Handle connection closures from proxy peers in async

src/worker/func.h

@@ -71,6 +71,8 @@ void fastcgi_frame_handler_func(fastcgi_ctx_t *ctx);
 
 void proxy_handler_func(client_ctx_t *ctx);
 
+void proxy_peer_handler_func(proxy_ctx_t *ctx);
+
 void ws_frame_handler_func(ws_ctx_t *ctx);
 
 void chunk_handler_func(chunk_ctx_t *ctx);

src/worker/proxy_handler.c

@@ -27,16 +27,21 @@ void proxy_handler_func(client_ctx_t *ctx) {
     respond(ctx);
 
     if (ret == 1) {
-        proxy_unlock_ctx(ctx->proxy);
+        // error status code
+        if (proxy_unlock_ctx(ctx->proxy) == 1)
+            proxy_peer_handle(ctx->proxy);
     } else if (ctx->use_proxy == 0) {
+        // proxy not used
         proxy_close(ctx->proxy);
         proxy_unlock_ctx(ctx->proxy);
     } else if (ctx->use_proxy == 1) {
+        // proxy is used
         if (proxy_handler_2(ctx) == 1) {
             // chunked
             return;
         }
-        proxy_unlock_ctx(ctx->proxy);
+        if (proxy_unlock_ctx(ctx->proxy) == 1)
+            proxy_peer_handle(ctx->proxy);
     } else if (ctx->use_proxy == 2) {
         // WebSocket
         ws_handle_connection(ctx);
@@ -112,7 +117,8 @@ static int proxy_handler_1(client_ctx_t *ctx) {
 }
 
 static void proxy_chunk_next_cb(chunk_ctx_t *ctx) {
-    proxy_unlock_ctx(ctx->client->proxy);
+    if (proxy_unlock_ctx(ctx->client->proxy) == 1)
+        proxy_peer_handle(ctx->client->proxy);
 
     ctx->client->proxy = NULL;
     request_complete(ctx->client);

src/worker/proxy_peer_handler.c

@@ -0,0 +1,17 @@
+/**
+ * sesimos - secure, simple, modern web server
+ * @brief Proxy peer handler
+ * @file src/worker/proxy_peer_handler.c
+ * @author Lorenz Stechauner
+ * @date 2023-07-07
+ */
+
+#include "func.h"
+#include "../logger.h"
+#include "../lib/utils.h"
+
+void proxy_peer_handler_func(proxy_ctx_t *ctx) {
+    if (!ctx->initialized || ctx->in_use) return;
+    logger_set_prefix("[%s%*s%s]", BLD_STR, ADDRSTRLEN, ctx->host, CLR_STR);
+    proxy_close(ctx);
+}