Mercurial > hg > nginx-mail
view src/http/ngx_http_postpone_filter_module.c @ 183:f4b38f37ca5b
Added tag NGINX_0_3_38 for changeset 13710a1813ad
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Fri, 14 Apr 2006 00:00:00 +0400 |
parents | 36af50a5582d |
children | 3689cd4e3228 |
line wrap: on
line source
/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> static ngx_int_t ngx_http_postpone_filter_output_postponed_request(ngx_http_request_t *r); static ngx_int_t ngx_http_postpone_filter_init(ngx_cycle_t *cycle); static ngx_http_module_t ngx_http_postpone_filter_module_ctx = { NULL, /* preconfiguration */ NULL, /* postconfiguration */ 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_postpone_filter_module = { NGX_MODULE_V1, &ngx_http_postpone_filter_module_ctx, /* module context */ NULL, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ ngx_http_postpone_filter_init, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_http_output_body_filter_pt ngx_http_next_filter; static ngx_int_t ngx_http_postpone_filter(ngx_http_request_t *r, ngx_chain_t *in) { ngx_int_t rc; ngx_chain_t *out; ngx_http_postponed_request_t *pr, **ppr; ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http postpone filter \"%V?%V\" %p", &r->uri, &r->args, in); if (r != r->connection->data || (r->postponed && in)) { if (r->postponed) { for (pr = r->postponed; pr->next; pr = pr->next) { /* void */ } ppr = pr->request ? &pr->next : NULL; } else { ppr = &r->postponed; #if (NGX_SUPPRESS_WARN) pr = NULL; #endif } if (ppr) { pr = ngx_palloc(r->pool, sizeof(ngx_http_postponed_request_t)); if (pr == NULL) { return NGX_ERROR; } *ppr = pr; pr->request = NULL; pr->out = NULL; pr->next = NULL; } if (ngx_chain_add_copy(r->pool, &pr->out, in) == NGX_ERROR) { return NGX_ERROR; } if (r != r->connection->data || r->postponed->request) { return NGX_AGAIN; } } if (r->postponed) { out = r->postponed->out; if (out) { r->postponed = r->postponed->next; } } else { out = in; } rc = NGX_OK; if (out || (r->connection->buffered & (NGX_HTTP_LOWLEVEL_BUFFERED|NGX_LOWLEVEL_BUFFERED))) { ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http postpone filter out \"%V?%V\"", &r->uri, &r->args); if (!(out && out->next == NULL && ngx_buf_sync_only(out->buf))) { rc = ngx_http_next_filter(r->main, out); if (rc == NGX_ERROR) { /* NGX_ERROR may be returned by any filter */ r->connection->error = 1; } } } if (r->postponed == NULL) { return rc; } rc = ngx_http_postpone_filter_output_postponed_request(r); if (rc == NGX_ERROR) { /* NGX_ERROR may be returned by any filter */ r->connection->error = 1; } return rc; } static ngx_int_t ngx_http_postpone_filter_output_postponed_request(ngx_http_request_t *r) { ngx_int_t rc; ngx_chain_t *out; ngx_http_postponed_request_t *pr; for ( ;; ) { pr = r->postponed; if (pr == NULL) { return NGX_OK; } if (pr->request) { ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http postpone filter handle \"%V?%V\"", &pr->request->uri, &pr->request->args); if (!pr->request->done) { r->connection->data = pr->request; return NGX_AGAIN; } rc = ngx_http_postpone_filter_output_postponed_request(pr->request); if (rc == NGX_AGAIN || rc == NGX_ERROR) { return rc; } r->postponed = r->postponed->next; pr = r->postponed; } if (pr == NULL) { return NGX_OK; } out = pr->out; if (out) { ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http postpone filter out postponed \"%V?%V\"", &r->uri, &r->args); if (!(out && out->next == NULL && ngx_buf_sync_only(out->buf))) { if (ngx_http_next_filter(r->main, out) == NGX_ERROR) { return NGX_ERROR; } } } r->postponed = r->postponed->next; } } static ngx_int_t ngx_http_postpone_filter_init(ngx_cycle_t *cycle) { ngx_http_next_filter = ngx_http_top_body_filter; ngx_http_top_body_filter = ngx_http_postpone_filter; return NGX_OK; }