Mercurial > hg > nginx-vendor-0-7
diff src/http/ngx_http_write_filter_module.c @ 50:72eb30262aac NGINX_0_1_25
nginx 0.1.25
*) Bugfix: nginx did run on Linux parisc.
*) Feature: nginx now does not start under FreeBSD if the sysctl
kern.ipc.somaxconn value is too big.
*) Bugfix: if a request was internally redirected by the
ngx_http_index_module module to the ngx_http_proxy_module or
ngx_http_fastcgi_module modules, then the index file was not closed
after request completion.
*) Feature: the "proxy_pass" can be used in location with regular
expression.
*) Feature: the ngx_http_rewrite_filter_module module supports the
condition like "if ($HTTP_USER_AGENT ~ MSIE)".
*) Bugfix: nginx started too slow if the large number of addresses and
text values were used in the "geo" directive.
*) Change: a variable name must be declared as "$name" in the "geo"
directive. The previous variant without "$" is still supported, but
will be removed soon.
*) Feature: the "%{VARIABLE}v" logging parameter.
*) Feature: the "set $name value" directive.
*) Bugfix: gcc 4.0 compatibility.
*) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Sat, 19 Mar 2005 00:00:00 +0300 |
parents | |
children | 3050baa54a26 |
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new file mode 100644 --- /dev/null +++ b/src/http/ngx_http_write_filter_module.c @@ -0,0 +1,250 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_http.h> + + +typedef struct { + ngx_chain_t *out; +} ngx_http_write_filter_ctx_t; + + +static ngx_int_t ngx_http_write_filter_init(ngx_cycle_t *cycle); + + +ngx_http_module_t ngx_http_write_filter_module_ctx = { + NULL, /* pre conf */ + + NULL, /* create main configuration */ + NULL, /* init main configuration */ + + NULL, /* create server configuration */ + NULL, /* merge server configuration */ + + NULL, /* create location configuration */ + NULL, /* merge location configuration */ +}; + + +ngx_module_t ngx_http_write_filter_module = { + NGX_MODULE, + &ngx_http_write_filter_module_ctx, /* module context */ + NULL, /* module directives */ + NGX_HTTP_MODULE, /* module type */ + ngx_http_write_filter_init, /* init module */ + NULL /* init process */ +}; + + +ngx_int_t +ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + off_t size, sent; + ngx_uint_t last, flush; + ngx_chain_t *cl, *ln, **ll, *chain; + ngx_connection_t *c; + ngx_http_core_loc_conf_t *clcf; + ngx_http_write_filter_ctx_t *ctx; + + ctx = ngx_http_get_module_ctx(r->main ? r->main : r, + ngx_http_write_filter_module); + + if (ctx == NULL) { + + ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_write_filter_ctx_t)); + if (ctx == NULL) { + return NGX_ERROR; + } + + ngx_http_set_ctx(r, ctx, ngx_http_write_filter_module); + } + + size = 0; + flush = 0; + last = 0; + ll = &ctx->out; + + /* find the size, the flush point and the last link of the saved chain */ + + for (cl = ctx->out; cl; cl = cl->next) { + ll = &cl->next; + + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, + "write old buf t:%d f:%d %p, pos %p, size: %z " + "file: %O, size: %z", + 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); + +#if 1 + if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { + ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, + "zero size buf in writer " + "t:%d r:%d f:%d %p %p-%p %p %O-%O", + cl->buf->temporary, + cl->buf->recycled, + cl->buf->in_file, + cl->buf->start, + cl->buf->pos, + cl->buf->last, + cl->buf->file, + cl->buf->file_pos, + cl->buf->file_last); + + ngx_debug_point(); + return NGX_ERROR; + } +#endif + + size += ngx_buf_size(cl->buf); + + if (cl->buf->flush || cl->buf->recycled) { + flush = 1; + } + + if (cl->buf->last_buf) { + last = 1; + } + } + + /* add the new chain to the existent one */ + + for (ln = in; ln; ln = ln->next) { + cl = ngx_alloc_chain_link(r->pool); + if (cl == NULL) { + return NGX_ERROR; + } + + cl->buf = ln->buf; + *ll = cl; + ll = &cl->next; + + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, r->connection->log, 0, + "write new buf t:%d f:%d %p, pos %p, size: %z " + "file: %O, size: %z", + 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); + +#if 1 + if (ngx_buf_size(cl->buf) == 0 && !ngx_buf_special(cl->buf)) { + ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, + "zero size buf in writer " + "t:%d r:%d f:%d %p %p-%p %p %O-%O", + cl->buf->temporary, + cl->buf->recycled, + cl->buf->in_file, + cl->buf->start, + cl->buf->pos, + cl->buf->last, + cl->buf->file, + cl->buf->file_pos, + cl->buf->file_last); + + ngx_debug_point(); + return NGX_ERROR; + } +#endif + + size += ngx_buf_size(cl->buf); + + if (cl->buf->flush || cl->buf->recycled) { + flush = 1; + } + + if (cl->buf->last_buf) { + last = 1; + } + } + + *ll = NULL; + + c = r->connection; + + ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http write filter: l:%d f:%d s:%O", last, flush, size); + + clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, + ngx_http_core_module); + + /* + * avoid the output if there is no last buf, no flush point, + * there are the incoming bufs and the size of all bufs + * is smaller than "postpone_output" directive + */ + + if (!last && !flush && in && size < (off_t) clcf->postpone_output) { + return NGX_OK; + } + + if (c->write->delayed) { + return NGX_AGAIN; + } + + if (size == 0 && !c->buffered) { + if (last) { + return NGX_OK; + } + + if (flush) { + do { + ctx->out = ctx->out->next; + } + while (ctx->out); + + return NGX_OK; + } + + ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, + "the http output chain is empty"); + + ngx_debug_point(); + + return NGX_ERROR; + } + + sent = c->sent; + + chain = c->send_chain(c, ctx->out, clcf->limit_rate); + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http write filter %p", chain); + + if (clcf->limit_rate) { + sent = c->sent - sent; + c->write->delayed = 1; + ngx_add_timer(r->connection->write, + (ngx_msec_t) (sent * 1000 / clcf->limit_rate)); + } + + if (chain == NGX_CHAIN_ERROR) { + return NGX_ERROR; + } + + ctx->out = chain; + + if (chain || (last && c->buffered)) { + return NGX_AGAIN; + } + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_write_filter_init(ngx_cycle_t *cycle) +{ + ngx_http_top_body_filter = ngx_http_write_filter; + + return NGX_OK; +}