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src/http/modules/ngx_http_browser_module.c - nginx-1.7.10
Global variables defined
Data types defined
Functions defined
Macros defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_http.h>
- #define NGX_HTTP_MODERN_BROWSER 0
- #define NGX_HTTP_ANCIENT_BROWSER 1
- typedef struct {
- u_char browser[12];
- size_t skip;
- size_t add;
- u_char name[12];
- } ngx_http_modern_browser_mask_t;
- typedef struct {
- ngx_uint_t version;
- size_t skip;
- size_t add;
- u_char name[12];
- } ngx_http_modern_browser_t;
- typedef struct {
- ngx_str_t name;
- ngx_http_get_variable_pt handler;
- uintptr_t data;
- } ngx_http_browser_variable_t;
- typedef struct {
- ngx_array_t *modern_browsers;
- ngx_array_t *ancient_browsers;
- ngx_http_variable_value_t *modern_browser_value;
- ngx_http_variable_value_t *ancient_browser_value;
- unsigned modern_unlisted_browsers:1;
- unsigned netscape4:1;
- } ngx_http_browser_conf_t;
- static ngx_int_t ngx_http_msie_variable(ngx_http_request_t *r,
- ngx_http_variable_value_t *v, uintptr_t data);
- static ngx_int_t ngx_http_browser_variable(ngx_http_request_t *r,
- ngx_http_variable_value_t *v, uintptr_t data);
- static ngx_uint_t ngx_http_browser(ngx_http_request_t *r,
- ngx_http_browser_conf_t *cf);
- static ngx_int_t ngx_http_browser_add_variable(ngx_conf_t *cf);
- static void *ngx_http_browser_create_conf(ngx_conf_t *cf);
- static char *ngx_http_browser_merge_conf(ngx_conf_t *cf, void *parent,
- void *child);
- static int ngx_libc_cdecl ngx_http_modern_browser_sort(const void *one,
- const void *two);
- static char *ngx_http_modern_browser(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
- static char *ngx_http_ancient_browser(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
- static char *ngx_http_modern_browser_value(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
- static char *ngx_http_ancient_browser_value(ngx_conf_t *cf, ngx_command_t *cmd,
- void *conf);
- static ngx_command_t ngx_http_browser_commands[] = {
- { ngx_string("modern_browser"),
- NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
- ngx_http_modern_browser,
- NGX_HTTP_LOC_CONF_OFFSET,
- 0,
- NULL },
- { ngx_string("ancient_browser"),
- NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
- ngx_http_ancient_browser,
- NGX_HTTP_LOC_CONF_OFFSET,
- 0,
- NULL },
- { ngx_string("modern_browser_value"),
- NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
- ngx_http_modern_browser_value,
- NGX_HTTP_LOC_CONF_OFFSET,
- 0,
- NULL },
- { ngx_string("ancient_browser_value"),
- NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
- ngx_http_ancient_browser_value,
- NGX_HTTP_LOC_CONF_OFFSET,
- 0,
- NULL },
- ngx_null_command
- };
- static ngx_http_module_t ngx_http_browser_module_ctx = {
- ngx_http_browser_add_variable,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- ngx_http_browser_create_conf,
- ngx_http_browser_merge_conf
- };
- ngx_module_t ngx_http_browser_module = {
- NGX_MODULE_V1,
- &ngx_http_browser_module_ctx,
- ngx_http_browser_commands,
- NGX_HTTP_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NGX_MODULE_V1_PADDING
- };
- static ngx_http_modern_browser_mask_t ngx_http_modern_browser_masks[] = {
-
-
- { "opera",
- 0,
- sizeof("Opera ") - 1,
- "Opera"},
-
- { "msie",
- sizeof("Mozilla/4.0 (compatible; ") - 1,
- sizeof("MSIE ") - 1,
- "MSIE "},
-
- { "gecko",
- sizeof("Mozilla/5.0 (") - 1,
- sizeof("rv:") - 1,
- "rv:"},
-
- { "safari",
- sizeof("Mozilla/5.0 (") - 1,
- sizeof("Safari/") - 1,
- "Safari/"},
-
- { "konqueror",
- sizeof("Mozilla/5.0 (compatible; ") - 1,
- sizeof("Konqueror/") - 1,
- "Konqueror/"},
- { "", 0, 0, "" }
- };
- static ngx_http_browser_variable_t ngx_http_browsers[] = {
- { ngx_string("msie"), ngx_http_msie_variable, 0 },
- { ngx_string("modern_browser"), ngx_http_browser_variable,
- NGX_HTTP_MODERN_BROWSER },
- { ngx_string("ancient_browser"), ngx_http_browser_variable,
- NGX_HTTP_ANCIENT_BROWSER },
- { ngx_null_string, NULL, 0 }
- };
- static ngx_int_t
- ngx_http_browser_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
- uintptr_t data)
- {
- ngx_uint_t rc;
- ngx_http_browser_conf_t *cf;
