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0be9554bda
nginx/src/http/modules/ngx_http_proxy_module.c
Valentin Bartenev 0be9554bda Proxy: added variables and regexp support to the first parameter of 
the "proxy_redirect" directive.
2011-12-12 09:02:29 +00:00

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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;
union {
ngx_http_complex_value_t complex;
#if (NGX_PCRE)
ngx_http_regex_t *regex;
#endif
} redirect;
ngx_http_complex_value_t 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 *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 http_version;
ngx_uint_t headers_hash_max_size;
ngx_uint_t headers_hash_bucket_size;
} ngx_http_proxy_loc_conf_t;
typedef struct {
ngx_http_status_t status;
ngx_http_proxy_vars_t vars;
size_t internal_body_length;
ngx_uint_t state;
off_t size;
off_t length;
ngx_uint_t head; /* unsigned head:1 */
} ngx_http_proxy_ctx_t;
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_process_header(ngx_http_request_t *r);
static ngx_int_t ngx_http_proxy_input_filter_init(void *data);
static ngx_int_t ngx_http_proxy_copy_filter(ngx_event_pipe_t *p,
ngx_buf_t *buf);
static ngx_int_t ngx_http_proxy_chunked_filter(ngx_event_pipe_t *p,
ngx_buf_t *buf);
static ngx_int_t ngx_http_proxy_non_buffered_copy_filter(void *data,
ssize_t bytes);
static ngx_int_t ngx_http_proxy_non_buffered_chunked_filter(void *data,
ssize_t bytes);
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);
#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_enum_t ngx_http_proxy_http_version[] = {
{ ngx_string("1.0"), NGX_HTTP_VERSION_10 },
{ ngx_string("1.1"), NGX_HTTP_VERSION_11 },
{ 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_TAKE1,
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_TAKE1,
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_bypass"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
ngx_http_set_predicate_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_bypass),
NULL },
{ ngx_string("proxy_no_cache"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
ngx_http_set_predicate_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_loc_conf_t, upstream.no_cache),
NULL },
{ 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_pass_header"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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_TAKE1,
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_upstream_ignore_headers_masks },
{ ngx_string("proxy_http_version"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_enum_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_loc_conf_t, http_version),
&ngx_http_proxy_http_version },
#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 char ngx_http_proxy_version_11[] = " HTTP/1.1" CRLF;
static ngx_keyval_t ngx_http_proxy_headers[] = {
{ ngx_string("Host"), ngx_string("$proxy_host") },
{ ngx_string("Connection"), ngx_string("close") },
{ ngx_string("Keep-Alive"), ngx_string("") },
{ ngx_string("Expect"), ngx_string("") },
{ ngx_string("Upgrade"), ngx_string("") },
{ ngx_null_string, ngx_null_string }
};
static ngx_str_t ngx_http_proxy_hide_headers[] = {
ngx_string("Date"),
ngx_string("Server"),
ngx_string("X-Pad"),
ngx_string("X-Accel-Expires"),
ngx_string("X-Accel-Redirect"),
ngx_string("X-Accel-Limit-Rate"),
ngx_string("X-Accel-Buffering"),
ngx_string("X-Accel-Charset"),
ngx_null_string
};
#if (NGX_HTTP_CACHE)
static ngx_keyval_t ngx_http_proxy_cache_headers[] = {
{ ngx_string("Host"), ngx_string("$proxy_host") },
{ ngx_string("Connection"), ngx_string("close") },
{ ngx_string("Keep-Alive"), ngx_string("") },
{ ngx_string("Expect"), ngx_string("") },
