nginx/src/event/ngx_event_pipe.c

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/*
* Copyright (C) Igor Sysoev
*/
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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
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#include <ngx_event_pipe.h>
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static ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p);
static ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p);
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static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p);
static ngx_inline void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf);
static ngx_inline void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
ngx_buf_t *buf);
static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p);
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ngx_int_t ngx_event_pipe(ngx_event_pipe_t *p, int do_write)
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{
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u_int flags;
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ngx_event_t *rev, *wev;
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for ( ;; ) {
if (do_write) {
p->log->action = "sending to client";
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if (ngx_event_pipe_write_to_downstream(p) == NGX_ABORT) {
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return NGX_ABORT;
}
}
p->read = 0;
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p->upstream_blocked = 0;
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p->log->action = "reading upstream";
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if (ngx_event_pipe_read_upstream(p) == NGX_ABORT) {
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return NGX_ABORT;
}
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if (!p->read && !p->upstream_blocked) {
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break;
}
do_write = 1;
}
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if (p->upstream->fd != -1) {
rev = p->upstream->read;
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flags = (rev->eof || rev->error) ? NGX_CLOSE_EVENT : 0;
if (ngx_handle_read_event(rev, flags) == NGX_ERROR) {
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return NGX_ABORT;
}
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if (rev->active) {
ngx_add_timer(rev, p->read_timeout);
}
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}
nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
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if (p->downstream->fd != -1 && p->downstream->data == p->output_ctx) {
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wev = p->downstream->write;
if (ngx_handle_write_event(wev, p->send_lowat) == NGX_ERROR) {
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return NGX_ABORT;
}
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nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
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if (wev->active && !wev->ready && !wev->delayed) {
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ngx_add_timer(wev, p->send_timeout);
}
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}
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return NGX_OK;
}
static ngx_int_t ngx_event_pipe_read_upstream(ngx_event_pipe_t *p)
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{
ssize_t n, size;
ngx_int_t rc;
ngx_buf_t *b;
ngx_chain_t *chain, *cl, *ln;
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if (p->upstream_eof || p->upstream_error || p->upstream_done) {
return NGX_OK;
}
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe read upstream: %d", p->upstream->read->ready);
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for ( ;; ) {
if (p->upstream_eof || p->upstream_error || p->upstream_done) {
break;
}
if (p->preread_bufs == NULL && !p->upstream->read->ready) {
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break;
}
if (p->preread_bufs) {
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/* use the pre-read bufs if they exist */
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chain = p->preread_bufs;
p->preread_bufs = NULL;
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n = p->preread_size;
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe preread: %z", n);
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if (n) {
p->read = 1;
}
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} else {
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/*
* kqueue notifies about the end of file or a pending error.
* This test allows not to allocate a buf on these conditions
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* and not to call ngx_recv_chain().
*/
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if (p->upstream->read->available == 0
