static int
cnt_fetch(struct sess *sp)
{
int i, transient;
struct http *hp, *hp2;
char *b;
unsigned handling;
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(sp->vcl, VCL_CONF_MAGIC);
AN(sp->director);
AZ(sp->vbe);
/* sp->wrk->http[0] is (still) bereq */
sp->wrk->beresp = &sp->wrk->http[1];
http_Setup(sp->wrk->beresp, sp->wrk->ws);
i = FetchHdr(sp);
/*
* Save a copy before it might get mangled in VCL. When it comes to
* dealing with the body, we want to see the unadultered headers.
*/
sp->wrk->beresp1 = &sp->wrk->http[2];
*sp->wrk->beresp1 = *sp->wrk->beresp;
if (i) {
if (sp->objhead) {
CHECK_OBJ_NOTNULL(sp->objhead, OBJHEAD_MAGIC);
CHECK_OBJ_NOTNULL(sp->objcore, OBJCORE_MAGIC);
HSH_DerefObjCore(sp);
}
AZ(sp->obj);
sp->wrk->bereq = NULL;
sp->wrk->beresp = NULL;
sp->wrk->beresp1 = NULL;
sp->err_code = 503;
sp->step = STP_ERROR;
return (0);
}
sp->err_code = http_GetStatus(sp->wrk->beresp);
/*
* Initial cacheability determination per [RFC2616, 13.4]
* We do not support ranges yet, so 206 is out.
*/
switch (sp->err_code) {
case 200: /* OK */
case 203: /* Non-Authoritative Information */
case 300: /* Multiple Choices */
case 301: /* Moved Permanently */
case 302: /* Moved Temporarily */
case 410: /* Gone */
case 404: /* Not Found */
sp->wrk->cacheable = 1;
break;
default:
sp->wrk->cacheable = 0;
break;
}
sp->wrk->entered = TIM_real();
sp->wrk->age = 0;
sp->wrk->ttl = RFC2616_Ttl(sp);
if (sp->wrk->ttl == 0.)
sp->wrk->cacheable = 0;
sp->wrk->do_esi = 0;
sp->wrk->grace = NAN;
VCL_fetch_method(sp);
/*
* When we fetch the body, we may hit the LRU cleanup and that
* will overwrite sp->handling, so we have to save our plans
* here.
*/
handling = sp->handling;
if (sp->objhead == NULL)
transient = 1;
else if (sp->handling == VCL_RET_DELIVER)
transient = 0;
else
transient = 1;
/*
* XXX: If we have a Length: header, we should allocate the body
* XXX: also.
*/
sp->obj = HSH_NewObject(sp, transient);
if (sp->objhead != NULL) {
CHECK_OBJ_NOTNULL(sp->objhead, OBJHEAD_MAGIC);
CHECK_OBJ_NOTNULL(sp->objcore, OBJCORE_MAGIC);
sp->objcore->obj = sp->obj;
sp->obj->objcore = sp->objcore;
sp->obj->objhead = sp->objhead;
sp->objhead = NULL; /* refcnt follows pointer. */
sp->objcore = NULL; /* refcnt follows pointer. */
}
BAN_NewObj(sp->obj);
sp->obj->xid = sp->xid;
sp->obj->response = sp->err_code;
sp->obj->cacheable = sp->wrk->cacheable;
sp->obj->ttl = sp->wrk->ttl;
sp->obj->grace = sp->wrk->grace;
if (sp->obj->ttl == 0. && sp->obj->grace == 0.)