{ ngx_string("Upgrade"), 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 }
};
#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 == NULL) {
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_http_proxy_copy_filter;
u->pipe->input_ctx = r;
u->input_filter_init = ngx_http_proxy_input_filter_init;
u->input_filter = ngx_http_proxy_non_buffered_copy_filter;
u->input_filter_ctx = r;
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 (proxy.len > 7
&& ngx_strncasecmp(proxy.data, (u_char *) "http://", 7) == 0)
{
add = 7;
port = 80;
#if (NGX_HTTP_SSL)
} else if (proxy.len > 8
&& 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++;
}
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (method.len == 5
&& ngx_strncasecmp(method.data, (u_char *) "HEAD ", 5) == 0)
{
ctx->head = 1;
}
len = method.len + sizeof(ngx_http_proxy_version) - 1 + sizeof(CRLF) - 1;
escape = 0;
loc_len = 0;
unparsed_uri = 0;
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->space_in_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;
if (plcf->http_version == NGX_HTTP_VERSION_11) {
b->last = ngx_cpymem(b->last, ngx_http_proxy_version_11,
sizeof(ngx_http_proxy_version_11) - 1);
} else {
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;
}
} else {
u->request_bufs = cl;
}
b->flush = 1;
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.code = 0;
ctx->status.count = 0;
ctx->status.start = NULL;
ctx->status.end = NULL;
ctx->state = 0;
r->upstream->process_header = ngx_http_proxy_process_status_line;
r->upstream->pipe->input_filter = ngx_http_proxy_copy_filter;
r->upstream->input_filter = ngx_http_proxy_non_buffered_copy_filter;
r->state = 0;
return NGX_OK;
}
static ngx_int_t
ngx_http_proxy_process_status_line(ngx_http_request_t *r)
{
size_t len;
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;
}
u = r->upstream;
rc = ngx_http_parse_status_line(r, &u->buffer, &ctx->status);
if (rc == NGX_AGAIN) {
return rc;
}
if (rc == NGX_ERROR) {
#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;
u->headers_in.connection_close = 1;
return NGX_OK;
}
if (u->state) {
u->state->status = ctx->status.code;
}
u->headers_in.status_n = ctx->status.code;
len = ctx->status.end - ctx->status.start;
u->headers_in.status_line.len = len;
u->headers_in.status_line.data = ngx_pnalloc(r->pool, len);
if (u->headers_in.status_line.data == NULL) {
return NGX_ERROR;
}
ngx_memcpy(u->headers_in.status_line.data, ctx->status.start, 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);
if (ctx->status.http_version < NGX_HTTP_VERSION_11) {
u->headers_in.connection_close = 1;
}
u->process_header = ngx_http_proxy_process_header;
return ngx_http_proxy_process_header(r);
}
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_t *u;
ngx_http_proxy_ctx_t *ctx;
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";
}
/* clear content length if response is chunked */
u = r->upstream;
if (u->headers_in.chunked) {
u->headers_in.content_length_n = -1;
}
/*
* set u->keepalive if response has no body; this allows to keep
* connections alive in case of r->header_only or X-Accel-Redirect
*/
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (u->headers_in.status_n == NGX_HTTP_NO_CONTENT
|| u->headers_in.status_n == NGX_HTTP_NOT_MODIFIED
|| ctx->head
|| (!u->headers_in.chunked
&& u->headers_in.content_length_n == 0))
{
u->keepalive = !u->headers_in.connection_close;
}
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 ngx_int_t
ngx_http_proxy_input_filter_init(void *data)
{
ngx_http_request_t *r = data;
ngx_http_upstream_t *u;
ngx_http_proxy_ctx_t *ctx;
u = r->upstream;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http proxy filter init s:%d h:%d c:%d l:%O",
