使用Jsoup提取图像ID

Question

I am trying to extract a specific captcha image id using api Jsoup, the html image tag is like :

<img id="wlspispHIPBimg03256465465dsd5456" style="display: inline; width: 200px; height: 100px;" aria-hidden="true" src="https://users/hip/data/rnd=435cb60d0a6b63ef4">

This is my code to obtain the attribute id="wlspispHIPBimg03256465465dsd5456" :

doc = Jsoup.connect("http://go.microsoft.com/fwlink/?LinkID=614866&clcid")
                .timeout(0).get();

Elements images = doc.select("img[src~=(?i)]");
for (Element image : images) {
    System.out.println(image.attr("id"));
}

The problem is that i can't get the id of captcha image

Answer 1

You need to find something in the html that discriminates the img tag of any other tag in the document. From your posted code that is can't be deduced, so i use my imagination here:

Element imageEl = doc.select("img[scr*=rnd]").first();

This exploits that the source of the image contains "rnd" in it path. To get the best solution you must look yourself. Also it helps a lot if you learn the CSS selectors of Jsoup.

Answer 2

I think you simply can't accomplish this using only Jsoup, the DOM is modified at runtime with javascript and jsoup simply does not execute it.

View also this other question .