working on user login

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.oidc.backend/build.gradle

@@ -0,0 +1,20 @@
+plugins {
+    id 'java'
+}
+
+group = 'de.srsoftware'
+version = '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation platform('org.junit:junit-bom:5.10.0')
+    testImplementation 'org.junit.jupiter:junit-jupiter'
+    implementation project(':de.srsoftware.oidc.api')
+}
+
+test {
+    useJUnitPlatform()
+}

de.srsoftware.oidc.backend/src/main/java/de/srsoftware/oidc/backend/Backend.java

@@ -0,0 +1,44 @@
+/* © SRSoftware 2024 */
+package de.srsoftware.oidc.backend;
+
+import static java.net.HttpURLConnection.HTTP_NOT_FOUND;
+import static java.net.HttpURLConnection.HTTP_UNAUTHORIZED;
+
+import com.sun.net.httpserver.HttpExchange;
+import de.srsoftware.oidc.api.PathHandler;
+import java.io.IOException;
+import java.util.Optional;
+
+public class Backend extends PathHandler {
+	@Override
+	public void handle(HttpExchange ex) throws IOException {
+		String path   = relativePath(ex);
+		String method = ex.getRequestMethod();
+		System.out.printf("%s %s…", method, path);
+
+		if ("login".equals(path)) {
+			doLogin(ex);
+			return;
+		}
+		var token = getAuthToken(ex);
+		if (token.isEmpty()) {
+			emptyResponse(HTTP_UNAUTHORIZED, ex);
+			System.err.println("unauthorized");
+			return;
+		}
+		System.err.println("not implemented");
+		ex.sendResponseHeaders(HTTP_NOT_FOUND, 0);
+		ex.getResponseBody().close();
+	}
+
+	private void doLogin(HttpExchange ex) throws IOException {
+		Optional<String> user = getHeader(ex, "login-username");
+		Optional<String> pass = getHeader(ex, "login-password");
+		System.out.printf("%s : %s", user, pass);
+		emptyResponse(HTTP_UNAUTHORIZED, ex);
+	}
+
+	private Optional<String> getAuthToken(HttpExchange ex) {
+		return getHeader(ex, "Authorization");
+	}
+}