u->headers_in.status_n, ctx->head, u->headers_in.chunked,
u->headers_in.content_length_n);
/* as per RFC2616, 4.4 Message Length */
if (u->headers_in.status_n == NGX_HTTP_NO_CONTENT
|| u->headers_in.status_n == NGX_HTTP_NOT_MODIFIED
|| ctx->head)
{
/* 1xx, 204, and 304 and replies to HEAD requests */
/* no 1xx since we don't send Expect and Upgrade */
u->pipe->length = 0;
u->length = 0;
u->keepalive = !u->headers_in.connection_close;
} else if (u->headers_in.chunked) {
/* chunked */
u->pipe->input_filter = ngx_http_proxy_chunked_filter;
u->pipe->length = 3; /* "0" LF LF */
u->input_filter = ngx_http_proxy_non_buffered_chunked_filter;
u->length = -1;
} else if (u->headers_in.content_length_n == 0) {
/* empty body: special case as filter won't be called */
u->pipe->length = 0;
u->length = 0;
u->keepalive = !u->headers_in.connection_close;
} else {
/* content length or connection close */
u->pipe->length = u->headers_in.content_length_n;
u->length = u->headers_in.content_length_n;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_proxy_copy_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
{
ngx_buf_t *b;
ngx_chain_t *cl;
ngx_http_request_t *r;
if (buf->pos == buf->last) {
return NGX_OK;
}
if (p->free) {
cl = p->free;
b = cl->buf;
p->free = cl->next;
ngx_free_chain(p->pool, cl);
} else {
b = ngx_alloc_buf(p->pool);
if (b == NULL) {
return NGX_ERROR;
}
}
ngx_memcpy(b, buf, sizeof(ngx_buf_t));
b->shadow = buf;
b->tag = p->tag;
b->last_shadow = 1;
b->recycled = 1;
buf->shadow = b;
cl = ngx_alloc_chain_link(p->pool);
if (cl == NULL) {
return NGX_ERROR;
}
cl->buf = b;
cl->next = NULL;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, p->log, 0, "input buf #%d", b->num);
if (p->in) {
*p->last_in = cl;
} else {
p->in = cl;
}
p->last_in = &cl->next;
if (p->length == -1) {
return NGX_OK;
}
p->length -= b->last - b->pos;
if (p->length == 0) {
r = p->input_ctx;
p->upstream_done = 1;
r->upstream->keepalive = !r->upstream->headers_in.connection_close;
} else if (p->length < 0) {
r = p->input_ctx;
p->upstream_done = 1;
ngx_log_error(NGX_LOG_WARN, r->connection->log, 0,
"upstream sent too much data");
}
return NGX_OK;
}
static ngx_inline ngx_int_t
ngx_http_proxy_parse_chunked(ngx_http_request_t *r, ngx_buf_t *buf)
{
u_char *pos, ch, c;
ngx_int_t rc;
ngx_http_proxy_ctx_t *ctx;
enum {
sw_chunk_start = 0,
sw_chunk_size,
sw_chunk_extension,
sw_chunk_extension_almost_done,
sw_chunk_data,
sw_after_data,
sw_after_data_almost_done,
sw_last_chunk_extension,
sw_last_chunk_extension_almost_done,
sw_trailer,
sw_trailer_almost_done,
sw_trailer_header,
sw_trailer_header_almost_done
} state;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
state = ctx->state;
if (state == sw_chunk_data && ctx->size == 0) {
state = sw_after_data;
}
rc = NGX_AGAIN;
for (pos = buf->pos; pos < buf->last; pos++) {
ch = *pos;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http proxy chunked byte: %02Xd s:%d", ch, state);
switch (state) {
case sw_chunk_start:
if (ch >= '0' && ch <= '9') {
state = sw_chunk_size;
ctx->size = ch - '0';
break;
}
c = (u_char) (ch | 0x20);
if (c >= 'a' && c <= 'f') {
state = sw_chunk_size;
ctx->size = c - 'a' + 10;
break;
}
goto invalid;
case sw_chunk_size:
if (ch >= '0' && ch <= '9') {
ctx->size = ctx->size * 16 + (ch - '0');
break;
}
c = (u_char) (ch | 0x20);
if (c >= 'a' && c <= 'f') {
ctx->size = ctx->size * 16 + (c - 'a' + 10);
break;
}
if (ctx->size == 0) {
switch (ch) {
case CR:
state = sw_last_chunk_extension_almost_done;
break;
case LF:
state = sw_trailer;
break;
case ';':
case ' ':
case '\t':
state = sw_last_chunk_extension;
break;
default:
goto invalid;
}
break;
}
switch (ch) {
case CR:
state = sw_chunk_extension_almost_done;
