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nginx/src/http/modules/ngx_http_proxy_module.c
Igor Sysoev 09c684b2d5 nginx-0.3.8-RELEASE import 
*) Security: nginx now checks URI got from a backend in
       "X-Accel-Redirect" header line or in SSI file for the "/../" paths
       and zeroes.

    *) Change: nginx now does not treat the empty user name in the
       "Authorization" header line as valid one.

    *) Feature: the "ssl_session_timeout" directives of the
       ngx_http_ssl_module and ngx_imap_ssl_module.

    *) Feature: the "auth_http_header" directive of the
       ngx_imap_auth_http_module.

    *) Feature: the "add_header" directive.

    *) Feature: the ngx_http_realip_module.

    *) Feature: the new variables to use in the "log_format" directive:
       $bytes_sent, $apache_bytes_sent, $status, $time_gmt, $uri,
       $request_time, $request_length, $upstream_status,
       $upstream_response_time, $gzip_ratio, $uid_got, $uid_set,
       $connection, $pipe, and $msec. The parameters in the "%name" form
       will be canceled soon.

    *) Change: now the false variable values in the "if" directive are the
       empty string "" and string starting with "0".

    *) Bugfix: while using proxied or FastCGI-server nginx may leave
       connections and temporary files with client requests in open state.

    *) Bugfix: the worker processes did not flush the buffered logs on
       graceful exit.

    *) Bugfix: if the request URI was changes by the "rewrite" directive
       and the request was proxied in location given by regular expression,
       then the incorrect request was transferred to backend; the bug had
       appeared in 0.2.6.

    *) Bugfix: the "expires" directive did not remove the previous
       "Expires" header.

    *) Bugfix: nginx may stop to accept requests if the "rtsig" method and
       several worker processes were used.

    *) Bugfix: the "\"" and "\'" escape symbols were incorrectly handled in
       SSI commands.

    *) Bugfix: if the response was ended just after the SSI command and
       gzipping was used, then the response did not transferred complete or
       did not transferred at all.
2005-11-09 17:25:55 +00:00

