Mercurial > hg > nginx-vendor-0-5
view src/http/ngx_http_write_filter.c @ 1:80bdda0151b0
Added tag NGINX_0_1_0 for changeset f0b350454894
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | f0b350454894 |
children | 4b2dafa26fe2 |
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/* * 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) { int last; off_t size, flush, sent; 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) { ngx_http_create_ctx(r, ctx, ngx_http_write_filter_module, sizeof(ngx_http_write_filter_ctx_t), NGX_ERROR); } 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; size += ngx_buf_size(cl->buf); if (cl->buf->flush || cl->buf->recycled) { flush = size; } if (cl->buf->last_buf) { last = 1; } } /* add the new chain to the existent one */ for (ln = in; ln; ln = ln->next) { ngx_alloc_link_and_set_buf(cl, ln->buf, r->pool, NGX_ERROR); *ll = cl; ll = &cl->next; size += ngx_buf_size(cl->buf); if (cl->buf->flush || cl->buf->recycled) { flush = size; } if (cl->buf->last_buf) { last = 1; } } c = r->connection; ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, "http write filter: l:%d f:" OFF_T_FMT " s:" OFF_T_FMT, 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 == 0 && in && size < (off_t) clcf->postpone_output) { return NGX_OK; } if (c->write->delayed) { return NGX_AGAIN; } if (size == 0 && !c->buffered) { if (!last) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, "the http output chain is empty"); } return NGX_OK; } sent = c->sent; chain = c->send_chain(c, ctx->out, clcf->limit_rate ? clcf->limit_rate: OFF_T_MAX_VALUE); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http write filter %X", 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 || 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; }