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copied!<pre><code>final Response response = Jsoup.connect("https://account.mojang.com/migrate").execute(); // parse the response as a document, so that we can extract stuff final Document doc = response.parse(); // correct way to extract parsed html final Element authToken = doc.select("input[name^=authenticityToken]").get(0); final Map<String, String> cookies = response.cookies(); // action isn't part of the querystring. The form POST URL is our target. final Connection connection = Jsoup.connect("https://account.mojang.com/migrate/check") .data("authenticityToken", authToken.val()) // correct way to extract val .data("mcusername", "username") .data("password", "password") .method(Method.POST) .followRedirects(true); for (final Entry<String, String> cookie : cookies.entrySet()) { connection.cookie(cookie.getKey(), cookie.getValue()); } final Response postResponse = connection.execute(); // consume response System.out.println(postResponse.body()); </code></pre> <p>Response JSON:</p> <pre><code>{"error":"Invalid username or password."} </code></pre> <p>Your Mistakes:</p> <ol> <li><p>The form action is not a query string parameter. Thus <code>.data("action", "/migrate/check")</code> is incorrect. The form action is part of the POST URL as shown in my code above.</p></li> <li><p><code>Document document = connection.get();</code> is making a GET request at the URL. This is incorrect. <code>connection.execute()</code> has already made a POST. Just read the response, <code>final Response postResponse = connection.execute()</code>. </p></li> <li><p>There's no need to parse the hidden input, authenticityToken like that. Jsoup can do it for you as I have demonstrated. </p></li> </ol>

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