Mercurial > hg > nginx
view src/http/ngx_http_variables.c @ 509:9b8c906f6e63 release-0.1.29
nginx-0.1.29-RELEASE import
*) Feature: the ngx_http_ssi_module supports "include virtual" command.
*) Feature: the ngx_http_ssi_module supports the condition command like
'if expr="$NAME"' and "else" and "endif" commands. Only one nested
level is supported.
*) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and
DATE_GMT variables and "config timefmt" command.
*) Feature: the "ssi_ignore_recycled_buffers" directive.
*) Bugfix: the "echo" command did not show the default value for the
empty QUERY_STRING variable.
*) Change: the ngx_http_proxy_module was rewritten.
*) Feature: the "proxy_redirect", "proxy_pass_request_headers",
"proxy_pass_request_body", and "proxy_method" directives.
*) Feature: the "proxy_set_header" directive. The "proxy_x_var" was
canceled and must be replaced with the proxy_set_header directive.
*) Change: the "proxy_preserve_host" is canceled and must be replaced
with the "proxy_set_header Host $host" and the "proxy_redirect off"
directives, the "proxy_set_header Host $host:$proxy_port" directive
and the appropriate proxy_redirect directives.
*) Change: the "proxy_set_x_real_ip" is canceled and must be replaced
with the "proxy_set_header X-Real-IP $remote_addr" directive.
*) Change: the "proxy_add_x_forwarded_for" is canceled and must be
replaced with
the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for"
directive.
*) Change: the "proxy_set_x_url" is canceled and must be replaced with
the "proxy_set_header X-URL http://$host:$server_port$request_uri"
directive.
*) Feature: the "fastcgi_param" directive.
*) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params"
directive are canceled and must be replaced with the fastcgi_param
directives.
*) Feature: the "index" directive can use the variables.
*) Feature: the "index" directive can be used at http and server levels.
*) Change: the last index only in the "index" directive can be absolute.
*) Feature: the "rewrite" directive can use the variables.
*) Feature: the "internal" directive.
*) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR,
SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME,
REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables.
*) Change: nginx now passes the invalid lines in a client request
headers or a backend response header.
*) Bugfix: if the backend did not transfer response for a long time and
the "send_timeout" was less than "proxy_read_timeout", then nginx
returned the 408 response.
*) Bugfix: the segmentation fault was occurred if the backend sent an
invalid line in response header; the bug had appeared in 0.1.26.
*) Bugfix: the segmentation fault may occurred in FastCGI fault
tolerance configuration.
*) Bugfix: the "expires" directive did not remove the previous
"Expires" and "Cache-Control" headers.
*) Bugfix: nginx did not take into account trailing dot in "Host"
header line.
*) Bugfix: the ngx_http_auth_module did not work under Linux.
*) Bugfix: the rewrite directive worked incorrectly, if the arguments
were in a request.
*) Bugfix: nginx could not be built on MacOS X.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 12 May 2005 14:58:06 +0000 |
parents | d4ea69372b94 |
children | 417a087c9c4d |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_http.h> static ngx_http_variable_value_t * ngx_http_variable_request(ngx_http_request_t *r, uintptr_t data); 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_host(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_remote_port(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_server_addr(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_server_port(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_document_root(ngx_http_request_t *r, uintptr_t data); static ngx_http_variable_value_t * ngx_http_variable_request_filename(ngx_http_request_t *r, uintptr_t data); /* * TODO: * Apache CGI: AUTH_TYPE, PATH_INFO (null), PATH_TRANSLATED * REMOTE_HOST (null), REMOTE_IDENT (null), * SERVER_SOFTWARE * * Apache SSI: DATE_GMT, DOCUMENT_NAME, LAST_MODIFIED, * USER_NAME (file owner) */ static ngx_http_variable_t ngx_http_core_variables[] = { { ngx_string("http_host"), ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.host), 0 }, { ngx_string("http_user_agent"), ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.user_agent), 0 }, { ngx_string("http_referer"), ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.referer), 0 }, #if (NGX_HTTP_GZIP) { ngx_string("http_via"), ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.via), 0 }, #endif #if (NGX_HTTP_PROXY) { ngx_string("http_x_forwarded_for"), ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.x_forwarded_for), 0 }, #endif { ngx_string("content_length"), ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.content_length), 0 }, { ngx_string("content_type"), ngx_http_variable_header, offsetof(ngx_http_request_t, headers_in.content_type), 0 }, { ngx_string("host"), ngx_http_variable_host, 0, 0 }, { ngx_string("remote_addr"), ngx_http_variable_remote_addr, 0, 0 }, { ngx_string("remote_port"), ngx_http_variable_remote_port, 0, 0 }, { ngx_string("server_addr"), ngx_http_variable_server_addr, 0, 0 }, { ngx_string("server_port"), ngx_http_variable_server_port, 0, 0 }, { ngx_string("server_protocol"), ngx_http_variable_request, offsetof(ngx_http_request_t, http_protocol), 0 }, { ngx_string("request_uri"), ngx_http_variable_request, offsetof(ngx_http_request_t, unparsed_uri), 0 }, { ngx_string("document_uri"), ngx_http_variable_request, offsetof(ngx_http_request_t, uri), 0 }, { ngx_string("document_root"), ngx_http_variable_document_root, 0, 0 }, { ngx_string("query_string"), ngx_http_variable_request, offsetof(ngx_http_request_t, args), NGX_HTTP_VAR_NOCACHABLE }, { ngx_string("request_filename"), ngx_http_variable_request_filename, 0, NGX_HTTP_VAR_NOCACHABLE }, { ngx_string("server_name"), ngx_http_variable_request, offsetof(ngx_http_request_t, server_name), 0 }, { ngx_string("request_method"), ngx_http_variable_request, offsetof(ngx_http_request_t, method_name), 0 }, { ngx_string("remote_user"), ngx_http_variable_request, offsetof(ngx_http_request_t, headers_in.user), 0 }, { ngx_null_string, NULL, 0, 0 } }; ngx_http_variable_t * ngx_http_add_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags) { 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->all_variables.elts; for (i = 0; i < cmcf->all_variables.nelts; i++) { if (name->len != v[i].name.len || ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0) { continue; } if (!(v[i].flags & NGX_HTTP_VAR_CHANGABLE)) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the duplicate \"%V\" variable", name); return NULL; } return &v[i]; } v = ngx_array_push(&cmcf->all_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_tolower(name->data[i]); } v->handler = NULL; v->data = 0; v->flags = flags; return v; } ngx_int_t ngx_http_get_variable_index(ngx_conf_t *cf, ngx_str_t *name) { 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 NGX_ERROR; } } 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; } return i; } } v = ngx_array_push(&cmcf->variables); if (v == NULL) { return NGX_ERROR; } v->name.len = name->len; v->name.data = ngx_palloc(cf->pool, name->len); if (v->name.data == NULL) { return NGX_ERROR; } for (i = 0; i < name->len; i++) { v->name.data[i] = ngx_tolower(name->data[i]); } v->handler = NULL; v->data = 0; v->flags = 0; return cmcf->variables.nelts - 1; } 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; } } if (!(v[index].flags & NGX_HTTP_VAR_NOCACHABLE)) { 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_main_conf_t *cmcf; cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); key = 0; for (i = 0; i < name->len; i++) { key += name->data[i]; } key %= cmcf->variables_hash.hash_size; v = (ngx_http_variable_t *) cmcf->variables_hash.buckets; if (v[key].name.len == name->len && ngx_strncmp(v[key].name.data, name->data, name->len) == 0) { return v[key].handler(r, v[key].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_VAR_NOT_FOUND; } static ngx_http_variable_value_t * ngx_http_variable_request(ngx_http_request_t *r, uintptr_t data) { ngx_str_t *s; ngx_http_variable_value_t *vv; s = (ngx_str_t *) ((char *) r + data); if (s->data == NULL) { return NGX_HTTP_VAR_NOT_FOUND; } vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } vv->value = 0; vv->text = *s; return vv; } 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 + data); if (h == NULL) { return NGX_HTTP_VAR_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_VAR_NOT_FOUND; } static ngx_http_variable_value_t * ngx_http_variable_host(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; if (r->headers_in.host) { vv->text.len = r->headers_in.host_name_len; vv->text.data = r->headers_in.host->value.data; } else { vv->text = r->server_name; } return vv; } 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_remote_port(ngx_http_request_t *r, uintptr_t data) { ngx_uint_t port; struct sockaddr_in *sin; 