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ngx_http_browser_module
This commit is contained in:
Igor Sysoev
parent
e8f23e99aa
commit
3383ff67a5
@ -237,6 +237,11 @@ if [ $HTTP_EMPTY_GIF = YES ]; then
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HTTP_SRCS="$HTTP_SRCS $HTTP_EMPTY_GIF_SRCS"
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fi
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if [ $HTTP_BROWSER = YES ]; then
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HTTP_MODULES="$HTTP_MODULES $HTTP_BROWSER_MODULE"
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HTTP_SRCS="$HTTP_SRCS $HTTP_BROWSER_SRCS"
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fi
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# STUB
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#USE_MD5=YES
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#HTTP_SRCS="$HTTP_SRCS $HTPP_CACHE_SRCS"
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@ -68,6 +68,7 @@ HTTP_FASTCGI=YES
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HTTP_PERL=NO
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HTTP_MEMCACHED=YES
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HTTP_EMPTY_GIF=YES
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HTTP_BROWSER=YES
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# STUB
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HTTP_STUB_STATUS=NO
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@ -165,6 +166,7 @@ do
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--without-http_fastcgi_module) HTTP_FASTCGI=NO ;;
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--without-http_memcached_module) HTTP_MEMCACHED=NO ;;
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--without-http_empty_gif_module) HTTP_EMPTY_GIF=NO ;;
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--without-http_browser_module) HTTP_BROWSER=NO ;;
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--with-http_perl_module) HTTP_PERL=YES ;;
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--with-perl_modules_path=*) NGX_PERL_MODULES="$value" ;;
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@ -386,6 +386,10 @@ HTTP_EMPTY_GIF_MODULE=ngx_http_empty_gif_module
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HTTP_EMPTY_GIF_SRCS=src/http/modules/ngx_http_empty_gif_module.c
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HTTP_BROWSER_MODULE=ngx_http_browser_module
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HTTP_BROWSER_SRCS=src/http/modules/ngx_http_browser_module.c
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IMAP_INCS="src/imap"
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IMAP_DEPS="src/imap/ngx_imap.h"
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551
src/http/modules/ngx_http_browser_module.c
Normal file
551
src/http/modules/ngx_http_browser_module.c
Normal file
@ -0,0 +1,551 @@
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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/*
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* The module can check browser versions conforming to the following formats:
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* X, X.X, X.X.X, and X.X.X.X. The maximum values of each format may be
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* 4000, 4000.99, 4000.99.99, and 4000.99.99.99.
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*/
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typedef struct {
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u_char browser[12];
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size_t skip;
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size_t add;
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u_char name[12];
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} ngx_http_modern_browser_mask_t;
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typedef struct {
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ngx_uint_t version;
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size_t skip;
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size_t add;
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u_char name[12];
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} ngx_http_modern_browser_t;
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typedef struct {
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ngx_str_t name;
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ngx_http_get_variable_pt handler;
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} ngx_http_browser_t;
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typedef struct {
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ngx_array_t *modern_browsers;
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ngx_http_variable_value_t *value;
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} ngx_http_browser_conf_t;
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static ngx_int_t ngx_http_msie_variable(ngx_http_request_t *r,
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ngx_http_variable_value_t *v, uintptr_t data);
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static ngx_int_t ngx_http_browser_add_variable(ngx_conf_t *cf);
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static void *ngx_http_browser_create_conf(ngx_conf_t *cf);
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static char *ngx_http_browser_merge_conf(ngx_conf_t *cf, void *parent,
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void *child);
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static int ngx_libc_cdecl ngx_http_modern_browser_sort(const void *one,
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const void *two);
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static char *ngx_http_modern_browser(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static char *ngx_http_modern_browser_value(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static ngx_command_t ngx_http_browser_commands[] = {
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{ ngx_string("modern_browser"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
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ngx_http_modern_browser,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("modern_browser_value"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_http_modern_browser_value,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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ngx_null_command
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};
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static ngx_http_module_t ngx_http_browser_module_ctx = {
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ngx_http_browser_add_variable, /* preconfiguration */
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NULL, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_http_browser_create_conf, /* create location configuration */
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ngx_http_browser_merge_conf /* merge location configuration */
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};
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ngx_module_t ngx_http_browser_module = {
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NGX_MODULE_V1,
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&ngx_http_browser_module_ctx, /* module context */
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ngx_http_browser_commands, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_http_modern_browser_mask_t ngx_http_modern_browser_masks[] = {
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/* Opera must be the first browser to check */
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/*
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* "Opera/7.50 (X11; FreeBSD i386; U) [en]"
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* "Mozilla/5.0 (X11; FreeBSD i386; U) Opera 7.50 [en]"
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* "Mozilla/4.0 (compatible; MSIE 6.0; X11; FreeBSD i386) Opera 7.50 [en]"
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* "Opera/8.0 (Windows NT 5.1; U; ru)"
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* "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; en) Opera 8.0"
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* "Opera/9.01 (X11; FreeBSD 6 i386; U; en)"
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*/
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{ "opera",
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0,
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sizeof("Opera ") - 1,
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"Opera"},
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/* "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" */
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{ "msie",
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sizeof("Mozilla/4.0 (compatible; ") - 1,
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sizeof("MSIE ") - 1,
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"MSIE "},
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/*
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* "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020610"
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* "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU; rv:1.5) Gecko/20031006"
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* "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU; rv:1.6) Gecko/20040206
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* Firefox/0.8"
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* "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU; rv:1.7.8)
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* Gecko/20050511 Firefox/1.0.4"
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* "Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.8.0.5) Gecko/20060729
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* Firefox/1.5.0.5"
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*/
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{ "gecko",
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sizeof("Mozilla/5.0 (") - 1,
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sizeof("rv:") - 1,
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"rv:"},
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/*
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* "Mozilla/5.0 (Macintosh; U; PPC Mac OS X; ru-ru) AppleWebKit/125.2
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* (KHTML, like Gecko) Safari/125.7"
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* "Mozilla/5.0 (SymbianOS/9.1; U; en-us) AppleWebKit/413
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* (KHTML, like Gecko) Safari/413"
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* "Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/418
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* (KHTML, like Gecko) Safari/417.9.3"
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* "Mozilla/5.0 (Macintosh; U; PPC Mac OS X; ru-ru) AppleWebKit/418.8
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* (KHTML, like Gecko) Safari/419.3"
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*/
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{ "safari",
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sizeof("Mozilla/5.0 (") - 1,
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sizeof("Safari/") - 1,
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"Safari/"},
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/*
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* "Mozilla/5.0 (compatible; Konqueror/3.1; Linux)"
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* "Mozilla/5.0 (compatible; Konqueror/3.4; Linux) KHTML/3.4.2 (like Gecko)"
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* "Mozilla/5.0 (compatible; Konqueror/3.5; FreeBSD) KHTML/3.5.1
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* (like Gecko)"
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*/
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{ "konqueror",
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sizeof("Mozilla/5.0 (compatible; ") - 1,
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sizeof("Konqueror/") - 1,
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"Konqueror/"},
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{ "", 0, 0, "" }
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};
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static ngx_http_browser_t ngx_http_browsers[] = {
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{ ngx_string("msie"), ngx_http_msie_variable },
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{ ngx_null_string, NULL }
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};
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static ngx_int_t
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ngx_http_browser_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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uintptr_t data)
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{
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u_char *name, *ua, *last, c;
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ngx_uint_t i, version, ver, scale;
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ngx_http_browser_conf_t *cf;
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ngx_http_modern_browser_t *browsers;
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cf = ngx_http_get_module_loc_conf(r, ngx_http_browser_module);
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if (cf->modern_browsers == NULL || cf->value == NULL) {
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*v = ngx_http_variable_null_value;
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return NGX_OK;
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}
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#if 0
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if (!r->headers_in.msie && !r->headers_in.opera
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&& !r->headers_in.gecko && !r->headers_in.konqueror)
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{
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*v = ngx_http_variable_null_value;
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return NGX_OK;
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}
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#endif
