Change LoginHandler response to always use JSON, add token-grabber.js example for interacting with the login API.

docs/examples/token-grabber.js

@@ -0,0 +1,23 @@
+import readline from 'readline/promises';
+import { stdin as input, stdout as output } from 'process';
+
+const rl = readline.createInterface({ input, output });
+
+const username = await rl.question('Please enter your username: ');
+const password = await rl.question('Please enter your password: ');
+
+rl.close();
+
+const loginResponse = await fetch('http://localhost:8080/login', {
+  method: 'POST',
+  headers: { 'Content-Type': 'application/json' },
+  body: JSON.stringify({ username, password })
+});
+
+const data = await loginResponse.json();
+if (data.success != 'true') {
+  console.log(`Login not successful: ${data.message}`);
+  process.exit(1);
+}
+const sessionID = data.sessionId;
+console.log(`Your token is: ${sessionID}`);

src/main/java/org/adrianvictor/livingroom/http/HttpResponse.java

@@ -1,5 +1,6 @@
 package org.adrianvictor.livingroom.http;
 
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -18,12 +19,20 @@ public record HttpResponse(
 
     public static HttpResponse text(int status, String text) {
         return new HttpResponse(
-                400,
+                status,
                 text.getBytes(),
                 Map.of()
         );
     }
 
+    public static HttpResponse json(int status, String text) {
+        return new HttpResponse(
+                status,
+                text.getBytes(StandardCharsets.UTF_8),
+                Map.of("Content-Type", "application/json")
+        );
+    }
+
     public static HttpResponse ok(byte[] body, String contentType) {
         return ok(body, contentType, new HashMap<>());
     }

src/main/java/org/adrianvictor/livingroom/http/handlers/LoginHandler.java

@@ -26,7 +26,8 @@ public class LoginHandler implements Handler {
         Session session = AuthenticationHelper.getAuthenticatedSession(exchange);
 
         if (session != null) {
-            return HttpResponse.text(400, "You're already logged in.");
+            String jsonResponse = "{\"success\": false, \"message\": \"You're already logged in.\"}";
+            return HttpResponse.json(400, jsonResponse);
         }
 
         try {
@@ -39,7 +40,8 @@ public class LoginHandler implements Handler {
             String password = (String) json.get("password");
 
             if (password == null || username == null) {
-                return HttpResponse.text(400, "You must provide an username and password.");
+                String jsonResponse = "{\"success\": false, \"message\": \"Invalid username or password.\"}";
+                return HttpResponse.json(400, jsonResponse);
             }
 
             try {
@@ -50,20 +52,23 @@ public class LoginHandler implements Handler {
                             "SESSIONID=" + s.getSessionId() + "; Path=/; HttpOnly; SameSite=Strict");
 
                     String jsonResponse = "{\"success\": true, \"sessionId\": \"" + s.getSessionId() + "\"}";
-                    return HttpResponse.ok(jsonResponse.getBytes(StandardCharsets.UTF_8), "application/json");
+                    return HttpResponse.json(200, jsonResponse);
                 } else {
-                    return HttpResponse.text(401, "Invalid username or password");
+                    String jsonResponse = "{\"success\": false, \"message\": \"Invalid username or password.\"}";
+                    return HttpResponse.json(401, jsonResponse);
                 }
             } catch (Exception e) {
                 Logger.error("User lookup error: " + e.getMessage());
-                return HttpResponse.text(401, "Invalid username or password");
+                String jsonResponse = "{\"success\": false, \"message\": \"Invalid username or password.\"}";
+                return HttpResponse.json(401, jsonResponse);
             }
         } catch (IOException e) {
             Logger.error("Error reading request body: " + e.getMessage());
-            return HttpResponse.text(400, "Invalid request");
+            String jsonResponse = "{\"success\": false, \"message\": \"Invalid request.\"}";
+            return HttpResponse.json(400, jsonResponse);
         } catch (ParseException e) {
-            Logger.error("Error parsing JSON: " + e.getMessage());
+            String jsonResponse = "{\"success\": false, \"message\": \"Invalid body JSON.\"}";
-            return HttpResponse.text(400, "Invalid JSON format");
+            return HttpResponse.json(400, jsonResponse);
         }
     }
 }