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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.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_http_upstream_conf_t upstream;
ngx_peers_t *peers;
ngx_array_t *flushes;
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 *redirects;
ngx_str_t method;
ngx_str_t host_header;
ngx_str_t port_text;
ngx_flag_t redirect;
} 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_ctx_t;
#define NGX_HTTP_PROXY_PARSE_NO_HEADER 20
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 *p);
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_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 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_lowat_check(ngx_conf_t *cf, void *post, void *data);
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_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
{ ngx_null_string, 0 }
};
static ngx_command_t ngx_http_proxy_commands[] = {
{ ngx_string("proxy_pass"),
NGX_HTTP_LOC_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_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_redirect_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.redirect_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_table_elt_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_loc_conf_t, headers_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_header_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.header_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 },
{ 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),
(void *) ngx_garbage_collector_temp_handler },
{ 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_conf_set_num_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_loc_conf_t, upstream.max_fails),
NULL },
{ ngx_string("proxy_upstream_fail_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_sec_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_proxy_loc_conf_t, upstream.fail_timeout),
NULL },
{ ngx_string("proxy_pass_x_powered_by"),
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_x_powered_by),
NULL },
{ ngx_string("proxy_pass_server"),
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_server),
NULL },
{ ngx_string("proxy_pass_x_accel_expires"),
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_x_accel_expires),
NULL },
ngx_null_command
};
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_table_elt_t ngx_http_proxy_headers[] = {
{ 0, ngx_string("Host"), ngx_string("$proxy_host") },
{ 0, ngx_string("Connection"), ngx_string("close") },
{ 0, ngx_null_string, ngx_null_string }
};
static ngx_http_variable_t ngx_http_proxy_vars[] = {
{ ngx_string("proxy_host"), ngx_http_proxy_host_variable, 0,
NGX_HTTP_VAR_CHANGABLE, 0 },
{ ngx_string("proxy_port"), ngx_http_proxy_port_variable, 0,
NGX_HTTP_VAR_CHANGABLE, 0 },
{ ngx_string("proxy_add_x_forwarded_for"),
ngx_http_proxy_add_x_forwarded_for_variable, 0, 0, 0 },
#if 0
{ ngx_string("proxy_add_via"), NULL, 0, 0, 0 },
#endif
{ ngx_null_string, NULL, 0, 0, 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_loc_conf_t *plcf;
plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
u = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_t));
if (u == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
u->peer.log = r->connection->log;
u->peer.log_error = NGX_ERROR_ERR;
u->peer.peers = plcf->peers;
u->peer.tries = plcf->peers->number;
#if (NGX_THREADS)
u->peer.lock = &r->connection->lock;
#endif
u->output.tag = (ngx_buf_tag_t) &ngx_http_proxy_module;
u->conf = &plcf->upstream;
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;
if (plcf->redirects) {
u->rewrite_redirect = ngx_http_proxy_rewrite_redirect;
}
u->pipe.input_filter = ngx_event_pipe_copy_input_filter;
u->accel = 1;
r->upstream = u;
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_create_request(ngx_http_request_t *r)
{
size_t len, loc_len;
ngx_uint_t i, key;
uintptr_t escape;
ngx_buf_t *b;
ngx_str_t *hh, method;
ngx_chain_t *cl, *body;
ngx_list_part_t *part;
ngx_table_elt_t *header;
ngx_http_upstream_t *u;
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);
len = sizeof(ngx_http_proxy_version) - 1 + sizeof(CRLF) - 1;
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 + u->conf->uri.len;
escape = 0;
loc_len = r->valid_location ? u->conf->location.len : 0;
if (u->conf->uri.len == 0 && r->valid_unparsed_uri) {
len += r->unparsed_uri.len;
} else {
if (r->quoted_uri) {
escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
r->uri.len - loc_len, NGX_ESCAPE_URI);
}
len += r->uri.len - loc_len + escape + sizeof("?") - 1 + r->args.len;
}
ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
ngx_http_script_flush_no_cachable_variables(r, plcf->flushes);