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&& p->upstream->read->pending_eof)
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{
p->upstream->read->ready = 0;
p->upstream->read->eof = 0;
p->upstream_eof = 1;
p->read = 1;
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#if (NGX_HAVE_KQUEUE)
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if (p->upstream->read->kq_errno) {
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p->upstream->read->error = 1;
p->upstream_error = 1;
p->upstream_eof = 0;
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ngx_log_error(NGX_LOG_ERR, p->log,
p->upstream->read->kq_errno,
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"readv() failed");
}
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#endif
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break;
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}
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if (p->free_raw_bufs) {
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/* use the free bufs if they exist */
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chain = p->free_raw_bufs;
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if (p->single_buf) {
p->free_raw_bufs = p->free_raw_bufs->next;
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chain->next = NULL;
} else {
p->free_raw_bufs = NULL;
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}
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} else if (p->allocated < p->bufs.num) {
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/* allocate a new buf if it's still allowed */
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b = ngx_create_temp_buf(p->pool, p->bufs.size);
if (b == NULL) {
return NGX_ABORT;
}
p->allocated++;
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chain = ngx_alloc_chain_link(p->pool);
if (chain == NULL) {
return NGX_ABORT;
}
chain->buf = b;
chain->next = NULL;
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nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
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} else if (!p->cachable
&& p->downstream->data == p->output_ctx
&& p->downstream->write->ready
&& !p->downstream->write->delayed)
nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
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{
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/*
* if the bufs are not needed to be saved in a cache and
* a downstream is ready then write the bufs to a downstream
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*/
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p->upstream_blocked = 1;
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe downstream ready");
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break;
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} else if (p->cachable
|| p->temp_file->offset < p->max_temp_file_size)
{
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/*
* if it is allowed, then save some bufs from r->in
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* to a temporary file, and add them to a r->out chain
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*/
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rc = ngx_event_pipe_write_chain_to_temp_file(p);
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe temp offset: %O", p->temp_file->offset);
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if (rc == NGX_BUSY) {
break;
}
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if (rc == NGX_AGAIN) {
if (ngx_event_flags & NGX_USE_LEVEL_EVENT
&& p->upstream->read->active
&& p->upstream->read->ready)
{
if (ngx_del_event(p->upstream->read, NGX_READ_EVENT, 0)
== NGX_ERROR)
{
return NGX_ABORT;
}
}
}
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if (rc != NGX_OK) {
return rc;
}
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chain = p->free_raw_bufs;
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if (p->single_buf) {
p->free_raw_bufs = p->free_raw_bufs->next;
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chain->next = NULL;
} else {
p->free_raw_bufs = NULL;
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}
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} else {
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/* there are no bufs to read in */
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ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
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"no pipe bufs to read in");
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break;
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}
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n = ngx_recv_chain(p->upstream, chain);
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe recv chain: %z", n);
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if (p->free_raw_bufs) {
chain->next = p->free_raw_bufs;
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}
