int
errorMapStart(const errormap * map, request_t * client_req, HttpReply * reply, const char *aclname, ERRMAPCB * callback, void *callback_data)
{
char squid_error[100];
int len = 0;
const char *errorUrl;
ErrorMapState *state;
const char *tmp;
http_status status;
request_t *req;
HttpHeaderPos hdrpos;
HttpHeaderEntry *hdr;
if (!client_req || !reply)
return 0;
status = reply->sline.status;
tmp = httpHeaderGetStr(&reply->header, HDR_X_SQUID_ERROR);
squid_error[0] = '\0';
if (tmp) {
xstrncpy(squid_error, tmp, sizeof(squid_error));
len = strcspn(squid_error, " ");
}
squid_error[len] = '\0';
errorUrl = getErrorMap(map, status, squid_error, aclname);
if (!errorUrl)
return 0;
req = urlParse(urlMethodGetKnownByCode(METHOD_GET), (char *) errorUrl);
if (!req) {
debug(0, 0) ("errorMapStart: Invalid error URL '%s'\n", errorUrl);
return 0;
}
req->urlgroup = xstrdup("error");
state = cbdataAlloc(ErrorMapState);
state->req = requestLink(req);
state->e = storeCreateEntry(errorUrl, req->flags, req->method);
state->sc = storeClientRegister(state->e, state);
state->callback = callback;
state->callback_data = callback_data;
cbdataLock(callback_data);
hdrpos = HttpHeaderInitPos;
while ((hdr = httpHeaderGetEntry(&client_req->header, &hdrpos)) != NULL) {
if (CBIT_TEST(client_headers, hdr->id))
httpHeaderAddClone(&req->header, hdr);
}
hdrpos = HttpHeaderInitPos;
while ((hdr = httpHeaderGetEntry(&reply->header, &hdrpos)) != NULL) {
if (CBIT_TEST(server_headers, hdr->id))
httpHeaderAddClone(&req->header, hdr);
}
httpHeaderPutInt(&req->header, HDR_X_ERROR_STATUS, (int) reply->sline.status);
httpHeaderPutStr(&req->header, HDR_X_REQUEST_URI, urlCanonical(client_req));
fwdStart(-1, state->e, req);
storeClientRef(state->sc, state->e, 0, 0, SM_PAGE_SIZE, errorMapFetchHeaders, state);
return 1;
}
/* allocates and initializes an error response */
HttpReply *
errorBuildReply(ErrorState * err)
{
HttpReply *rep = httpReplyCreate();
const char *name = errorPageName(err->page_id);
/* no LMT for error pages; error pages expire immediately */
if (strchr(name, ':')) {
/* Redirection */
httpReplySetHeaders(rep, HTTP_MOVED_TEMPORARILY, NULL, "text/html", 0, -1, -1);
if (err->request) {
char *quoted_url = rfc1738_escape_part(urlCanonical(err->request));
httpHeaderPutStrf(&rep->header, HDR_LOCATION, name, quoted_url);
}
httpHeaderPutStrf(&rep->header, HDR_X_SQUID_ERROR, "%d %s", err->http_status, "Access Denied");
} else {
MemBuf content = errorBuildContent(err);
httpReplySetHeaders(rep, err->http_status, NULL, "text/html", content.size, -1, -1);
/*
* include some information for downstream caches. Implicit
* replaceable content. This isn't quite sufficient. xerrno is not
* necessarily meaningful to another system, so we really should
* expand it. Additionally, we should identify ourselves. Someone
* might want to know. Someone _will_ want to know OTOH, the first
* X-CACHE-MISS entry should tell us who.
*/
httpHeaderPutStrf(&rep->header, HDR_X_SQUID_ERROR, "%s %d",
name, err->xerrno);
httpBodySet(&rep->body, &content);
/* do not memBufClean() the content, it was absorbed by httpBody */
}
return rep;
}
static void asyncPrefetchTs(const char *url)
{
debug(207, 1) ("start asyncPrefetchTs async prefetch: '%s'\n", url);
request_t *request = NULL;
StoreEntry *entry = NULL;
request = modifyRequestUrlstoreUrl(url);
request->flags.cachable = CACHE;
if (storeGetPublicByRequest(request) != NULL) {
debug(207, 3) ("this entry has already exist,give up async prefetch: '%s'\n", request->store_url);
return;
}
entry = storeCreateEntry(urlCanonical(request),
request->flags,
request->method);
if (request->store_url)
storeEntrySetStoreUrl(entry, request->store_url);
if(Config.onoff.collapsed_forwarding)
{
EBIT_SET(entry->flags, KEY_EARLY_PUBLIC);
storeSetPublicKey(entry);
}
fwdStart(-1, entry, request);
requestUnlink(request);
}
static inline void modify_request(clientHttpRequest * http)
{
debug(97, 3)("modify_request: start, uri=[%s]\n", http->uri);
request_t* old_request = http->request;
request_t* new_request = urlParse(old_request->method, http->uri);
safe_free(http->uri);
if (new_request)
{
safe_free(http->uri);
http->uri = xstrdup(urlCanonical(new_request));
if(!http->log_uri)
http->log_uri = xstrdup(urlCanonicalClean(old_request));
new_request->http_ver = old_request->http_ver;
httpHeaderAppend(&new_request->header, &old_request->header);
new_request->client_addr = old_request->client_addr;
new_request->client_port = old_request->client_port;
#if FOLLOW_X_FORWARDED_FOR
new_request->indirect_client_addr = old_request->indirect_client_addr;
#endif /* FOLLOW_X_FORWARDED_FOR */
new_request->my_addr = old_request->my_addr;
new_request->my_port = old_request->my_port;
new_request->flags = old_request->flags;
new_request->flags.redirected = 1;
if (old_request->auth_user_request)
{
new_request->auth_user_request = old_request->auth_user_request;
authenticateAuthUserRequestLock(new_request->auth_user_request);
}
if (old_request->body_reader)
{
new_request->body_reader = old_request->body_reader;
new_request->body_reader_data = old_request->body_reader_data;
old_request->body_reader = NULL;
old_request->body_reader_data = NULL;
}
new_request->content_length = old_request->content_length;
if (strBuf(old_request->extacl_log))
new_request->extacl_log = stringDup(&old_request->extacl_log);
if (old_request->extacl_user)
new_request->extacl_user = xstrdup(old_request->extacl_user);
if (old_request->extacl_passwd)
new_request->extacl_passwd = xstrdup(old_request->extacl_passwd);
if(old_request->cc_request_private_data)
{
new_request->cc_request_private_data = old_request->cc_request_private_data;
old_request->cc_request_private_data = NULL;
}
requestUnlink(old_request);
http->request = requestLink(new_request);
}
}
static request_t *
modifyRequestUrlstoreUrl(const char *url)
{
request_t *new_request = NULL;
new_request = urlParse(METHOD_GET, (char*)url);
char *new_storeurl = xstrdup((const char *)url);
char* str = strchr(new_storeurl, '?');
if (str) {
debug(207, 3)("modify_request_url_storeurl rid_question: storeurl=[%s] have question\n", new_storeurl);
*str = '\0';
}
new_request->store_url = xstrdup((const char *)new_storeurl);
debug(207, 3)("after modifyRequestUrlstoreUrl url=%s,storeurl=%s,uri=%s\n",urlCanonical(new_request),new_request->store_url,strBuf(new_request->urlpath));
return requestLink(new_request);
}
/* packs debug info, canonical request-line and headers, appends <crlf> terminator */
void
httpRequestPackDebug(request_t * req, Packer * p)
{
assert(req && p);
/* Client info */
packerPrintf(p, "Client: %s ", inet_ntoa(req->client_addr));
packerPrintf(p, "http_port: %s:%d", inet_ntoa(req->my_addr), req->my_port);
if (req->auth_user_request && authenticateUserRequestUsername(req->auth_user_request))
packerPrintf(p, "user: %s", authenticateUserRequestUsername(req->auth_user_request));
packerPrintf(p, "\n");
/* pack request-line */
packerPrintf(p, "%s %s HTTP/%d.%d\r\n",
RequestMethodStr[req->method], urlCanonical(req), req->http_ver.major, req->http_ver.minor);
