Mercurial > hg > nginx-vendor-0-6
view src/http/ngx_http_variables.c @ 50:72eb30262aac NGINX_0_1_25
nginx 0.1.25
*) Bugfix: nginx did run on Linux parisc.
*) Feature: nginx now does not start under FreeBSD if the sysctl
kern.ipc.somaxconn value is too big.
*) Bugfix: if a request was internally redirected by the
ngx_http_index_module module to the ngx_http_proxy_module or
ngx_http_fastcgi_module modules, then the index file was not closed
after request completion.
*) Feature: the "proxy_pass" can be used in location with regular
expression.
*) Feature: the ngx_http_rewrite_filter_module module supports the
condition like "if ($HTTP_USER_AGENT ~ MSIE)".
*) Bugfix: nginx started too slow if the large number of addresses and
text values were used in the "geo" directive.
*) Change: a variable name must be declared as "$name" in the "geo"
directive. The previous variant without "$" is still supported, but
will be removed soon.
*) Feature: the "%{VARIABLE}v" logging parameter.
*) Feature: the "set $name value" directive.
*) Bugfix: gcc 4.0 compatibility.
*) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Sat, 19 Mar 2005 00:00:00 +0300 |
parents | 6cfc63e68377 |
children | b55cbf18157e |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_http.h> #define NGX_HTTP_VARS_HASH_PRIME 29 #define ngx_http_vars_hash_key(key, vn) \ { \ ngx_uint_t n; \ for (key = 0, n = 0; n < (vn)->len; n++) { \ key += (vn)->data[n]; \ } \ key %= NGX_HTTP_VARS_HASH_PRIME; \ } static ngx_http_variable_value_t * ngx_http_variable_header(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_unknown_header(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_remote_addr(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_uri(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_query_string(ngx_http_request_t *r, uintptr_t data); static ngx_array_t *ngx_http_core_variables_hash; static ngx_http_core_variable_t ngx_http_core_variables[] = { { ngx_string("HTTP_HOST"), ngx_http_variable_header, offsetof(ngx_http_headers_in_t, host) }, { ngx_string("HTTP_USER_AGENT"), ngx_http_variable_header, offsetof(ngx_http_headers_in_t, user_agent) }, { ngx_string("HTTP_REFERER"), ngx_http_variable_header, offsetof(ngx_http_headers_in_t, referer) }, #if (NGX_HTTP_GZIP) { ngx_string("HTTP_VIA"), ngx_http_variable_header, offsetof(ngx_http_headers_in_t, via) }, #endif #if (NGX_HTTP_PROXY) { ngx_string("HTTP_X_FORWARDED_FOR"), ngx_http_variable_header, offsetof(ngx_http_headers_in_t, x_forwarded_for) }, #endif { ngx_string("REMOTE_ADDR"), ngx_http_variable_remote_addr, 0 }, { ngx_string("DOCUMENT_URI"), ngx_http_variable_uri, 0 }, { ngx_string("QUERY_STRING"), ngx_http_variable_query_string, 0 }, { ngx_null_string, NULL, 0 } }; ngx_http_variable_t * ngx_http_add_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t set) { ngx_uint_t i; ngx_http_variable_t *v; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); v = cmcf->variables.elts; if (v == NULL) { if (ngx_array_init(&cmcf->variables, cf->pool, 4, sizeof(ngx_http_variable_t)) == NGX_ERROR) { return NULL; } } else { for (i = 0; i < cmcf->variables.nelts; i++) { if (name->len != v[i].name.len || ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0) { continue; } if (set && v[i].handler) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the duplicate \"%V\" variable", name); return NULL; } return &v[i]; } } v = ngx_array_push(&cmcf->variables); if (v == NULL) { return NULL; } v->name.len = name->len; v->name.data = ngx_palloc(cf->pool, name->len); if (v->name.data == NULL) { return NULL; } for (i = 0; i < name->len; i++) { v->name.data[i] = ngx_toupper(name->data[i]); } v->index = cmcf->variables.nelts - 1; v->handler = NULL; v->data = 0; return v; } ngx_http_variable_value_t * ngx_http_get_indexed_variable(ngx_http_request_t *r, ngx_uint_t index) { ngx_http_variable_t *v; ngx_http_variable_value_t *vv; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); if (cmcf->variables.elts == NULL || cmcf->variables.nelts <= index) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, "unknown variable index: %d", index); return NULL; } if (r->variables && r->variables[index]) { return r->variables[index]; } v = cmcf->variables.elts; vv = v[index].handler(r, v[index].data); if (r->variables == NULL) { r->variables = ngx_pcalloc(r->pool, cmcf->variables.nelts * sizeof(ngx_http_variable_value_t *)); if (r->variables == NULL) { return NULL; } } r->variables[index] = vv; return