sp->obj->cacheable = 0;
sp->obj->age = sp->wrk->age;
sp->obj->entered = sp->wrk->entered;
WS_Assert(sp->obj->ws_o);
/* Filter into object */
hp = sp->wrk->beresp;
hp2 = sp->obj->http;
hp2->logtag = HTTP_Obj;
http_CopyResp(hp2, hp);
http_FilterFields(sp->wrk, sp->fd, hp2, hp, HTTPH_A_INS);
http_CopyHome(sp->wrk, sp->fd, hp2);
if (http_GetHdr(hp, H_Last_Modified, &b))
sp->obj->last_modified = TIM_parse(b);
i = FetchBody(sp);
AZ(sp->wrk->wfd);
AZ(sp->vbe);
AN(sp->director);
if (i) {
HSH_Drop(sp);
AZ(sp->obj);
sp->wrk->bereq = NULL;
sp->wrk->beresp = NULL;
sp->wrk->beresp1 = NULL;
sp->err_code = 503;
sp->step = STP_ERROR;
return (0);
}
if (!transient)
HSH_Object(sp);
if (sp->wrk->do_esi)
ESI_Parse(sp);
switch (handling) {
case VCL_RET_RESTART:
HSH_Drop(sp);
sp->director = NULL;
sp->restarts++;
sp->wrk->bereq = NULL;
sp->wrk->beresp = NULL;
sp->wrk->beresp1 = NULL;
sp->step = STP_RECV;
return (0);
case VCL_RET_PASS:
if (sp->obj->objcore != NULL)
sp->obj->objcore->flags |= OC_F_PASS;
if (sp->obj->ttl - sp->t_req < params->default_ttl)
sp->obj->ttl = sp->t_req + params->default_ttl;
break;
case VCL_RET_DELIVER:
break;
case VCL_RET_ERROR:
HSH_Drop(sp);
sp->wrk->bereq = NULL;
sp->wrk->beresp = NULL;
sp->wrk->beresp1 = NULL;
sp->step = STP_ERROR;
return (0);
default:
WRONG("Illegal action in vcl_fetch{}");
}
sp->obj->cacheable = 1;
if (sp->obj->objhead != NULL) {
VRY_Create(sp);
EXP_Insert(sp->obj);
AN(sp->obj->ban);
HSH_Unbusy(sp);
}
sp->acct_req.fetch++;
sp->wrk->bereq = NULL;
sp->wrk->beresp = NULL;
sp->wrk->beresp1 = NULL;
sp->step = STP_DELIVER;
return (0);
}
static int
cnt_fetchbody(struct sess *sp)
{
int i;
struct http *hp, *hp2;
char *b;
uint16_t nhttp;
unsigned l;
struct vsb *vary = NULL;
int varyl = 0, pass;
struct worker *wrk;
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
wrk = sp->wrk;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(wrk->busyobj, BUSYOBJ_MAGIC);
assert(sp->handling == VCL_RET_HIT_FOR_PASS ||
sp->handling == VCL_RET_DELIVER);
if (wrk->objcore == NULL) {
/* This is a pass from vcl_recv */
pass = 1;
/* VCL may have fiddled this, but that doesn't help */
wrk->busyobj->exp.ttl = -1.;
} else if (sp->handling == VCL_RET_HIT_FOR_PASS) {
/* pass from vcl_fetch{} -> hit-for-pass */
/* XXX: the bereq was not filtered pass... */
pass = 1;
} else {
/* regular object */
pass = 0;
}
/*
* The VCL variables beresp.do_g[un]zip tells us how we want the
* object processed before it is stored.
*
* The backend Content-Encoding header tells us what we are going
* to receive, which we classify in the following three classes:
*
* "Content-Encoding: gzip" --> object is gzip'ed.
* no Content-Encoding --> object is not gzip'ed.
* anything else --> do nothing wrt gzip
*
*/
/* We do nothing unless the param is set */
if (!cache_param->http_gzip_support)
wrk->busyobj->do_gzip = wrk->busyobj->do_gunzip = 0;
wrk->busyobj->is_gzip =
http_HdrIs(wrk->busyobj->beresp, H_Content_Encoding, "gzip");
wrk->busyobj->is_gunzip =
!http_GetHdr(wrk->busyobj->beresp, H_Content_Encoding, NULL);
/* It can't be both */
assert(wrk->busyobj->is_gzip == 0 || wrk->busyobj->is_gunzip == 0);
/* We won't gunzip unless it is gzip'ed */
if (wrk->busyobj->do_gunzip && !wrk->busyobj->is_gzip)
wrk->busyobj->do_gunzip = 0;
/* If we do gunzip, remove the C-E header */
if (wrk->busyobj->do_gunzip)
http_Unset(wrk->busyobj->beresp, H_Content_Encoding);
/* We wont gzip unless it is ungziped */
if (wrk->busyobj->do_gzip && !wrk->busyobj->is_gunzip)
wrk->busyobj->do_gzip = 0;
/* If we do gzip, add the C-E header */
if (wrk->busyobj->do_gzip)
http_SetHeader(wrk, sp->vsl_id, wrk->busyobj->beresp,
"Content-Encoding: gzip");
/* But we can't do both at the same time */
assert(wrk->busyobj->do_gzip == 0 || wrk->busyobj->do_gunzip == 0);
/* ESI takes precedence and handles gzip/gunzip itself */
if (wrk->busyobj->do_esi)
wrk->busyobj->vfp = &vfp_esi;
else if (wrk->busyobj->do_gunzip)
wrk->busyobj->vfp = &vfp_gunzip;
else if (wrk->busyobj->do_gzip)
wrk->busyobj->vfp = &vfp_gzip;
else if (wrk->busyobj->is_gzip)
wrk->busyobj->vfp = &vfp_testgzip;
if (wrk->busyobj->do_esi || sp->esi_level > 0)
wrk->busyobj->do_stream = 0;
if (!sp->wantbody)
wrk->busyobj->do_stream = 0;
l = http_EstimateWS(wrk->busyobj->beresp,
pass ? HTTPH_R_PASS : HTTPH_A_INS, &nhttp);
/* Create Vary instructions */
if (wrk->objcore != NULL) {
CHECK_OBJ_NOTNULL(wrk->objcore, OBJCORE_MAGIC);
vary = VRY_Create(sp, wrk->busyobj->beresp);
if (vary != NULL) {
varyl = VSB_len(vary);
assert(varyl > 0);
l += varyl;
}
}
/*
* Space for producing a Content-Length: header including padding
* A billion gigabytes is enough for anybody.
