vdi_simple_gethdrs(const struct director *d, struct worker *wrk,
struct busyobj *bo)
{
int i;
CHECK_OBJ_NOTNULL(d, DIRECTOR_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
bo->vbc = VDI_GetFd(d, wrk, bo);
if (bo->vbc == NULL) {
VSLb(bo->vsl, SLT_FetchError, "no backend connection");
return (-1);
}
i = V1F_fetch_hdr(wrk, bo);
/*
* If we recycle a backend connection, there is a finite chance
* that the backend closed it before we get a request to it.
* Do a single retry in that case.
*/
if (i == 1) {
AZ(bo->vbc);
VSC_C_main->backend_retry++;
bo->vbc = VDI_GetFd(d, wrk, bo);
if (bo->vbc == NULL) {
VSLb(bo->vsl, SLT_FetchError, "no backend connection");
return (-1);
}
i = V1F_fetch_hdr(wrk, bo);
}
if (i != 0)
AZ(bo->vbc);
else
AN(bo->vbc);
return (i);
}
static enum fetch_step
vbf_stp_fetchhdr(struct worker *wrk, struct busyobj *bo)
{
int i;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
xxxassert (wrk->handling == VCL_RET_FETCH);
HTTP_Setup(bo->beresp, bo->ws, bo->vsl, HTTP_Beresp);
if (!bo->do_pass)
vbf_release_req(bo); /* XXX: retry ?? */
assert(bo->state == BOS_INVALID);
i = V1F_fetch_hdr(wrk, bo, bo->req);
/*
* If we recycle a backend connection, there is a finite chance
* that the backend closed it before we get a request to it.
* Do a single retry in that case.
*/
if (i == 1) {
VSC_C_main->backend_retry++;
i = V1F_fetch_hdr(wrk, bo, bo->req);
}
if (bo->do_pass)
vbf_release_req(bo); /* XXX : retry ?? */
AZ(bo->req);
if (i) {
AZ(bo->vbc);
bo->err_code = 503;
http_SetH(bo->beresp, HTTP_HDR_PROTO, "HTTP/1.1");
http_SetResp(bo->beresp,
"HTTP/1.1", 503, "Backend fetch failed");
http_SetHeader(bo->beresp, "Content-Length: 0");
http_SetHeader(bo->beresp, "Connection: close");
} else {
AN(bo->vbc);
}
/*
* These two headers can be spread over multiple actual headers
* and we rely on their content outside of VCL, so collect them
* into one line here.
*/
http_CollectHdr(bo->beresp, H_Cache_Control);
http_CollectHdr(bo->beresp, H_Vary);
/*
* Figure out how the fetch is supposed to happen, before the
* headers are adultered by VCL
* NB: Also sets other wrk variables
*/
bo->htc.body_status = RFC2616_Body(bo, &wrk->stats);
bo->err_code = http_GetStatus(bo->beresp);
/*
* What does RFC2616 think about TTL ?
*/
EXP_Clr(&bo->exp);
bo->exp.entered = W_TIM_real(wrk);
RFC2616_Ttl(bo);
/* pass from vclrecv{} has negative TTL */
if (bo->fetch_objcore->objhead == NULL)
bo->exp.ttl = -1.;
AZ(bo->do_esi);
VCL_backend_response_method(bo->vcl, wrk, NULL, bo, bo->beresp->ws);
if (bo->do_esi)
bo->do_stream = 0;
if (wrk->handling == VCL_RET_DELIVER)
return (F_STP_FETCH);
if (wrk->handling == VCL_RET_RETRY) {
assert(bo->state == BOS_INVALID);
bo->retries++;
if (bo->retries <= cache_param->max_retries) {
VDI_CloseFd(&bo->vbc);
return (F_STP_STARTFETCH);
}
// XXX: wrk->handling = VCL_RET_SYNTH;
}
return (F_STP_NOTYET);
}
static enum fetch_step
vbf_stp_fetchhdr(struct worker *wrk, struct busyobj *bo)
{
int i, do_ims;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
xxxassert (wrk->handling == VCL_RET_FETCH);
HTTP_Setup(bo->beresp, bo->ws, bo->vsl, HTTP_Beresp);
if (!bo->do_pass && bo->req != NULL)
vbf_release_req(bo); /* XXX: retry ?? */
assert(bo->state <= BOS_REQ_DONE);
i = V1F_fetch_hdr(wrk, bo, bo->req);
/*
* If we recycle a backend connection, there is a finite chance
* that the backend closed it before we get a request to it.
* Do a single retry in that case.