break;
case LF:
state = sw_chunk_data;
break;
case ';':
case ' ':
case '\t':
state = sw_chunk_extension;
break;
default:
goto invalid;
}
break;
case sw_chunk_extension:
switch (ch) {
case CR:
state = sw_chunk_extension_almost_done;
break;
case LF:
state = sw_chunk_data;
}
break;
case sw_chunk_extension_almost_done:
if (ch == LF) {
state = sw_chunk_data;
break;
}
goto invalid;
case sw_chunk_data:
rc = NGX_OK;
goto data;
case sw_after_data:
switch (ch) {
case CR:
state = sw_after_data_almost_done;
break;
case LF:
state = sw_chunk_start;
}
break;
case sw_after_data_almost_done:
if (ch == LF) {
state = sw_chunk_start;
break;
}
goto invalid;
case sw_last_chunk_extension:
switch (ch) {
case CR:
state = sw_last_chunk_extension_almost_done;
break;
case LF:
state = sw_trailer;
}
break;
case sw_last_chunk_extension_almost_done:
if (ch == LF) {
state = sw_trailer;
break;
}
goto invalid;
case sw_trailer:
switch (ch) {
case CR:
state = sw_trailer_almost_done;
break;
case LF:
goto done;
default:
state = sw_trailer_header;
}
break;
case sw_trailer_almost_done:
if (ch == LF) {
goto done;
}
goto invalid;
case sw_trailer_header:
switch (ch) {
case CR:
state = sw_trailer_header_almost_done;
break;
case LF:
state = sw_trailer;
}
break;
case sw_trailer_header_almost_done:
if (ch == LF) {
state = sw_trailer;
break;
}
goto invalid;
}
}
data:
ctx->state = state;
buf->pos = pos;
switch (state) {
case sw_chunk_start:
ctx->length = 3 /* "0" LF LF */;
break;
case sw_chunk_size:
ctx->length = 2 /* LF LF */
+ (ctx->size ? ctx->size + 4 /* LF "0" LF LF */ : 0);
break;
case sw_chunk_extension:
case sw_chunk_extension_almost_done:
ctx->length = 1 /* LF */ + ctx->size + 4 /* LF "0" LF LF */;
break;
case sw_chunk_data:
ctx->length = ctx->size + 4 /* LF "0" LF LF */;
break;
case sw_after_data:
case sw_after_data_almost_done:
ctx->length = 4 /* LF "0" LF LF */;
break;
case sw_last_chunk_extension:
case sw_last_chunk_extension_almost_done:
ctx->length = 2 /* LF LF */;
break;
case sw_trailer:
case sw_trailer_almost_done:
ctx->length = 1 /* LF */;
break;
case sw_trailer_header:
case sw_trailer_header_almost_done:
ctx->length = 2 /* LF LF */;
break;
}
return rc;
done:
return NGX_DONE;
invalid:
return NGX_ERROR;
}
static ngx_int_t
ngx_http_proxy_chunked_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
{
ngx_int_t rc;
ngx_buf_t *b, **prev;
ngx_chain_t *cl;
ngx_http_request_t *r;
ngx_http_proxy_ctx_t *ctx;
if (buf->pos == buf->last) {
return NGX_OK;
}
r = p->input_ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
b = NULL;
prev = &buf->shadow;
for ( ;; ) {
rc = ngx_http_proxy_parse_chunked(r, buf);
if (rc == NGX_OK) {
/* a chunk has been parsed successfully */
if (p->free) {
cl = p->free;
b = cl->buf;
p->free = cl->next;
ngx_free_chain(p->pool, cl);
} else {
b = ngx_alloc_buf(p->pool);
if (b == NULL) {
return NGX_ERROR;
}
}
ngx_memzero(b, sizeof(ngx_buf_t));
b->pos = buf->pos;
b->start = buf->start;
b->end = buf->end;
b->tag = p->tag;
b->temporary = 1;
b->recycled = 1;
*prev = b;
prev = &b->shadow;
cl = ngx_alloc_chain_link(p->pool);
if (cl == NULL) {
return NGX_ERROR;
}
cl->buf = b;
cl->next = NULL;
if (p->in) {
*p->last_in = cl;
} else {
p->in = cl;
}
p->last_in = &cl->next;
/* STUB */ b->num = buf->num;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
"input buf #%d %p", b->num, b->pos);
if (buf->last - buf->pos >= ctx->size) {
buf->pos += ctx->size;
b->last = buf->pos;
ctx->size = 0;
continue;
}
ctx->size -= buf->last - buf->pos;
buf->pos = buf->last;
b->last = buf->last;
continue;
}
if (rc == NGX_DONE) {
/* a whole response has been parsed successfully */
p->upstream_done = 1;
r->upstream->keepalive = !r->upstream->headers_in.connection_close;
