I have a chart that I am downloading with Javascript. I do not need to click a button from HtmlUnit because I am running through the Javascript that will do the download:
var imgData2 = canvas.toDataURL('image/png');
imgData2 = imgData2.replace('image/png', 'image/octet-stream');
var link2 = document.createElement("a");
link2.setAttribute("href", imgData2);
link2.setAttribute("download", fName + ".png");
link2.click();
When I launch to this directly, I can both view the live chart and I get a download of the static chart in my browser downloads file. URL:
http://a405bp3.rch.stglabs.ibm.com:2004/SystemiNavigator/com/ibm/as400/pt/dojoChart/DojoGraphScriptLauncher.html?packageId=IBM_CS&perspectiveId=P_WAITS_OVERVIEW&perspectiveName=Waits Overview&collectionName=Q035000004&collectionLib=QPFRDATA&collectionType=Collection Services File Based Collection&fileLevel=48&startTime=Feb 3, 2021 11:00:05 PM&endTime=Ongoing&systemName=A405BP3 &release=V7R3M0&collectionFormat=*CSFILE&basePerspId=
Resulting png file:
I want to duplicate this with HtmlUnit, but may be missing something in how this should be done.
The response header type is the image/png as expected (or image/octet-stream if I do the replace as above)
[content-type=image/png;charset=US-ASCII]
The content string looks like it is the png data: content string:�PNG
� ....
I am wondering 2 things:
- why isn't the download created when running in HtmlUnit? Is this supposed to work (the above code where link2 is created and clicked)?
_
link2.setAttribute("download", fName + ".png");
link2.click();
_
- if it doesn't work to automatically do the download, how do I need to process the results from HtmlUnit to get the png image in a file?
Right now I am getting a "blank screen" with this code:
try (final WebClient webClient = new WebClient(BrowserVersion.FIREFOX)) {
java.util.logging.Logger.getLogger("com.gargoylesoftware").setLevel(java.util.logging.Level.OFF);
webClient.getCache().clear();
webClient.getOptions().setCssEnabled(true);
webClient.getOptions().setJavaScriptEnabled(true);
webClient.setAjaxController(new NicelyResynchronizingAjaxController());
webClient.getOptions().setThrowExceptionOnScriptError(true);
Page page = webClient.getPage(url);
webClient.waitForBackgroundJavaScriptStartingBefore(10_000);
// Tried this with the same results:
//Page page2 = page.getEnclosingWindow().getEnclosedPage();
//WebResponse response = page2.getWebResponse();
WebResponse response = page.getWebResponse();
try {
IOUtils.copy(response.getContentAsStream(), outStream);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (outStream != null) {
try {
outStream.close();
}
catch (IOException e) {
}
}
}
webClient.close();
}
I have a chart that I am downloading with Javascript. I do not need to click a button from HtmlUnit because I am running through the Javascript that will do the download:
When I launch to this directly, I can both view the live chart and I get a download of the static chart in my browser downloads file. URL:
I want to duplicate this with HtmlUnit, but may be missing something in how this should be done.
The response header type is the image/png as expected (or image/octet-stream if I do the replace as above)
The content string looks like it is the png data: content string:�PNG
� ....
I am wondering 2 things:
_
_
Right now I am getting a "blank screen" with this code: