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/*-
* Copyright (c) 2007 Linpro AS
* All rights reserved.
*
* Author: Dag-Erling Smørgrav <des@linpro.no>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: cache_synthetic.c 2142 2007-10-19 11:33:23Z des $
*/
#include <sys/types.h>
#include <sys/time.h>
#include <stdlib.h>
#include "shmlog.h"
#include "heritage.h"
#include "cache.h"
/*
* Synthesize an error page. This assumes the session already has an
* object - if it doesn't, you need to either call HSH_Lookup(), or call
* HSH_Prealloc() and grab sp->obj->nobj, before calling this.
*/
void
SYN_ErrorPage(struct sess *sp, int status, const char *reason, int ttl)
{
struct storage *st;
struct object *o;
struct worker *w;
struct http *h;
struct vsb vsb;
const char *msg;
char date[40];
double now;
int fd;
WSL_Flush(sp->wrk);
assert(status >= 100 && status <= 999);
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(sp->wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(sp->obj, OBJECT_MAGIC);
CHECK_OBJ_NOTNULL(&sp->obj->http, HTTP_MAGIC);
assert(sp->obj->busy > 0);
/* shortcuts */
w = sp->wrk;
fd = sp->fd;
o = sp->obj;
h = &o->http;
now = TIM_real();
/* look up HTTP response */
msg = http_StatusMessage(status);
if (reason == NULL)
reason = msg;
AN(reason);
AN(msg);
/* populate metadata */
o->response = status;
o->valid = 1;
o->entered = now;
o->ttl = now + ttl;
o->last_modified = now;
o->xid = sp->xid;
/* allocate space for body */
/* XXX what if the object already has a body? */
st = STV_alloc(1024);
XXXAN(st->stevedore);
VTAILQ_INSERT_TAIL(&sp->obj->store, st, list);
/* generate body */
vsb_new(&vsb, (char *)st->ptr, st->space, VSB_FIXEDLEN);
vsb_printf(&vsb,
"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"\n"
" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n"
"<html>\n"
" <head>\n"
" <title>%03d %s</title>\n", status, msg);
vsb_printf(&vsb,
" </head>\n"
" <body>\n"
" <h1>Error %03d %s</h1>\n", status, msg);
vsb_printf(&vsb,
" <p>%s</p>\n", reason);
vsb_printf(&vsb,
" <h3>Guru Meditation:</h3>\n"
" <p>XID: %u</p>\n", sp->xid);
vsb_printf(&vsb,
" <address><a href=\"http://www.varnish-cache.org/\">Varnish</a></address>\n"
" </body>\n"
"</html>\n");
vsb_finish(&vsb);
o->len = st->len = vsb_len(&vsb);
vsb_delete(&vsb);
/* allocate space for header */
WS_Init(h->ws, malloc(1024), 1024);
/* generate header */
http_ClrHeader(h);
http_PutProtocol(w, fd, h, "HTTP/1.0"); /* XXX */
http_PutStatus(w, fd, h, status);
http_PutResponse(w, fd, h, msg);
TIM_format(now, date);
http_PrintfHeader(w, fd, h, "Date: %s", date);
http_PrintfHeader(w, fd, h, "Server: Varnish");
http_PrintfHeader(w, fd, h, "Retry-After: %ju", (uintmax_t)ttl);
http_PrintfHeader(w, fd, h, "Content-Type: text/html; charset=utf-8");
http_PrintfHeader(w, fd, h, "Content-Length: %u", o->len);
/* DO NOT generate X-Varnish header, RES_BuildHttp will */
}
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