Mercurial > hg > nginx-ranges

view src/http/ngx_http_special_response.c @ 34:aab2ea7c0458 NGINX_0_1_17

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
nginx 0.1.17 *) Change: the ngx_http_rewrite_module was rewritten from the scratch. Now it is possible to redirect, to return the error codes, to check the variables and referrers. The directives can be used inside locations. The redirect directive was canceled. *) Feature: the ngx_http_geo_module. *) Feature: the proxy_set_x_var and fastcgi_set_var directives. *) Bugfix: the location configuration with "=" modifier may be used in another location. *) Bugfix: the correct content type was set only for requests that use small caps letters in extension. *) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the location, and access was denied, and the error was redirected to a static page, then the segmentation fault occurred. *) Bugfix: if in a proxied "Location" header was a relative URL, then a host name and a slash were added to them; bug appeared in 0.1.14. *) Bugfix: the system error message was not logged on Linux.
author Igor Sysoev <http://sysoev.ru>
date Thu, 03 Feb 2005 00:00:00 +0300
parents 45fe5b98a9de
children a39d1b793287
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 */


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <nginx.h>


static u_char error_tail[] =
"<hr><center>" NGINX_VER "</center>" CRLF
"</body>" CRLF
"</html>" CRLF
;


static u_char 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 char 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 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 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 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 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 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 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 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 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 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 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 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 error_501_page[] =
"<html>" CRLF
"<head><title>501 Method Not Implemented</title></head>" CRLF
"<body bgcolor=\"white\">" CRLF
"<center><h1>500 Method Not Implemented</h1></center>" CRLF
;


static char 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 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 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 ngx_str_t error_pages[] = {
 /* ngx_null_string, */          /* 300 */
    ngx_string(error_301_page),
    ngx_string(error_302_page),
    ngx_null_string,             /* 303 */

    ngx_string(error_400_page),
    ngx_null_string,             /* 401 */
    ngx_null_string,             /* 402 */
    ngx_string(error_403_page),
    ngx_string(error_404_page),
    ngx_string(error_405_page),
    ngx_null_string,             /* 406 */
    ngx_null_string,             /* 407 */
    ngx_string(error_408_page),
    ngx_null_string,             /* 409 */
    ngx_null_string,             /* 410 */
    ngx_null_string,             /* 411 */
    ngx_null_string,             /* 412 */
    ngx_string(error_413_page),
    ngx_string(error_414_page),
    ngx_null_string,             /* 415 */
    ngx_string(error_416_page),

    ngx_string(error_497_page),  /* 497, http to https */
    ngx_string(error_404_page),  /* 498, invalid host name */
    ngx_null_string,             /* 499, client closed connection */

    ngx_string(error_500_page),
    ngx_string(error_501_page),
    ngx_string(error_502_page),
    ngx_string(error_503_page),
    ngx_string(error_504_page)
};


ngx_int_t ngx_http_special_response_handler(ngx_http_request_t *r, int error)
{
    ngx_int_t                  rc;
    ngx_uint_t                 err, i, msie_padding;
    ngx_buf_t                 *b;
    ngx_chain_t               *out, **ll, *cl;
    ngx_http_err_page_t       *err_page;
    ngx_http_core_loc_conf_t  *clcf;

    rc = ngx_http_discard_body(r);

    if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
        error = NGX_HTTP_INTERNAL_SERVER_ERROR;
    }

    r->headers_out.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_HTTP_INTERNAL_SERVER_ERROR:
                r->keepalive = 0;
        }
    }

    if (r->lingering_close == 1) {
        switch (error) {
            case NGX_HTTP_BAD_REQUEST:
            case NGX_HTTP_TO_HTTPS:
                r->lingering_close = 0;
        }
    }

    clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

    if (r->err_ctx == NULL && clcf->error_pages) {

        err_page = clcf->error_pages->elts;

        for (i = 0; i < clcf->error_pages->nelts; i++) {

            if (err_page[i].status == error) {

                if (err_page[i].overwrite) {
                    r->err_status = err_page[i].overwrite;
                } else {
                    r->err_status = error;
                }

                r->err_ctx = r->ctx;

                return ngx_http_internal_redirect(r, &err_page[i].uri, NULL);
            }
        }
    }

    if (error < NGX_HTTP_BAD_REQUEST) {
        /* 3XX */
        err = error - NGX_HTTP_MOVED_PERMANENTLY;

