMatchResult().group(0).length());
// remove closing }
token = token.substring(0, token.length() - 1);
this.config = gerritConfigFromString(token);
} else if (token.startsWith(configXsrfToken)) {
token = token.substring(configXsrfToken.length());
// remove closing "
token = token.substring(0, token.length() - 1);
this.xsrfKey = token;
} else if (token.startsWith(configXGerritAuth)) {
token = token.substring(configXGerritAuth.length());
// remove closing "
token = token.substring(0, token.length() - 1);
this.xGerritAuth = token;
}
}
}
}
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