/* headers */
httpHeaderPackInto(&req->header, p);
/* trailer */
packerAppend(p, "\r\n", 2);
}
peer *
carpSelectParent(request_t * request)
{
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> ((sizeof(u_long)*8)-(n))))
const char *c;
peer *p = NULL;
peer *tp;
unsigned long url_hash = 0;
unsigned long combined_hash;
unsigned long high_score = 0;
const char *url = urlCanonical(request);
/* calculate url hash */
debug(39, 2) ("carpSelectParent: CARP Calculating hash for %s\n", url);
for (c = url; *c != 0; c++)
url_hash += ROTATE_LEFT(url_hash, 19) + *c;
/* select peer */
for (tp = Config.peers; tp; tp = tp->next) {
if (0.0 == tp->carp.load_factor)
continue;
if (tp->tcp_up != PEER_TCP_MAGIC_COUNT)
continue;
assert(tp->type == PEER_PARENT);
combined_hash = (url_hash ^ tp->carp.hash);
combined_hash += combined_hash * 0x62531965;
combined_hash = ROTATE_LEFT(combined_hash, 21);
combined_hash = combined_hash * tp->carp.load_multiplier;
debug(39, 3) ("carpSelectParent: %s combined_hash %d\n",
tp->host, combined_hash);
if ((combined_hash > high_score) && neighborUp(tp)) {
p = tp;
high_score = combined_hash;
}
}
if (p)
debug(39, 3) ("carpSelectParent: selected CARP %s\n", p->host);
return p;
}
static const char *
errorConvert(char token, ErrorState * err)
{
request_t *r = err->request;
static MemBuf mb = MemBufNULL;
const char *p = NULL; /* takes priority over mb if set */
int do_quote = 1;
memBufReset(&mb);
switch (token) {
case 'a':
if (r && r->auth_user_request)
p = authenticateUserRequestUsername(r->auth_user_request);
if (!p)
p = "-";
break;
case 'B':
p = r ? ftpUrlWith2f(r) : "[no URL]";
break;
case 'c':
p = errorPageName(err->type);
break;
case 'e':
memBufPrintf(&mb, "%d", err->xerrno);
break;
case 'E':
if (err->xerrno)
memBufPrintf(&mb, "(%d) %s", err->xerrno, strerror(err->xerrno));
else
memBufPrintf(&mb, "[No Error]");
break;
case 'f':
/* FTP REQUEST LINE */
if (err->ftp.request)
p = err->ftp.request;
else
p = "nothing";
break;
case 'F':
/* FTP REPLY LINE */
if (err->ftp.request)
p = err->ftp.reply;
else
p = "nothing";
break;
case 'g':
/* FTP SERVER MESSAGE */
wordlistCat(err->ftp.server_msg, &mb);
break;
case 'h':
memBufPrintf(&mb, "%s", getMyHostname());
break;
case 'H':
if (r) {
if (r->hier.host)
p = r->hier.host;
else
p = r->host;
} else
p = "[unknown host]";
break;
case 'i':
memBufPrintf(&mb, "%s", inet_ntoa(err->src_addr));
break;
case 'I':
if (r && r->hier.host) {
memBufPrintf(&mb, "%s", r->hier.host);
} else
p = "[unknown]";
break;
case 'L':
if (Config.errHtmlText) {
memBufPrintf(&mb, "%s", Config.errHtmlText);
do_quote = 0;
} else
p = "[not available]";
break;
case 'm':
p = authenticateAuthUserRequestMessage(err->auth_user_request) ? authenticateAuthUserRequestMessage(err->auth_user_request) : "[not available]";
break;
case 'M':
p = r ? RequestMethods[r->method].str : "[unknown method]";
break;
case 'o':
p = external_acl_message;
if (!p)
p = "[not available]";
break;
case 'p':
if (r) {
memBufPrintf(&mb, "%d", (int) r->port);
} else {
p = "[unknown port]";
}
break;
case 'P':
p = r ? ProtocolStr[r->protocol] : "[unkown protocol]";
break;
case 'R':
if (NULL != r) {
Packer p;
memBufPrintf(&mb, "%s %s HTTP/%d.%d\n",
RequestMethods[r->method].str,
strLen(r->urlpath) ? strBuf(r->urlpath) : "/",
r->http_ver.major, r->http_ver.minor);
packerToMemInit(&p, &mb);
httpHeaderPackInto(&r->header, &p);
packerClean(&p);
} else if (err->request_hdrs) {
p = err->request_hdrs;
} else {
p = "[no request]";
}
break;
case 's':
p = visible_appname_string;
break;
case 'S':
/* signature may contain %-escapes, recursion */
if (err->page_id != ERR_SQUID_SIGNATURE) {
const int saved_id = err->page_id;
MemBuf sign_mb;
err->page_id = ERR_SQUID_SIGNATURE;
sign_mb = errorBuildContent(err);
memBufPrintf(&mb, "%s", sign_mb.buf);
memBufClean(&sign_mb);
err->page_id = saved_id;
do_quote = 0;
} else {
/* wow, somebody put %S into ERR_SIGNATURE, stop recursion */
p = "[%S]";
}
break;
case 't':
memBufPrintf(&mb, "%s", mkhttpdlogtime(&squid_curtime));
break;
case 'T':
memBufPrintf(&mb, "%s", mkrfc1123(squid_curtime));
break;
case 'U':