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if (r->headers_in.user_agent == NULL) {
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*v = ngx_http_variable_null_value;
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return NGX_OK;
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}
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ua = r->headers_in.user_agent->value.data;
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last = ua + r->headers_in.user_agent->value.len;
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browsers = cf->modern_browsers->elts;
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for (i = 0; i < cf->modern_browsers->nelts; i++) {
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name = ua + browsers[i].skip;
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if (name >= last) {
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continue;
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}
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name = (u_char *) ngx_strstr(name, browsers[i].name);
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if (name == NULL) {
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continue;
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}
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"browser: \"%s\"", name);
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name += browsers[i].add;
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if (name >= last) {
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*v = ngx_http_variable_null_value;
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}
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ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"version: \"%ui\" \"%s\"", browsers[i].version, name);
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version = 0;
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ver = 0;
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scale = 1000000;
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while (name < last) {
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c = *name++;
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if (c >= '0' && c <= '9') {
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ver = ver * 10 + (c - '0');
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continue;
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}
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if (c == '.') {
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version += ver * scale;
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if (version > browsers[i].version) {
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*v = *cf->value;
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return NGX_OK;
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}
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ver = 0;
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scale /= 100;
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continue;
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}
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break;
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}
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version += ver * scale;
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ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"version: \"%ui\" \"%ui\"",
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browsers[i].version, version);
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if (version >= browsers[i].version) {
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*v = *cf->value;
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return NGX_OK;
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}
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}
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*v = ngx_http_variable_null_value;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_msie_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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uintptr_t data)
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{
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if (r->headers_in.msie) {
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*v = ngx_http_variable_true_value;
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return NGX_OK;
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}
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*v = ngx_http_variable_null_value;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_browser_add_variable(ngx_conf_t *cf)
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{
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ngx_http_browser_t *browser;
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ngx_http_variable_t *var;
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for (browser = ngx_http_browsers; browser->name.len; browser++) {
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var = ngx_http_add_variable(cf, &browser->name, NGX_HTTP_VAR_CHANGABLE);
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if (var == NULL) {
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return NGX_ERROR;
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}
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var->get_handler = browser->handler;
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}
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return NGX_OK;
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}
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static void *
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ngx_http_browser_create_conf(ngx_conf_t *cf)
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{
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ngx_http_browser_conf_t *conf;
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conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_browser_conf_t));
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if (conf == NULL) {
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return NGX_CONF_ERROR;
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}
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/*
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* set by ngx_pcalloc():
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*
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* conf->browsers = NULL;
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* conf->value = NULL;
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*/
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return conf;
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}
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static char *
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ngx_http_browser_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_http_browser_conf_t *prev = parent;
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ngx_http_browser_conf_t *conf = child;
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ngx_uint_t i, n;
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ngx_http_modern_browser_t *browsers, *opera;
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/*