    } else if (error < NGX_HTTP_NGX_CODES) {
        /* 4XX */
        err = error - NGX_HTTP_BAD_REQUEST + 3;

    } else {
        /* 49X, 5XX */
        err = error - NGX_HTTP_NGX_CODES + 3 + 17;

        switch (error) {
            case NGX_HTTP_TO_HTTPS:
                r->headers_out.status = NGX_HTTP_BAD_REQUEST;
                error = NGX_HTTP_BAD_REQUEST;
                break;

            case NGX_HTTP_INVALID_HOST:
                r->headers_out.status = NGX_HTTP_NOT_FOUND;
                error = NGX_HTTP_NOT_FOUND;
                break;
        }
    }

    msie_padding = 0;

    if (error_pages[err].len) {
        r->headers_out.content_length_n = error_pages[err].len
                                          + sizeof(error_tail) - 1;

        if (clcf->msie_padding
            && r->headers_in.msie
            && r->http_version >= NGX_HTTP_VERSION_10
            && error >= NGX_HTTP_BAD_REQUEST
            && error != NGX_HTTP_REQUEST_URI_TOO_LARGE)
        {
            r->headers_out.content_length_n += sizeof(msie_stub) - 1;
            msie_padding = 1;
        }

        r->headers_out.content_type = ngx_list_push(&r->headers_out.headers);
        if (r->headers_out.content_type == NULL) {
            return NGX_ERROR;
        }

        r->headers_out.content_type->key.len = sizeof("Content-Type") - 1;
        r->headers_out.content_type->key.data = (u_char *) "Content-Type";
        r->headers_out.content_type->value.len = sizeof("text/html") - 1;
        r->headers_out.content_type->value.data = (u_char *) "text/html";

    } else {
        r->headers_out.content_length_n = -1;
    }

    if (r->headers_out.content_length) {
        r->headers_out.content_length->key.len = 0;
        r->headers_out.content_length = NULL;
    }

    rc = ngx_http_send_header(r);

    if (rc == NGX_ERROR || r->header_only) {
        return rc;
    }

    if (error_pages[err].len == 0) {
        return NGX_OK;
    }

    out = NULL;
    ll = NULL;

    if (!(b = ngx_calloc_buf(r->pool))) {
        return NGX_ERROR;
    }
    b->memory = 1;
    b->pos = error_pages[err].data;
    b->last = error_pages[err].data + error_pages[err].len;

    ngx_alloc_link_and_set_buf(cl, b, r->pool, NGX_ERROR);
    ngx_chain_add_link(out, ll, cl);


    if (!(b = ngx_calloc_buf(r->pool))) {
        return NGX_ERROR;
    }
    b->memory = 1;
    b->pos = error_tail;
    b->last = error_tail + sizeof(error_tail) - 1;

    ngx_alloc_link_and_set_buf(cl, b, r->pool, NGX_ERROR);
    ngx_chain_add_link(out, ll, cl);

    if (msie_padding) {
        if (!(b = ngx_calloc_buf(r->pool))) {
            return NGX_ERROR;
        }
        b->memory = 1;
        b->pos = msie_stub;
        b->last = msie_stub + sizeof(msie_stub) - 1;

        ngx_alloc_link_and_set_buf(cl, b, r->pool, NGX_ERROR);
        ngx_chain_add_link(out, ll, cl);
    }

    b->last_buf = 1;

    return ngx_http_output_filter(r, out);
}