JSoup登录网站并访问

Question

JSoup Login to website AND then open another page KEEPING that login session.

Could anyone explain how to log in on this website using JSoup?

Username:

Anything (E.G. 110000, 110001 and 110002 all work)

Password:

"sgl1617" (I don't care about someone knowing the password, you can't do anything with it.)

My code currently (Completely fails, I'm sure I'm on the wrong 'track'):

Connection.Response loginForm = Jsoup.connect("http://www.gymnasiumleiden.nl/roostersinfoweb/infoweb/index.php")
.method(Connection.Method.GET)
.execute();


Document doc = Jsoup.connect("http://www.gymnasiumleiden.nl/roostersinfoweb/infoweb/index.php").get();Jsoup.connect("http://www.gymnasiumleiden.nl/roostersinfoweb/infoweb/authentication.php")
.data("cookieexists", "false")
.data("username", "110638")
.data("password", "sgl1617")
.data("login", "Login")
.cookies(loginForm.cookies())
.post();

One thing I'm sure of: authentication.php doesn't exist.

I am new to JSoup, so please explain some code and tell me about the 'cookie' part (I know what cookies are, but not how you use them with JSoup.)

Answer 1

There are some points to correct:

• the login endpoint is not correct (the correct one is http://www.gymnasiumleiden.nl/roostersinfoweb/infoweb/index.php);
• some POST parameters you're sending are misspelled (e.g. username should be user);
• some POST parameters are not required (e.g. cookieexists);
• you're not adding the required csrf parameter in the POST request.
• you should check the response to understand if login is ok or not.

My working code (with an error checker):

Connection.Response loginForm = Jsoup
  .connect("http://www.gymnasiumleiden.nl/roostersinfoweb/infoweb/index.php")
  .method(Connection.Method.GET)
  .execute();

Document doc = loginForm.parse();
String csrf = doc.select("input[name=csrf]").val();
Connection.Response response = Jsoup.connect("http://www.gymnasiumleiden.nl/roostersinfoweb/infoweb/index.php")
        .data("user", "110638")
        .data("paswoord", "sgl1617")
        .data("login", "loginform")
        .data("csrf", csrf)
        .cookies(loginForm.cookies())
        .method(Connection.Method.POST)
        .execute();
String body = response.body();
if(body.contains("Wachtwoord is incorrect")){
    System.out.println("Password incorrect!");
} else if(body.contains("Gebruikersnaam werd niet gevonden.")){
    System.out.println("Not found username!");
} else {
    System.out.println("Login successfully!");          
}