| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| |
| typedef struct { |
| ngx_bufs_t bufs; |
| } ngx_http_copy_filter_conf_t; |
| |
| |
| #if (NGX_HAVE_FILE_AIO) |
| static void ngx_http_copy_aio_handler(ngx_output_chain_ctx_t *ctx, |
| ngx_file_t *file); |
| static void ngx_http_copy_aio_event_handler(ngx_event_t *ev); |
| #if (NGX_HAVE_AIO_SENDFILE) |
| static void ngx_http_copy_aio_sendfile_event_handler(ngx_event_t *ev); |
| #endif |
| #endif |
| |
| static void *ngx_http_copy_filter_create_conf(ngx_conf_t *cf); |
| static char *ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, |
| void *parent, void *child); |
| static ngx_int_t ngx_http_copy_filter_init(ngx_conf_t *cf); |
| |
| |
| static ngx_command_t ngx_http_copy_filter_commands[] = { |
| |
| { ngx_string("output_buffers"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
| ngx_conf_set_bufs_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_copy_filter_conf_t, bufs), |
| NULL }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_http_module_t ngx_http_copy_filter_module_ctx = { |
| NULL, /* preconfiguration */ |
| ngx_http_copy_filter_init, /* postconfiguration */ |
| |
| NULL, /* create main configuration */ |
| NULL, /* init main configuration */ |
| |
| NULL, /* create server configuration */ |
| NULL, /* merge server configuration */ |
| |
| ngx_http_copy_filter_create_conf, /* create location configuration */ |
| ngx_http_copy_filter_merge_conf /* merge location configuration */ |
| }; |
| |
| |
| ngx_module_t ngx_http_copy_filter_module = { |
| NGX_MODULE_V1, |
| &ngx_http_copy_filter_module_ctx, /* module context */ |
| ngx_http_copy_filter_commands, /* 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_body_filter; |
| |
| |
| static ngx_int_t |
| ngx_http_copy_filter(ngx_http_request_t *r, ngx_chain_t *in) |
| { |
| ngx_int_t rc; |
| ngx_connection_t *c; |
| ngx_output_chain_ctx_t *ctx; |
| ngx_http_core_loc_conf_t *clcf; |
| ngx_http_copy_filter_conf_t *conf; |
| |
| c = r->connection; |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http copy filter: \"%V?%V\"", &r->uri, &r->args); |
| |
| ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module); |
| |
| if (ctx == NULL) { |
| ctx = ngx_pcalloc(r->pool, sizeof(ngx_output_chain_ctx_t)); |
| if (ctx == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ngx_http_set_ctx(r, ctx, ngx_http_copy_filter_module); |
| |
| conf = ngx_http_get_module_loc_conf(r, ngx_http_copy_filter_module); |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| ctx->sendfile = c->sendfile; |
| ctx->need_in_memory = r->main_filter_need_in_memory |
| || r->filter_need_in_memory; |
| ctx->need_in_temp = r->filter_need_temporary; |
| |
| ctx->alignment = clcf->directio_alignment; |
| |
| ctx->pool = r->pool; |
| ctx->bufs = conf->bufs; |
| ctx->tag = (ngx_buf_tag_t) &ngx_http_copy_filter_module; |
| |
| ctx->output_filter = (ngx_output_chain_filter_pt) |
| ngx_http_next_body_filter; |
| ctx->filter_ctx = r; |
| |
| #if (NGX_HAVE_FILE_AIO) |
| if (ngx_file_aio) { |
| if (clcf->aio) { |
| ctx->aio_handler = ngx_http_copy_aio_handler; |
| } |
| #if (NGX_HAVE_AIO_SENDFILE) |
| c->aio_sendfile = (clcf->aio == NGX_HTTP_AIO_SENDFILE); |
| #endif |
| } |
| #endif |
| |
| if (in && in->buf && ngx_buf_size(in->buf)) { |
| r->request_output = 1; |