vv; } ngx_http_variable_value_t * ngx_http_get_variable(ngx_http_request_t *r, ngx_str_t *name) { ngx_uint_t i, key; ngx_http_variable_t *v; ngx_http_core_variable_t *cv; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); v = cmcf->variables.elts; for (i = 0; i < cmcf->variables.nelts; i++) { if (v[i].name.len != name->len) { continue; } if (ngx_strncmp(v[i].name.data, name->data, name->len) == 0) { return ngx_http_get_indexed_variable(r, v[i].index); } } ngx_http_vars_hash_key(key, name); cv = ngx_http_core_variables_hash[key].elts; for (i = 0; i < ngx_http_core_variables_hash[key].nelts; i++) { if (cv[i].name.len != name->len) { continue; } if (ngx_strncmp(cv[i].name.data, name->data, name->len) == 0) { return cv[i].handler(r, cv[i].data); } } if (ngx_strncmp(name->data, "HTTP_", 5) == 0) { return ngx_http_variable_unknown_header(r, (uintptr_t) name); } ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "unknown \"%V\" variable", name); return NGX_HTTP_VARIABLE_NOT_FOUND; } static ngx_http_variable_value_t * ngx_http_variable_header(ngx_http_request_t *r, uintptr_t data) { ngx_table_elt_t *h; ngx_http_variable_value_t *vv; h = *(ngx_table_elt_t **) ((char *) &r->headers_in + data); if (h == NULL) { return NGX_HTTP_VARIABLE_NOT_FOUND; } vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } vv->value = 0; vv->text = h->value; return vv; } static ngx_http_variable_value_t * ngx_http_variable_unknown_header(ngx_http_request_t *r, uintptr_t data) { ngx_str_t *var = (ngx_str_t *) data; u_char ch; ngx_uint_t i, n; ngx_list_part_t *part; ngx_table_elt_t *header; ngx_http_variable_value_t *vv; part = &r->headers_in.headers.part; header = part->elts; for (i = 0; /* void */ ; i++) { if (i >= part->nelts) { if (part->next == NULL) { break; } part = part->next; header = part->elts; i = 0; } for (n = 0; n + 5 < var->len && n < header[i].key.len; n++) { ch = header[i].key.data[n]; if (ch >= 'a' && ch <= 'z') { ch &= ~0x20; } else if (ch == '-') { ch = '_'; } if (var->data[n + 5] != ch) { break; } } if (n + 5 == var->len) { vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } vv->value = 0; vv->text = header[i].value; return vv; } } return NGX_HTTP_VARIABLE_NOT_FOUND; } static ngx_http_variable_value_t * ngx_http_variable_remote_addr(ngx_http_request_t *r, uintptr_t data) { ngx_http_variable_value_t *vv; vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } vv->value = 0; vv->text = r->connection->addr_text; return vv; } static ngx_http_variable_value_t * ngx_http_variable_uri(ngx_http_request_t *r, uintptr_t data) { ngx_http_variable_value_t *vv; vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } vv->value = 0; vv->text = r->uri; return vv; } static ngx_http_variable_value_t * ngx_http_variable_query_string(ngx_http_request_t *r, uintptr_t data) { ngx_http_variable_value_t *vv; vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } vv->value = 0; vv->text = r->args; return vv; } ngx_int_t ngx_http_variables_init(ngx_cycle_t *cycle) { ngx_uint_t i, j, key; ngx_http_variable_t *v; ngx_http_core_variable_t *cv, *vp; ngx_http_core_main_conf_t *cmcf; ngx_http_core_variables_hash = ngx_palloc(cycle->pool, NGX_HTTP_VARS_HASH_PRIME * sizeof(ngx_array_t)); if (ngx_http_core_variables_hash == NULL) { return NGX_ERROR; } for (i = 0; i < NGX_HTTP_VARS_HASH_PRIME; i++) { if (ngx_array_init(&ngx_http_core_variables_hash[i], cycle->pool, 4, sizeof(ngx_http_core_variable_t)) == NGX_ERROR) { return NGX_ERROR; } } for (cv = ngx_http_core_variables; cv->name.len; cv++) { ngx_http_vars_hash_key(key, &cv->name); vp = ngx_array_push(&ngx_http_core_variables_hash[key]); if (vp == NULL) { return NGX_ERROR; } *vp = *cv; } cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module); v = cmcf->variables.elts; for (i = 0; i < cmcf->variables.nelts; i++) { if (v[i].handler) { continue; } ngx_http_vars_hash_key(key, &v[i].name); cv = ngx_http_core_variables_hash[key].elts; for (j = 0; j < ngx_http_core_variables_hash[key].nelts; j++) { if (cv[j].name.len != v[i].name.len) { continue; } if (ngx_strncmp(cv[j].name.data, v[i].name.data, v[i].name.len) == 0) { v[i].handler = cv[j].handler; v[i].data = cv[j].data; continue; } } if (ngx_strncmp(v[i].name.data, "HTTP_", 5) == 0) { v[i].handler = ngx_http_variable_unknown_header; v[i].data = (uintptr_t) &v[i].name; continue; } ngx_log_error(NGX_LOG_ERR, cycle->log, 0, "unknown \"%V\" variable", &v[i].name); return NGX_ERROR; } return NGX_OK; }