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* At the merge the skip field is used to store the browser slot,
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* it will be used in sorting and then will overwritten
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* with a real skip value. The zero value means Opera.
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*/
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if (conf->modern_browsers == NULL) {
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conf->modern_browsers = prev->modern_browsers;
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} else {
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browsers = conf->modern_browsers->elts;
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for (i = 0; i < conf->modern_browsers->nelts; i++) {
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if (browsers[i].skip == 0) {
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goto found;
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}
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}
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/*
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* Opera may contain MSIE string, so if Opera was not enumerated
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* as modern browsers, then add it and set a unreachable version
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*/
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opera = ngx_array_push(conf->modern_browsers);
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if (opera == NULL) {
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return NGX_CONF_ERROR;
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}
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opera->skip = 0;
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opera->version = 4001000000U;
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browsers = conf->modern_browsers->elts;
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found:
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ngx_qsort(browsers, (size_t) conf->modern_browsers->nelts,
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sizeof(ngx_http_modern_browser_t),
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ngx_http_modern_browser_sort);
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for (i = 0; i < conf->modern_browsers->nelts; i++) {
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n = browsers[i].skip;
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browsers[i].skip = ngx_http_modern_browser_masks[n].skip;
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browsers[i].add = ngx_http_modern_browser_masks[n].add;
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(void) ngx_cpystrn(browsers[i].name,
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ngx_http_modern_browser_masks[n].name, 12);
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}
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}
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if (conf->value == NULL) {
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conf->value = prev->value;
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}
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return NGX_CONF_OK;
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}
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static int ngx_libc_cdecl
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ngx_http_modern_browser_sort(const void *one, const void *two)
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{
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ngx_http_modern_browser_t *first = (ngx_http_modern_browser_t *) one;
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ngx_http_modern_browser_t *second = (ngx_http_modern_browser_t *) two;
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return (first->skip - second->skip);
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}
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static char *
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ngx_http_modern_browser(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
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{
|
||||
ngx_http_browser_conf_t *bcf = conf;
|
||||
|
||||
u_char c;
|
||||
ngx_str_t *value;
|
||||
ngx_uint_t i, n, version, ver, scale;
|
||||
ngx_http_modern_browser_t *browser;
|
||||
ngx_http_modern_browser_mask_t *mask;
|
||||
|
||||
if (bcf->modern_browsers == NULL) {
|
||||
bcf->modern_browsers = ngx_array_create(cf->pool, 4,
|
||||
sizeof(ngx_http_modern_browser_t));
|
||||
if (bcf->modern_browsers == NULL) {
|
||||
return NGX_CONF_ERROR;
|
||||
}
|
||||
}
|
||||
|
||||
browser = ngx_array_push(bcf->modern_browsers);
|
||||
if (browser == NULL) {
|
||||
return NGX_CONF_ERROR;
|
||||
}
|
||||
|
||||
value = cf->args->elts;
|
||||
|
||||
mask = ngx_http_modern_browser_masks;
|
||||
|
||||
for (n = 0; mask[n].browser[0] != '\0'; n++) {
|
||||
if (ngx_strcasecmp(mask[n].browser, value[1].data) == 0) {
|
||||
goto found;
|
||||
}
|
||||
}
|
||||
|
||||
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
||||
"unknown browser name \"%V\"", &value[1]);
|
||||
|
||||
return NGX_CONF_ERROR;
|
||||
|
||||
found:
|
||||
|
||||
/*
|
||||
* at this stage the skip field is used to store the browser slot,
|
||||
* it will be used in sorting in merge stage and then will overwritten
|
||||
* with a real value
|
||||
*/
|
||||
|
||||
browser->skip = n;
|
||||
|
||||
version = 0;
|
||||
ver = 0;
|
||||
scale = 1000000;
|
||||
|
||||
for (i = 0; i < value[2].len; i++) {
|
||||
|
||||
c = value[2].data[i];
|
||||
|
||||
if (c >= '0' && c <= '9') {
|
||||
ver = ver * 10 + (c - '0');
|
||||
continue;
|
||||
}
|
||||
|
||||
if (c == '.') {
|
||||
version += ver * scale;
|
||||
ver = 0;
|
||||
scale /= 100;
|
||||
continue;
|
||||
}
|
||||
|
||||
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
||||
"invalid browser version \"%V\"", &value[2]);
|
||||
|
||||
return NGX_CONF_ERROR;
|
||||
}
|
||||
|
||||
version += ver * scale;
|
||||
|
||||
ngx_conf_log_error(NGX_LOG_NOTICE, cf, 0,
|
||||
"browser version \"%V\", %ui", &value[2], version);
|
||||
|
||||
browser->version = version;
|
||||
|
||||
return NGX_CONF_OK;
|
||||
}
|
||||
|
||||
|
||||
static char *
|
||||
ngx_http_modern_browser_value(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
||||
{
|
||||
ngx_http_browser_conf_t *bcf = conf;
|
||||
|
||||
ngx_str_t *value, name;
|
||||
ngx_http_variable_t *var;
|
||||
|
||||
value = cf->args->elts;
|
||||
|
||||
name.len = sizeof("browser") - 1;
|
||||
name.data = (u_char *) "browser";
|
||||
|
||||
var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGABLE);
|
||||
if (var == NULL) {
|
||||
return NGX_CONF_ERROR;
|
||||
}
|
||||
|
||||
var->get_handler = ngx_http_browser_variable;
|
||||
|
||||
bcf->value = ngx_palloc(cf->pool, sizeof(ngx_http_variable_value_t));
|
||||
if (bcf->value == NULL) {
|
||||
return NGX_CONF_ERROR;
|
||||
}
|
||||
|
||||
bcf->value->len = value[1].len;
|
||||
bcf->value->valid = 1;
|
||||
bcf->value->no_cachable = 0;
|
||||
bcf->value->not_found = 0;
|
||||
bcf->value->data = value[1].data;
|
||||
|
||||
return NGX_CONF_OK;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user