get Assertion rp hostname

src/main/java/com/example/rpserver/controller/GetAssertion.java

@@ -12,10 +12,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.ResponseBody;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import java.util.LinkedList;
 import java.util.List;
@@ -27,7 +24,7 @@ public class GetAssertion {
 	private CredentialRepository credentialRepository;
 	@ResponseBody
 	@PostMapping("/BeginGetAssertion")
-	public ResponseEntity<PublicKeyCredentialRequestOptions> beginGetAssertion(@RequestParam("username") String username){
+	public ResponseEntity<PublicKeyCredentialRequestOptions> beginGetAssertion(@RequestHeader("host") String hostname, @RequestParam("username") String username){
 		Challenge challenge = new DefaultChallenge();
 		List<Credential> credentials = credentialRepository.getCredentialsByUserName(username);
 		LinkedList<PublicKeyCredentialDescriptor> publicKeyCredentialDescriptors = new LinkedList<>();
@@ -35,7 +32,7 @@ public class GetAssertion {
 			PublicKeyCredentialDescriptor publicKeyCredentialDescriptor = new PublicKeyCredentialDescriptor(PublicKeyCredentialType.PUBLIC_KEY, credential.getRawId(), null);
 			publicKeyCredentialDescriptors.add(publicKeyCredentialDescriptor);
 		}
-		PublicKeyCredentialRequestOptions options = new PublicKeyCredentialRequestOptions(challenge, null, "localhost", publicKeyCredentialDescriptors, null, null);
+		PublicKeyCredentialRequestOptions options = new PublicKeyCredentialRequestOptions(challenge, null, hostname.split(":")[0], publicKeyCredentialDescriptors, null, null);
 		return ResponseEntity.ok(options);
 	}
 	@ResponseBody