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);
}
hh = (ngx_str_t *) plcf->headers_set_hash->buckets;
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;
}
key = header[i].hash % plcf->headers_set_hash->hash_size;
if (hh[key].len == header[i].key.len
&& ngx_strcasecmp(hh[key].data, header[i].key.data) == 0)
{
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 (u->conf->uri.len == 0 && r->valid_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, u->conf->uri.data, u->conf->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);
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;
}
key = header[i].hash % plcf->headers_set_hash->hash_size;
if (hh[key].len == header[i].key.len
&& ngx_strcasecmp(hh[key].data, header[i].key.data) == 0)
{
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 (NGX_DEBUG)
{
ngx_str_t s;
s.len = b->last - b->pos;
s.data = b->pos;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http proxy header:\n\"%V\"", &s);
}
#endif
if (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;
}
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 *p;
p = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (p == NULL) {
return NGX_OK;
}
p->status = 0;
p->status_count = 0;
p->status_start = NULL;
p->status_end = NULL;
r->upstream->process_header = ngx_http_proxy_process_status_line;
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 *p;
p = ngx_http_get_module_ctx(r, ngx_http_proxy_module);
if (p == NULL) {
p = ngx_pcalloc(r->pool, sizeof(ngx_http_proxy_ctx_t));
if (p == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_http_set_ctx(r, p, ngx_http_proxy_module);
}
rc = ngx_http_proxy_parse_status_line(r, p);
if (rc == NGX_AGAIN) {
return rc;
}
u = r->upstream;
if (rc == NGX_HTTP_PROXY_PARSE_NO_HEADER) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"upstream sent no valid HTTP/1.0 header");
if (u->accel) {
return NGX_HTTP_UPSTREAM_INVALID_HEADER;
}
r->http_version = NGX_HTTP_VERSION_9;
p->status = NGX_HTTP_OK;
return NGX_OK;
}
u->headers_in.status_n = p->status;
u->state->status = p->status;
u->headers_in.status_line.len = p->status_end - p->status_start;
u->headers_in.status_line.data = ngx_palloc(r->pool,
u->headers_in.status_line.len);
if (u->headers_in.status_line.data == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_memcpy(u->headers_in.status_line.data, p->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, &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 *p)
{
u_char ch;
u_char *pos;
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 (pos = u->header_in.pos; pos < u->header_in.last; pos++) {
ch = *pos;
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 < '0' || ch > '9') {
return NGX_HTTP_PROXY_PARSE_NO_HEADER;
}
p->status = p->status * 10 + ch - '0';
if (++p->status_count == 3) {
state = sw_space_after_status;
p->status_start = pos - 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:
p->status_end = pos - 1;
switch (ch) {
case LF:
goto done;
default:
return NGX_HTTP_PROXY_PARSE_NO_HEADER;
}
}
}
u->header_in.pos = pos;
r->state = state;
return NGX_AGAIN;
done:
u->header_in.pos = pos + 1;
if (p->status_end == NULL) {
p->status_end = pos;
}
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_uint_t key;
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);
hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets;
for ( ;; ) {
rc = ngx_http_parse_header_line(r, &r->upstream->header_in);
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_HTTP_INTERNAL_SERVER_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_palloc(r->pool,
h->key.len + 1 + h->value.len + 1);
if (h->key.data == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
h->value.data = h->key.data + h->key.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);
key = h->hash % umcf->headers_in_hash.hash_size;
if (hh[key].name.len == h->key.len
&& ngx_strcasecmp(hh[key].name.data, h->key.data) == 0)
{
if (hh[key].handler(r, h, hh[key].offset) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_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");
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,
ngx_http_upstream_header_errors[rc
- NGX_HTTP_PARSE_HEADER_ERROR]);
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_loc_conf_t *plcf;
plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
v->len = plcf->host_header.len;
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
v->data = plcf->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_loc_conf_t *plcf;
plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);
v->len = plcf->port_text.len;
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
