How to load ajax with HtmlUnit?

Question

import java.io.IOException;
import java.net.MalformedURLException;
import java.util.List;

import com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlAnchor;
import com.gargoylesoftware.htmlunit.html.HtmlButton;
import com.gargoylesoftware.htmlunit.html.HtmlForm;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.HtmlTextInput;

public class YoutubeBot {
private static final String YOUTUBE = "http://www.youtube.com";

public static void main(String[] args) throws FailingHttpStatusCodeException, MalformedURLException, IOException {
    WebClient webClient = new WebClient();
    webClient.setThrowExceptionOnScriptError(false);

    // This is equivalent to typing youtube.com to the adress bar of browser
    HtmlPage currentPage = webClient.getPage("http://www.youtube.com/results?search_type=videos&search_query=official+music+video&search_sort=video_date_uploaded&suggested_categories=10%2C24&uni=3");

    // Get form where submit button is located
    HtmlForm searchForm = (HtmlForm) currentPage.getElementById("masthead-search");

    // Get the input field.
    HtmlTextInput searchInput = (HtmlTextInput) currentPage.getElementById("masthead-search-term");
    // Insert the search term.
    searchInput.setText("java");

    // Workaround: create a 'fake' button and add it to the form.
    HtmlButton submitButton = (HtmlButton) currentPage.createElement("button");
    submitButton.setAttribute("type", "submit");
    searchForm.appendChild(submitButton);

    //Workaround: use the reference to the button to submit the form. 
    HtmlPage newPage = submitButton.click();

    //Find all links on page with given class
    final List<HtmlAnchor> listLinks = (List<HtmlAnchor>) currentPage.getByXPath("//a[@class='ux-thumb-wrap result-item-thumb']");      

    //Print all links to console
    for (int i=0; i<listLinks.size(); i++)
        System.out.println(YOUTUBE + listLinks.get(i).getAttribute("href"));

    }
}

This code is working but I just want to sort youtube clips for example by upload date. How to do this with HtmlUnit? I have to click on filter, this should load content by ajax request and then I should click on "Upload date" link. I just don't know this first step, to load ajax content. Is this possible with HtmlUnit?

Answer 1

This worked for me. Set this

webClient.setAjaxController(new NicelyResynchronizingAjaxController());

This would cause all ajax calls to be synchronous.

This is how I setup my WebClient object

WebClient webClient = new WebClient(BrowserVersion.CHROME);
webClient.getOptions().setJavaScriptEnabled(true);
webClient.getOptions().setCssEnabled(false);
webClient.getOptions().setUseInsecureSSL(true);
webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
webClient.getCookieManager().setCookiesEnabled(true);
webClient.setAjaxController(new NicelyResynchronizingAjaxController());
webClient.getOptions().setThrowExceptionOnScriptError(false);
webClient.getCookieManager().setCookiesEnabled(true);