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nginx/src/http/ngx_http_special_response.c
Igor Sysoev 77e8b0c59f fix comment
2007-11-30 22:06:48 +00:00

718 lines
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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <nginx.h>
static ngx_int_t ngx_http_send_error_page(ngx_http_request_t *r,
ngx_http_err_page_t *err_page);
static ngx_int_t ngx_http_send_special_response(ngx_http_request_t *r,
ngx_http_core_loc_conf_t *clcf, ngx_uint_t err);
static ngx_int_t ngx_http_send_refresh(ngx_http_request_t *r);
static u_char ngx_http_error_full_tail[] =
"<hr><center>" NGINX_VER "</center>" CRLF
"</body>" CRLF
"</html>" CRLF
;
static u_char ngx_http_error_tail[] =
"<hr><center>nginx</center>" CRLF
"</body>" CRLF
"</html>" CRLF
;
static u_char ngx_http_msie_stub[] =
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
"<!-- The padding to disable MSIE's friendly error page -->" CRLF
;
static u_char ngx_http_msie_refresh_head[] =
"<html><head><meta http-equiv=\"Refresh\" content=\"0; URL=";
static u_char ngx_http_msie_refresh_tail[] =
"\"></head><body></body></html>" CRLF;
static char ngx_http_error_301_page[] =
"<html>" CRLF
"<head><title>301 Moved Permanently</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>301 Moved Permanently</h1></center>" CRLF
;
static char ngx_http_error_302_page[] =
"<html>" CRLF
"<head><title>302 Found</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>302 Found</h1></center>" CRLF
;
static char ngx_http_error_400_page[] =
"<html>" CRLF
"<head><title>400 Bad Request</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>400 Bad Request</h1></center>" CRLF
;
static char ngx_http_error_401_page[] =
"<html>" CRLF
"<head><title>401 Authorization Required</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>401 Authorization Required</h1></center>" CRLF
;
static char ngx_http_error_402_page[] =
"<html>" CRLF
"<head><title>402 Payment Required</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>402 Payment Required</h1></center>" CRLF
;
static char ngx_http_error_403_page[] =
"<html>" CRLF
"<head><title>403 Forbidden</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>403 Forbidden</h1></center>" CRLF
;
static char ngx_http_error_404_page[] =
"<html>" CRLF
"<head><title>404 Not Found</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>404 Not Found</h1></center>" CRLF
;
static char ngx_http_error_405_page[] =
"<html>" CRLF
"<head><title>405 Not Allowed</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>405 Not Allowed</h1></center>" CRLF
;
static char ngx_http_error_406_page[] =
"<html>" CRLF
"<head><title>406 Not Acceptable</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>406 Not Acceptable</h1></center>" CRLF
;
static char ngx_http_error_408_page[] =
"<html>" CRLF
"<head><title>408 Request Time-out</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>408 Request Time-out</h1></center>" CRLF
;
static char ngx_http_error_409_page[] =
"<html>" CRLF
"<head><title>409 Conflict</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>409 Conflict</h1></center>" CRLF
;
static char ngx_http_error_410_page[] =
"<html>" CRLF
"<head><title>410 Gone</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>410 Gone</h1></center>" CRLF
;
static char ngx_http_error_411_page[] =
"<html>" CRLF
"<head><title>411 Length Required</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>411 Length Required</h1></center>" CRLF
;
static char ngx_http_error_412_page[] =
"<html>" CRLF
"<head><title>412 Precondition Failed</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>412 Precondition Failed</h1></center>" CRLF
;
static char ngx_http_error_413_page[] =
"<html>" CRLF
"<head><title>413 Request Entity Too Large</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>413 Request Entity Too Large</h1></center>" CRLF
