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Proxy: added ctx checking to input filters.

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The proxy module context may be NULL in case of filter finalization
(e.g. by image_filter) followed by an internal redirect.  This needs
some better handling, but for now just check if ctx is still here.
This commit is contained in:
Maxim Dounin 2012-04-23 10:40:01 +00:00
parent 8b89c882ce
commit c7bb162ffe
1 changed files with 18 additions and 0 deletions
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18
src/http/modules/ngx_http_proxy_module.c
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@ -1497,6 +1497,10 @@ ngx_http_proxy_input_filter_init(void *data)
u = r->upstream;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (ctx == NULL) {
return NGX_ERROR;
}
ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http proxy filter init s:%d h:%d c:%d l:%O",
u->headers_in.status_n, ctx->head, u->headers_in.chunked,
@ -1636,6 +1640,11 @@ ngx_http_proxy_parse_chunked(ngx_http_request_t *r, ngx_buf_t *buf)
} state;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (ctx == NULL) {
return NGX_ERROR;
}
state = ctx->state;
if (state == sw_chunk_data && ctx->size == 0) {
@ -1883,6 +1892,10 @@ ngx_http_proxy_chunked_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
r = p->input_ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (ctx == NULL) {
return NGX_ERROR;
}
b = NULL;
prev = &buf->shadow;
@ -2064,6 +2077,11 @@ ngx_http_proxy_non_buffered_chunked_filter(void *data, ssize_t bytes)
ngx_http_proxy_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (ctx == NULL) {
return NGX_ERROR;
}
u = r->upstream;
buf = &u->buffer;