p->free_raw_bufs = chain;
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if (n == NGX_ERROR) {
p->upstream_error = 1;
return NGX_ERROR;
}
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if (n == NGX_AGAIN) {
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if (p->single_buf) {
ngx_event_pipe_remove_shadow_links(chain->buf);
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}
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break;
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}
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p->read = 1;
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if (n == 0) {
p->upstream_eof = 1;
break;
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}
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}
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p->read_length += n;
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cl = chain;
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while (cl && n > 0) {
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ngx_event_pipe_remove_shadow_links(cl->buf);
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size = cl->buf->end - cl->buf->last;
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if (n >= size) {
cl->buf->last = cl->buf->end;
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/* STUB */ cl->buf->num = p->num++;
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if (p->input_filter(p, cl->buf) == NGX_ERROR) {
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return NGX_ABORT;
}
n -= size;
ln = cl;
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cl = cl->next;
ngx_free_chain(p->pool, ln);
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} else {
cl->buf->last += n;
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n = 0;
}
}
p->free_raw_bufs = cl;
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}
#if (NGX_DEBUG)
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for (cl = p->busy; cl; cl = cl->next) {
ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe buf busy s:%d t:%d f:%d "
"%p, pos %p, size: %z "
"file: %O, size: %z",
(cl->buf->shadow ? 1 : 0),
cl->buf->temporary, cl->buf->in_file,
cl->buf->start, cl->buf->pos,
cl->buf->last - cl->buf->pos,
cl->buf->file_pos,
cl->buf->file_last - cl->buf->file_pos);
2004-04-02 13:14:40 +08:00
}
for (cl = p->out; cl; cl = cl->next) {
ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe buf out s:%d t:%d f:%d "
"%p, pos %p, size: %z "
"file: %O, size: %z",
(cl->buf->shadow ? 1 : 0),
cl->buf->temporary, cl->buf->in_file,
cl->buf->start, cl->buf->pos,
cl->buf->last - cl->buf->pos,
cl->buf->file_pos,
cl->buf->file_last - cl->buf->file_pos);
}
for (cl = p->in; cl; cl = cl->next) {
ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe buf in s:%d t:%d f:%d "
"%p, pos %p, size: %z "
"file: %O, size: %z",
(cl->buf->shadow ? 1 : 0),
cl->buf->temporary, cl->buf->in_file,
cl->buf->start, cl->buf->pos,
cl->buf->last - cl->buf->pos,
cl->buf->file_pos,
cl->buf->file_last - cl->buf->file_pos);
2004-04-02 13:14:40 +08:00
}
for (cl = p->free_raw_bufs; cl; cl = cl->next) {
ngx_log_debug8(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe buf free s:%d t:%d f:%d "
"%p, pos %p, size: %z "
"file: %O, size: %z",
(cl->buf->shadow ? 1 : 0),
cl->buf->temporary, cl->buf->in_file,
cl->buf->start, cl->buf->pos,
cl->buf->last - cl->buf->pos,
cl->buf->file_pos,
cl->buf->file_last - cl->buf->file_pos);
2004-04-02 13:14:40 +08:00
}
#endif
if ((p->upstream_eof || p->upstream_error) && p->free_raw_bufs) {
2004-03-19 13:25:53 +08:00
/* STUB */ p->free_raw_bufs->buf->num = p->num++;
2004-03-19 13:25:53 +08:00
if (p->input_filter(p, p->free_raw_bufs->buf) == NGX_ERROR) {
2003-10-17 04:19:16 +08:00
return NGX_ABORT;
2003-04-15 01:04:58 +08:00
}
p->free_raw_bufs = p->free_raw_bufs->next;
2003-10-30 16:51:06 +08:00
2003-10-31 15:10:36 +08:00
if (p->free_bufs) {
for (cl = p->free_raw_bufs; cl; cl = cl->next) {
if (cl->buf->shadow == NULL) {
ngx_pfree(p->pool, cl->buf->start);
}
2003-10-31 15:10:36 +08:00
}
2003-10-30 16:51:06 +08:00
}
2003-04-15 01:04:58 +08:00
}
2003-10-20 03:57:23 +08:00
if (p->cachable && p->in) {
2003-10-22 00:49:56 +08:00
if (ngx_event_pipe_write_chain_to_temp_file(p) == NGX_ABORT) {
2003-10-10 23:10:50 +08:00
return NGX_ABORT;
2003-04-15 01:04:58 +08:00
}
}
2003-10-17 04:19:16 +08:00
return NGX_OK;
2003-04-15 01:04:58 +08:00
}
static ngx_int_t ngx_event_pipe_write_to_downstream(ngx_event_pipe_t *p)
2003-10-14 13:26:00 +08:00
{
size_t bsize;
2004-04-02 13:14:40 +08:00
ngx_uint_t flush;
ngx_chain_t *out, **ll, *cl;
2003-10-14 13:26:00 +08:00
2004-02-12 01:08:49 +08:00
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe write downstream: %d", p->downstream->write->ready);
2003-10-20 03:57:23 +08:00
for ( ;; ) {
2003-10-21 15:47:21 +08:00
if (p->downstream_error) {
2003-10-23 00:38:26 +08:00