;
static char ngx_http_error_414_page[] =
"<html>" CRLF
"<head><title>414 Request-URI Too Large</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>414 Request-URI Too Large</h1></center>" CRLF
;
static char ngx_http_error_415_page[] =
"<html>" CRLF
"<head><title>415 Unsupported Media Type</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>415 Unsupported Media Type</h1></center>" CRLF
;
static char ngx_http_error_416_page[] =
"<html>" CRLF
"<head><title>416 Requested Range Not Satisfiable</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>416 Requested Range Not Satisfiable</h1></center>" CRLF
;
static char ngx_http_error_495_page[] =
"<html>" CRLF
"<head><title>400 The SSL certificate error</title></head>"
CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>400 Bad Request</h1></center>" CRLF
"<center>The SSL certificate error</center>" CRLF
;
static char ngx_http_error_496_page[] =
"<html>" CRLF
"<head><title>400 No required SSL certificate was sent</title></head>"
CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>400 Bad Request</h1></center>" CRLF
"<center>No required SSL certificate was sent</center>" CRLF
;
static char ngx_http_error_497_page[] =
"<html>" CRLF
"<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>"
CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>400 Bad Request</h1></center>" CRLF
"<center>The plain HTTP request was sent to HTTPS port</center>" CRLF
;
static char ngx_http_error_500_page[] =
"<html>" CRLF
"<head><title>500 Internal Server Error</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>500 Internal Server Error</h1></center>" CRLF
;
static char ngx_http_error_501_page[] =
"<html>" CRLF
"<head><title>501 Method Not Implemented</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>501 Method Not Implemented</h1></center>" CRLF
;
static char ngx_http_error_502_page[] =
"<html>" CRLF
"<head><title>502 Bad Gateway</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>502 Bad Gateway</h1></center>" CRLF
;
static char ngx_http_error_503_page[] =
"<html>" CRLF
"<head><title>503 Service Temporarily Unavailable</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>503 Service Temporarily Unavailable</h1></center>" CRLF
;
static char ngx_http_error_504_page[] =
"<html>" CRLF
"<head><title>504 Gateway Time-out</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>504 Gateway Time-out</h1></center>" CRLF
;
static char ngx_http_error_507_page[] =
"<html>" CRLF
"<head><title>507 Insufficient Storage</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>507 Insufficient Storage</h1></center>" CRLF
;
static ngx_str_t ngx_http_error_pages[] = {
ngx_null_string, /* 201, 204 */
#define NGX_HTTP_LEVEL_200 1
/* ngx_null_string, */ /* 300 */
ngx_string(ngx_http_error_301_page),
ngx_string(ngx_http_error_302_page),
ngx_null_string, /* 303 */
#define NGX_HTTP_LEVEL_300 3
ngx_string(ngx_http_error_400_page),
ngx_string(ngx_http_error_401_page),
ngx_string(ngx_http_error_402_page),
ngx_string(ngx_http_error_403_page),
ngx_string(ngx_http_error_404_page),
ngx_string(ngx_http_error_405_page),
ngx_string(ngx_http_error_406_page),
ngx_null_string, /* 407 */
ngx_string(ngx_http_error_408_page),
ngx_string(ngx_http_error_409_page),
ngx_string(ngx_http_error_410_page),
ngx_string(ngx_http_error_411_page),
ngx_string(ngx_http_error_412_page),
ngx_string(ngx_http_error_413_page),
ngx_string(ngx_http_error_414_page),
ngx_string(ngx_http_error_415_page),
ngx_string(ngx_http_error_416_page),
#define NGX_HTTP_LEVEL_400 17
ngx_string(ngx_http_error_495_page), /* 495, https certificate error */
ngx_string(ngx_http_error_496_page), /* 496, https no certificate */
ngx_string(ngx_http_error_497_page), /* 497, http to https */
ngx_string(ngx_http_error_404_page), /* 498, canceled */
ngx_null_string, /* 499, client has closed connection */
ngx_string(ngx_http_error_500_page),