p = r ? urlCanonicalClean(r) : err->url ? err->url : "[no URL]";
break;
case 'u':
p = r ? urlCanonical(r) : err->url ? err->url : "[no URL]";
break;
case 'w':
if (Config.adminEmail)
memBufPrintf(&mb, "%s", Config.adminEmail);
else
p = "[unknown]";
break;
case 'z':
if (err->dnsserver_msg)
p = err->dnsserver_msg;
else
p = "[unknown]";
break;
case '%':
p = "%";
break;
default:
memBufPrintf(&mb, "%%%c", token);
do_quote = 0;
break;
}
if (!p)
p = mb.buf; /* do not use mb after this assignment! */
assert(p);
debug(4, 3) ("errorConvert: %%%c --> '%s'\n", token, p);
if (do_quote)
p = html_quote(p);
return p;
}
/* return 1 if the entry must be revalidated within delta seconds
* 0 otherwise
*
* note: request maybe null (e.g. for cache digests build)
*/
static int
refreshCheck(const StoreEntry * entry, request_t * request, time_t delta)
{
const refresh_t *R;
const char *uri = NULL;
time_t age = 0;
time_t check_time = squid_curtime;
int staleness;
stale_flags sf;
if (entry->mem_obj)
uri = entry->mem_obj->url;
else if (request)
uri = urlCanonical(request);
debug(22, 3) ("refreshCheck: '%s'\n", uri ? uri : "<none>");
if (delta > 0)
check_time += delta;
if (check_time > entry->timestamp)
age = check_time - entry->timestamp;
R = uri ? refreshLimits(uri) : refreshUncompiledPattern(".");
if (NULL == R)
R = &DefaultRefresh;
memset(&sf, '\0', sizeof(sf));
staleness = refreshStaleness(entry, check_time, age, R, &sf);
debug(22, 3) ("Staleness = %d\n", staleness);
debug(22, 3) ("refreshCheck: Matched '%s %d %d%% %d'\n",
R->pattern, (int) R->min, (int) (100.0 * R->pct), (int) R->max);
debug(22, 3) ("refreshCheck: age = %d\n", (int) age);
debug(22, 3) ("\tcheck_time:\t%s\n", mkrfc1123(check_time));
debug(22, 3) ("\tentry->timestamp:\t%s\n", mkrfc1123(entry->timestamp));
if (EBIT_TEST(entry->flags, ENTRY_REVALIDATE) && staleness > -1) {
debug(22, 3) ("refreshCheck: YES: Must revalidate stale response\n");
return STALE_MUST_REVALIDATE;
}
/* request-specific checks */
if (request) {
HttpHdrCc *cc = request->cache_control;
#if HTTP_VIOLATIONS
if (!request->flags.nocache_hack) {
(void) 0;
} else if (R->flags.ignore_reload) {
/* The clients no-cache header is ignored */
debug(22, 3) ("refreshCheck: MAYBE: ignore-reload\n");
} else if (R->flags.reload_into_ims || Config.onoff.reload_into_ims) {
/* The clients no-cache header is changed into a IMS query */
debug(22, 3) ("refreshCheck: YES: reload-into-ims\n");
return STALE_RELOAD_INTO_IMS;
} else {
/* The clients no-cache header is not overridden on this request */
debug(22, 3) ("refreshCheck: YES: client reload\n");
request->flags.nocache = 1;
return STALE_FORCED_RELOAD;
}
#endif
if (NULL != cc) {
if (cc->max_age > -1) {
#if HTTP_VIOLATIONS
if (R->flags.ignore_reload && cc->max_age == 0) {
} else
#endif
if (age > cc->max_age) {
debug(22, 3) ("refreshCheck: YES: age > client-max-age\n");
return STALE_EXCEEDS_REQUEST_MAX_AGE_VALUE;
}
}
if (EBIT_TEST(cc->mask, CC_MAX_STALE) && staleness >= 0) {
if (cc->max_stale < 0) {
/* max-stale directive without a value */
debug(22, 3) ("refreshCheck: NO: max-stale wildcard\n");
return FRESH_REQUEST_MAX_STALE_ALL;
} else if (staleness < cc->max_stale) {
debug(22, 3) ("refreshCheck: NO: staleness < max-stale\n");
return FRESH_REQUEST_MAX_STALE_VALUE;
}
}
}
}
if (staleness < 0) {
if (sf.expires)
return FRESH_EXPIRES;
assert(!sf.max);
if (sf.lmfactor)
return FRESH_LMFACTOR_RULE;
assert(sf.min);
return FRESH_MIN_RULE;
}
/*
* At this point the response is stale, unless one of
* the override options kicks in.
*/
if (delta < 0 && staleness + delta < 0) {
return STALE_WITHIN_DELTA;
}
if (sf.expires) {
#if HTTP_VIOLATIONS
if (R->flags.override_expire && age < R->min) {
debug(22, 3) ("refreshCheck: NO: age < min && override-expire\n");
return FRESH_OVERRIDE_EXPIRES;
}
#endif
return STALE_EXPIRES;
}
if (sf.max)
return STALE_MAX_RULE;
if (sf.lmfactor) {
#if HTTP_VIOLATIONS
if (R->flags.override_lastmod && age < R->min) {
debug(22, 3) ("refreshCheck: NO: age < min && override-lastmod\n");
return FRESH_OVERRIDE_LASTMOD;
}
#endif
return STALE_LMFACTOR_RULE;
}
return STALE_DEFAULT;
}
