feat(DevWeb): Projet - Login page, Login Api

2026-05-16 09:05:28 +00:00 · 2024-03-15 21:16:52 +01:00
parent a05ab6d2db
commit a9235dd3a9
18 changed files with 335 additions and 69 deletions
@@ -1,27 +0,0 @@
-package uppa.project.servlet;
-
-import java.io.*;
-import jakarta.servlet.http.*;
-import jakarta.servlet.annotation.*;
-
-@WebServlet(name = "helloServlet", value = "/hello-servlet")
-public class HelloServlet extends HttpServlet {
-    private String message;
-
-    public void init() {
-        message = "Hello World!";
-    }
-
-    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
-        response.setContentType("text/html");
-
-        // Hello
-        PrintWriter out = response.getWriter();
-        out.println("<html><body>");
-        out.println("<h1>" + message + "</h1>");
-        out.println("</body></html>");
-    }
-
-    public void destroy() {
-    }
-}
@@ -0,0 +1,93 @@
+package uppa.project.servlet;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+import uppa.project.dao.DAO;
+import uppa.project.dao.DAOException;
+import uppa.project.dao.jpa.Game_JPA_DAO_Factory;
+import uppa.project.servlet.json.ErrorApi;
+import uppa.project.pojo.User;
+import uppa.project.servlet.utils.RequestUtils;
+
+@WebServlet(name = "loginApiServlet", value = "/api/login")
+public class LoginServlet extends HttpServlet {
+
+  private final Gson gson = new Gson();
+
+  public void init() {
+  }
+
+  public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
+    response.setContentType("application/json");
+    response.setCharacterEncoding("UTF-8");
+    PrintWriter out = response.getWriter();
+
+    // Convert the string to a JSON object
+    JsonObject jsonBody;
+    try {
+      String requestBody = RequestUtils.getRequestBody(request);
+      jsonBody = JsonParser.parseString(requestBody).getAsJsonObject();
+    } catch (Exception e) {
+      int STATUS = 400;
+
+      ErrorApi error = new ErrorApi(STATUS, "Bad Request", "Invalid JSON");
+      response.setStatus(STATUS);
+      out.println(error.toJson());
+      return;
+    }
+
+    // Check if the username and password are present
+    JsonElement username = jsonBody.get("username");
+    JsonElement password = jsonBody.get("password");
+    if (username == null || password == null) {
+      int STATUS = 400;
+
+      ErrorApi error = new ErrorApi(STATUS, "Bad Request", "Username and password are required");
+      response.setStatus(STATUS);
+      out.println(error.toJson());
+      return;
+    }
+
+    // Get User from database matching the username and password
+    User user = LoginServlet.loginUser(username.getAsString(), password.getAsString());
+    if (user == null) {
+      int STATUS = 401;
+      ErrorApi error = new ErrorApi(STATUS, "Unauthorized", "Invalid username or password");
+
+      response.setStatus(STATUS);
+      out.println(error.toJson());
+      return;
+    }
+
+    // Return the user as JSON
+    String json = gson.toJson(user);
+    out.println(json);
+    out.flush();
+  }
+
+  private static User loginUser(String username, String password) {
+    Game_JPA_DAO_Factory factory = new Game_JPA_DAO_Factory();
+    try {
+      DAO<User> userDao = factory.getDAOUser();
+      User[] users = userDao.findByField("username", username);
+
+      for (User user : users) {
+        if (user.verifyPassword(password)) return user;
+      }
+    } catch (DAOException e) {
+      throw new RuntimeException(e);
+    }
+    return null;
+  }
+
+  public void destroy() {
+  }
+}
@@ -0,0 +1,32 @@
+package uppa.project.servlet.json;
+
+import com.google.gson.Gson;
+
+public class ErrorApi {
+  private final int status;
+  private final String error;
+  private final String message;
+
+  public ErrorApi(int status, String error, String message) {
+    this.status = status;
+    this.error = error;
+    this.message = message;
+  }
+
+  public int getStatus() {
+    return status;
+  }
+
+  public String getError() {
+    return error;
+  }
+
+  public String getMessage() {
+    return message;
+  }
+
+  public String toJson() {
+    Gson gson = new Gson();
+    return gson.toJson(this);
+  }
+}
@@ -0,0 +1,17 @@
+package uppa.project.servlet.utils;
+
+import jakarta.servlet.http.HttpServletRequest;
+import java.io.BufferedReader;
+import java.io.IOException;
+
+public class RequestUtils {
+  public static String getRequestBody(HttpServletRequest request) throws IOException {
+    StringBuilder sb = new StringBuilder();
+    BufferedReader reader = request.getReader();
+    String line;
+    while ((line = reader.readLine()) != null) {
+      sb.append(line);
+    }
+    return sb.toString();
+  }
+}