ngx_string(ngx_http_error_501_page),
ngx_string(ngx_http_error_502_page),
ngx_string(ngx_http_error_503_page),
ngx_string(ngx_http_error_504_page),
ngx_null_string, /* 505 */
ngx_null_string, /* 506 */
ngx_string(ngx_http_error_507_page)
};
static ngx_str_t ngx_http_get_name = { 3, (u_char *) "GET " };
ngx_int_t
ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
{
ngx_int_t rc;
ngx_uint_t i, err;
ngx_http_err_page_t *err_page;
ngx_http_core_loc_conf_t *clcf;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http special response: %d, \"%V\"", error, &r->uri);
rc = ngx_http_discard_request_body(r);
if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
error = NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->err_status = error;
if (r->keepalive != 0) {
switch (error) {
case NGX_HTTP_BAD_REQUEST:
case NGX_HTTP_REQUEST_ENTITY_TOO_LARGE:
case NGX_HTTP_REQUEST_URI_TOO_LARGE:
case NGX_HTTP_TO_HTTPS:
case NGX_HTTPS_CERT_ERROR:
case NGX_HTTPS_NO_CERT:
case NGX_HTTP_INTERNAL_SERVER_ERROR:
r->keepalive = 0;
}
}
if (r->lingering_close == 1) {
switch (error) {
case NGX_HTTP_BAD_REQUEST:
case NGX_HTTP_TO_HTTPS:
case NGX_HTTPS_CERT_ERROR:
case NGX_HTTPS_NO_CERT:
r->lingering_close = 0;
}
}
r->headers_out.content_type.len = 0;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (!r->error_page && clcf->error_pages) {
if (clcf->recursive_error_pages == 0) {
r->error_page = 1;
}
err_page = clcf->error_pages->elts;
for (i = 0; i < clcf->error_pages->nelts; i++) {
if (err_page[i].status == error) {
return ngx_http_send_error_page(r, &err_page[i]);
}
}
}
if (clcf->msie_refresh
&& r->headers_in.msie
&& (error == NGX_HTTP_MOVED_PERMANENTLY
|| error == NGX_HTTP_MOVED_TEMPORARILY))
{
return ngx_http_send_refresh(r);
}
if (error == NGX_HTTP_CREATED) {
/* 201 */
err = 0;
r->header_only = 1;
} else if (error == NGX_HTTP_NO_CONTENT) {
/* 204 */
err = 0;
} else if (error < NGX_HTTP_BAD_REQUEST) {
/* 3XX */
err = error - NGX_HTTP_MOVED_PERMANENTLY + NGX_HTTP_LEVEL_200;
} else if (error < NGX_HTTP_OWN_CODES) {
/* 4XX */
err = error - NGX_HTTP_BAD_REQUEST + NGX_HTTP_LEVEL_200
+ NGX_HTTP_LEVEL_300;
} else {
/* 49X, 5XX */
err = error - NGX_HTTP_OWN_CODES + NGX_HTTP_LEVEL_200
+ NGX_HTTP_LEVEL_300
+ NGX_HTTP_LEVEL_400;
switch (error) {
case NGX_HTTP_TO_HTTPS:
case NGX_HTTPS_CERT_ERROR:
case NGX_HTTPS_NO_CERT:
r->err_status = NGX_HTTP_BAD_REQUEST;
break;
}
}
return ngx_http_send_special_response(r, clcf, err);
}
static ngx_int_t
ngx_http_send_error_page(ngx_http_request_t *r, ngx_http_err_page_t *err_page)
{
u_char ch, *p, *last;
ngx_str_t *uri, *args, u, a;
ngx_table_elt_t *location;
ngx_http_core_loc_conf_t *clcf;
r->err_status = err_page->overwrite;
r->method = NGX_HTTP_GET;
r->method_name = ngx_http_get_name;
r->zero_in_uri = 0;
args = NULL;
if (err_page->uri_lengths) {
if (ngx_http_script_run(r, &u, err_page->uri_lengths->elts, 0,
err_page->uri_values->elts)
== NULL)
{
return NGX_ERROR;
}
p = u.data;
uri = &u;
if (*p == '/') {
last = p + uri->len;
while (p < last) {
ch = *p++;
if (ch == '?') {
a.len = last - p;
a.data = p;
args = &a;
u.len = p - 1 - u.data;
while (p < last) {
if (*p++ == '\0') {
r->zero_in_uri = 1;
break;
}
}
break;
}
if (ch == '\0') {
r->zero_in_uri = 1;
continue;
}
}
}
} else {
uri = &err_page->uri;
}
if (uri->data[0] == '/') {
return ngx_http_internal_redirect(r, uri, args);
}
if (uri->data[0] == '@') {
return ngx_http_named_location(r, uri);
}
location = ngx_list_push(&r->headers_out.headers);
if (location == NULL) {
return NGX_ERROR;
}
r->err_status = NGX_HTTP_MOVED_TEMPORARILY;
location->hash = 1;
location->key.len = sizeof("Location") - 1;
location->key.data = (u_char *) "Location";
location->value = *uri;
r->headers_out.location = location;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (clcf->msie_refresh && r->headers_in.msie) {
return ngx_http_send_refresh(r);
