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fix cached FastCGI response with large stderr output before header

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This commit is contained in:
Igor Sysoev 2010-03-03 10:43:38 +00:00
parent 750a65ef84
commit 593dec8b35
2 changed files with 56 additions and 4 deletions
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57
src/http/modules/ngx_http_fastcgi_module.c
View File

@ -62,7 +62,8 @@ typedef struct {
size_t length;
size_t padding;
ngx_uint_t fastcgi_stdout; /* unsigned :1 */
unsigned fastcgi_stdout:1;
unsigned large_stderr:1;
ngx_array_t *split_parts;
@ -1081,6 +1082,7 @@ ngx_http_fastcgi_reinit_request(ngx_http_request_t *r)
f->state = ngx_http_fastcgi_st_version;
f->fastcgi_stdout = 0;
f->large_stderr = 0;
return NGX_OK;
}
@ -1099,6 +1101,7 @@ ngx_http_fastcgi_process_header(ngx_http_request_t *r)
ngx_table_elt_t *h;
ngx_http_upstream_t *u;
ngx_http_fastcgi_ctx_t *f;
ngx_http_fastcgi_header_t *fh;
ngx_http_upstream_header_t *hh;
ngx_http_fastcgi_loc_conf_t *flcf;
ngx_http_fastcgi_split_part_t *part;
@ -1223,8 +1226,17 @@ ngx_http_fastcgi_process_header(ngx_http_request_t *r)
* of the PHP warnings to not allocate memory
*/
u->buffer.pos = u->buffer.start;
u->buffer.last = u->buffer.start;
#if (NGX_HTTP_CACHE)
if (r->cache) {
u->buffer.pos = u->buffer.start
+ r->cache->header_start;
} else {
u->buffer.pos = u->buffer.start;
}
#endif
u->buffer.last = u->buffer.pos;
f->large_stderr = 1;
}
return NGX_AGAIN;
@ -1240,6 +1252,45 @@ ngx_http_fastcgi_process_header(ngx_http_request_t *r)
/* f->type == NGX_HTTP_FASTCGI_STDOUT */
#if (NGX_HTTP_CACHE)
if (f->large_stderr) {
u_char *start;
ssize_t len;
start = u->buffer.start + r->cache->header_start;
len = u->buffer.pos - start - 2 * sizeof(ngx_http_fastcgi_header_t);
/*
* A tail of large stderr output before HTTP header is placed
* in a cache file without a FastCGI record header.
* To workaround it we put a dummy FastCGI record header at the
* start of the stderr output or update r->cache_header_start,
* if there is no enough place for the record header.
*/
if (len >= 0) {
fh = (ngx_http_fastcgi_header_t *) start;
fh->version = 1;
fh->type = NGX_HTTP_FASTCGI_STDERR;
fh->request_id_hi = 0;
fh->request_id_lo = 1;
fh->content_length_hi = (u_char) ((len >> 8) & 0xff);
fh->content_length_lo = (u_char) (len & 0xff);
fh->padding_length = 0;
fh->reserved = 0;
} else {
r->cache->header_start += u->buffer.pos - start
- sizeof(ngx_http_fastcgi_header_t);
}
f->large_stderr = 0;
}
#endif
f->fastcgi_stdout = 1;
start = u->buffer.pos;

3
src/http/ngx_http_file_cache.c
View File

@ -346,7 +346,7 @@ ngx_http_file_cache_read(ngx_http_request_t *r, ngx_http_cache_t *c)
h = (ngx_http_file_cache_header_t *) c->buf->pos;
if (h->crc32 != c->crc32 || (size_t) h->header_start != c->header_start) {
if (h->crc32 != c->crc32) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
"cache file \"%s\" has md5 collision", c->file.name.data);
return NGX_DECLINED;
@ -358,6 +358,7 @@ ngx_http_file_cache_read(ngx_http_request_t *r, ngx_http_cache_t *c)
c->last_modified = h->last_modified;
c->date = h->date;
c->valid_msec = h->valid_msec;
c->header_start = h->header_start;
c->body_start = h->body_start;
r->cached = 1;