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.len = 0; vv->text.data = ngx_palloc(r->pool, sizeof("65535") - 1); if (vv->text.data == NULL) { return NULL; } /* AF_INET only */ if (r->connection->sockaddr->sa_family == AF_INET) { sin = (struct sockaddr_in *) r->connection->sockaddr; port = ntohs(sin->sin_port); if (port > 0 && port < 65536) { vv->value = port; vv->text.len = ngx_sprintf(vv->text.data, "%ui", port) - vv->text.data; } } return vv; } static ngx_http_variable_value_t * ngx_http_variable_server_addr(ngx_http_request_t *r, uintptr_t data) { socklen_t len; ngx_connection_t *c; struct sockaddr_in sin; 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.data = ngx_palloc(r->pool, INET_ADDRSTRLEN); if (vv->text.data == NULL) { return NULL; } c = r->connection; if (r->in_addr == 0) { len = sizeof(struct sockaddr_in); if (getsockname(c->fd, (struct sockaddr *) &sin, &len) == -1) { ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno, "getsockname() failed"); return NULL; } r->in_addr = sin.sin_addr.s_addr; } vv->text.len = ngx_inet_ntop(c->listening->family, &r->in_addr, vv->text.data, INET_ADDRSTRLEN); return vv; } static ngx_http_variable_value_t * ngx_http_variable_server_port(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 = r->port; vv->text.len = r->port_text->len - 1; vv->text.data = r->port_text->data + 1; return vv; } static ngx_http_variable_value_t * ngx_http_variable_document_root(ngx_http_request_t *r, uintptr_t data) { ngx_http_core_loc_conf_t *clcf; ngx_http_variable_value_t *vv; vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t)); if (vv == NULL) { return NULL; } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); vv->value = 0; vv->text = clcf->root; return vv; } static ngx_http_variable_value_t * ngx_http_variable_request_filename(ngx_http_request_t *r, uintptr_t data) { u_char *p; ngx_http_core_loc_conf_t *clcf; 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; clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (!clcf->alias) { vv->text.len = clcf->root.len + r->uri.len; vv->text.data = ngx_palloc(r->pool, vv->text.len); if (vv->text.data == NULL) { return NULL; } p = ngx_cpymem(vv->text.data, clcf->root.data, clcf->root.len); ngx_memcpy(p, r->uri.data, r->uri.len + 1); } else { vv->text.len = clcf->root.len + r->uri.len + 2 - clcf->name.len; vv->text.data = ngx_palloc(r->pool, vv->text.len); if (vv->text.data == NULL) { return NULL; } p = ngx_cpymem(vv->text.data, clcf->root.data, clcf->root.len); ngx_memcpy(p, r->uri.data + clcf->name.len, r->uri.len + 1 - clcf->name.len); } return vv; } ngx_int_t ngx_http_variables_add_core_vars(ngx_conf_t *cf) { ngx_http_variable_t *v, *cv; ngx_http_core_main_conf_t *cmcf; cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); if (ngx_array_init(&cmcf->all_variables, cf->pool, 32, sizeof(ngx_http_variable_t)) == NGX_ERROR) { return NGX_ERROR; } for (cv = ngx_http_core_variables; cv->name.len; cv++) { v = ngx_array_push(&cmcf->all_variables); if (v == NULL) { return NGX_ERROR; } *v = *cv; } return NGX_OK; } ngx_int_t ngx_http_variables_init_vars(ngx_conf_t *cf) { ngx_uint_t i, n; ngx_http_variable_t *v, *av; ngx_http_core_main_conf_t *cmcf; /* set the handlers for the indexed http variables */ cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); v = cmcf->variables.elts; av = cmcf->all_variables.elts; for (i = 0; i < cmcf->variables.nelts; i++) { for (n = 0; n < cmcf->all_variables.nelts; n++) { if (v[i].name.len == av[n].name.len && ngx_strncmp(v[i].name.data, av[n].name.data, v[i].name.len) == 0) { v[i].handler = av[n].handler; v[i].data = av[n].data; v[i].flags = av[n].flags; goto next; } } 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_EMERG, cf->log, 0, "unknown \"%V\" variable", &v[i].name); return NGX_ERROR; next: continue; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, cf->log, 0, "http variables: %ui", cmcf->variables.nelts); /* init the all http variables hash */ cmcf->variables_hash.max_size = 500; cmcf->variables_hash.bucket_limit = 1; cmcf->variables_hash.bucket_size = sizeof(ngx_http_variable_t); cmcf->variables_hash.name = "http variables"; if (ngx_hash_init(&cmcf->variables_hash, cf->pool, cmcf->all_variables.elts, cmcf->all_variables.nelts) != NGX_OK) { return NGX_ERROR; } ngx_log_debug3(NGX_LOG_DEBUG_HTTP, cf->log, 0, "http variables hash size: %ui for %ui values, " "max buckets per entry: %ui", cmcf->variables_hash.hash_size, cmcf->all_variables.nelts, cmcf->variables_hash.min_buckets); return NGX_OK; }