feat: add auth step

src/http_loop/http_loop_tools.c

@@ -97,3 +97,21 @@ bool http_loop_step_body_to_buf(event_loop_conn *conn) {
 
   return ctx->req.body_received == ctx->req.body_len;
 }
+
+bool http_loop_step_auth(event_loop_conn *conn) {
+  http_loop_ctx *ctx = conn->ctx;
+
+  for (size_t i = 0; i < ctx->req.num_headers; i++) {
+    struct phr_header *header = &ctx->req.headers[i];
+
+    if ((strncmp("X-Api-Key", header->name, header->name_len) == 0) &&
+        (strncmp(header->value, ctx->g->api_key, header->value_len) == 0)) {
+      return true;
+    }
+  }
+
+  ctx->res.status = http_unauthorized;
+  conn->state = event_loop_conn_state_res;
+
+  return true;
+}