Mercurial > hg > nginx
diff src/http/modules/ngx_http_addition_filter_module.c @ 629:65bf042c0b4f release-0.3.36
nginx-0.3.36-RELEASE import
*) Feature: the ngx_http_addition_filter_module.
*) Feature: the "proxy_pass" and "fastcgi_pass" directives may be used
inside the "if" block.
*) Feature: the "proxy_ignore_client_abort" and
"fastcgi_ignore_client_abort" directives.
*) Feature: the "$request_completion" variable.
*) Feature: the ngx_http_perl_module supports the $r->request_method
and $r->remote_addr.
*) Feature: the ngx_http_ssi_module supports the "elif" command.
*) Bugfix: the "\/" string in the expression of the "if" command of the
ngx_http_ssi_module was treated incorrectly.
*) Bugfix: in the regular expressions in the "if" command of the
ngx_http_ssi_module.
*) Bugfix: if the relative path was specified in the
"client_body_temp_path", "proxy_temp_path", "fastcgi_temp_path", and
"perl_modules" directives, then the directory was used relatively to
a current path but not to a server prefix.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 05 Apr 2006 13:40:54 +0000 |
parents | |
children | 5d2b8078c1c2 |
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new file mode 100644 --- /dev/null +++ b/src/http/modules/ngx_http_addition_filter_module.c @@ -0,0 +1,228 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_http.h> + + +typedef struct { + ngx_str_t before_body; + ngx_str_t after_body; +} ngx_http_addition_conf_t; + + +typedef struct { + unsigned before_body_sent:1; + unsigned after_body_sent:1; +} ngx_http_addition_ctx_t; + + +static ngx_int_t ngx_http_addition_filter_init(ngx_cycle_t *cycle); +static void *ngx_http_addition_create_conf(ngx_conf_t *cf); +static char *ngx_http_addition_merge_conf(ngx_conf_t *cf, void *parent, + void *child); + + +static ngx_command_t ngx_http_addition_commands[] = { + + { ngx_string("add_before_body"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_addition_conf_t, before_body), + NULL }, + + { ngx_string("add_after_body"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, + ngx_conf_set_str_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_addition_conf_t, after_body), + NULL }, + + ngx_null_command +}; + + +static ngx_http_module_t ngx_http_addition_filter_module_ctx = { + NULL, /* preconfiguration */ + NULL, /* postconfiguration */ + + NULL, /* create main configuration */ + NULL, /* init main configuration */ + + NULL, /* create server configuration */ + NULL, /* merge server configuration */ + + ngx_http_addition_create_conf, /* create location configuration */ + ngx_http_addition_merge_conf /* merge location configuration */ +}; + + +ngx_module_t ngx_http_addition_filter_module = { + NGX_MODULE_V1, + &ngx_http_addition_filter_module_ctx, /* module context */ + ngx_http_addition_commands, /* module directives */ + NGX_HTTP_MODULE, /* module type */ + NULL, /* init master */ + ngx_http_addition_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_header_filter_pt ngx_http_next_header_filter; +static ngx_http_output_body_filter_pt ngx_http_next_body_filter; + + +static ngx_int_t +ngx_http_addition_header_filter(ngx_http_request_t *r) +{ + ngx_http_addition_ctx_t *ctx; + ngx_http_addition_conf_t *conf; + + if (r->headers_out.status != NGX_HTTP_OK || r != r->main) { + return ngx_http_next_header_filter(r); + } + + if (ngx_strncasecmp(r->headers_out.content_type.data, "text/html", + sizeof("text/html") - 1) + != 0) + { + return ngx_http_next_header_filter(r); + } + + conf = ngx_http_get_module_loc_conf(r, ngx_http_addition_filter_module); + + if (conf->before_body.len == 0 && conf->after_body.len == 0) { + return ngx_http_next_header_filter(r); + } + + ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_addition_ctx_t)); + if (ctx == NULL) { + return NGX_ERROR; + } + + ngx_http_set_ctx(r, ctx, ngx_http_addition_filter_module); + + ngx_http_clear_content_length(r); + ngx_http_clear_accept_ranges(r); + + return ngx_http_next_header_filter(r); +} + + +static ngx_int_t +ngx_http_addition_body_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + ngx_int_t rc; + ngx_uint_t last; + ngx_chain_t *cl; + ngx_http_addition_ctx_t *ctx; + ngx_http_addition_conf_t *conf; + + if (in == NULL || r->header_only) { + return ngx_http_next_body_filter(r, in); + } + + ctx = ngx_http_get_module_ctx(r, ngx_http_addition_filter_module); + + if (ctx == NULL) { + return ngx_http_next_body_filter(r, in); + } + + conf = ngx_http_get_module_loc_conf(r, ngx_http_addition_filter_module); + + if (!ctx->before_body_sent) { + ctx->before_body_sent = 1; + + if (conf->before_body.len) { + if (ngx_http_subrequest(r, &conf->before_body, NULL, 0) != NGX_OK) { + return NGX_ERROR; + } + } + } + + last = 0; + + for (cl = in; cl; cl = cl->next) { + if (cl->buf->last_buf) { + cl->buf->last_buf = 0; + last = 1; + } + } + + rc = ngx_http_next_body_filter(r, in); + + if (rc == NGX_ERROR + || !last + || ctx->after_body_sent + || conf->after_body.len == 0) + { + return rc; + } + + if (ngx_http_subrequest(r, &conf->after_body, NULL, 0) != NGX_OK) { + return NGX_ERROR; + } + + ctx->after_body_sent = 1; + + return ngx_http_send_special(r, NGX_HTTP_LAST); +} + + +static ngx_int_t +ngx_http_addition_filter_init(ngx_cycle_t *cycle) +{ + ngx_http_next_header_filter = ngx_http_top_header_filter; + ngx_http_top_header_filter = ngx_http_addition_header_filter; + + ngx_http_next_body_filter = ngx_http_top_body_filter; + ngx_http_top_body_filter = ngx_http_addition_body_filter; + + return NGX_OK; +} + + +static void * +ngx_http_addition_create_conf(ngx_conf_t *cf) +{ + ngx_http_addition_conf_t *conf; + + conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_addition_conf_t)); + if (conf == NULL) { + return NGX_CONF_ERROR; + } + + /* + * set by ngx_pcalloc(): + * + * conf->before_body.len = 0; + * conf->before_body.date = NULL; + * conf->after_body.len = 0; + * conf->after_body.date = NULL; + */ + + return conf; +} + + +static char * +ngx_http_addition_merge_conf(ngx_conf_t *cf, void *parent, void *child) +{ + ngx_http_addition_conf_t *prev = parent; + ngx_http_addition_conf_t *conf = child; + + ngx_conf_merge_str_value(conf->before_body, prev->before_body, ""); + ngx_conf_merge_str_value(conf->after_body, prev->after_body, ""); + + return NGX_CONF_OK; +}