Jsoup, get value before executing form POST

Question

Here is code i am using to submit a form:

Connection.Response res = Jsoup.connect("http://example.com")
    .data("id", "myID")
    .data("username", "myUsername")
    .data("code", "MyAuthcode") // get the value of Auth code from page element
    .method(Method.POST).execute();

To submit the given form successfully, the field with [name="code"] needs to have a value set.

The value can be found on the page in another element. How on earth do I get the value of an element using the same connection, before actually submitting the form as shown above?

I need to use a value from an element, to fill out the form successfully..

Really, no one's got anything? – ThatGuy343 Aug 19 '14 at 20:17 — ThatGuy343, Aug 19 '14 at 20:17

Spectre · Accepted Answer · 2014-08-19T21:22:28.623

1

Jsoup actually opens a new HTTP connection for each request so what your asking isn't quite possible but you can get close:

// Define where to connect (doesn't actually connect)
Connection connection = Jsoup.connect("http://example.com");

// Connect to the server and get the page
Document doc = connection.get();

// Extract the value from the page
String authCode = doc.select("input[name='code']").val();

// Add the required data to the request
connection.data("id", "myID")
    .data("username", "myUsername")
    .data("code", authCode);

// Connect to the server and do a post
Connection.Response response = connection.method(Method.POST).execute();

This would make two HTTP request (one each for the GET and the POST) each over there own connection.

If you really want only one connection you'll have to use a different tool for connecting to the server (eg. Apache - HTTPClient). You would still be able to use jsoup to parse what you get back using Jsoup.parse().

edited Aug 19 '14 at 21:22

answered Aug 19 '14 at 21:12

Spectre

648
3
6

But the value is different with each connection :/ so using the second connections value on the connection that posts would not work. – ThatGuy343 Aug 19 '14 at 21:14
Aside from Jsoup, is there another way i can do this in Java? It cant be impossible to get data from page, then POST form.... – ThatGuy343 Aug 19 '14 at 21:15
Looks like i'm going to have to use HTTPClient then. Thanks – ThatGuy343 Aug 19 '14 at 21:25

score 0 · Answer 2 · edited May 23 '17 at 12:06

0

You would need to get the cookies form the GET call and add them in the subsequent POST call , so that session is maintained. Look at the solution from this post Getting Captcha image using jsoup

edited May 23 '17 at 12:06

Community

1
1

answered Jun 02 '16 at 06:30

Sagar

96
1
6

Jsoup, get value before executing form POST

2 Answers2

Linked