v->data = plcf->port_text.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_cachable = 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_palloc(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_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->handler(r, h, prefix, pr);
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_palloc(r->pool, len);
if (data == NULL) {
return NGX_ERROR;
}
p = data;
p = ngx_copy(p, h->value.data, prefix);
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;
for (len = prefix; *(uintptr_t *) e.ip; len += lcode(&e)) {
lcode = *(ngx_http_script_len_code_pt *) e.ip;
}
data = ngx_palloc(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);
}
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->handler = v->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 NGX_CONF_ERROR;
}
/*
* set by ngx_pcalloc():
*
* conf->upstream.bufs.num = 0;
* conf->upstream.path = NULL;
* conf->upstream.next_upstream = 0;
* conf->upstream.temp_path = NULL;
* conf->upstream.schema = { 0, NULL };
* conf->upstream.uri = { 0, NULL };
* conf->upstream.location = NULL;
*
* conf->method = NULL;
* conf->headers_source = NULL;
* conf->headers_set_len = NULL;
* conf->headers_set = NULL;
* conf->headers_set_hash = NULL;
* conf->rewrite_locations = NULL;
*/
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.header_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.max_fails = NGX_CONF_UNSET_UINT;
conf->upstream.fail_timeout = NGX_CONF_UNSET;
conf->upstream.pass_request_headers = NGX_CONF_UNSET;
conf->upstream.pass_request_body = NGX_CONF_UNSET;
conf->upstream.redirect_errors = NGX_CONF_UNSET;
/* "proxy_cyclic_temp_file" is disabled */
conf->upstream.cyclic_temp_file = 0;
conf->upstream.pass_x_powered_by = NGX_CONF_UNSET;
conf->upstream.pass_server = NGX_CONF_UNSET;
conf->upstream.pass_date = 0;
conf->upstream.pass_x_accel_expires = NGX_CONF_UNSET;
conf->redirect = NGX_CONF_UNSET;
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;
uintptr_t *code;
ngx_str_t *name;
ngx_uint_t i;
ngx_table_elt_t *src, *s, *h;
ngx_http_proxy_redirect_t *pr;
ngx_http_script_compile_t sc;
ngx_http_script_copy_code_t *copy;
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.header_buffer_size,
prev->upstream.header_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.header_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_header_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_header_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_header_buffer_size\" and "
"one of the \"proxy_buffers\"");
return NGX_CONF_ERROR;
}
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));
ngx_conf_merge_unsigned_value(conf->upstream.max_fails,
prev->upstream.max_fails, 1);
ngx_conf_merge_sec_value(conf->upstream.fail_timeout,
prev->upstream.fail_timeout, 10);
if (conf->peers && conf->peers->number > 1) {
for (i = 0; i < conf->peers->number; i++) {
conf->peers->peer[i].weight = 1;
conf->peers->peer[i].max_fails = conf->upstream.max_fails;
conf->peers->peer[i].fail_timeout = conf->upstream.fail_timeout;
}
}
ngx_conf_merge_path_value(conf->upstream.temp_path,
prev->upstream.temp_path,
NGX_HTTP_PROXY_TEMP_PATH, 1, 2, 0,
ngx_garbage_collector_temp_handler, cf);
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.redirect_errors,
prev->upstream.redirect_errors, 0);
ngx_conf_merge_value(conf->upstream.pass_x_powered_by,
prev->upstream.pass_x_powered_by, 1);
ngx_conf_merge_value(conf->upstream.pass_server,
prev->upstream.pass_server, 0);
ngx_conf_merge_value(conf->upstream.pass_x_accel_expires,
prev->upstream.pass_x_accel_expires, 0);
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->upstream.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->upstream.url;
pr->replacement.text = conf->upstream.location;
}
}
if (conf->peers == NULL) {
conf->peers = prev->peers;
}
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) {
return NGX_CONF_OK;
}
conf->headers_names = ngx_array_create(cf->pool, 4, sizeof(ngx_str_t));
if (conf->headers_names == NULL) {
return NGX_CONF_ERROR;
}
if (conf->headers_source == NULL) {
conf->headers_source = ngx_array_create(cf->pool, 4,
sizeof(ngx_table_elt_t));
if (conf->headers_source == NULL) {
return NGX_CONF_ERROR;
}
}
conf->headers_set_len = ngx_array_create(cf->pool, 64, 1);
if (conf->headers_set_len == NULL) {
return NGX_CONF_ERROR;
}
conf->headers_set = ngx_array_create(cf->pool, 512, 1);
if (conf->headers_set == NULL) {
return NGX_CONF_ERROR;
}
src = conf->headers_source->elts;
for (h = ngx_http_proxy_headers; h->key.len; h++) {
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_CONF_ERROR;
}
*s = *h;
src = conf->headers_source->elts;
next:
continue;
}
for (i = 0; i < conf->headers_source->nelts; i++) {
name = ngx_array_push(conf->headers_names);