break;
}
if (rc == NGX_AGAIN) {
/* set p->length, minimal amount of data we want to see */
p->length = ctx->length;
break;
}
/* invalid response */
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"upstream sent invalid chunked response");
return NGX_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http proxy chunked state %d, length %d",
ctx->state, p->length);
if (b) {
b->shadow = buf;
b->last_shadow = 1;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
"input buf %p %z", b->pos, b->last - b->pos);
return NGX_OK;
}
/* there is no data record in the buf, add it to free chain */
if (ngx_event_pipe_add_free_buf(p, buf) != NGX_OK) {
return NGX_ERROR;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_proxy_non_buffered_copy_filter(void *data, ssize_t bytes)
{
ngx_http_request_t *r = data;
ngx_buf_t *b;
ngx_chain_t *cl, **ll;
ngx_http_upstream_t *u;
u = r->upstream;
for (cl = u->out_bufs, ll = &u->out_bufs; cl; cl = cl->next) {
ll = &cl->next;
}
cl = ngx_chain_get_free_buf(r->pool, &u->free_bufs);
if (cl == NULL) {
return NGX_ERROR;
}
*ll = cl;
cl->buf->flush = 1;
cl->buf->memory = 1;
b = &u->buffer;
cl->buf->pos = b->last;
b->last += bytes;
cl->buf->last = b->last;
cl->buf->tag = u->output.tag;
if (u->length == -1) {
return NGX_OK;
}
u->length -= bytes;
if (u->length == 0) {
u->keepalive = !u->headers_in.connection_close;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_proxy_non_buffered_chunked_filter(void *data, ssize_t bytes)
{
ngx_http_request_t *r = data;
ngx_int_t rc;
ngx_buf_t *b, *buf;
ngx_chain_t *cl, **ll;
ngx_http_upstream_t *u;
ngx_http_proxy_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
u = r->upstream;
buf = &u->buffer;
buf->pos = buf->last;
buf->last += bytes;
for (cl = u->out_bufs, ll = &u->out_bufs; cl; cl = cl->next) {
ll = &cl->next;
}
for ( ;; ) {
rc = ngx_http_proxy_parse_chunked(r, buf);
if (rc == NGX_OK) {
/* a chunk has been parsed successfully */
cl = ngx_chain_get_free_buf(r->pool, &u->free_bufs);
if (cl == NULL) {
return NGX_ERROR;
}
*ll = cl;
ll = &cl->next;
b = cl->buf;
b->flush = 1;
b->memory = 1;
b->pos = buf->pos;
b->tag = u->output.tag;
if (buf->last - buf->pos >= ctx->size) {
buf->pos += ctx->size;
b->last = buf->pos;
ctx->size = 0;
} else {
ctx->size -= buf->last - buf->pos;
buf->pos = buf->last;
b->last = buf->last;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http proxy out buf %p %z",
b->pos, b->last - b->pos);
continue;
}
if (rc == NGX_DONE) {
/* a whole response has been parsed successfully */
u->keepalive = !u->headers_in.connection_close;
u->length = 0;
break;
}
if (rc == NGX_AGAIN) {
break;
}
/* invalid response */
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"upstream sent invalid chunked response");
return NGX_ERROR;
}
/* provide continuous buffer for subrequests in memory */
if (r->subrequest_in_memory) {
cl = u->out_bufs;
if (cl) {
buf->pos = cl->buf->pos;
}
buf->last = buf->pos;
for (cl = u->out_bufs; cl; cl = cl->next) {
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http proxy in memory %p-%p %uz",
cl->buf->pos, cl->buf->last, ngx_buf_size(cl->buf));
if (buf->last == cl->buf->pos) {
buf->last = cl->buf->last;
continue;
}
buf->last = ngx_movemem(buf->last, cl->buf->pos,
cl->buf->last - cl->buf->pos);
cl->buf->pos = buf->last - (cl->buf->last - cl->buf->pos);
cl->buf->last = buf->last;
}
}
return NGX_OK;
}
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_complex(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_str_t redirect, replacement;
if (ngx_http_complex_value(r, &pr->redirect.complex, &redirect) != NGX_OK) {
return NGX_ERROR;
}
if (redirect.len > h->value.len - prefix
