我正在嘗試使用HTMLUnit來生成我們的ajax頁面的可抓取HTML快照(如https://developers.google.com/webmasters/ajax-crawling/所示)。這個想法是創建功能,允許企業通過定期的定期服務或根據自己的意願創建快照。通過Tomcat運行HtmlUnit 7
我寫了一個快速的POC主類來測試理論,並按預期工作(當我們查看源代碼時,我們可以看到之前我們看不到的所有Google搜索器所需的數據)。我現在這個集成到我們的應用程序在Tomcat 7中運行,我在下載從谷歌的jquery.js與以下日誌消息
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)
...
沒有被執行的AJAX
因此和快照的問題不包含我們希望它的視圖源中的數據。有沒有人知道爲什麼會出現在我的Tomcat版本的代碼中,而不是在我的獨立主類中?這兩個版本都在我的本地機器上運行,其中一個僅在Tomcat(v7)中運行,另一個在Java應用程序中運行。兩個版本都有相同的Maven包含(見底部)。
注意:我試過在指定一個BrowserVersion時指定WebClient client = new WebClient(BrowserVersion.FIREFOX_17);
,因爲我讀過這樣會產生更好的結果(對不起,我記不起鏈接)。再次,這在POC中工作正常,但是當我在Tomcat中運行時,我看到日誌「Instatiating Web Client」,但無論等待多久,它永遠不會到達「Client Instatiated」或拋出任何異常。我不知道這是否與無法下載jqeury.js有關,因爲它仍然在沒有指定BrowserVersion的POC中工作。
這裏是工作
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);
}
這裏是我的集成版本
/* 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依賴我的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>
謝謝大家!
我發現我可以使用'webClient.getOptions()。setUseInsecureSSL(true);'試圖解決SSL問題。但是,當我將這行包含在其他'.getOptions()。set ...'statemtents之上時,代碼只是掛在這一行上(就像它在指定瀏覽器版本時一樣)。這意味着我仍然陷入困境。任何幫助非常感謝。 – DecafCoder 2013-03-18 10:21:01