- cf = ngx_http_get_module_loc_conf(r, ngx_http_browser_module);
- rc = ngx_http_browser(r, cf);
- if (data == NGX_HTTP_MODERN_BROWSER && rc == NGX_HTTP_MODERN_BROWSER) {
- *v = *cf->modern_browser_value;
- return NGX_OK;
- }
- if (data == NGX_HTTP_ANCIENT_BROWSER && rc == NGX_HTTP_ANCIENT_BROWSER) {
- *v = *cf->ancient_browser_value;
- return NGX_OK;
- }
- *v = ngx_http_variable_null_value;
- return NGX_OK;
- }
- static ngx_uint_t
- ngx_http_browser(ngx_http_request_t *r, ngx_http_browser_conf_t *cf)
- {
- size_t len;
- u_char *name, *ua, *last, c;
- ngx_str_t *ancient;
- ngx_uint_t i, version, ver, scale;
- ngx_http_modern_browser_t *modern;
- if (r->headers_in.user_agent == NULL) {
- if (cf->modern_unlisted_browsers) {
- return NGX_HTTP_MODERN_BROWSER;
- }
- return NGX_HTTP_ANCIENT_BROWSER;
- }
- ua = r->headers_in.user_agent->value.data;
- len = r->headers_in.user_agent->value.len;
- last = ua + len;
- if (cf->modern_browsers) {
- modern = cf->modern_browsers->elts;
- for (i = 0; i < cf->modern_browsers->nelts; i++) {
- name = ua + modern[i].skip;
- if (name >= last) {
- continue;
- }
- name = (u_char *) ngx_strstr(name, modern[i].name);
- if (name == NULL) {
- continue;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "browser: \"%s\"", name);
- name += modern[i].add;
- if (name >= last) {
- continue;
- }
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "version: \"%ui\" \"%s\"", modern[i].version, name);
- version = 0;
- ver = 0;
- scale = 1000000;
- while (name < last) {
- c = *name++;
- if (c >= '0' && c <= '9') {
- ver = ver * 10 + (c - '0');
- continue;
- }
- if (c == '.') {
- version += ver * scale;
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "version: \"%ui\" \"%ui\"",
- modern[i].version, version);
- if (version > modern[i].version) {
- return NGX_HTTP_MODERN_BROWSER;
- }
- ver = 0;
- scale /= 100;
- continue;
- }
- break;
- }
- version += ver * scale;
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "version: \"%ui\" \"%ui\"",
- modern[i].version, version);
- if (version >= modern[i].version) {
- return NGX_HTTP_MODERN_BROWSER;
- }
- return NGX_HTTP_ANCIENT_BROWSER;
- }
- if (!cf->modern_unlisted_browsers) {
- return NGX_HTTP_ANCIENT_BROWSER;
- }
- }
- if (cf->netscape4) {
- if (len > sizeof("Mozilla/4.72 ") - 1
- && ngx_strncmp(ua, "Mozilla/", sizeof("Mozilla/") - 1) == 0
- && ua[8] > '0' && ua[8] < '5')
- {
- return NGX_HTTP_ANCIENT_BROWSER;
- }
- }
- if (cf->ancient_browsers) {
- ancient = cf->ancient_browsers->elts;
- for (i = 0; i < cf->ancient_browsers->nelts; i++) {
- if (len >= ancient[i].len
- && ngx_strstr(ua, ancient[i].data) != NULL)
- {
- return NGX_HTTP_ANCIENT_BROWSER;
- }
- }
- }
- if (cf->modern_unlisted_browsers) {
- return NGX_HTTP_MODERN_BROWSER;
- }
- return NGX_HTTP_ANCIENT_BROWSER;
- }
- static ngx_int_t
- ngx_http_msie_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
- uintptr_t data)
- {
- if (r->headers_in.msie) {
- *v = ngx_http_variable_true_value;
- return NGX_OK;
- }
- *v = ngx_http_variable_null_value;
- return NGX_OK;
- }
- static ngx_int_t
- ngx_http_browser_add_variable(ngx_conf_t *cf)
- {
- ngx_http_browser_variable_t *var;
- ngx_http_variable_t *v;
- for (var = ngx_http_browsers; var->name.len; var++) {
- v = ngx_http_add_variable(cf, &var->name, NGX_HTTP_VAR_CHANGEABLE);
- if (v == NULL) {
- return NGX_ERROR;
- }
- v->get_handler = var->handler;
- v->data = var->data;
- }
- return NGX_OK;
- }
- static void *
- ngx_http_browser_create_conf(ngx_conf_t *cf)
- {
- ngx_http_browser_conf_t *conf;
- conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_browser_conf_t));
- if (conf == NULL) {
- return NULL;
- }
-
- return conf;
- }
- static char *
- ngx_http_browser_merge_conf(ngx_conf_t *cf, void *parent, void *child)
- {
- ngx_http_browser_conf_t *prev = parent;
- ngx_http_browser_conf_t *conf = child;
- ngx_uint_t i, n;
- ngx_http_modern_browser_t *browsers, *opera;
-
- if (conf->modern_browsers == NULL && conf->modern_unlisted_browsers == 0) {
- conf->modern_browsers = prev->modern_browsers;
- conf->modern_unlisted_browsers = prev->modern_unlisted_browsers;
- } else if (conf->modern_browsers != NULL) {
- browsers = conf->modern_browsers->elts;
