In an HTML page, I want to pick the value of a javascript variable.
Below is the snippet of HTML page:
<input id="hidval" value="" type="hidden">
<form method="post" style="padding: 0px;margin: 0px;" name="profile" autocomplete="off">
<input name="pqRjnA" id="pqRjnA" value="" type="hidden">
<script type="text/javascript">
key="pqRjnA";
</script>
My aim is to read the value of variable key from this page using jsoup.
Is it possible with jsoup? If yes then how?
Since jsoup isn't a javascript library you have two ways to solve this:
Pro:
Con:
Pro:
Con:
Here's an example how to get the key with jsoupand some "manual" code:
Document doc = ...
Element script = doc.select("script").first(); // Get the script part
Pattern p = Pattern.compile("(?is)key=\"(.+?)\""); // Regex for the value of the key
Matcher m = p.matcher(script.html()); // you have to use html here and NOT text! Text will drop the 'key' part
while( m.find() )
{
System.out.println(m.group()); // the whole key ('key = value')
System.out.println(m.group(1)); // value only
}
Output (using your html part):
key="pqRjnA"
pqRjnA
Jsoup + manual parsing is very good solution for this, but breaking while I am using the js variable as array. eg: keyArray = [1, 2, 3] can you please give me solution for this.
(?s)(keyArray)\\s??=\\s??\\[(.*?)\\]. If defined two groups: Group 1 = variable name, group 2 = value (those within [ ]).
abc.xyz.init({requiredJsonObjectAsAnArgument}); inside script tags and I want to parse requiredJsonObjectAsAnArgument only. Can you suggest me the applicable regex for this case?(?s)\\.init\\(\\{(.+?)\\}\\); - group #1 contains the requiredJsonObjectAsAnArgument.The Kotlin question is marked as duplicate and is directed to this question.
So, here is how I did that with Kotlin:
val (key, value) = document
.select("script")
.map(Element::data)
.first { "key" in it } // OR single { "key" in it }
.split("=")
.map(String::trim)
val pureValue = value.replace(Regex("""["';]"""), "")
println("$key::$pureValue") // key::pqRjnA
Another version:
val (key, value) = document
.select("script")
.first { Regex("""key\s*=\s*["'].*["'];""") in it.data() }
.data()
.split("=")
.map { it.replace(Regex("""[\s"';]"""), "") }
println("$key::$value") // key::pqRjnA
To get the document you can do this:
val input = File("my-document.html")
val document = Jsoup.parse(input, "UTF-8")
val document = Jsoup.connect("the/target/url")
.userAgent("Mozilla")
.get()
key.