Optimise the read proc

fjord_test.odin

@@ -174,7 +174,7 @@ shutdown_concurrent_server :: proc(
     thread.destroy(t)
 }
 
-assert_endpoint :: proc(url: string, expected_response: string) {
+assert_endpoint_response :: proc(url: string, expected_response: string) {
     state, stdout, stderr, err := os2.process_exec(
         {command = []string{"curl", "-s", url}},
         context.temp_allocator,
@@ -232,15 +232,15 @@ test_server_general_ok :: proc(t: ^testing.T) {
 
     t := start_concurrent_server(&server)
 
-    assert_endpoint(
+    assert_endpoint_response(
         "http://127.0.0.1:8080/hello/world",
         "<div>Hello firstworld</div>",
     )
-    assert_endpoint(
+    assert_endpoint_response(
         "http://127.0.0.1:8080/hello/lonely%20world/only",
         "<div>Hello secondlonely%20world</div>",
     )
-    assert_endpoint(
+    assert_endpoint_response(
         "http://127.0.0.1:8080/hello/world/and/worlds%20friend",
         "<div>Hello thirdworldandworlds%20friend</div>",
     )

server.odin

@@ -26,11 +26,6 @@ Server :: struct($Error_Type: typeid) {
 }
 
 @(private)
-request_ended :: proc(buf: []byte) -> bool {
-    HTTP_END_SEQUENCE :: []byte{'\r', '\n', '\r', '\n'}
-    return bytes.index(buf, HTTP_END_SEQUENCE) != -1
-}
-
 read_connection :: proc(
     client_socket: net.TCP_Socket,
     allocator := context.temp_allocator,
@@ -39,6 +34,8 @@ read_connection :: proc(
     err: http.RequestError,
 ) {
     TCP_CHUNK_SIZE :: 1024
+    HTTP_END_SEQUENCE :: []byte{'\r', '\n', '\r', '\n'}
+
     buffer: bytes.Buffer
     bytes.buffer_init_allocator(&buffer, 0, 0, allocator)
 
@@ -48,9 +45,12 @@ read_connection :: proc(
         if net_err != nil do return data, .NetworkError
 
         if bytes_read == 0 do break
+
+        prev_len := len(buffer.buf)
         bytes.buffer_write(&buffer, chunk[:bytes_read])
 
-        if request_ended(buffer.buf[:]) do break
+        search_start := max(0, prev_len - 3)
+        if bytes.index(buffer.buf[search_start:], HTTP_END_SEQUENCE) != -1 do break
     }
 
     return buffer.buf[:], nil