return ngx_event_pipe_drain_chains(p);
2003-10-21 15:47:21 +08:00
}
2003-10-20 03:57:23 +08:00
2004-03-19 13:25:53 +08:00
if (p->upstream_eof || p->upstream_error || p->upstream_done) {
/* pass the p->out and p->in chains to the output filter */
nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
2005-05-12 22:58:06 +08:00
for (cl = p->busy; cl; cl = cl->next) {
cl->buf->recycled = 0;
}
2004-03-19 13:25:53 +08:00
if (p->out) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe write downstream flush out");
nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
2005-05-12 22:58:06 +08:00
for (cl = p->out; cl; cl = cl->next) {
cl->buf->recycled = 0;
}
2004-03-19 13:25:53 +08:00
if (p->output_filter(p->output_ctx, p->out) == NGX_ERROR) {
p->downstream_error = 1;
return ngx_event_pipe_drain_chains(p);
}
p->out = NULL;
}
if (p->in) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe write downstream flush in");
nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
2005-05-12 22:58:06 +08:00
for (cl = p->in; cl; cl = cl->next) {
cl->buf->recycled = 0;
}
2004-03-19 13:25:53 +08:00
if (p->output_filter(p->output_ctx, p->in) == NGX_ERROR) {
p->downstream_error = 1;
return ngx_event_pipe_drain_chains(p);
}
p->in = NULL;
}
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe write downstream done");
/* TODO: free unused bufs */
2004-03-19 13:25:53 +08:00
2003-10-20 03:57:23 +08:00
p->downstream_done = 1;
break;
}
nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
2005-05-12 22:58:06 +08:00
if (p->downstream->data != p->output_ctx
|| !p->downstream->write->ready
|| p->downstream->write->delayed)
nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
2005-05-12 22:58:06 +08:00
{
2003-10-20 03:57:23 +08:00
break;
}
2003-10-14 13:26:00 +08:00
/* bsize is the size of the busy recycled bufs */
2003-10-23 00:38:26 +08:00
bsize = 0;
2003-10-21 15:47:21 +08:00
2004-04-02 13:14:40 +08:00
for (cl = p->busy; cl; cl = cl->next) {
if (cl->buf->recycled) {
bsize += cl->buf->end - cl->buf->start;
}
2003-10-21 15:47:21 +08:00
}
2004-04-02 13:14:40 +08:00
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe write busy: %uz", bsize);
2003-10-21 15:47:21 +08:00
2003-10-22 00:49:56 +08:00
out = NULL;
2003-10-23 00:38:26 +08:00
ll = NULL;
2004-04-02 13:14:40 +08:00
flush = 0;
2003-10-21 15:47:21 +08:00
2003-10-22 00:49:56 +08:00
for ( ;; ) {
if (p->out) {
2003-10-23 00:38:26 +08:00
cl = p->out;
2003-10-14 23:06:38 +08:00
if (cl->buf->recycled
&& bsize + cl->buf->last - cl->buf->pos > p->busy_size)
{
2004-04-02 13:14:40 +08:00
flush = 1;
2004-03-23 14:01:52 +08:00
break;
}
2003-10-14 23:06:38 +08:00
2003-10-22 00:49:56 +08:00
p->out = p->out->next;
ngx_event_pipe_free_shadow_raw_buf(&p->free_raw_bufs, cl->buf);
2003-10-14 13:26:00 +08:00
2003-10-22 00:49:56 +08:00
} else if (!p->cachable && p->in) {
2003-10-23 00:38:26 +08:00
cl = p->in;
2003-10-14 23:06:38 +08:00
if (cl->buf->recycled
&& bsize + cl->buf->last - cl->buf->pos > p->busy_size)
{
2004-04-02 13:14:40 +08:00
flush = 1;
2004-03-23 14:01:52 +08:00
break;
}
2003-10-22 00:49:56 +08:00
p->in = p->in->next;
} else {
2003-10-14 23:06:38 +08:00
break;
}
if (cl->buf->recycled) {
bsize += cl->buf->last - cl->buf->pos;
}
2003-10-23 00:38:26 +08:00
cl->next = NULL;
if (out) {
*ll = cl;
} else {
out = cl;
}
ll = &cl->next;
2003-10-22 00:49:56 +08:00
}
2003-10-14 13:26:00 +08:00
2004-04-02 13:14:40 +08:00
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe write: out:%p, f:%d", out, flush);
2003-10-22 15:05:29 +08:00
2004-04-02 13:14:40 +08:00
if (out == NULL && !flush) {
break;
2003-10-14 13:26:00 +08:00
}
2003-10-22 00:49:56 +08:00
if (p->output_filter(p->output_ctx, out) == NGX_ERROR) {
2003-10-21 01:14:07 +08:00
p->downstream_error = 1;
2004-03-19 13:25:53 +08:00
return ngx_event_pipe_drain_chains(p);
2003-10-20 03:57:23 +08:00
}
2003-10-22 15:05:29 +08:00
ngx_chain_update_chains(&p->free, &p->busy, &out, p->tag);
2003-10-14 23:06:38 +08:00
2003-10-23 00:38:26 +08:00
for (cl = p->free; cl; cl = cl->next) {
2003-10-22 15:05:29 +08:00
if (cl->buf->temp_file) {
2003-11-06 01:03:41 +08:00
if (p->cachable || !p->cyclic_temp_file) {
continue;
}
/* reset p->temp_offset if all bufs had been sent */
2003-11-06 01:03:41 +08:00
if (cl->buf->file_last == p->temp_file->offset) {
2003-11-06 01:03:41 +08:00
p->temp_file->offset = 0;
}
}
/* TODO: free buf if p->free_bufs && upstream done */
/* add the free shadow raw buf to p->free_raw_bufs */
2003-10-22 15:05:29 +08:00
if (cl->buf->last_shadow) {
if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
return NGX_ABORT;
}
2003-10-14 13:26:00 +08:00
cl->buf->last_shadow = 0;
2003-10-14 13:26:00 +08:00
}
2003-10-22 15:05:29 +08:00
cl->buf->shadow = NULL;
2003-10-14 13:26:00 +08:00
}
}
return NGX_OK;
}
static ngx_int_t ngx_event_pipe_write_chain_to_temp_file(ngx_event_pipe_t *p)
2003-04-15 01:04:58 +08:00
{
2004-06-18 14:09:25 +08:00
ssize_t size, bsize;
ngx_buf_t *b;