| } |
| } |
| |
| #if (NGX_HAVE_FILE_AIO) |
| ctx->aio = r->aio; |
| #endif |
| |
| for ( ;; ) { |
| rc = ngx_output_chain(ctx, in); |
| |
| if (ctx->in == NULL) { |
| r->buffered &= ~NGX_HTTP_COPY_BUFFERED; |
| |
| } else { |
| r->buffered |= NGX_HTTP_COPY_BUFFERED; |
| } |
| |
| ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http copy filter: %i \"%V?%V\"", rc, &r->uri, &r->args); |
| |
| #if (NGX_HAVE_FILE_AIO && NGX_HAVE_AIO_SENDFILE) |
| |
| if (c->busy_sendfile) { |
| ssize_t n; |
| off_t offset; |
| ngx_file_t *file; |
| ngx_http_ephemeral_t *e; |
| |
| if (r->aio) { |
| c->busy_sendfile = NULL; |
| return rc; |
| } |
| |
| file = c->busy_sendfile->file; |
| offset = c->busy_sendfile->file_pos; |
| |
| if (file->aio) { |
| c->busy_count = (offset == file->aio->last_offset) ? |
| c->busy_count + 1 : 0; |
| file->aio->last_offset = offset; |
| |
| if (c->busy_count > 2) { |
| ngx_log_error(NGX_LOG_ALERT, c->log, 0, |
| "sendfile(%V) returned busy again", |
| &file->name); |
| c->aio_sendfile = 0; |
| } |
| } |
| |
| c->busy_sendfile = NULL; |
| e = (ngx_http_ephemeral_t *) &r->uri_start; |
| |
| n = ngx_file_aio_read(file, &e->aio_preload, 1, offset, r->pool); |
| |
| if (n > 0) { |
| in = NULL; |
| continue; |
| } |
| |
| rc = n; |
| |
| if (rc == NGX_AGAIN) { |
| file->aio->data = r; |
| file->aio->handler = ngx_http_copy_aio_sendfile_event_handler; |
| |
| r->main->blocked++; |
| r->aio = 1; |
| } |
| } |
| #endif |
| |
| return rc; |
| } |
| } |
| |
| |
| #if (NGX_HAVE_FILE_AIO) |
| |
| static void |
| ngx_http_copy_aio_handler(ngx_output_chain_ctx_t *ctx, ngx_file_t *file) |
| { |
| ngx_http_request_t *r; |
| |
| r = ctx->filter_ctx; |
| |
| file->aio->data = r; |
| file->aio->handler = ngx_http_copy_aio_event_handler; |
| |
| r->main->blocked++; |
| r->aio = 1; |
| ctx->aio = 1; |
| } |
| |
| |
| static void |
| ngx_http_copy_aio_event_handler(ngx_event_t *ev) |
| { |
| ngx_event_aio_t *aio; |
| ngx_http_request_t *r; |
| |
| aio = ev->data; |
| r = aio->data; |
| |
| r->main->blocked--; |
| r->aio = 0; |
| |
| r->connection->write->handler(r->connection->write); |
| } |
| |
| |
| #if (NGX_HAVE_AIO_SENDFILE) |
| |
| static void |
| ngx_http_copy_aio_sendfile_event_handler(ngx_event_t *ev) |
| { |
| ngx_event_aio_t *aio; |
| ngx_http_request_t *r; |
| |
| aio = ev->data; |
| r = aio->data; |
| |
| r->main->blocked--; |
| r->aio = 0; |
| ev->complete = 0; |
| |
| r->connection->write->handler(r->connection->write); |
| } |
| |
| #endif |
| #endif |
| |
| |
| static void * |
| ngx_http_copy_filter_create_conf(ngx_conf_t *cf) |
| { |
| ngx_http_copy_filter_conf_t *conf; |
| |
| conf = ngx_palloc(cf->pool, sizeof(ngx_http_copy_filter_conf_t)); |
| if (conf == NULL) { |
| return NULL; |
| } |
| |
| conf->bufs.num = 0; |
| |
| return conf; |
| } |
| |
| |
| static char * |
| ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
| { |
| ngx_http_copy_filter_conf_t *prev = parent; |
| ngx_http_copy_filter_conf_t *conf = child; |
| |
| ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 1, 32768); |
| |
| return NULL; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_copy_filter_init(ngx_conf_t *cf) |
| { |
| ngx_http_next_body_filter = ngx_http_top_body_filter; |
| ngx_http_top_body_filter = ngx_http_copy_filter; |
| |
| return NGX_OK; |
| } |
| |