Mercurial > hg > nginx-vendor-current
view src/http/modules/ngx_http_proxy_module.c @ 570:8246d8a2c2be NGINX_0_8_37
nginx 0.8.37
*) Feature: the ngx_http_split_clients_module.
*) Feature: the "map" directive supports keys more than 255 characters.
*) Bugfix: nginx ignored the "private" and "no-store" values in the
"Cache-Control" backend response header line.
*) Bugfix: a "stub" parameter of an "include" SSI directive was not
used, if empty response has 200 status code.
*) Bugfix: if a proxied or FastCGI request was internally redirected to
another proxied or FastCGI location, then a segmentation fault might
occur in a worker process; the bug had appeared in 0.8.33.
Thanks to Yichun Zhang.
*) Bugfix: IMAP connections may hang until they timed out while talking
to Zimbra server.
Thanks to Alan Batie.
| author | Igor Sysoev <http://sysoev.ru> |
|---|---|
| date | Mon, 17 May 2010 00:00:00 +0400 |
| parents | be4f34123024 |
| children | ff463db0be31 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> typedef struct ngx_http_proxy_redirect_s ngx_http_proxy_redirect_t; typedef ngx_int_t (*ngx_http_proxy_redirect_pt)(ngx_http_request_t *r, ngx_table_elt_t *h, size_t prefix, ngx_http_proxy_redirect_t *pr); struct ngx_http_proxy_redirect_s { ngx_http_proxy_redirect_pt handler; ngx_str_t redirect; union { ngx_str_t text; struct { void *lengths; void *values; } vars; void *regex; } replacement; }; typedef struct { ngx_str_t key_start; ngx_str_t schema; ngx_str_t host_header; ngx_str_t port; ngx_str_t uri; } ngx_http_proxy_vars_t; typedef struct { ngx_http_upstream_conf_t upstream; ngx_array_t *flushes; ngx_array_t *body_set_len; ngx_array_t *body_set; ngx_array_t *headers_set_len; ngx_array_t *headers_set; ngx_hash_t headers_set_hash; ngx_array_t *headers_source; ngx_array_t *headers_names; ngx_array_t *proxy_lengths; ngx_array_t *proxy_values; ngx_array_t *redirects; ngx_str_t body_source; ngx_str_t method; ngx_str_t location; ngx_str_t url; #if (NGX_HTTP_CACHE) ngx_http_complex_value_t cache_key; #endif ngx_http_proxy_vars_t vars; ngx_flag_t redirect; ngx_uint_t headers_hash_max_size; ngx_uint_t headers_hash_bucket_size; } ngx_http_proxy_loc_conf_t; typedef struct { ngx_uint_t status; ngx_uint_t status_count; u_char *status_start; u_char *status_end; ngx_http_proxy_vars_t vars; size_t internal_body_length; } ngx_http_proxy_ctx_t; #define NGX_HTTP_PROXY_PARSE_NO_HEADER 20 static ngx_int_t ngx_http_proxy_eval(ngx_http_request_t *r, ngx_http_proxy_ctx_t *ctx, ngx_http_proxy_loc_conf_t *plcf); #if (NGX_HTTP_CACHE) static ngx_int_t ngx_http_proxy_create_key(ngx_http_request_t *r); #endif static ngx_int_t ngx_http_proxy_create_request(ngx_http_request_t *r); static ngx_int_t ngx_http_proxy_reinit_request(ngx_http_request_t *r); static ngx_int_t ngx_http_proxy_process_status_line(ngx_http_request_t *r); static ngx_int_t ngx_http_proxy_parse_status_line(ngx_http_request_t *r, ngx_http_proxy_ctx_t *ctx); static ngx_int_t ngx_http_proxy_process_header(ngx_http_request_t *r); static void ngx_http_proxy_abort_request(ngx_http_request_t *r); static void ngx_http_proxy_finalize_request(ngx_http_request_t *r, ngx_int_t rc); static ngx_int_t ngx_http_proxy_host_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_proxy_port_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_proxy_internal_body_length_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r, ngx_table_elt_t *h, size_t prefix); static ngx_int_t ngx_http_proxy_add_variables(ngx_conf_t *cf); static void *ngx_http_proxy_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_int_t ngx_http_proxy_merge_headers(ngx_conf_t *cf, ngx_http_proxy_loc_conf_t *conf, ngx_http_proxy_loc_conf_t *prev); static char *ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); #if (NGX_HTTP_CACHE) static char *ngx_http_proxy_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_proxy_cache_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); #endif static char *ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_proxy_upstream_max_fails_unsupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_proxy_upstream_fail_timeout_unsupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); #if (NGX_HTTP_SSL) static ngx_int_t ngx_http_proxy_set_ssl(ngx_conf_t *cf, ngx_http_proxy_loc_conf_t *plcf); #endif static void ngx_http_proxy_set_vars(ngx_url_t *u, ngx_http_proxy_vars_t *v); static ngx_conf_post_t ngx_http_proxy_lowat_post = { ngx_http_proxy_lowat_check }; static ngx_conf_bitmask_t ngx_http_proxy_next_upstream_masks[] = { { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR }, { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT }, { ngx_string("invalid_header"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER }, { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 }, { ngx_string("http_502"), NGX_HTTP_UPSTREAM_FT_HTTP_502 }, { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 }, { ngx_string("http_504"), NGX_HTTP_UPSTREAM_FT_HTTP_504 }, { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 }, { ngx_string("updating"), NGX_HTTP_UPSTREAM_FT_UPDATING }, { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF }, { ngx_null_string, 0 } }; static ngx_conf_bitmask_t ngx_http_proxy_ignore_headers_masks[] = { { ngx_string("X-Accel-Redirect"), NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT }, { ngx_string("X-Accel-Expires"), NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES }, { ngx_string("Expires"), NGX_HTTP_UPSTREAM_IGN_EXPIRES }, { ngx_string("Cache-Control"), NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL }, { ngx_null_string, 0 } }; ngx_module_t ngx_http_proxy_module; static ngx_command_t ngx_http_proxy_commands[] = { { ngx_string("proxy_pass"), NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_HTTP_LMT_CONF|NGX_CONF_TAKE1, ngx_http_proxy_pass, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("proxy_redirect"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12, ngx_http_proxy_redirect, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("proxy_store"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_proxy_store, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("proxy_store_access"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123, ngx_conf_set_access_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.store_access), NULL }, { ngx_string("proxy_buffering"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.buffering), NULL }, { ngx_string("proxy_ignore_client_abort"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.ignore_client_abort), NULL }, { ngx_string("proxy_bind"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_upstream_bind_set_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.local), NULL }, { ngx_string("proxy_connect_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.connect_timeout), NULL }, { ngx_string("proxy_send_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.send_timeout), NULL }, { ngx_string("proxy_send_lowat"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.send_lowat), &ngx_http_proxy_lowat_post }, { ngx_string("proxy_intercept_errors"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.intercept_errors), NULL }, { ngx_string("proxy_set_header"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, ngx_conf_set_keyval_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, headers_source), NULL }, { ngx_string("proxy_headers_hash_max_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, headers_hash_max_size), NULL }, { ngx_string("proxy_headers_hash_bucket_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, headers_hash_bucket_size), NULL }, { ngx_string("proxy_set_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_proxy_loc_conf_t, body_source), NULL }, { ngx_string("proxy_method"), 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_proxy_loc_conf_t, method), NULL }, { ngx_string("proxy_pass_request_headers"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_headers), NULL }, { ngx_string("proxy_pass_request_body"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_request_body), NULL }, { ngx_string("proxy_buffer_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.buffer_size), NULL }, { ngx_string("proxy_read_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.read_timeout), NULL }, { ngx_string("proxy_buffers"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, ngx_conf_set_bufs_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.bufs), NULL }, { ngx_string("proxy_busy_buffers_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.busy_buffers_size_conf), NULL }, #if (NGX_HTTP_CACHE) { ngx_string("proxy_cache"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_http_proxy_cache, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("proxy_cache_key"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_http_proxy_cache_key, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("proxy_cache_path"), NGX_HTTP_MAIN_CONF|NGX_CONF_2MORE, ngx_http_file_cache_set_slot, 0, 0, &ngx_http_proxy_module }, { ngx_string("proxy_cache_valid"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, ngx_http_file_cache_valid_set_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_valid), NULL }, { ngx_string("proxy_cache_min_uses"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_min_uses), NULL }, { ngx_string("proxy_cache_use_stale"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, ngx_conf_set_bitmask_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_use_stale), &ngx_http_proxy_next_upstream_masks }, { ngx_string("proxy_cache_methods"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, ngx_conf_set_bitmask_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_methods), &ngx_http_upstream_cache_method_mask }, #endif { ngx_string("proxy_temp_path"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234, ngx_conf_set_path_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_path), NULL }, { ngx_string("proxy_max_temp_file_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.max_temp_file_size_conf), NULL }, { ngx_string("proxy_temp_file_write_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.temp_file_write_size_conf), NULL }, { ngx_string("proxy_next_upstream"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, ngx_conf_set_bitmask_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.next_upstream), &ngx_http_proxy_next_upstream_masks }, { ngx_string("proxy_upstream_max_fails"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_proxy_upstream_max_fails_unsupported, 0, 0, NULL }, { ngx_string("proxy_upstream_fail_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_proxy_upstream_fail_timeout_unsupported, 0, 0, NULL }, { ngx_string("proxy_pass_header"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_str_array_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.pass_headers), NULL }, { ngx_string("proxy_hide_header"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_str_array_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.hide_headers), NULL }, { ngx_string("proxy_ignore_headers"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, ngx_conf_set_bitmask_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.ignore_headers), &ngx_http_proxy_ignore_headers_masks }, #if (NGX_HTTP_SSL) { ngx_string("proxy_ssl_session_reuse"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_proxy_loc_conf_t, upstream.ssl_session_reuse), NULL }, #endif ngx_null_command }; static ngx_http_module_t ngx_http_proxy_module_ctx = { ngx_http_proxy_add_variables, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_proxy_create_loc_conf, /* create location configration */ ngx_http_proxy_merge_loc_conf /* merge location configration */ }; ngx_module_t ngx_http_proxy_module = { NGX_MODULE_V1, &ngx_http_proxy_module_ctx, /* module context */ ngx_http_proxy_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static char ngx_http_proxy_version[] = " HTTP/1.0" CRLF; static ngx_keyval_t ngx_http_proxy_headers[] = { { ngx_string("Host"), ngx_string("$proxy_host") }, { ngx_string("Connection"), ngx_string("close") }, { ngx_string("Keep-Alive"), ngx_string("") }, { ngx_string("Expect"), ngx_string("") }, { ngx_null_string, ngx_null_string } }; static ngx_str_t ngx_http_proxy_hide_headers[] = { ngx_string("Date"), ngx_string("Server"), ngx_string("X-Pad"), ngx_string("X-Accel-Expires"), ngx_string("X-Accel-Redirect"), ngx_string("X-Accel-Limit-Rate"), ngx_string("X-Accel-Buffering"), ngx_string("X-Accel-Charset"), ngx_null_string }; #if (NGX_HTTP_CACHE) static ngx_keyval_t ngx_http_proxy_cache_headers[] = { { ngx_string("Host"), ngx_string("$proxy_host") }, { ngx_string("Connection"), ngx_string("close") }, { ngx_string("Keep-Alive"), ngx_string("") }, { ngx_string("Expect"), ngx_string("") }, { ngx_string("If-Modified-Since"), ngx_string("") }, { ngx_string("If-Unmodified-Since"), ngx_string("") }, { ngx_string("If-None-Match"), ngx_string("") }, { ngx_string("If-Match"), ngx_string("") }, { ngx_string("Range"), ngx_string("") }, { ngx_string("If-Range"), ngx_string("") }, { ngx_null_string, ngx_null_string } }; static ngx_str_t ngx_http_proxy_hide_cache_headers[] = { ngx_string("Date"), ngx_string("Server"), ngx_string("X-Pad"), ngx_string("X-Accel-Expires"), ngx_string("X-Accel-Redirect"), ngx_string("X-Accel-Limit-Rate"), ngx_string("X-Accel-Buffering"), ngx_string("X-Accel-Charset"), ngx_string("Set-Cookie"), ngx_string("P3P"), ngx_null_string }; #endif static ngx_http_variable_t ngx_http_proxy_vars[] = { { ngx_string("proxy_host"), NULL, ngx_http_proxy_host_variable, 0, NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 }, { ngx_string("proxy_port"), NULL, ngx_http_proxy_port_variable, 0, NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 }, { ngx_string("proxy_add_x_forwarded_for"), NULL, ngx_http_proxy_add_x_forwarded_for_variable, 0, NGX_HTTP_VAR_NOHASH, 0 }, #if 0 { ngx_string("proxy_add_via"), NULL, NULL, 0, NGX_HTTP_VAR_NOHASH, 0 }, #endif { ngx_string("proxy_internal_body_length"), NULL, ngx_http_proxy_internal_body_length_variable, 0, NGX_HTTP_VAR_NOHASH, 0 }, { ngx_null_string, NULL, NULL, 0, 0, 0 } }; static ngx_path_init_t ngx_http_proxy_temp_path = { ngx_string(NGX_HTTP_PROXY_TEMP_PATH), { 1, 2, 0 } }; static ngx_int_t ngx_http_proxy_handler(ngx_http_request_t *r) { ngx_int_t rc; ngx_http_upstream_t *u; ngx_http_proxy_ctx_t *ctx; ngx_http_proxy_loc_conf_t *plcf; if (ngx_http_upstream_create(r) != NGX_OK) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_proxy_ctx_t)); if (ctx == NULL) { return NGX_ERROR; } ngx_http_set_ctx(r, ctx, ngx_http_proxy_module); plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module); u = r->upstream; if (plcf->proxy_lengths == 0) { ctx->vars = plcf->vars; u->schema = plcf->vars.schema; #if (NGX_HTTP_SSL) u->ssl = (plcf->upstream.ssl != NULL); #endif } else { if (ngx_http_proxy_eval(r, ctx, plcf) != NGX_OK) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } } u->output.tag = (ngx_buf_tag_t) &ngx_http_proxy_module; u->conf = &plcf->upstream; #if (NGX_HTTP_CACHE) u->create_key = ngx_http_proxy_create_key; #endif u->create_request = ngx_http_proxy_create_request; u->reinit_request = ngx_http_proxy_reinit_request; u->process_header = ngx_http_proxy_process_status_line; u->abort_request = ngx_http_proxy_abort_request; u->finalize_request = ngx_http_proxy_finalize_request; r->state = 0; if (plcf->redirects) { u->rewrite_redirect = ngx_http_proxy_rewrite_redirect; } u->buffering = plcf->upstream.buffering; u->pipe = ngx_pcalloc(r->pool, sizeof(ngx_event_pipe_t)); if (u->pipe == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } u->pipe->input_filter = ngx_event_pipe_copy_input_filter; u->accel = 1; rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init); if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { return rc; } return NGX_DONE; } static ngx_int_t ngx_http_proxy_eval(ngx_http_request_t *r, ngx_http_proxy_ctx_t *ctx, ngx_http_proxy_loc_conf_t *plcf) { u_char *p; size_t add; u_short port; ngx_str_t proxy; ngx_url_t url; ngx_http_upstream_t *u; if (ngx_http_script_run(r, &proxy, plcf->proxy_lengths->elts, 0, plcf->proxy_values->elts) == NULL) { return NGX_ERROR; } if (ngx_strncasecmp(proxy.data, (u_char *) "http://", 7) == 0) { add = 7; port = 80; #if (NGX_HTTP_SSL) } else if (ngx_strncasecmp(proxy.data, (u_char *) "https://", 8) == 0) { add = 8; port = 443; r->upstream->ssl = 1; #endif } else { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "invalid URL prefix in \"%V\"", &proxy); return NGX_ERROR; } u = r->upstream; u->schema.len = add; u->schema.data = proxy.data; ngx_memzero(&url, sizeof(ngx_url_t)); url.url.len = proxy.len - add; url.url.data = proxy.data + add; url.default_port = port; url.uri_part = 1; url.no_resolve = 1; if (ngx_parse_url(r->pool, &url) != NGX_OK) { if (url.err) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "%s in upstream \"%V\"", url.err, &url.url); } return NGX_ERROR; } if (url.uri.len) { if (url.uri.data[0] == '?') { p = ngx_pnalloc(r->pool, url.uri.len + 1); if (p == NULL) { return NGX_ERROR; } *p++ = '/'; ngx_memcpy(p, url.uri.data, url.uri.len); url.uri.len++; url.uri.data = p - 1; } } else { url.uri = r->unparsed_uri; } ctx->vars.key_start = u->schema; ngx_http_proxy_set_vars(&url, &ctx->vars); u->resolved = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_resolved_t)); if (u->resolved == NULL) { return NGX_ERROR; } if (url.addrs && url.addrs[0].sockaddr) { u->resolved->sockaddr = url.addrs[0].sockaddr; u->resolved->socklen = url.addrs[0].socklen; u->resolved->naddrs = 1; u->resolved->host = url.addrs[0].name; } else { u->resolved->host = url.host; u->resolved->port = (in_port_t) (url.no_port ? port : url.port); u->resolved->no_port = url.no_port; } return NGX_OK; } #if (NGX_HTTP_CACHE) static ngx_int_t ngx_http_proxy_create_key(ngx_http_request_t *r) { size_t len, loc_len; u_char *p; uintptr_t escape; ngx_str_t *key; ngx_http_upstream_t *u; ngx_http_proxy_ctx_t *ctx; ngx_http_proxy_loc_conf_t *plcf; u = r->upstream; plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module); ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module); key = ngx_array_push(&r->cache->keys); if (key == NULL) { return NGX_ERROR; } if (plcf->cache_key.value.len) { if (ngx_http_complex_value(r, &plcf->cache_key, key) != NGX_OK) { return NGX_ERROR; } return NGX_OK; } *key = ctx->vars.key_start; key = ngx_array_push(&r->cache->keys); if (key == NULL) { return NGX_ERROR; } if (plcf->proxy_lengths) { *key = ctx->vars.uri; u->uri = ctx->vars.uri; return NGX_OK; } else if (ctx->vars.uri.len == 0 && r->valid_unparsed_uri && r == r->main) { *key = r->unparsed_uri; u->uri = r->unparsed_uri; return NGX_OK; } loc_len = (r->valid_location && ctx->vars.uri.len) ? plcf->location.len : 0; if (r->quoted_uri || r->internal) { escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len, r->uri.len - loc_len, NGX_ESCAPE_URI); } else { escape = 0; } len = ctx->vars.uri.len + r->uri.len - loc_len + escape + sizeof("?") - 1 + r->args.len; p = ngx_pnalloc(r->pool, len); if (p == NULL) { return NGX_ERROR; } key->data = p; if (r->valid_location) { p = ngx_copy(p, ctx->vars.uri.data, ctx->vars.uri.len); } if (escape) { ngx_escape_uri(p, r->uri.data + loc_len, r->uri.len - loc_len, NGX_ESCAPE_URI); p += r->uri.len - loc_len + escape; } else { p = ngx_copy(p, r->uri.data + loc_len, r->uri.len - loc_len); } if (r->args.len > 0) { *p++ = '?'; p = ngx_copy(p, r->args.data, r->args.len); } key->len = p - key->data; u->uri = *key; return NGX_OK; } #endif static ngx_int_t ngx_http_proxy_create_request(ngx_http_request_t *r) { size_t len, uri_len, loc_len, body_len; uintptr_t escape; ngx_buf_t *b; ngx_str_t method; ngx_uint_t i, unparsed_uri; ngx_chain_t *cl, *body; ngx_list_part_t *part; ngx_table_elt_t *header; ngx_http_upstream_t *u; ngx_http_proxy_ctx_t *ctx; ngx_http_script_code_pt code; ngx_http_script_engine_t e, le; ngx_http_proxy_loc_conf_t *plcf; ngx_http_script_len_code_pt lcode; u = r->upstream; plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module); if (u->method.len) { /* HEAD was changed to GET to cache response */ method = u->method; method.len++; } else if (plcf->method.len) { method = plcf->method; } else { method = r->method_name; method.len++; } len = method.len + sizeof(ngx_http_proxy_version) - 1 + sizeof(CRLF) - 1; escape = 0; loc_len = 0; unparsed_uri = 0; ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module); if (plcf->proxy_lengths) { uri_len = ctx->vars.uri.len; } else if (ctx->vars.uri.len == 0 && r->valid_unparsed_uri && r == r->main) { unparsed_uri = 1; uri_len = r->unparsed_uri.len; } else { loc_len = (r->valid_location && ctx->vars.uri.len) ? plcf->location.len : 0; if (r->quoted_uri || r->internal) { escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len, r->uri.len - loc_len, NGX_ESCAPE_URI); } uri_len = ctx->vars.uri.len + r->uri.len - loc_len + escape + sizeof("?") - 1 + r->args.len; } if (uri_len == 0) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "zero length URI to proxy"); return NGX_ERROR; } len += uri_len; ngx_http_script_flush_no_cacheable_variables(r, plcf->flushes); if (plcf->body_set_len) { le.ip = plcf->body_set_len->elts; le.request = r; le.flushed = 1; body_len = 0; while (*(uintptr_t *) le.ip) { lcode = *(ngx_http_script_len_code_pt *) le.ip; body_len += lcode(&le); } ctx->internal_body_length = body_len; len += body_len; } le.ip = plcf->headers_set_len->elts; le.request = r; le.flushed = 1; while (*(uintptr_t *) le.ip) { while (*(uintptr_t *) le.ip) { lcode = *(ngx_http_script_len_code_pt *) le.ip; len += lcode(&le); } le.ip += sizeof(uintptr_t); } if (plcf->upstream.pass_request_headers) { 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; } if (ngx_hash_find(&plcf->headers_set_hash, header[i].hash, header[i].lowcase_key, header[i].key.len)) { continue; } len += header[i].key.len + sizeof(": ") - 1 + header[i].value.len + sizeof(CRLF) - 1; } } b = ngx_create_temp_buf(r->pool, len); if (b == NULL) { return NGX_ERROR; } cl = ngx_alloc_chain_link(r->pool); if (cl == NULL) { return NGX_ERROR; } cl->buf = b; /* the request line */ b->last = ngx_copy(b->last, method.data, method.len); u->uri.data = b->last; if (plcf->proxy_lengths) { b->last = ngx_copy(b->last, ctx->vars.uri.data, ctx->vars.uri.len); } else if (unparsed_uri) { b->last = ngx_copy(b->last, r->unparsed_uri.data, r->unparsed_uri.len); } else { if (r->valid_location) { b->last = ngx_copy(b->last, ctx->vars.uri.data, ctx->vars.uri.len); } if (escape) { ngx_escape_uri(b->last, r->uri.data + loc_len, r->uri.len - loc_len, NGX_ESCAPE_URI); b->last += r->uri.len - loc_len + escape; } else { b->last = ngx_copy(b->last, r->uri.data + loc_len, r->uri.len - loc_len); } if (r->args.len > 0) { *b->last++ = '?'; b->last = ngx_copy(b->last, r->args.data, r->args.len); } } u->uri.len = b->last - u->uri.data; b->last = ngx_cpymem(b->last, ngx_http_proxy_version, sizeof(ngx_http_proxy_version) - 1); ngx_memzero(&e, sizeof(ngx_http_script_engine_t)); e.ip = plcf->headers_set->elts; e.pos = b->last; e.request = r; e.flushed = 1; le.ip = plcf->headers_set_len->elts; while (*(uintptr_t *) le.ip) { lcode = *(ngx_http_script_len_code_pt *) le.ip; /* skip the header line name length */ (void) lcode(&le); if (*(ngx_http_script_len_code_pt *) le.ip) { for (len = 0; *(uintptr_t *) le.ip; len += lcode(&le)) { lcode = *(ngx_http_script_len_code_pt *) le.ip; } e.skip = (len == sizeof(CRLF) - 1) ? 