2003-11-18 00:15:03 +08:00
ngx_chain_t *cl, *tl, *next, *out, **ll, **last_free, fl;
2003-04-15 01:04:58 +08:00
if (p->buf_to_file) {
fl.buf = p->buf_to_file;
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fl.next = p->in;
out = &fl;
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} else {
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out = p->in;
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}
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if (!p->cachable) {
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size = 0;
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cl = out;
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ll = NULL;
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe offset: %O", p->temp_file->offset);
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do {
bsize = cl->buf->last - cl->buf->pos;
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ngx_log_debug3(NGX_LOG_DEBUG_EVENT, p->log, 0,
"pipe buf %p, pos %p, size: %z",
cl->buf->start, cl->buf->pos, bsize);
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if ((size + bsize > p->temp_file_write_size)
|| (p->temp_file->offset + size + bsize > p->max_temp_file_size))
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{
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break;
}
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size += bsize;
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ll = &cl->next;
cl = cl->next;
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} while (cl);
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "size: %z", size);
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if (ll == NULL) {
return NGX_BUSY;
}
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if (cl) {
p->in = cl;
*ll = NULL;
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} else {
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p->in = NULL;
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p->last_in = &p->in;
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}
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} else {
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p->in = NULL;
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p->last_in = &p->in;
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}
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if (ngx_write_chain_to_temp_file(p->temp_file, out) == NGX_ERROR) {
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return NGX_ABORT;
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}
for (last_free = &p->free_raw_bufs;
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*last_free != NULL;
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last_free = &(*last_free)->next)
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{
/* void */
}
if (p->buf_to_file) {
p->temp_file->offset = p->buf_to_file->last - p->buf_to_file->pos;
p->buf_to_file = NULL;
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out = out->next;
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}
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for (cl = out; cl; cl = next) {
next = cl->next;
cl->next = NULL;
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b = cl->buf;
b->file = &p->temp_file->file;
b->file_pos = p->temp_file->offset;
p->temp_file->offset += b->last - b->pos;
b->file_last = p->temp_file->offset;
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b->in_file = 1;
b->temp_file = 1;
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if (p->out) {
*p->last_out = cl;
} else {
p->out = cl;
}
p->last_out = &cl->next;
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if (b->last_shadow) {
tl = ngx_alloc_chain_link(p->pool);
if (tl == NULL) {
return NGX_ABORT;
}
tl->buf = b->shadow;
tl->next = NULL;
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*last_free = tl;
last_free = &tl->next;
b->shadow->pos = b->shadow->start;
b->shadow->last = b->shadow->start;
ngx_event_pipe_remove_shadow_links(b->shadow);
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}
}
return NGX_OK;
}
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/* the copy input filter */
ngx_int_t ngx_event_pipe_copy_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
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{
ngx_buf_t *b;
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ngx_chain_t *cl;
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if (buf->pos == buf->last) {
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return NGX_OK;
}
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if (p->free) {
cl = p->free;
b = cl->buf;
p->free = cl->next;
ngx_free_chain(p->pool, cl);
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} else {
b = ngx_alloc_buf(p->pool);
if (b == NULL) {
return NGX_ERROR;
}
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}
