Mercurial > hg > nginx
view src/http/ngx_http_postpone_filter_module.c @ 2322:d4df1c875351 stable-0.6
r2183, r2192 merge:
*) allow file existence test for POST requests in static module
*) do not discard body while error_page redirection
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 20 Nov 2008 17:07:22 +0000 |
parents | 744ae0917c7a |
children | 173900227c06 |
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/* * 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_conf_t *cf); static ngx_http_module_t ngx_http_postpone_filter_module_ctx = { NULL, /* preconfiguration */ ngx_http_postpone_filter_init, /* 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 */ NULL, /* 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 1 { ngx_chain_t *cl; ngx_buf_t *b = NULL; for (cl = pr->out; cl; cl = cl->next) { if (cl->buf == b) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, "the same buf was used in postponed %p %p", b, b->pos); ngx_debug_point(); return NGX_ERROR; } b = cl->buf; } } #endif 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_log_ctx_t *ctx; ngx_http_postponed_request_t *pr; for ( ;; ) { pr = r->postponed; if (pr == NULL) { break; } 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); ctx = r->connection->log->data; ctx->current_request = pr->request; 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) { break; } 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; } if (r->out) { ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http postpone filter out again \"%V?%V\"", &r->uri, &r->args); r->connection->data = r; return NGX_AGAIN; } return NGX_OK; } static ngx_int_t ngx_http_postpone_filter_init(ngx_conf_t *cf) { ngx_http_next_filter = ngx_http_top_body_filter; ngx_http_top_body_filter = ngx_http_postpone_filter; return NGX_OK; }