How do I obtain the filename associated with a page's outgoing link

[Brent Austin]

I have images in pages that are links to image attachments in other pages:

<ac:image>
    <ri:attachment ri:filename="home.jpg">
        <ri:page ri:content-title="Let's edit this page (step 3 of 9)" ri:space-key="ds" />
    </ri:attachment>
</ac:image>

I can obtain the linked page's space (ds) and title (Let's edit this page (step 3 of 9)) from the OutgoingLink object but not the filename.

How can I obtain the filename (home.jpg) so that I can access and download the linked attachment?

[Panos · Accepted solution]

The easy way but requires jsoup

Page p=<Load the page here>;
final ConversionContext conversionContext = new DefaultConversionContext(page.toPageContext());
String rendered = renderer.render(post.getBodyAsString(),conversionContext);
Document doc = Jsoup.parse(rendered); 
Elements images = doc.select("img");
for (Element el : images) {
    String imageUrl = el.attr("src");
	//Do something with image url
}

The harder way:

Pate p=<Load the page here>;
Pattern p1=Pattern.compile("(<ac:image\\s*(?:[ac:height=\"[0-9]*\"]*)?>.*?</ac:image>)");

Matcher m=p1.matcher(p.getBodyAsString());
if(m.find()){
	Document doc=loadXml(p.getBodyAsString());
	do{
		NodeList img = doc.getElementsByTagName("ac:image");
		Element element=(Element)img.item(0);
		//According to probable scenarios (1)

        //Do like:
		//element.getAttribute("ri:filename");
		//element.getAttribute("ri:space-key");
		//element.getAttribute("ri:content-title");
		//element.getAttribute("ri:value");
	}while(m.find());
}

private Document loadXMLFromString(String xml) throws Exception {
  DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
  DocumentBuilder builder = factory.newDocumentBuilder();
  InputSource is = new InputSource(new StringReader(xml));
  is.setEncoding("UTF-8");
  return builder.parse(is);
 }

where (1) is https://confluence.atlassian.com/doc/confluence-storage-format-283640220.html

Hope it helps

[Brent Austin]

Thanks for the information it was very useful to see a solution based on the page data rather than page related objects. I went for a combination of the two solutions that you provided: Document doc = Jsoup.parse(page.getBodyAsString(), "", Parser.xmlParser()); Elements images = doc.getElementsByTag("ac:image"); for (Element image : images) { Element attachment = image.getElementsByTag("ri:attachment").first(); if (attachment != null) { String fn = attachment.attr("ri:filename"); Element sourcePage = attachment.getElementsByTag("ri:page").first(); if (sourcePage != null) { String ct = sourcePage.attr("ri:content-title"); String sk = sourcePage.attr("ri:space-key"); } } }

[Panos]

I am glad it helped :)

[Brent Austin]

Hi Panos, thanks for your prompt reply.

I'm working on a java plugin which is downloading the images displayed in a page.

I can access the images directly attached to the page using attachmentManager.getLatestVersionsOfAttachments(page);

However, some images are displayed using links to attachments contained on other pages and to access these I was using page.getOutgoingLinks();

The problem is that the OutgoingLink object provides the space and title information for the referred page, but not the attachment filename.

It's the filename that I need and I cannot see anyway of obtaining it other than using some RegEx on the page content.

[Panos]

If i was you, i would follow the outgoing links and parse the ac:image macro. It happens to be working on parsing some similar situation, so if you decide to go that way i can help you further.

[Brent Austin]

Thanks for the information, yes I would like to see how you are parsing the ac:image tag. I am using the XhtmlContent class but this does not see ac:image as a macro.

[Panos]

This is relative format, so the home.jpg is attached to that page this macro is located.

Since you don't explain how you are obtaining - java? javascript? something else? - I enlist some of options:

1) Rest call to find the url:

Make a call to /rest/prototype/1/content/PAGEID_HERE/attachment, find the attachment with filename="home.jpg", extract field "link"->"href" from the json.

2) Use backend:

Page p=pageManager.getPage(PAGEID_HERE);
Attachment attachment = attachmentManager.getAttachment(p, "home.jpg");
attachment.getUrlPath();