if (name == NULL) {
return NGX_CONF_ERROR;
}
*name = src[i].key;
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_CONF_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_CONF_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_CONF_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_CONF_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_CONF_ERROR;
}
copy = ngx_array_push_n(conf->headers_set_len,
sizeof(ngx_http_script_copy_code_t));
if (copy == NULL) {
return NGX_CONF_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_CONF_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_CONF_ERROR;
}
*code = (uintptr_t) NULL;
code = ngx_array_push_n(conf->headers_set, sizeof(uintptr_t));
if (code == NULL) {
return NGX_CONF_ERROR;
}
*code = (uintptr_t) NULL;
}
code = ngx_array_push_n(conf->headers_set_len, sizeof(uintptr_t));
if (code == NULL) {
return NGX_CONF_ERROR;
}
*code = (uintptr_t) NULL;
conf->headers_set_hash = ngx_pcalloc(cf->pool, sizeof(ngx_hash_t));
if (conf->headers_set_hash == NULL) {
return NGX_CONF_ERROR;
}
conf->headers_set_hash->max_size = 100;
conf->headers_set_hash->bucket_limit = 1;
conf->headers_set_hash->bucket_size = sizeof(ngx_str_t);
conf->headers_set_hash->name = "proxy_headers";
if (ngx_hash_init(conf->headers_set_hash, cf->pool,
conf->headers_names->elts, conf->headers_names->nelts) != NGX_OK)
{
return NGX_CONF_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, cf->log, 0,
"proxy_headers hash size: %ui, "
"max buckets per entry: %ui",
conf->headers_set_hash->hash_size,
conf->headers_set_hash->min_buckets);
return NGX_CONF_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;
ngx_str_t *value, *url;
ngx_inet_upstream_t inet_upstream;
ngx_http_core_loc_conf_t *clcf;
#if (NGX_HAVE_UNIX_DOMAIN)
ngx_unix_domain_upstream_t unix_upstream;
#endif
if (plcf->upstream.schema.len) {
return "is duplicate";
}
value = cf->args->elts;
url = &value[1];
if (ngx_strncasecmp(url->data, "http://", 7) != 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid URL prefix");
return NGX_CONF_ERROR;
}
if (ngx_strncasecmp(url->data + 7, "unix:", 5) == 0) {
#if (NGX_HAVE_UNIX_DOMAIN)
ngx_memzero(&unix_upstream, sizeof(ngx_unix_domain_upstream_t));
unix_upstream.name = *url;
unix_upstream.url.len = url->len - 7;
unix_upstream.url.data = url->data + 7;
unix_upstream.uri_part = 1;
plcf->peers = ngx_unix_upstream_parse(cf, &unix_upstream);
if (plcf->peers == NULL) {
return NGX_CONF_ERROR;
}
plcf->host_header.len = sizeof("localhost") - 1;
plcf->host_header.data = (u_char *) "localhost";
plcf->upstream.uri = unix_upstream.uri;
#else
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"the unix domain sockets are not supported "
"on this platform");
return NGX_CONF_ERROR;
#endif
} else {
ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t));
inet_upstream.name = *url;
inet_upstream.url.len = url->len - 7;
inet_upstream.url.data = url->data + 7;
inet_upstream.default_port_value = 80;
inet_upstream.uri_part = 1;
plcf->peers = ngx_inet_upstream_parse(cf, &inet_upstream);
if (plcf->peers == NULL) {
return NGX_CONF_ERROR;
}
plcf->host_header = inet_upstream.host_header;
plcf->port_text = inet_upstream.port_text;
plcf->upstream.uri = inet_upstream.uri;
}
plcf->upstream.schema.len = sizeof("http://") - 1;
plcf->upstream.schema.data = (u_char *) "http://";
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
clcf->handler = ngx_http_proxy_handler;
plcf->upstream.location = clcf->name;
#if (NGX_PCRE)
if (clcf->regex) {
if (plcf->upstream.uri.len) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"proxy_pass\" may not have URI part in "
"location given by regular expression");
return NGX_CONF_ERROR;
}
plcf->upstream.location.len = 0;
}
#endif
plcf->upstream.url = *url;
if (clcf->name.data[clcf->name.len - 1] == '/') {
clcf->auto_redirect = 1;
}
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 (ngx_strcmp(value[1].data, "off") == 0) {
plcf->redirect = 0;
plcf->redirects = NULL;
return NGX_CONF_OK;
}
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 (cf->args->nelts == 2 && ngx_strcmp(value[1].data, "default") == 0) {
if (plcf->upstream.url.data == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"proxy_rewrite_location default\" must go "
"after the \"proxy_pass\" directive");
return NGX_CONF_ERROR;
}
pr->handler = ngx_http_proxy_rewrite_redirect_text;
pr->redirect = plcf->upstream.url;
pr->replacement.text = plcf->upstream.location;
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_lowat_check(ngx_conf_t *cf, void *post, void *data)
{
#if (NGX_FREEBSD)
ssize_t *np = data;
if (*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;
}
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