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ngx_memcpy(b, buf, sizeof(ngx_buf_t));
b->shadow = buf;
b->tag = p->tag;
b->last_shadow = 1;
b->recycled = 1;
buf->shadow = b;
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cl = ngx_alloc_chain_link(p->pool);
if (cl == NULL) {
return NGX_ERROR;
}
cl->buf = b;
cl->next = NULL;
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ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "input buf #%d", b->num);
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if (p->in) {
*p->last_in = cl;
} else {
p->in = cl;
}
p->last_in = &cl->next;
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return NGX_OK;
}
static ngx_inline void ngx_event_pipe_remove_shadow_links(ngx_buf_t *buf)
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{
ngx_buf_t *b, *next;
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b = buf->shadow;
if (b == NULL) {
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return;
}
while (!b->last_shadow) {
next = b->shadow;
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b->temporary = 0;
b->recycled = 0;
b->shadow = NULL;
b = next;
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}
b->temporary = 0;
b->recycled = 0;
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b->last_shadow = 0;
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b->shadow = NULL;
buf->shadow = NULL;
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}
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static ngx_inline void ngx_event_pipe_free_shadow_raw_buf(ngx_chain_t **free,
ngx_buf_t *buf)
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{
ngx_buf_t *s;
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ngx_chain_t *cl, **ll;
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if (buf->shadow == NULL) {
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return;
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}
for (s = buf->shadow; !s->last_shadow; s = s->shadow) { /* void */ }
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ll = free;
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for (cl = *free ; cl; cl = cl->next) {
if (cl->buf == s) {
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*ll = cl->next;
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break;
}
if (cl->buf->shadow) {
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break;
}
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ll = &cl->next;
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}
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}
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ngx_int_t ngx_event_pipe_add_free_buf(ngx_event_pipe_t *p, ngx_buf_t *b)
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{
ngx_chain_t *cl;
cl = ngx_alloc_chain_link(p->pool);
if (cl == NULL) {
return NGX_ERROR;
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}
b->pos = b->start;
b->last = b->start;
b->shadow = NULL;
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cl->buf = b;
if (p->free_raw_bufs == NULL) {
p->free_raw_bufs = cl;
cl->next = NULL;
return NGX_OK;
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}
if (p->free_raw_bufs->buf->pos == p->free_raw_bufs->buf->last) {
/* add the free buf to the list start */
cl->next = p->free_raw_bufs;
p->free_raw_bufs = cl;
return NGX_OK;
}
/* the first free buf is partialy filled, thus add the free buf after it */
cl->next = p->free_raw_bufs->next;
p->free_raw_bufs->next = cl;
return NGX_OK;
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}
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static ngx_int_t ngx_event_pipe_drain_chains(ngx_event_pipe_t *p)
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{
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ngx_chain_t *cl, *tl;
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for ( ;; ) {
if (p->busy) {
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cl = p->busy;
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p->busy = NULL;
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} else if (p->out) {
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cl = p->out;
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p->out = NULL;
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} else if (p->in) {
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cl = p->in;
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p->in = NULL;
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} else {
return NGX_OK;
}
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while (cl) {
if (cl->buf->last_shadow) {
if (ngx_event_pipe_add_free_buf(p, cl->buf->shadow) != NGX_OK) {
return NGX_ABORT;
}
cl->buf->last_shadow = 0;
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}
cl->buf->shadow = NULL;
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tl = cl->next;
cl->next = p->free;
p->free = cl;
cl = tl;
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}
}
}