|| ngx_rstrncmp(h->value.data + prefix, redirect.data,
redirect.len) != 0)
{
return NGX_DECLINED;
}
if (ngx_http_complex_value(r, &pr->replacement, &replacement) != NGX_OK) {
return NGX_ERROR;
}
len = replacement.len + h->value.len - redirect.len;
data = ngx_pnalloc(r->pool, len);
if (data == NULL) {
return NGX_ERROR;
}
p = ngx_copy(data, h->value.data, prefix);
if (replacement.len) {
p = ngx_copy(p, replacement.data, replacement.len);
}
ngx_memcpy(p, h->value.data + prefix + redirect.len,
h->value.len - redirect.len - prefix);
h->value.len = len;
h->value.data = data;
return NGX_OK;
}
#if (NGX_PCRE)
static ngx_int_t
ngx_http_proxy_rewrite_redirect_regex(ngx_http_request_t *r, ngx_table_elt_t *h,
size_t prefix, ngx_http_proxy_redirect_t *pr)
{
ngx_str_t redirect, replacement;
redirect.len = h->value.len - prefix;
redirect.data = h->value.data + prefix;
if (ngx_http_regex_exec(r, pr->redirect.regex, &redirect) != NGX_OK) {
return NGX_DECLINED;
}
if (ngx_http_complex_value(r, &pr->replacement, &replacement) != NGX_OK) {
return NGX_ERROR;
}
h->value = replacement;
return NGX_OK;
}
#endif
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_bypass = NGX_CONF_UNSET_PTR;
conf->upstream.no_cache = NGX_CONF_UNSET_PTR;
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->http_version = NGX_CONF_UNSET_UINT;
conf->headers_hash_max_size = NGX_CONF_UNSET_UINT;
conf->headers_hash_bucket_size = NGX_CONF_UNSET_UINT;
ngx_str_set(&conf->upstream.module, "proxy");
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;
u_char *p;
size_t size;
ngx_hash_init_t hash;
ngx_http_core_loc_conf_t *clcf;
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_bypass,
prev->upstream.cache_bypass, NULL);
ngx_conf_merge_ptr_value(conf->upstream.no_cache,
prev->upstream.no_cache, NULL);
if (conf->upstream.no_cache && conf->upstream.cache_bypass == NULL) {
ngx_log_error(NGX_LOG_WARN, cf->log, 0,
"\"proxy_no_cache\" functionality has been changed in 0.8.46, "
"now it should be used together with \"proxy_cache_bypass\"");
}
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;
}
ngx_memzero(&pr->redirect.complex,
sizeof(ngx_http_complex_value_t));
ngx_memzero(&pr->replacement, sizeof(ngx_http_complex_value_t));
pr->handler = ngx_http_proxy_rewrite_redirect_complex;
if (conf->vars.uri.len) {
pr->redirect.complex.value = conf->url;
pr->replacement.value = conf->location;
} else {
pr->redirect.complex.value.len = conf->url.len
+ sizeof("/") - 1;
p = ngx_pnalloc(cf->pool, pr->redirect.complex.value.len);
if (p == NULL) {
return NGX_CONF_ERROR;
}
pr->redirect.complex.value.data = p;
p = ngx_cpymem(p, conf->url.data, conf->url.len);
*p = '/';
ngx_str_set(&pr->replacement.value, "/");
}
}
}
#if (NGX_HTTP_SSL)
if (conf->upstream.ssl == NULL) {
conf->upstream.ssl = prev->upstream.ssl;
}
#endif
ngx_conf_merge_uint_value(conf->http_version, prev->http_version,
NGX_HTTP_VERSION_10);
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_upstream_hide_headers_hash(cf, &conf->upstream,
&prev->upstream, ngx_http_proxy_hide_headers, &hash)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
if (conf->upstream.upstream == NULL) {
conf->upstream.upstream = prev->upstream.upstream;
conf->vars = prev->vars;
}
if (conf->proxy_lengths == NULL) {
conf->proxy_lengths = prev->proxy_lengths;
conf->proxy_values = prev->proxy_values;
}
if (conf->upstream.upstream || conf->proxy_lengths) {
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
if (clcf->handler == NULL && clcf->lmt_excpt) {
clcf->handler = ngx_http_proxy_handler;
conf->location = prev->location;
}
}
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 (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_array_t headers_names, headers_merged;