}
return ngx_http_send_special_response(r, clcf, NGX_HTTP_MOVED_TEMPORARILY
- NGX_HTTP_MOVED_PERMANENTLY
+ NGX_HTTP_LEVEL_200);
}
static ngx_int_t
ngx_http_send_special_response(ngx_http_request_t *r,
ngx_http_core_loc_conf_t *clcf, ngx_uint_t err)
{
u_char *tail;
size_t len;
ngx_int_t rc;
ngx_buf_t *b;
ngx_uint_t msie_padding;
ngx_chain_t out[3];
if (clcf->server_tokens) {
len = sizeof(ngx_http_error_full_tail) - 1;
tail = ngx_http_error_full_tail;
} else {
len = sizeof(ngx_http_error_tail) - 1;
tail = ngx_http_error_tail;
}
msie_padding = 0;
if (!r->zero_body) {
if (ngx_http_error_pages[err].len) {
r->headers_out.content_length_n = ngx_http_error_pages[err].len
+ len;
if (clcf->msie_padding
&& r->headers_in.msie
&& r->http_version >= NGX_HTTP_VERSION_10
&& err >= NGX_HTTP_LEVEL_300)
{
r->headers_out.content_length_n +=
sizeof(ngx_http_msie_stub) - 1;
msie_padding = 1;
}
r->headers_out.content_type_len = sizeof("text/html") - 1;
r->headers_out.content_type.len = sizeof("text/html") - 1;
r->headers_out.content_type.data = (u_char *) "text/html";
} else {
r->headers_out.content_length_n = -1;
}
} else {
r->headers_out.content_length_n = 0;
err = 0;
}
if (r->headers_out.content_length) {
r->headers_out.content_length->hash = 0;
r->headers_out.content_length = NULL;
}
ngx_http_clear_accept_ranges(r);
ngx_http_clear_last_modified(r);
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || r->header_only) {
return rc;
}
if (ngx_http_error_pages[err].len == 0) {
return NGX_OK;
}
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
return NGX_ERROR;
}
b->memory = 1;
b->pos = ngx_http_error_pages[err].data;
b->last = ngx_http_error_pages[err].data + ngx_http_error_pages[err].len;
out[0].buf = b;
out[0].next = &out[1];
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
return NGX_ERROR;
}
b->memory = 1;
b->pos = tail;
b->last = tail + len;
out[1].buf = b;
out[1].next = NULL;;
if (msie_padding) {
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
return NGX_ERROR;
}
b->memory = 1;
b->pos = ngx_http_msie_stub;
b->last = ngx_http_msie_stub + sizeof(ngx_http_msie_stub) - 1;
out[1].next = &out[2];
out[2].buf = b;
out[2].next = NULL;;
}
if (r == r->main) {
b->last_buf = 1;
}
b->last_in_chain = 1;
return ngx_http_output_filter(r, &out[0]);
}
static ngx_int_t
ngx_http_send_refresh(ngx_http_request_t *r)
{
u_char *p, *location;
size_t len, size;
uintptr_t escape;
ngx_int_t rc;
ngx_buf_t *b;
ngx_chain_t out;
len = r->headers_out.location->value.len;
location = r->headers_out.location->value.data;
escape = 2 * ngx_escape_uri(NULL, location, len, NGX_ESCAPE_REFRESH);
size = sizeof(ngx_http_msie_refresh_head) - 1
+ escape + len
+ sizeof(ngx_http_msie_refresh_tail) - 1;
r->err_status = NGX_HTTP_OK;
r->headers_out.content_type_len = sizeof("text/html") - 1;
r->headers_out.content_type.len = sizeof("text/html") - 1;
r->headers_out.content_type.data = (u_char *) "text/html";
r->headers_out.location->hash = 0;
r->headers_out.location = NULL;
r->headers_out.content_length_n = size;
if (r->headers_out.content_length) {
r->headers_out.content_length->hash = 0;
r->headers_out.content_length = NULL;
}
ngx_http_clear_accept_ranges(r);
ngx_http_clear_last_modified(r);
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || r->header_only) {
return rc;
}
b = ngx_create_temp_buf(r->pool, size);
if (b == NULL) {
return NGX_ERROR;
}
p = ngx_cpymem(b->pos, ngx_http_msie_refresh_head,
sizeof(ngx_http_msie_refresh_head) - 1);
if (escape == 0) {
p = ngx_cpymem(p, location, len);
} else {
p = (u_char *) ngx_escape_uri(p, location, len, NGX_ESCAPE_REFRESH);
}
b->last = ngx_cpymem(p, ngx_http_msie_refresh_tail,
sizeof(ngx_http_msie_refresh_tail) - 1);
b->last_buf = 1;
b->last_in_chain = 1;
out.buf = b;
out.next = NULL;
return ngx_http_output_filter(r, &out);
}
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