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src/main/java/de/jeyp91/tippligaforum/TippligaWebsiteConnector.java

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+package de.jeyp91.tippligaforum;
+
+import org.apache.http.NameValuePair;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.impl.client.BasicCookieStore;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.util.EntityUtils;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.*;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class TippligaWebsiteConnector {
+    CookieManager cm = new CookieManager(null, CookiePolicy.ACCEPT_ALL);
+
+    CookieStore cookieStore = cm.getCookieStore();
+    private static final Logger logger = LogManager.getLogger(TippligaWebsiteConnector.class);
+    private final HttpClient client;
+
+    public TippligaWebsiteConnector() throws IOException {
+        CookieHandler.setDefault(cm);
+
+        client = HttpClient.newBuilder()
+                .cookieHandler(CookieHandler.getDefault())
+                .connectTimeout(Duration.ofSeconds(10))
+                .build();
+        login();
+    }
+
+    private void login() throws IOException {
+        HttpRequest firstReq = HttpRequest.newBuilder()
+                .uri(URI.create("https://tippliga-wuerzburg.de/ucp.php?mode=login"))
+                .GET().build();
+
+        String firstReqBody = "";
+        try {
+            firstReqBody = client.send(firstReq, HttpResponse.BodyHandlers.ofString()).body();
+        } catch (IOException | InterruptedException e) {
+            e.printStackTrace();
+        }
+
+        List<HttpCookie> firstReqCookieList = cookieStore.getCookies();
+
+        Pattern pattern = Pattern.compile("^[\\s\\S]*<input type=\"hidden\" name=\"creation_time\" value=\"([\\d]{10})\" \\/>[\\s\\S]*<input type=\"hidden\" name=\"form_token\" value=\"([\\d\\w]{40})\" \\/>[\\s\\S]*<input type=\"hidden\" name=\"sid\" value=\"([\\d\\w]{32})\" \\/>[\\s\\S]*$");
+        Matcher matcher = pattern.matcher(firstReqBody);
+        matcher.find();
+        String creationTime = matcher.group(1);
+        String formToken = matcher.group(2);
+        String sid = matcher.group(3);
+
+        List<NameValuePair> urlParameters = new ArrayList<>();
+        urlParameters.add(new BasicNameValuePair("username", "Julian"));
+        urlParameters.add(new BasicNameValuePair("password", "original"));
+        urlParameters.add(new BasicNameValuePair("creation_time", creationTime));
+        urlParameters.add(new BasicNameValuePair("form_token", formToken));
+        urlParameters.add(new BasicNameValuePair("sid", sid));
+        urlParameters.add(new BasicNameValuePair("login", "Anmelden"));
+
+        HttpPost loginReq = new HttpPost("https://tippliga-wuerzburg.de/ucp.php?mode=login");
+        try {
+            loginReq.setEntity(new UrlEncodedFormEntity(urlParameters));
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+        }
+        String form = new String(loginReq.getEntity().getContent().readAllBytes());
+        String loginReqBody = "";
+        try {
+            CloseableHttpClient httpClient = HttpClients.createDefault();
+            CloseableHttpResponse response = httpClient.execute(loginReq);
+            loginReqBody = EntityUtils.toString(response.getEntity());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        List<HttpCookie> loginReqCookieList = cookieStore.getCookies();
+        logger.info(loginReqBody);
+    }
+}

src/test/java/de/jeyp91/tippligaforum/TippligaWebsiteConnectorTest.java

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+package de.jeyp91.tippligaforum;
+
+import org.junit.Test;
+
+import java.io.IOException;
+
+public class TippligaWebsiteConnectorTest {
+    @Test
+    public void getChecksumOfPostTest() throws IOException {
+        TippligaWebsiteConnector con = new TippligaWebsiteConnector();
+    }
+}