- for (i = 0; i < conf->modern_browsers->nelts; i++) {
- if (browsers[i].skip == 0) {
- goto found;
- }
- }
-
- opera = ngx_array_push(conf->modern_browsers);
- if (opera == NULL) {
- return NGX_CONF_ERROR;
- }
- opera->skip = 0;
- opera->version = 4001000000U;
- browsers = conf->modern_browsers->elts;
- found:
- ngx_qsort(browsers, (size_t) conf->modern_browsers->nelts,
- sizeof(ngx_http_modern_browser_t),
- ngx_http_modern_browser_sort);
- for (i = 0; i < conf->modern_browsers->nelts; i++) {
- n = browsers[i].skip;
- browsers[i].skip = ngx_http_modern_browser_masks[n].skip;
- browsers[i].add = ngx_http_modern_browser_masks[n].add;
- (void) ngx_cpystrn(browsers[i].name,
- ngx_http_modern_browser_masks[n].name, 12);
- }
- }
- if (conf->ancient_browsers == NULL && conf->netscape4 == 0) {
- conf->ancient_browsers = prev->ancient_browsers;
- conf->netscape4 = prev->netscape4;
- }
- if (conf->modern_browser_value == NULL) {
- conf->modern_browser_value = prev->modern_browser_value;
- }
- if (conf->modern_browser_value == NULL) {
- conf->modern_browser_value = &ngx_http_variable_true_value;
- }
- if (conf->ancient_browser_value == NULL) {
- conf->ancient_browser_value = prev->ancient_browser_value;
- }
- if (conf->ancient_browser_value == NULL) {
- conf->ancient_browser_value = &ngx_http_variable_true_value;
- }
- return NGX_CONF_OK;
- }
- static int ngx_libc_cdecl
- ngx_http_modern_browser_sort(const void *one, const void *two)
- {
- ngx_http_modern_browser_t *first = (ngx_http_modern_browser_t *) one;
- ngx_http_modern_browser_t *second = (ngx_http_modern_browser_t *) two;
- return (first->skip - second->skip);
- }
- static char *
- ngx_http_modern_browser(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
- {
- 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;
- value = cf->args->elts;
- if (cf->args->nelts == 2) {
- if (ngx_strcmp(value[1].data, "unlisted") == 0) {
- bcf->modern_unlisted_browsers = 1;
- return NGX_CONF_OK;
- }
- return NGX_CONF_ERROR;
- }
- if (bcf->modern_browsers == NULL) {
- bcf->modern_browsers = ngx_array_create(cf->pool, 5,
- 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;
- }
- 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:
-
- 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;
- browser->version = version;
- return NGX_CONF_OK;
- }
- static char *
- ngx_http_ancient_browser(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
- {
- ngx_http_browser_conf_t *bcf = conf;
- ngx_str_t *value, *browser;
- ngx_uint_t i;
- value = cf->args->elts;
- for (i = 1; i < cf->args->nelts; i++) {
- if (ngx_strcmp(value[i].data, "netscape4") == 0) {
- bcf->netscape4 = 1;
- continue;
- }
- if (bcf->ancient_browsers == NULL) {
- bcf->ancient_browsers = ngx_array_create(cf->pool, 4,
- sizeof(ngx_str_t));
- if (bcf->ancient_browsers == NULL) {
- return NGX_CONF_ERROR;
- }
- }
- browser = ngx_array_push(bcf->ancient_browsers);
- if (browser == NULL) {
- return NGX_CONF_ERROR;
- }
- *browser = value[i];
- }
- 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;
- bcf->modern_browser_value = ngx_palloc(cf->pool,
- sizeof(ngx_http_variable_value_t));
- if (bcf->modern_browser_value == NULL) {
- return NGX_CONF_ERROR;
- }
- value = cf->args->elts;
- bcf->modern_browser_value->len = value[1].len;
- bcf->modern_browser_value->valid = 1;
- bcf->modern_browser_value->no_cacheable = 0;
- bcf->modern_browser_value->not_found = 0;
- bcf->modern_browser_value->data = value[1].data;
- return NGX_CONF_OK;
- }
- static char *
- ngx_http_ancient_browser_value(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
- {
- ngx_http_browser_conf_t *bcf = conf;
- ngx_str_t *value;
- bcf->ancient_browser_value = ngx_palloc(cf->pool,
- sizeof(ngx_http_variable_value_t));
- if (bcf->ancient_browser_value == NULL) {
- return NGX_CONF_ERROR;
- }
- value = cf->args->elts;
- bcf->ancient_browser_value->len = value[1].len;
- bcf->ancient_browser_value->valid = 1;
- bcf->ancient_browser_value->no_cacheable = 0;
- bcf->ancient_browser_value->not_found = 0;
- bcf->ancient_browser_value->data = value[1].data;
- return NGX_CONF_OK;
- }
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