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
&& ((conf->body_source.data == NULL)
== (prev->body_source.data == NULL))
#if (NGX_HTTP_CACHE)
&& ((conf->upstream.cache == NULL) == (prev->upstream.cache == NULL))
#endif
)
{
return NGX_OK;
}
if (ngx_array_init(&headers_names, cf->temp_pool, 4, sizeof(ngx_hash_key_t))
!= NGX_OK)
{
return NGX_ERROR;
}
if (ngx_array_init(&headers_merged, cf->temp_pool, 4, sizeof(ngx_keyval_t))
!= NGX_OK)
{
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;
}
#if (NGX_HTTP_CACHE)
h = conf->upstream.cache ? ngx_http_proxy_cache_headers:
ngx_http_proxy_headers;
#else
h = ngx_http_proxy_headers;
#endif
src = conf->headers_source->elts;
for (i = 0; i < conf->headers_source->nelts; i++) {
s = ngx_array_push(&headers_merged);
if (s == NULL) {
return NGX_ERROR;
}
*s = src[i];
}
while (h->key.len) {
src = headers_merged.elts;
for (i = 0; i < headers_merged.nelts; i++) {
if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) {
goto next;
}
}
s = ngx_array_push(&headers_merged);
if (s == NULL) {
return NGX_ERROR;
}
*s = *h;
next:
h++;
}
if (conf->body_source.data) {
s = ngx_array_push(&headers_merged);
if (s == NULL) {
return NGX_ERROR;
}
ngx_str_set(&s->key, "Content-Length");
ngx_str_set(&s->value, "$proxy_internal_body_length");
}
src = headers_merged.elts;
for (i = 0; i < headers_merged.nelts; i++) {
hk = ngx_array_push(&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;
return ngx_hash_init(&hash, headers_names.elts, headers_names.nelts);
}
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;
u_char *p;
ngx_str_t *value;
ngx_http_proxy_redirect_t *pr;
ngx_http_compile_complex_value_t ccv;
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_complex;
ngx_memzero(&pr->redirect.complex, sizeof(ngx_http_complex_value_t));
ngx_memzero(&pr->replacement, sizeof(ngx_http_complex_value_t));
if (plcf->vars.uri.len) {
pr->redirect.complex.value = plcf->url;
pr->replacement.value = plcf->location;
} else {
pr->redirect.complex.value.len = plcf->url.len + sizeof("/") - 1;
p = ngx_pnalloc(cf->pool, pr->redirect.complex.value.len);
if (p == NULL) {
return NGX_CONF_ERROR;
}
pr->redirect.complex.value.data = p;
p = ngx_cpymem(p, plcf->url.data, plcf->url.len);
*p = '/';
ngx_str_set(&pr->replacement.value, "/");
}
return NGX_CONF_OK;
}
if (value[1].data[0] == '~') {
#if (NGX_PCRE)
u_char errstr[NGX_MAX_CONF_ERRSTR];
ngx_regex_compile_t rc;
value[1].len--;
value[1].data++;
ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
if (value[1].data[0] == '*') {
value[1].len--;
value[1].data++;
rc.options = NGX_REGEX_CASELESS;
}
rc.pattern = value[1];
rc.err.len = NGX_MAX_CONF_ERRSTR;
rc.err.data = errstr;
pr->redirect.regex = ngx_http_regex_compile(cf, &rc);
if (pr->redirect.regex == NULL) {
return NGX_CONF_ERROR;
}
pr->handler = ngx_http_proxy_rewrite_redirect_regex;
#else
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"using regex \"%V\" requires PCRE library",
&value[1]);
return NGX_CONF_ERROR;
#endif
} else {
ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
ccv.cf = cf;
ccv.value = &value[1];
ccv.complex_value = &pr->redirect.complex;
if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
return NGX_CONF_ERROR;
}
pr->handler = ngx_http_proxy_rewrite_redirect_complex;
}
ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
ccv.cf = cf;
ccv.value = &value[2];
ccv.complex_value = &pr->replacement;
if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
return NGX_CONF_ERROR;
}
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;
}
#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;
}
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