1 : 0; } else { e.skip = 0; } le.ip += sizeof(uintptr_t); while (*(uintptr_t *) e.ip) { code = *(ngx_http_script_code_pt *) e.ip; code((ngx_http_script_engine_t *) &e); } e.ip += sizeof(uintptr_t); } b->last = e.pos; if (plcf->upstream.pass_request_headers) { 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; } if (ngx_hash_find(&plcf->headers_set_hash, header[i].hash, header[i].lowcase_key, header[i].key.len)) { continue; } b->last = ngx_copy(b->last, header[i].key.data, header[i].key.len); *b->last++ = ':'; *b->last++ = ' '; b->last = ngx_copy(b->last, header[i].value.data, header[i].value.len); *b->last++ = CR; *b->last++ = LF; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http proxy header: \"%V: %V\"", &header[i].key, &header[i].value); } } /* add "\r\n" at the header end */ *b->last++ = CR; *b->last++ = LF; if (plcf->body_set) { e.ip = plcf->body_set->elts; e.pos = b->last; while (*(uintptr_t *) e.ip) { code = *(ngx_http_script_code_pt *) e.ip; code((ngx_http_script_engine_t *) &e); } b->last = e.pos; } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http proxy header:\n\"%*s\"", (size_t) (b->last - b->pos), b->pos); if (plcf->body_set == NULL && plcf->upstream.pass_request_body) { body = u->request_bufs; u->request_bufs = cl; while (body) { b = ngx_alloc_buf(r->pool); if (b == NULL) { return NGX_ERROR; } ngx_memcpy(b, body->buf, sizeof(ngx_buf_t)); cl->next = ngx_alloc_chain_link(r->pool); if (cl->next == NULL) { return NGX_ERROR; } cl = cl->next; cl->buf = b; body = body->next; } b->flush = 1; } else { u->request_bufs = cl; } cl->next = NULL; return NGX_OK; } static ngx_int_t ngx_http_proxy_reinit_request(ngx_http_request_t *r) { ngx_http_proxy_ctx_t *ctx; ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module); if (ctx == NULL) { return NGX_OK; } ctx->status = 0; ctx->status_count = 0; ctx->status_start = NULL; ctx->status_end = NULL; r->upstream->process_header = ngx_http_proxy_process_status_line; r->state = 0; return NGX_OK; } static ngx_int_t ngx_http_proxy_process_status_line(ngx_http_request_t *r) { ngx_int_t rc; ngx_http_upstream_t *u; ngx_http_proxy_ctx_t *ctx; ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module); if (ctx == NULL) { return NGX_ERROR; } rc = ngx_http_proxy_parse_status_line(r, ctx); if (rc == NGX_AGAIN) { return rc; } u = r->upstream; if (rc == NGX_HTTP_PROXY_PARSE_NO_HEADER) { #if (NGX_HTTP_CACHE) if (r->cache) { r->http_version = NGX_HTTP_VERSION_9; return NGX_OK; } #endif ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "upstream sent no valid HTTP/1.0 header"); #if 0 if (u->accel) { return NGX_HTTP_UPSTREAM_INVALID_HEADER; } #endif r->http_version = NGX_HTTP_VERSION_9; u->state->status = NGX_HTTP_OK; return NGX_OK; } if (u->state) { u->state->status = ctx->status; } u->headers_in.status_n = ctx->status; u->headers_in.status_line.len = ctx->status_end - ctx->status_start; u->headers_in.status_line.data = ngx_pnalloc(r->pool, u->headers_in.status_line.len); if (u->headers_in.status_line.data == NULL) { return NGX_ERROR; } ngx_memcpy(u->headers_in.status_line.data, ctx->status_start, u->headers_in.status_line.len); ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http proxy status %ui \"%V\"", u->headers_in.status_n, &u->headers_in.status_line); u->process_header = ngx_http_proxy_process_header; return ngx_http_proxy_process_header(r); } static ngx_int_t ngx_http_proxy_parse_status_line(ngx_http_request_t *r, ngx_http_proxy_ctx_t *ctx) { u_char ch; u_char *p; ngx_http_upstream_t *u; enum { sw_start = 0, sw_H, sw_HT, sw_HTT, sw_HTTP, sw_first_major_digit, sw_major_digit, sw_first_minor_digit, sw_minor_digit, sw_status, sw_space_after_status, sw_status_text, sw_almost_done } state; u = r->upstream; state = r->state; for (p = u->buffer.pos; p < u->buffer.last; p++) { ch = *p; switch (state) { /* "HTTP/" */ case sw_start: switch (ch) { case 'H': state = sw_H; break; default: return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; case sw_H: switch (ch) { case 'T': state = sw_HT; break; default: return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; case sw_HT: switch (ch) { case 'T': state = sw_HTT; break; default: return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; case sw_HTT: switch (ch) { case 'P': state = sw_HTTP; break; default: return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; case sw_HTTP: switch (ch) { case '/': state = sw_first_major_digit; break; default: return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; /* the first digit of major HTTP version */ case sw_first_major_digit: if (ch < '1' || ch > '9') { return NGX_HTTP_PROXY_PARSE_NO_HEADER; } state = sw_major_digit; break; /* the major HTTP version or dot */ case sw_major_digit: if (ch == '.') { state = sw_first_minor_digit; break; } if (ch < '0' || ch > '9') { return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; /* the first digit of minor HTTP version */ case sw_first_minor_digit: if (ch < '0' || ch > '9') { return NGX_HTTP_PROXY_PARSE_NO_HEADER; } state = sw_minor_digit; break; /* the minor HTTP version or the end of the request line */ case sw_minor_digit: if (ch == ' ') { state = sw_status; break; } if (ch < '0' || ch > '9') { return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; /* HTTP status code */ case sw_status: if (ch == ' ') { break; } if (ch < '0' || ch > '9') { return NGX_HTTP_PROXY_PARSE_NO_HEADER; } ctx->status = ctx->status * 10 + ch - '0'; if (++ctx->status_count == 3) { state = sw_space_after_status; ctx->status_start = p - 2; } break; /* space or end of line */ case sw_space_after_status: switch (ch) { case ' ': state = sw_status_text; break; case '.': /* IIS may send 403.1, 403.2, etc */ state = sw_status_text; break; case CR: state = sw_almost_done; break; case LF: goto done; default: return NGX_HTTP_PROXY_PARSE_NO_HEADER; } break; /* any text until end of line */ case sw_status_text: switch (ch) { case CR: state = sw_almost_done; break; case LF: goto done; } break; /* end of status line */ case sw_almost_done: ctx->status_end = p - 1; switch (ch) { case LF: goto done; default: return NGX_HTTP_PROXY_PARSE_NO_HEADER; } } } u->buffer.pos = p; r->state = state; return NGX_AGAIN; done: u->buffer.pos = p + 1; if (ctx->status_end == NULL) { ctx->status_end = p; } r->state = sw_start; return NGX_OK; } static ngx_int_t ngx_http_proxy_process_header(ngx_http_request_t *r) { ngx_int_t rc; ngx_table_elt_t *h; ngx_http_upstream_header_t *hh; ngx_http_upstream_main_conf_t *umcf; umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module); for ( ;; ) { rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1); if (rc == NGX_OK) { /* a header line has been parsed successfully */ h = ngx_list_push(&r->upstream->headers_in.headers); if (h == NULL) { return NGX_ERROR; } h->hash = r->header_hash; h->key.len = r->header_name_end - r->header_name_start; h->value.len = r->header_end - r->header_start; h->key.data = ngx_pnalloc(r->pool, h->key.len + 1 + h->value.len + 1 + h->key.len); if (h->key.data == NULL) { return NGX_ERROR; } h->value.data = h->key.data + h->key.len + 1; h->lowcase_key = h->key.data + h->key.len + 1 + h->value.len + 1; ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1); ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1); if (h->key.len == r->lowcase_index) { ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len); } else { ngx_strlow(h->lowcase_key, h->key.data, h->key.len); } hh = ngx_hash_find(&umcf->headers_in_hash, h->hash, h->lowcase_key, h->key.len); if (hh && hh->handler(r, h, hh->offset) != NGX_OK) { return NGX_ERROR; } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http proxy header: \"%V: %V\"", &h->key, &h->value); continue; } if (rc == NGX_HTTP_PARSE_HEADER_DONE) { /* a whole header has been parsed successfully */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http proxy header done"); /* * if no "Server" and "Date" in header line, * then add the special empty headers */ if (r->upstream->headers_in.server == NULL) { h = ngx_list_push(&r->upstream->headers_in.headers); if (h == NULL) { return NGX_ERROR; } h->hash = ngx_hash(ngx_hash(ngx_hash(ngx_hash( ngx_hash('s', 'e'), 'r'), 'v'), 'e'), 'r'); ngx_str_set(&h->key, "Server"); ngx_str_null(&h->value); h->lowcase_key = (u_char *) "server"; } if (r->upstream->headers_in.date == NULL) { h = ngx_list_push(&r->upstream->headers_in.headers); if (h == NULL) { return NGX_ERROR; } h->hash = ngx_hash(ngx_hash(ngx_hash('d', 'a'), 't'), 'e'); ngx_str_set(&h->key, "Date"); ngx_str_null(&h->value); h->lowcase_key = (u_char *) "date"; } return NGX_OK; } if (rc == NGX_AGAIN) { return NGX_AGAIN; } /* there was error while a header line parsing */ ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "upstream sent invalid header"); return NGX_HTTP_UPSTREAM_INVALID_HEADER; } } static void ngx_http_proxy_abort_request(ngx_http_request_t *r) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "abort http proxy request"); return; } static void ngx_http_proxy_finalize_request(ngx_http_request_t *r, ngx_int_t rc) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "finalize http proxy request"); return; } static ngx_int_t ngx_http_proxy_host_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_http_proxy_ctx_t *ctx; ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module); if (ctx == NULL) { v->not_found = 1; return NGX_OK; } v->len = ctx->vars.host_header.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = ctx->vars.host_header.data; return NGX_OK; } static ngx_int_t ngx_http_proxy_port_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_http_proxy_ctx_t *ctx; ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module); if (ctx == NULL) { v->not_found = 1; return NGX_OK; } v->len = ctx->vars.port.len; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = ctx->vars.port.data; return NGX_OK; } static ngx_int_t ngx_http_proxy_add_x_forwarded_for_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { u_char *p; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; if (r->headers_in.x_forwarded_for == NULL) { v->len = r->connection->addr_text.len; v->data = r->connection->addr_text.data; return NGX_OK; } v->len = r->headers_in.x_forwarded_for->value.len + sizeof(", ") - 1 + r->connection->addr_text.len; p = ngx_pnalloc(r->pool, v->len); if (p == NULL) { return NGX_ERROR; } v->data = p; p = ngx_copy(p, r->headers_in.x_forwarded_for->value.data, r->headers_in.x_forwarded_for->value.len); *p++ = ','; *p++ = ' '; ngx_memcpy(p, r->connection->addr_text.data, r->connection->addr_text.len); return NGX_OK; } static ngx_int_t ngx_http_proxy_internal_body_length_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { ngx_http_proxy_ctx_t *ctx; ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module); if (ctx == NULL) { v->not_found = 1; return NGX_OK; } v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = ngx_pnalloc(r->connection->pool, NGX_SIZE_T_LEN); if (v->data == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(v->data, "%uz", ctx->internal_body_length) - v->data; return NGX_OK; } static ngx_int_t ngx_http_proxy_rewrite_redirect(ngx_http_request_t *r, ngx_table_elt_t *h, size_t prefix) { ngx_int_t rc; ngx_uint_t i; ngx_http_proxy_loc_conf_t *plcf; ngx_http_proxy_redirect_t *pr; plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module); pr = plcf->redirects->elts; if (pr == NULL) { return NGX_DECLINED; } for (i = 0; i < plcf->redirects->nelts; i++) { rc = pr[i].handler(r, h, prefix, &pr[i]); if (rc != NGX_DECLINED) { return rc; } } return NGX_DECLINED; } static ngx_int_t ngx_http_proxy_rewrite_redirect_text(ngx_http_request_t *r, ngx_table_elt_t *h, size_t prefix, ngx_http_proxy_redirect_t *pr) { size_t len; u_char *data, *p; if (pr->redirect.len > h->value.len - prefix || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data, pr->redirect.len) != 0) { return NGX_DECLINED; } len = prefix + pr->replacement.text.len + h->value.len - pr->redirect.len; data = ngx_pnalloc(r->pool, len); if (data == NULL) { return NGX_ERROR; } p = data; p = ngx_copy(p, h->value.data, prefix); if (pr->replacement.text.len) { p = ngx_copy(p, pr->replacement.text.data, pr->replacement.text.len); } ngx_memcpy(p, h->value.data + prefix + pr->redirect.len, h->value.len - pr->redirect.len - prefix); h->value.len = len; h->value.data = data; return NGX_OK; } static ngx_int_t ngx_http_proxy_rewrite_redirect_vars(ngx_http_request_t *r, ngx_table_elt_t *h, size_t prefix, ngx_http_proxy_redirect_t *pr) { size_t len; u_char *data, *p; ngx_http_script_code_pt code; ngx_http_script_engine_t e; ngx_http_script_len_code_pt lcode; if (pr->redirect.len > h->value.len - prefix || ngx_rstrncmp(h->value.data + prefix, pr->redirect.data, pr->redirect.len) != 0) { return NGX_DECLINED; } ngx_memzero(&e, sizeof(ngx_http_script_engine_t)); e.ip = pr->replacement.vars.lengths; e.request = r; len = prefix + h->value.len - pr->redirect.len; while (*(uintptr_t *) e.ip) { lcode = *(ngx_http_script_len_code_pt *) e.ip; len += lcode(&e); } data = ngx_pnalloc(r->pool, len); if (data == NULL) { return NGX_ERROR; } p = data; p = ngx_copy(p, h->value.data, prefix); e.ip = pr->replacement.vars.values; e.pos = p; while (*(uintptr_t *) e.ip) { code = *(ngx_http_script_code_pt *) e.ip; code(&e); } ngx_memcpy(e.pos, h->value.data + prefix + pr->redirect.len, h->value.len - pr->redirect.len - prefix); h->value.len = len; h->value.data = data; return NGX_OK; } static ngx_int_t ngx_http_proxy_add_variables(ngx_conf_t *cf) { ngx_http_variable_t *var, *v; for (v = ngx_http_proxy_vars; v->name.len; v++) { var = ngx_http_add_variable(cf, &v->name, v->flags); if (var == NULL) { return NGX_ERROR; } var->get_handler = v->get_handler; var->data = v->data; } return NGX_OK; } static void * ngx_http_proxy_create_loc_conf(ngx_conf_t *cf) { ngx_http_proxy_loc_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_proxy_loc_conf_t)); if (conf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * conf->upstream.bufs.num = 0; * conf->upstream.ignore_headers = 0; * conf->upstream.next_upstream = 0; * conf->upstream.cache_use_stale = 0; * conf->upstream.cache_methods = 0; * conf->upstream.temp_path = NULL; * conf->upstream.hide_headers_hash = { NULL, 0 }; * conf->upstream.uri = { 0, NULL }; * conf->upstream.location = NULL; * conf->upstream.store_lengths = NULL; * conf->upstream.store_values = NULL; * * conf->method = NULL; * conf->headers_source = NULL; * conf->headers_set_len = NULL; * conf->headers_set = NULL; * conf->headers_set_hash = NULL; * conf->body_set_len = NULL; * conf->body_set = NULL; * conf->body_source = { 0, NULL }; * conf->redirects = NULL; */ conf->upstream.store = NGX_CONF_UNSET; conf->upstream.store_access = NGX_CONF_UNSET_UINT; conf->upstream.buffering = NGX_CONF_UNSET; conf->upstream.ignore_client_abort = NGX_CONF_UNSET; conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC; conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC; conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC; conf->upstream.send_lowat = NGX_CONF_UNSET_SIZE; conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE; conf->upstream.busy_buffers_size_conf = NGX_CONF_UNSET_SIZE; conf->upstream.max_temp_file_size_conf = NGX_CONF_UNSET_SIZE; conf->upstream.temp_file_write_size_conf = NGX_CONF_UNSET_SIZE; conf->upstream.pass_request_headers = NGX_CONF_UNSET; conf->upstream.pass_request_body = NGX_CONF_UNSET; #if (NGX_HTTP_CACHE) conf->upstream.cache = NGX_CONF_UNSET_PTR; conf->upstream.cache_min_uses = NGX_CONF_UNSET_UINT; conf->upstream.cache_valid = NGX_CONF_UNSET_PTR; #endif conf->upstream.hide_headers = NGX_CONF_UNSET_PTR; conf->upstream.pass_headers = NGX_CONF_UNSET_PTR; conf->upstream.intercept_errors = NGX_CONF_UNSET; #if (NGX_HTTP_SSL) conf->upstream.ssl_session_reuse = NGX_CONF_UNSET; #endif /* "proxy_cyclic_temp_file" is disabled */ conf->upstream.cyclic_temp_file = 0; conf->redirect = NGX_CONF_UNSET; conf->upstream.change_buffering = 1; conf->headers_hash_max_size = NGX_CONF_UNSET_UINT; conf->headers_hash_bucket_size = NGX_CONF_UNSET_UINT; return conf; } static char * ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_proxy_loc_conf_t *prev = parent; ngx_http_proxy_loc_conf_t *conf = child; size_t size; ngx_str_t *h; ngx_keyval_t *s; ngx_hash_init_t hash; ngx_http_proxy_redirect_t *pr; ngx_http_script_compile_t sc; if (conf->upstream.store != 0) { ngx_conf_merge_value(conf->upstream.store, prev->upstream.store, 0); if (conf->upstream.store_lengths == NULL) { conf->upstream.store_lengths = prev->upstream.store_lengths; conf->upstream.store_values = prev->upstream.store_values; } } ngx_conf_merge_uint_value(conf->upstream.store_access, prev->upstream.store_access, 0600); ngx_conf_merge_value(conf->upstream.buffering, prev->upstream.buffering, 1); ngx_conf_merge_value(conf->upstream.ignore_client_abort, prev->upstream.ignore_client_abort, 0); ngx_conf_merge_msec_value(conf->upstream.connect_timeout, prev->upstream.connect_timeout, 60000); ngx_conf_merge_msec_value(conf->upstream.send_timeout, prev->upstream.send_timeout, 60000); ngx_conf_merge_msec_value(conf->upstream.read_timeout, prev->upstream.read_timeout, 60000); ngx_conf_merge_size_value(conf->upstream.send_lowat, prev->upstream.send_lowat, 0); ngx_conf_merge_size_value(conf->upstream.buffer_size, prev->upstream.buffer_size, (size_t) ngx_pagesize); ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs, 8, ngx_pagesize); if (conf->upstream.bufs.num < 2) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "there must be at least 2 \"proxy_buffers\""); return NGX_CONF_ERROR; } size = conf->upstream.buffer_size; if (size < conf->upstream.bufs.size) { size = conf->upstream.bufs.size; } ngx_conf_merge_size_value(conf->upstream.busy_buffers_size_conf, prev->upstream.busy_buffers_size_conf, NGX_CONF_UNSET_SIZE); if (conf->upstream.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) { conf->upstream.busy_buffers_size = 2 * size; } else { conf->upstream.busy_buffers_size = conf->upstream.busy_buffers_size_conf; } if (conf->upstream.busy_buffers_size < size) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_busy_buffers_size\" must be equal or bigger than " "maximum of the value of \"proxy_buffer_size\" and " "one of the \"proxy_buffers\""); return NGX_CONF_ERROR; } if (conf->upstream.busy_buffers_size > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_busy_buffers_size\" must be less than " "the size of all \"proxy_buffers\" minus one buffer"); return NGX_CONF_ERROR; } ngx_conf_merge_size_value(conf->upstream.temp_file_write_size_conf, prev->upstream.temp_file_write_size_conf, NGX_CONF_UNSET_SIZE); if (conf->upstream.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) { conf->upstream.temp_file_write_size = 2 * size; } else { conf->upstream.temp_file_write_size = conf->upstream.temp_file_write_size_conf; } if (conf->upstream.temp_file_write_size < size) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_temp_file_write_size\" must be equal or bigger than " "maximum of the value of \"proxy_buffer_size\" and " "one of the \"proxy_buffers\""); return NGX_CONF_ERROR; } ngx_conf_merge_size_value(conf->upstream.max_temp_file_size_conf, prev->upstream.max_temp_file_size_conf, NGX_CONF_UNSET_SIZE); if (conf->upstream.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) { conf->upstream.max_temp_file_size = 1024 * 1024 * 1024; } else { conf->upstream.max_temp_file_size = conf->upstream.max_temp_file_size_conf; } if (conf->upstream.max_temp_file_size != 0 && conf->upstream.max_temp_file_size < size) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_max_temp_file_size\" must be equal to zero to disable " "the temporary files usage or must be equal or bigger than " "maximum of the value of \"proxy_buffer_size\" and " "one of the \"proxy_buffers\""); return NGX_CONF_ERROR; } ngx_conf_merge_bitmask_value(conf->upstream.ignore_headers, prev->upstream.ignore_headers, NGX_CONF_BITMASK_SET); ngx_conf_merge_bitmask_value(conf->upstream.next_upstream, prev->upstream.next_upstream, (NGX_CONF_BITMASK_SET |NGX_HTTP_UPSTREAM_FT_ERROR |NGX_HTTP_UPSTREAM_FT_TIMEOUT)); if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) { conf->upstream.next_upstream = NGX_CONF_BITMASK_SET |NGX_HTTP_UPSTREAM_FT_OFF; } if (ngx_conf_merge_path_value(cf, &conf->upstream.temp_path, prev->upstream.temp_path, &ngx_http_proxy_temp_path) != NGX_OK) { return NGX_CONF_ERROR; } #if (NGX_HTTP_CACHE) ngx_conf_merge_ptr_value(conf->upstream.cache, prev->upstream.cache, NULL); if (conf->upstream.cache && conf->upstream.cache->data == NULL) { ngx_shm_zone_t *shm_zone; shm_zone = conf->upstream.cache; ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_cache\" zone \"%V\" is unknown", &shm_zone->shm.name); return NGX_CONF_ERROR; } ngx_conf_merge_uint_value(conf->upstream.cache_min_uses, prev->upstream.cache_min_uses, 1); ngx_conf_merge_bitmask_value(conf->upstream.cache_use_stale, prev->upstream.cache_use_stale, (NGX_CONF_BITMASK_SET |NGX_HTTP_UPSTREAM_FT_OFF)); if (conf->upstream.cache_methods == 0) { conf->upstream.cache_methods = prev->upstream.cache_methods; } conf->upstream.cache_methods |= NGX_HTTP_GET|NGX_HTTP_HEAD; if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) { conf->upstream.cache_use_stale = NGX_CONF_BITMASK_SET |NGX_HTTP_UPSTREAM_FT_OFF; } ngx_conf_merge_ptr_value(conf->upstream.cache_valid, prev->upstream.cache_valid, NULL); if (conf->cache_key.value.data == NULL) { conf->cache_key = prev->cache_key; } #endif if (conf->method.len == 0) { conf->method = prev->method; } else { conf->method.data[conf->method.len] = ' '; conf->method.len++; } ngx_conf_merge_value(conf->upstream.pass_request_headers, prev->upstream.pass_request_headers, 1); ngx_conf_merge_value(conf->upstream.pass_request_body, prev->upstream.pass_request_body, 1); ngx_conf_merge_value(conf->upstream.intercept_errors, prev->upstream.intercept_errors, 0); #if (NGX_HTTP_SSL) ngx_conf_merge_value(conf->upstream.ssl_session_reuse, prev->upstream.ssl_session_reuse, 1); #endif ngx_conf_merge_value(conf->redirect, prev->redirect, 1); if (conf->redirect) { if (conf->redirects == NULL) { conf->redirects = prev->redirects; } if (conf->redirects == NULL && conf->url.data) { conf->redirects = ngx_array_create(cf->pool, 1, sizeof(ngx_http_proxy_redirect_t)); if (conf->redirects == NULL) { return NGX_CONF_ERROR; } pr = ngx_array_push(conf->redirects); if (pr == NULL) { return NGX_CONF_ERROR; } pr->handler = ngx_http_proxy_rewrite_redirect_text; pr->redirect = conf->url; if (conf->vars.uri.len) { pr->replacement.text = conf->location; } else { ngx_str_null(&pr->replacement.text); } } } /* STUB */ if (prev->proxy_lengths) { conf->proxy_lengths = prev->proxy_lengths; conf->proxy_values = prev->proxy_values; } #if (NGX_HTTP_SSL) if (conf->upstream.ssl == NULL) { conf->upstream.ssl = prev->upstream.ssl; } #endif ngx_conf_merge_uint_value(conf->headers_hash_max_size, prev->headers_hash_max_size, 512); ngx_conf_merge_uint_value(conf->headers_hash_bucket_size, prev->headers_hash_bucket_size, 64); conf->headers_hash_bucket_size = ngx_align(conf->headers_hash_bucket_size, ngx_cacheline_size); hash.max_size = conf->headers_hash_max_size; hash.bucket_size = conf->headers_hash_bucket_size; hash.name = "proxy_headers_hash"; #if (NGX_HTTP_CACHE) h = conf->upstream.cache ? ngx_http_proxy_hide_cache_headers: ngx_http_proxy_hide_headers; #else h = ngx_http_proxy_hide_headers; #endif if (ngx_http_upstream_hide_headers_hash(cf, &conf->upstream, &prev->upstream, h, &hash) != NGX_OK) { return NGX_CONF_ERROR; } if (conf->upstream.upstream == NULL) { conf->upstream.upstream = prev->upstream.upstream; conf->vars = prev->vars; } if (conf->body_source.data == NULL) { conf->body_source = prev->body_source; conf->body_set_len = prev->body_set_len; conf->body_set = prev->body_set; } if (conf->body_source.data && conf->body_set_len == NULL) { ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); sc.cf = cf; sc.source = &conf->body_source; sc.flushes = &conf->flushes; sc.lengths = &conf->body_set_len; sc.values = &conf->body_set; sc.complete_lengths = 1; sc.complete_values = 1; if (ngx_http_script_compile(&sc) != NGX_OK) { return NGX_CONF_ERROR; } if (conf->headers_source == NULL) { conf->headers_source = ngx_array_create(cf->pool, 4, sizeof(ngx_keyval_t)); if (conf->headers_source == NULL) { return NGX_CONF_ERROR; } } s = ngx_array_push(conf->headers_source); if (s == NULL) { return NGX_CONF_ERROR; } ngx_str_set(&s->key, "Content-Length"); ngx_str_set(&s->value, "$proxy_internal_body_length"); } if (ngx_http_proxy_merge_headers(cf, conf, prev) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } static ngx_int_t ngx_http_proxy_merge_headers(ngx_conf_t *cf, ngx_http_proxy_loc_conf_t *conf, ngx_http_proxy_loc_conf_t *prev) { u_char *p; size_t size; uintptr_t *code; ngx_uint_t i; ngx_keyval_t *src, *s, *h; ngx_hash_key_t *hk; ngx_hash_init_t hash; ngx_http_script_compile_t sc; ngx_http_script_copy_code_t *copy; if (conf->headers_source == NULL) { conf->flushes = prev->flushes; conf->headers_set_len = prev->headers_set_len; conf->headers_set = prev->headers_set; conf->headers_set_hash = prev->headers_set_hash; conf->headers_source = prev->headers_source; } if (conf->headers_set_hash.buckets #if (NGX_HTTP_CACHE) && ((conf->upstream.cache == NULL) == (prev->upstream.cache == NULL)) #endif ) { return NGX_OK; } conf->headers_names = ngx_array_create(cf->pool, 4, sizeof(ngx_hash_key_t)); if (conf->headers_names == NULL) { return NGX_ERROR; } if (conf->headers_source == NULL) { conf->headers_source = ngx_array_create(cf->pool, 4, sizeof(ngx_keyval_t)); if (conf->headers_source == NULL) { return NGX_ERROR; } } conf->headers_set_len = ngx_array_create(cf->pool, 64, 1); if (conf->headers_set_len == NULL) { return NGX_ERROR; } conf->headers_set = ngx_array_create(cf->pool, 512, 1); if (conf->headers_set == NULL) { return NGX_ERROR; } src = conf->headers_source->elts; #if (NGX_HTTP_CACHE) h = conf->upstream.cache ? ngx_http_proxy_cache_headers: ngx_http_proxy_headers; #else h = ngx_http_proxy_headers; #endif while (h->key.len) { for (i = 0; i < conf->headers_source->nelts; i++) { if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) { goto next; } } s = ngx_array_push(conf->headers_source); if (s == NULL) { return NGX_ERROR; } *s = *h; src = conf->headers_source->elts; next: h++; } src = conf->headers_source->elts; for (i = 0; i < conf->headers_source->nelts; i++) { hk = ngx_array_push(conf->headers_names); if (hk == NULL) { return NGX_ERROR; } hk->key = src[i].key; hk->key_hash = ngx_hash_key_lc(src[i].key.data, src[i].key.len); hk->value = (void *) 1; if (src[i].value.len == 0) { continue; } if (ngx_http_script_variables_count(&src[i].value) == 0) { copy = ngx_array_push_n(conf->headers_set_len, sizeof(ngx_http_script_copy_code_t)); if (copy == NULL) { return NGX_ERROR; } copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code; copy->len = src[i].key.len + sizeof(": ") - 1 + src[i].value.len + sizeof(CRLF) - 1; size = (sizeof(ngx_http_script_copy_code_t) + src[i].key.len + sizeof(": ") - 1 + src[i].value.len + sizeof(CRLF) - 1 + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1); copy = ngx_array_push_n(conf->headers_set, size); if (copy == NULL) { return NGX_ERROR; } copy->code = ngx_http_script_copy_code; copy->len = src[i].key.len + sizeof(": ") - 1 + src[i].value.len + sizeof(CRLF) - 1; p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t); p = ngx_cpymem(p, src[i].key.data, src[i].key.len); *p++ = ':'; *p++ = ' '; p = ngx_cpymem(p, src[i].value.data, src[i].value.len); *p++ = CR; *p = LF; } else { copy = ngx_array_push_n(conf->headers_set_len, sizeof(ngx_http_script_copy_code_t)); if (copy == NULL) { return NGX_ERROR; } copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code; copy->len = src[i].key.len + sizeof(": ") - 1; size = (sizeof(ngx_http_script_copy_code_t) + src[i].key.len + sizeof(": ") - 1 + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1); copy = ngx_array_push_n(conf->headers_set, size); if (copy == NULL) { return NGX_ERROR; } copy->code = ngx_http_script_copy_code; copy->len = src[i].key.len + sizeof(": ") - 1; p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t); p = ngx_cpymem(p, src[i].key.data, src[i].key.len); *p++ = ':'; *p = ' '; ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); sc.cf = cf; sc.source = &src[i].value; sc.flushes = &conf->flushes; sc.lengths = &conf->headers_set_len; sc.values = &conf->headers_set; if (ngx_http_script_compile(&sc) != NGX_OK) { return NGX_ERROR; } copy = ngx_array_push_n(conf->headers_set_len, sizeof(ngx_http_script_copy_code_t)); if (copy == NULL) { return NGX_ERROR; } copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code; copy->len = sizeof(CRLF) - 1; size = (sizeof(ngx_http_script_copy_code_t) + sizeof(CRLF) - 1 + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1); copy = ngx_array_push_n(conf->headers_set, size); if (copy == NULL) { return NGX_ERROR; } copy->code = ngx_http_script_copy_code; copy->len = sizeof(CRLF) - 1; p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t); *p++ = CR; *p = LF; } code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t)); if (code == NULL) { return NGX_ERROR; } *code = (uintptr_t) NULL; code = ngx_array_push_n(conf->headers_set, sizeof(uintptr_t)); if (code == NULL) { return NGX_ERROR; } *code = (uintptr_t) NULL; } code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t)); if (code == NULL) { return NGX_ERROR; } *code = (uintptr_t) NULL; hash.hash = &conf->headers_set_hash; hash.key = ngx_hash_key_lc; hash.max_size = conf->headers_hash_max_size; hash.bucket_size = conf->headers_hash_bucket_size; hash.name = "proxy_headers_hash"; hash.pool = cf->pool; hash.temp_pool = NULL; if (ngx_hash_init(&hash, conf->headers_names->elts, conf->headers_names->nelts) != NGX_OK) { return NGX_ERROR; } return NGX_OK; } static char * ngx_http_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_proxy_loc_conf_t *plcf = conf; size_t add; u_short port; ngx_str_t *value, *url; ngx_url_t u; ngx_uint_t n; ngx_http_core_loc_conf_t *clcf; ngx_http_script_compile_t sc; if (plcf->upstream.upstream || plcf->proxy_lengths) { return "is duplicate"; } clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); clcf->handler = ngx_http_proxy_handler; if (clcf->name.data[clcf->name.len - 1] == '/') { clcf->auto_redirect = 1; } value = cf->args->elts; url = &value[1]; n = ngx_http_script_variables_count(url); if (n) { ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); sc.cf = cf; sc.source = url; sc.lengths = &plcf->proxy_lengths; sc.values = &plcf->proxy_values; sc.variables = n; sc.complete_lengths = 1; sc.complete_values = 1; if (ngx_http_script_compile(&sc) != NGX_OK) { return NGX_CONF_ERROR; } #if (NGX_HTTP_SSL) if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) { return NGX_CONF_ERROR; } #endif return NGX_CONF_OK; } if (ngx_strncasecmp(url->data, (u_char *) "http://", 7) == 0) { add = 7; port = 80; } else if (ngx_strncasecmp(url->data, (u_char *) "https://", 8) == 0) { #if (NGX_HTTP_SSL) if (ngx_http_proxy_set_ssl(cf, plcf) != NGX_OK) { return NGX_CONF_ERROR; } add = 8; port = 443; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "https protocol requires SSL