Mercurial > hg > nginx
view src/http/ngx_http_write_filter.c @ 153:c71aeb75c071
nginx-0.0.1-2003-10-21-20:49:56 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 21 Oct 2003 16:49:56 +0000 |
parents | ef8c87afcfc5 |
children | eac26585476e |
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#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 void *ngx_http_write_filter_create_conf(ngx_conf_t *cf); static char *ngx_http_write_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child); static int ngx_http_write_filter_init(ngx_cycle_t *cycle); static ngx_command_t ngx_http_write_filter_commands[] = { {ngx_string("sendfile"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_write_filter_conf_t, sendfile), NULL}, {ngx_string("buffer_output"), NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_write_filter_conf_t, buffer_output), NULL}, ngx_null_command }; ngx_http_module_t ngx_http_write_filter_module_ctx = { NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_write_filter_create_conf, /* create location configuration */ ngx_http_write_filter_merge_conf /* merge location configuration */ }; ngx_module_t ngx_http_write_filter_module = { NGX_MODULE, &ngx_http_write_filter_module_ctx, /* module context */ ngx_http_write_filter_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ ngx_http_write_filter_init, /* init module */ NULL /* init child */ }; int ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in) { int last; off_t size, flush; ngx_chain_t *ce, **le, *chain; ngx_http_write_filter_ctx_t *ctx; ngx_http_write_filter_conf_t *conf; 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 = flush = 0; last = 0; le = &ctx->out; /* find the size, the flush point and the last entry of the saved chain */ for (ce = ctx->out; ce; ce = ce->next) { le = &ce->next; size += ngx_hunk_size(ce->hunk); if (ce->hunk->type & (NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED)) { flush = size; } if (ce->hunk->type & NGX_HUNK_LAST) { last = 1; } } conf = ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_write_filter_module); /* add the new chain to the existent one */ for (/* void */; in; in = in->next) { ngx_test_null(ce, ngx_alloc_chain_entry(r->pool), NGX_ERROR); ce->hunk = in->hunk; ce->next = NULL; *le = ce; le = &ce->next; if (!(ngx_io.flags & NGX_IO_SENDFILE) || !conf->sendfile) { ce->hunk->type &= ~NGX_HUNK_FILE; } size += ngx_hunk_size(ce->hunk); if (ce->hunk->type & (NGX_HUNK_FLUSH|NGX_HUNK_RECYCLED)) { flush = size; } if (ce->hunk->type & NGX_HUNK_LAST) { last = 1; } } #if (NGX_DEBUG_WRITE_FILTER) ngx_log_debug(r->connection->log, "write filter: last:%d flush:%qd size:%qd" _ last _ flush _ size); #endif /* * avoid the output if there is no last hunk, no flush point and * size of the hunks is smaller then "buffer_output" */ if (!last && flush == 0 && size < conf->buffer_output) { return NGX_OK; } if (r->connection->write->delayed) { return NGX_AGAIN; } if (size == 0) { return NGX_OK; } chain = ngx_write_chain(r->connection, ctx->out); #if (NGX_DEBUG_WRITE_FILTER) ngx_log_debug(r->connection->log, "write filter %x" _ chain); #endif if (chain == NGX_CHAIN_ERROR) { return NGX_ERROR; } ctx->out = chain; if (chain == NULL) { return NGX_OK; } return NGX_AGAIN; } static void *ngx_http_write_filter_create_conf(ngx_conf_t *cf) { ngx_http_write_filter_conf_t *conf; ngx_test_null(conf, ngx_palloc(cf->pool, sizeof(ngx_http_write_filter_conf_t)), NULL); conf->buffer_output = NGX_CONF_UNSET; conf->sendfile = NGX_CONF_UNSET; return conf; } static char *ngx_http_write_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_write_filter_conf_t *prev = parent; ngx_http_write_filter_conf_t *conf = child; ngx_conf_merge_size_value(conf->buffer_output, prev->buffer_output, 1460); ngx_conf_merge_value(conf->sendfile, prev->sendfile, 0); return NULL; } static int ngx_http_write_filter_init(ngx_cycle_t *cycle) { ngx_http_top_body_filter = ngx_http_write_filter; return NGX_OK; }