我正在尝试使用HTMLUnit来生成我们的ajax页面的可抓取HTML快照(如https://developers.google.com/webmasters/ajax-crawling/所示)。这个想法是创建功能,允许企业通过定期的定期服务或根据自己的意愿创建快照。通过Tomcat运行HtmlUnit 7
我写了一个快速的POC主类来测试理论,并按预期工作(当我们查看源代码时,我们可以看到之前我们看不到的所有Google搜索器所需的数据)。我现在这个集成到我们的应用程序在Tomcat 7中运行,我在下载从谷歌的jquery.js与以下日志消息
2013-03-15 18:10:38,071 ERROR [author->taskExecutor-1] com.gargoylesoftware.htmlunit.html.HtmlPage : Error loading JavaScript from [https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.js].
javax.net.ssl.SSLException: hostname in certificate didn't match: <ajax.googleapis.com/173.194.67.95> != <*.googleapis.com> OR <*.googleapis.com> OR <googleapis.com>
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:228)
at org.apache.http.conn.ssl.BrowserCompatHostnameVerifier.verify(BrowserCompatHostnameVerifier.java:54)
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:149)
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:130)
at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:397)
at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:495)
at org.apache.http.conn.scheme.SchemeSocketFactoryAdaptor.connectSocket(SchemeSocketFactoryAdaptor.java:62)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:148)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:150)
...
没有被执行的AJAX
因此和快照的问题不包含我们希望它的视图源中的数据。有没有人知道为什么会出现在我的Tomcat版本的代码中,而不是在我的独立主类中?这两个版本都在我的本地机器上运行,其中一个仅在Tomcat(v7)中运行,另一个在Java应用程序中运行。两个版本都有相同的Maven包含(见底部)。
注意:我试过在指定一个BrowserVersion时指定WebClient client = new WebClient(BrowserVersion.FIREFOX_17);
,因为我读过这样会产生更好的结果(对不起,我记不起链接)。再次,这在POC中工作正常,但是当我在Tomcat中运行时,我看到日志“Instatiating Web Client”,但无论等待多久,它永远不会到达“Client Instatiated”或抛出任何异常。我不知道这是否与无法下载jqeury.js有关,因为它仍然在没有指定BrowserVersion的POC中工作。
这里是工作
OutputStreamWriter writer = null;
try {
final WebClient webClient = new WebClient();
webClient.getOptions().setThrowExceptionOnScriptError(false);
webClient.getOptions().setPrintContentOnFailingStatusCode(false);
final HtmlPage page = (HtmlPage)webClient.getPage("http://myurl.com");
webClient.waitForBackgroundJavaScript(1500);
File file = new File("C:\\test.html");
FileUtils.touch(file);
writer = new OutputStreamWriter(new FileOutputStream(file), "UTF-8");
writer.write(page.asXml());
writer.flush();
} catch (MalformedURLException mue) {
System.out.println("MalformedURL exception");
} catch (IOException ioe) {
System.out.println("IOException occurred " + ioe.getMessage());
} finally {
IOUtils.closeQuietly(writer);
}
这里是我的集成版本
/* Entry point for the generation */
public void generate() {
log.info("Beginning snapshot generation...");
try {
// Get the URLS
log.info("Retrieving list of page urls");
List<String> pageUrls = getUrlList();
log.info("Found {} urls to generate", pageUrls.size());
// For every url we have generate a snapshot
for (String pageUrl: pageUrls) {
takeSnapshot(pageUrl);
}
log.info("Finished generating snapshots!");
} catch (Exception e) {
log.error("Exception caught while generating snapshot", e);
}
}
/**
* Take the HTML snapshot of the url and output to the snapshot directory
*/
private void takeSnapshot(String pagePath) {
try {
String fullOutputFilePath = config.getHtmlSnapshotDirectory() + File.separator
+ pagePath + File.separator + HTML_SNAPSHOT_FILE_NAME;
String pageUrl = "http://myurl.com" + pagePath;
log.debug("Instantiating Web Client...");
final WebClient webClient = new WebClient();
log.debug("Client instantiated");
webClient.getOptions().setThrowExceptionOnScriptError(false);
webClient.getOptions().setPrintContentOnFailingStatusCode(false);
final HtmlPage page = (HtmlPage)webClient.getPage(pageUrl);
webClient.waitForBackgroundJavaScript(1500);
snapshotFile = new File(fullOutputFilePath);
FileUtils.touch(snapshotFile);
writer = new OutputStreamWriter(new FileOutputStream(snapshotFile), "UTF-8");
writer.write(page.asXml());
writer.flush();
} catch (MalformedURLException mue) {
System.out.println("MalformedURL exception");
} catch (IOException ioe) {
System.out.println("IOException occurred " + ioe.getMessage());
} finally {
IOUtils.closeQuietly(writer);
}
}
Maven依赖我的POC Java的主要方法
<dependency>
<groupId>net.sourceforge.htmlunit</groupId>
<artifactId>htmlunit</artifactId>
<version>2.12</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.2.3</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.3-alpha1</version>
</dependency>
谢谢大家!
我发现我可以使用'webClient.getOptions()。setUseInsecureSSL(true);'试图解决SSL问题。但是,当我将这行包含在其他'.getOptions()。set ...'statemtents之上时,代码只是挂在这一行上(就像它在指定浏览器版本时一样)。这意味着我仍然陷入困境。任何帮助非常感谢。 – DecafCoder 2013-03-18 10:21:01