support"); return NGX_CONF_ERROR; #endif } else { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid URL prefix"); return NGX_CONF_ERROR; } ngx_memzero(&u, sizeof(ngx_url_t)); u.url.len = url->len - add; u.url.data = url->data + add; u.default_port = port; u.uri_part = 1; u.no_resolve = 1; plcf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0); if (plcf->upstream.upstream == NULL) { return NGX_CONF_ERROR; } plcf->vars.schema.len = add; plcf->vars.schema.data = url->data; plcf->vars.key_start = plcf->vars.schema; ngx_http_proxy_set_vars(&u, &plcf->vars); plcf->location = clcf->name; if (clcf->named #if (NGX_PCRE) || clcf->regex #endif || clcf->noname) { if (plcf->vars.uri.len) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_pass\" may not have URI part in " "location given by regular expression, " "or inside named location, " "or inside the \"if\" statement, " "or inside the \"limit_except\" block"); return NGX_CONF_ERROR; } plcf->location.len = 0; } plcf->url = *url; return NGX_CONF_OK; } static char * ngx_http_proxy_redirect(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_proxy_loc_conf_t *plcf = conf; ngx_str_t *value; ngx_array_t *vars_lengths, *vars_values; ngx_http_script_compile_t sc; ngx_http_proxy_redirect_t *pr; if (plcf->redirect == 0) { return NGX_CONF_OK; } value = cf->args->elts; if (cf->args->nelts == 2) { if (ngx_strcmp(value[1].data, "off") == 0) { plcf->redirect = 0; plcf->redirects = NULL; return NGX_CONF_OK; } if (ngx_strcmp(value[1].data, "false") == 0) { ngx_conf_log_error(NGX_LOG_ERR, cf, 0, "invalid parameter \"false\", use \"off\" instead"); plcf->redirect = 0; plcf->redirects = NULL; return NGX_CONF_OK; } if (ngx_strcmp(value[1].data, "default") != 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"", &value[1]); return NGX_CONF_ERROR; } } if (plcf->redirects == NULL) { plcf->redirects = ngx_array_create(cf->pool, 1, sizeof(ngx_http_proxy_redirect_t)); if (plcf->redirects == NULL) { return NGX_CONF_ERROR; } } pr = ngx_array_push(plcf->redirects); if (pr == NULL) { return NGX_CONF_ERROR; } if (ngx_strcmp(value[1].data, "default") == 0) { if (plcf->proxy_lengths) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_redirect default\" may not be used " "with \"proxy_pass\" directive with variables"); return NGX_CONF_ERROR; } if (plcf->url.data == NULL) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_redirect default\" must go " "after the \"proxy_pass\" directive"); return NGX_CONF_ERROR; } pr->handler = ngx_http_proxy_rewrite_redirect_text; pr->redirect = plcf->url; if (plcf->vars.uri.len) { pr->replacement.text = plcf->location; } else { ngx_str_null(&pr->replacement.text); } return NGX_CONF_OK; } if (ngx_http_script_variables_count(&value[2]) == 0) { pr->handler = ngx_http_proxy_rewrite_redirect_text; pr->redirect = value[1]; pr->replacement.text = value[2]; return NGX_CONF_OK; } ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); vars_lengths = NULL; vars_values = NULL; sc.cf = cf; sc.source = &value[2]; sc.lengths = &vars_lengths; sc.values = &vars_values; sc.complete_lengths = 1; sc.complete_values = 1; if (ngx_http_script_compile(&sc) != NGX_OK) { return NGX_CONF_ERROR; } pr->handler = ngx_http_proxy_rewrite_redirect_vars; pr->redirect = value[1]; pr->replacement.vars.lengths = vars_lengths->elts; pr->replacement.vars.values = vars_values->elts; return NGX_CONF_OK; } static char * ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_proxy_loc_conf_t *plcf = conf; ngx_str_t *value; ngx_http_script_compile_t sc; if (plcf->upstream.store != NGX_CONF_UNSET || plcf->upstream.store_lengths) { return "is duplicate"; } value = cf->args->elts; if (ngx_strcmp(value[1].data, "off") == 0) { plcf->upstream.store = 0; return NGX_CONF_OK; } #if (NGX_HTTP_CACHE) if (plcf->upstream.cache != NGX_CONF_UNSET_PTR && plcf->upstream.cache != NULL) { return "is incompatible with \"proxy_cache\""; } #endif if (ngx_strcmp(value[1].data, "on") == 0) { plcf->upstream.store = 1; return NGX_CONF_OK; } /* include the terminating '\0' into script */ value[1].len++; ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); sc.cf = cf; sc.source = &value[1]; sc.lengths = &plcf->upstream.store_lengths; sc.values = &plcf->upstream.store_values; sc.variables = ngx_http_script_variables_count(&value[1]); sc.complete_lengths = 1; sc.complete_values = 1; if (ngx_http_script_compile(&sc) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } #if (NGX_HTTP_CACHE) static char * ngx_http_proxy_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_proxy_loc_conf_t *plcf = conf; ngx_str_t *value; value = cf->args->elts; if (plcf->upstream.cache != NGX_CONF_UNSET_PTR) { return "is duplicate"; } if (ngx_strcmp(value[1].data, "off") == 0) { plcf->upstream.cache = NULL; return NGX_CONF_OK; } if (plcf->upstream.store > 0 || plcf->upstream.store_lengths) { return "is incompatible with \"proxy_store\""; } plcf->upstream.cache = ngx_shared_memory_add(cf, &value[1], 0, &ngx_http_proxy_module); if (plcf->upstream.cache == NULL) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_http_proxy_cache_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_proxy_loc_conf_t *plcf = conf; ngx_str_t *value; ngx_http_compile_complex_value_t ccv; value = cf->args->elts; if (plcf->cache_key.value.len) { return "is duplicate"; } ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); ccv.cf = cf; ccv.value = &value[1]; ccv.complex_value = &plcf->cache_key; if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } #endif static char * ngx_http_proxy_lowat_check(ngx_conf_t *cf, void *post, void *data) { #if (NGX_FREEBSD) ssize_t *np = data; if ((u_long) *np >= ngx_freebsd_net_inet_tcp_sendspace) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_send_lowat\" must be less than %d " "(sysctl net.inet.tcp.sendspace)", ngx_freebsd_net_inet_tcp_sendspace); return NGX_CONF_ERROR; } #elif !(NGX_HAVE_SO_SNDLOWAT) ssize_t *np = data; ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "\"proxy_send_lowat\" is not supported, ignored"); *np = 0; #endif return NGX_CONF_OK; } static char * ngx_http_proxy_upstream_max_fails_unsupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_upstream_max_fails\" is not supported, " "use the \"max_fails\" parameter of the \"server\" directive ", "inside the \"upstream\" block"); return NGX_CONF_ERROR; } static char * ngx_http_proxy_upstream_fail_timeout_unsupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"proxy_upstream_fail_timeout\" is not supported, " "use the \"fail_timeout\" parameter of the \"server\" directive ", "inside the \"upstream\" block"); return NGX_CONF_ERROR; } #if (NGX_HTTP_SSL) static ngx_int_t ngx_http_proxy_set_ssl(ngx_conf_t *cf, ngx_http_proxy_loc_conf_t *plcf) { ngx_pool_cleanup_t *cln; plcf->upstream.ssl = ngx_pcalloc(cf->pool, sizeof(ngx_ssl_t)); if (plcf->upstream.ssl == NULL) { return NGX_ERROR; } plcf->upstream.ssl->log = cf->log; if (ngx_ssl_create(plcf->upstream.ssl, NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1, NULL) != NGX_OK) { return NGX_ERROR; } cln = ngx_pool_cleanup_add(cf->pool, 0); if (cln == NULL) { return NGX_ERROR; } cln->handler = ngx_ssl_cleanup_ctx; cln->data = plcf->upstream.ssl; return NGX_OK; } #endif static void ngx_http_proxy_set_vars(ngx_url_t *u, ngx_http_proxy_vars_t *v) { if (u->family != AF_UNIX) { if (u->no_port || u->port == u->default_port) { v->host_header = u->host; if (u->default_port == 80) { ngx_str_set(&v->port, "80"); } else { ngx_str_set(&v->port, "443"); } } else { v->host_header.len = u->host.len + 1 + u->port_text.len; v->host_header.data = u->host.data; v->port = u->port_text; } v->key_start.len += v->host_header.len; } else { ngx_str_set(&v->host_header, "localhost"); ngx_str_null(&v->port); v->key_start.len += sizeof("unix:") - 1 + u->host.len + 1; } v->uri = u->uri; }