From: Sergey Kandaurov <pluknet@nginx.com>
Date: Wed, 29 Apr 2026 19:02:20 +0000 (+0400)
Subject: Upstream: fixed parsing of split status lines
X-Git-Tag: release-1.31.0~3
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/postgres_fdw.c?a=commitdiff_plain;h=5f86648ef8c969e98aa2f7b938472296b12055be;p=nginx.git

Upstream: fixed parsing of split status lines

If the first response line was split across reads and it didn't appear
a status line, the portion already processed was lost.  The change
introduces a new field for proper backtracking on status line fallback.
---

diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index e33dc37fd..7e08df702 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1761,6 +1761,7 @@ ngx_http_proxy_process_status_line(ngx_http_request_t *r)
     }
 
     if (rc == NGX_ERROR) {
+        u->buffer.pos = ctx->status.line_start;
 
 #if (NGX_HTTP_CACHE)
 
diff --git a/src/http/modules/ngx_http_scgi_module.c b/src/http/modules/ngx_http_scgi_module.c
index 290394a1f..406b5f88f 100644
--- a/src/http/modules/ngx_http_scgi_module.c
+++ b/src/http/modules/ngx_http_scgi_module.c
@@ -1036,6 +1036,7 @@ ngx_http_scgi_process_status_line(ngx_http_request_t *r)
 
     if (rc == NGX_ERROR) {
         u->process_header = ngx_http_scgi_process_header;
+        u->buffer.pos = status->line_start;
         r->state = 0;
         return ngx_http_scgi_process_header(r);
     }
diff --git a/src/http/modules/ngx_http_uwsgi_module.c b/src/http/modules/ngx_http_uwsgi_module.c
index 4140b1b40..cb03ca77c 100644
--- a/src/http/modules/ngx_http_uwsgi_module.c
+++ b/src/http/modules/ngx_http_uwsgi_module.c
@@ -1275,6 +1275,7 @@ ngx_http_uwsgi_process_status_line(ngx_http_request_t *r)
 
     if (rc == NGX_ERROR) {
         u->process_header = ngx_http_uwsgi_process_header;
+        u->buffer.pos = status->line_start;
         r->state = 0;
         return ngx_http_uwsgi_process_header(r);
     }
diff --git a/src/http/ngx_http.h b/src/http/ngx_http.h
index 4e4511cc5..1b0e369f3 100644
--- a/src/http/ngx_http.h
+++ b/src/http/ngx_http.h
@@ -72,6 +72,7 @@ typedef struct {
     ngx_uint_t           http_version;
     ngx_uint_t           code;
     ngx_uint_t           count;
+    u_char              *line_start;
     u_char              *start;
     u_char              *end;
 } ngx_http_status_t;
diff --git a/src/http/ngx_http_parse.c b/src/http/ngx_http_parse.c
index ac10f561a..e1328da04 100644
--- a/src/http/ngx_http_parse.c
+++ b/src/http/ngx_http_parse.c
@@ -1703,6 +1703,8 @@ ngx_http_parse_status_line(ngx_http_request_t *r, ngx_buf_t *b,
 
         /* "HTTP/" */
         case sw_start:
+            status->line_start = p;
+
             switch (ch) {
             case 'H':
                 state = sw_H;