2 files changed, 56 insertions, 23 deletions

diff --git a/src/api.c b/src/api.c
index 16cde8c..720c9b4 100644
--- a/src/api.c
+++ b/src/api.c
@@ -185,8 +185,6 @@ static enum MHD_Result handler(
 			return MHD_YES;
 		} else {
 
-			pthread_mutex_lock(&api->dht->mutex);
-
 			if(conn->state == OP_PENDING) {
 				if(!conn->target_set) {
 					response = MHD_create_response_from_buffer_static(0, NULL);
@@ -194,12 +192,16 @@ static enum MHD_Result handler(
 					goto end;
 				}
 
+				pthread_mutex_lock(&api->dht->mutex);
+
 				if(api->dht->lookup.state != OP_EMPTY) {
+					pthread_mutex_unlock(&api->dht->mutex);
 					response = MHD_create_response_from_buffer_static(0, NULL);
 					ret = MHD_queue_response(connection, MHD_HTTP_CONFLICT, response);
 					goto end;
 				}
 
+
 				// Start a lookup
 				memcpy(&api->dht->lookup.target, &conn->target, sizeof(struct nodeid));
 				api->dht->lookup.state = OP_PENDING;
@@ -211,7 +213,10 @@ static enum MHD_Result handler(
 					goto end;
 				}
 
-				if(api->dht->lookup.state != OP_COMPLETED) {
+				pthread_mutex_lock(&api->dht->mutex);
+
+				if(api->dht->lookup.state != OP_COMPLETED && api->dht->lookup.state != OP_EMPTY) {
+					pthread_mutex_unlock(&api->dht->mutex);
 					response = MHD_create_response_from_buffer_static(0, NULL);
 					ret = MHD_queue_response(connection, MHD_HTTP_CONFLICT, response);
 					goto end;
diff --git a/test/api.c b/test/api.c
index c88ed46..06edc9b 100644
--- a/test/api.c
+++ b/test/api.c
@@ -147,32 +147,35 @@ void test_lookup_get() {
 	dht.self = (struct nodeid){.inner={0x42424242, 0x42424242, 0x42424242, 0x42424242, 0x42424242}};
 	api_init(&dht);
 
-	curlRes = curl_easy_setopt(curl, CURLOPT_URL, "http://localhost:6982/lookup");
-	TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+	long code;
+	char *ct;
+	struct memory body = {0};
+	{
+		curlRes = curl_easy_setopt(curl, CURLOPT_URL, "http://localhost:6982/lookup");
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
 
-	curlRes = curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_to_memory);
-	TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+		curlRes = curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_to_memory);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
 
-	struct memory body = {0};
-	curlRes = curl_easy_setopt(curl, CURLOPT_WRITEDATA, &body);
-	TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+		curlRes = curl_easy_setopt(curl, CURLOPT_WRITEDATA, &body);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
 
-	curlRes = curl_easy_perform(curl);
-	TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+		curlRes = curl_easy_perform(curl);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
 
-	char *ct;
-	curlRes = curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &ct);
-	TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+		curlRes = curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &ct);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
 
-	TEST_ASSERT_EQUAL_STRING("application/json", ct);
+		TEST_ASSERT_EQUAL_STRING("application/json", ct);
 
-	TEST_ASSERT_EQUAL_STRING(
-		"{ "
-			"\"state\": \"empty\" "
-		"}", 
-		body.body
-	);
-	body = (struct memory){0};
+		TEST_ASSERT_EQUAL_STRING(
+			"{ "
+				"\"state\": \"empty\" "
+			"}", 
+			body.body
+		);
+		body = (struct memory){0};
+	}
 
 	{
 		curlRes = curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
@@ -206,6 +209,31 @@ void test_lookup_get() {
 		body = (struct memory){0};
 	}
 
+	{
+		curlRes = curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+
+		curlRes = curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_from_memory);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+
+		struct memory req_body = {
+			.body = "{\"state\": \"empty\"}",
+			.size = strlen(req_body.body),
+		};
+		curlRes = curl_easy_setopt(curl, CURLOPT_READDATA, &req_body);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+
+		curlRes = curl_easy_perform(curl);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+
+		curlRes = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
+		TEST_ASSERT_EQUAL(CURLE_OK, curlRes);
+		TEST_ASSERT_EQUAL(409, code);
+
+		body = (struct memory){0};
+	}
+
+
 	// The protocol does whatever and complete the lookup
 	dht.lookup.state = OP_COMPLETED;