*/
l += strlen("Content-Length: XxxXxxXxxXxxXxxXxx") + sizeof(void *);
if (wrk->busyobj->exp.ttl < cache_param->shortlived ||
wrk->objcore == NULL)
wrk->storage_hint = TRANSIENT_STORAGE;
wrk->obj = STV_NewObject(wrk, wrk->storage_hint, l, nhttp);
if (wrk->obj == NULL) {
/*
* Try to salvage the transaction by allocating a
* shortlived object on Transient storage.
*/
wrk->obj = STV_NewObject(wrk, TRANSIENT_STORAGE, l, nhttp);
if (wrk->busyobj->exp.ttl > cache_param->shortlived)
wrk->busyobj->exp.ttl = cache_param->shortlived;
wrk->busyobj->exp.grace = 0.0;
wrk->busyobj->exp.keep = 0.0;
}
if (wrk->obj == NULL) {
sp->err_code = 503;
sp->step = STP_ERROR;
VDI_CloseFd(wrk, &wrk->busyobj->vbc);
VBO_DerefBusyObj(wrk, &wrk->busyobj);
return (0);
}
CHECK_OBJ_NOTNULL(wrk->obj, OBJECT_MAGIC);
wrk->storage_hint = NULL;
if (wrk->busyobj->do_gzip ||
(wrk->busyobj->is_gzip && !wrk->busyobj->do_gunzip))
wrk->obj->gziped = 1;
if (vary != NULL) {
wrk->obj->vary = (void *)WS_Alloc(wrk->obj->http->ws, varyl);
AN(wrk->obj->vary);
memcpy(wrk->obj->vary, VSB_data(vary), varyl);
VRY_Validate(wrk->obj->vary);
VSB_delete(vary);
}
wrk->obj->xid = sp->xid;
wrk->obj->response = sp->err_code;
WS_Assert(wrk->obj->ws_o);
/* Filter into object */
hp = wrk->busyobj->beresp;
hp2 = wrk->obj->http;
hp2->logtag = HTTP_Obj;
http_CopyResp(hp2, hp);
http_FilterFields(wrk, sp->vsl_id, hp2, hp,
pass ? HTTPH_R_PASS : HTTPH_A_INS);
http_CopyHome(wrk, sp->vsl_id, hp2);
if (http_GetHdr(hp, H_Last_Modified, &b))
wrk->obj->last_modified = VTIM_parse(b);
else
wrk->obj->last_modified = floor(wrk->busyobj->exp.entered);
assert(WRW_IsReleased(wrk));
/*
* If we can deliver a 304 reply, we don't bother streaming.
* Notice that vcl_deliver{} could still nuke the headers
* that allow the 304, in which case we return 200 non-stream.
*/
if (wrk->obj->response == 200 &&
sp->http->conds &&
RFC2616_Do_Cond(sp))
wrk->busyobj->do_stream = 0;
AssertObjCorePassOrBusy(wrk->obj->objcore);
if (wrk->busyobj->do_stream) {
sp->step = STP_PREPRESP;
return (0);
}
/* Use unmodified headers*/
i = FetchBody(wrk, wrk->obj);
http_Setup(wrk->busyobj->bereq, NULL);
http_Setup(wrk->busyobj->beresp, NULL);
wrk->busyobj->vfp = NULL;
assert(WRW_IsReleased(wrk));
AZ(wrk->busyobj->vbc);
AN(sp->director);
if (i) {
HSH_Drop(wrk);
VBO_DerefBusyObj(wrk, &wrk->busyobj);
AZ(wrk->obj);
sp->err_code = 503;
sp->step = STP_ERROR;
return (0);
}
if (wrk->obj->objcore != NULL) {
EXP_Insert(wrk->obj);
AN(wrk->obj->objcore);
AN(wrk->obj->objcore->ban);
HSH_Unbusy(wrk);
}
VBO_DerefBusyObj(wrk, &wrk->busyobj);
wrk->acct_tmp.fetch++;
sp->step = STP_PREPRESP;
return (0);
}