*/
if (i == 1) {
VSC_C_main->backend_retry++;
i = V1F_fetch_hdr(wrk, bo, bo->req);
}
if (bo->do_pass && bo->req != NULL)
vbf_release_req(bo); /* XXX : retry ?? */
AZ(bo->req);
if (i) {
AZ(bo->vbc);
make_it_503(bo);
} else {
AN(bo->vbc);
}
/*
* These two headers can be spread over multiple actual headers
* and we rely on their content outside of VCL, so collect them
* into one line here.
*/
http_CollectHdr(bo->beresp, H_Cache_Control);
http_CollectHdr(bo->beresp, H_Vary);
/*
* Figure out how the fetch is supposed to happen, before the
* headers are adultered by VCL
* NB: Also sets other wrk variables
*/
bo->htc.body_status = RFC2616_Body(bo, &wrk->stats);
if (i && bo->htc.body_status == BS_LENGTH)
bo->htc.body_status = BS_NONE;
bo->err_code = http_GetStatus(bo->beresp);
/*
* What does RFC2616 think about TTL ?
*/
EXP_Clr(&bo->exp);
RFC2616_Ttl(bo);
/* private objects have negative TTL */
if (bo->fetch_objcore->flags & OC_F_PRIVATE)
bo->exp.ttl = -1.;
AZ(bo->do_esi);
if (bo->ims_obj != NULL && bo->beresp->status == 304) {
bo->beresp->status = 200;
http_PrintfHeader(bo->beresp, "Content-Length: %jd",
(intmax_t)bo->ims_obj->len);
do_ims = 1;
} else
do_ims = 0;
VCL_backend_response_method(bo->vcl, wrk, NULL, bo, bo->beresp->ws);
if (bo->do_esi)
bo->do_stream = 0;
if (bo->do_pass)
bo->fetch_objcore->flags |= OC_F_PASS;
if (wrk->handling == VCL_RET_DELIVER)
return (do_ims ? F_STP_CONDFETCH : F_STP_FETCH);
if (wrk->handling == VCL_RET_RETRY) {
assert(bo->state == BOS_REQ_DONE);
bo->retries++;
if (bo->retries <= cache_param->max_retries) {
VDI_CloseFd(&bo->vbc);
return (F_STP_STARTFETCH);
}
// XXX: wrk->handling = VCL_RET_SYNTH;
}
INCOMPL();
}
static enum fetch_step
vbf_stp_startfetch(struct worker *wrk, struct busyobj *bo)
{
int i, do_ims;
double now;
char time_str[VTIM_FORMAT_SIZE];
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
AZ(bo->vbc);
assert(bo->doclose == SC_NULL);
AZ(bo->storage_hint);
if (bo->do_pass)
AN(bo->req);
else
AZ(bo->req);
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, SLT_BereqMethod);
HTTP_Copy(bo->bereq, bo->bereq0);
http_PrintfHeader(bo->bereq, "X-Varnish: %u", VXID(bo->vsl->wid));
VCL_backend_fetch_method(bo->vcl, wrk, NULL, bo, bo->bereq->ws);
bo->uncacheable = bo->do_pass;
if (wrk->handling == VCL_RET_ABANDON)
return (F_STP_FAIL);
assert (wrk->handling == VCL_RET_FETCH);
HTTP_Setup(bo->beresp, bo->ws, bo->vsl, SLT_BerespMethod);
assert(bo->state <= BOS_REQ_DONE);
i = V1F_fetch_hdr(wrk, bo, bo->req);
/*
* If we recycle a backend connection, there is a finite chance
* that the backend closed it before we get a request to it.
* Do a single retry in that case.
*/
if (i == 1) {
VSLb_ts_busyobj(bo, "Beresp", W_TIM_real(wrk));
VSC_C_main->backend_retry++;
i = V1F_fetch_hdr(wrk, bo, bo->req);
}
now = W_TIM_real(wrk);
VSLb_ts_busyobj(bo, "Beresp", now);
if (i) {
AZ(bo->vbc);
return (F_STP_ERROR);
}
AN(bo->vbc);
http_VSL_log(bo->beresp);
if (!http_GetHdr(bo->beresp, H_Date, NULL)) {
/*
* RFC 2616 14.18 Date: The Date general-header field
* represents the date and time at which the message was
* originated, having the same semantics as orig-date in
* RFC 822. ... A received message that does not have a
* Date header field MUST be assigned one by the recipient
* if the message will be cached by that recipient or
* gatewayed via a protocol which requires a Date.
*
* If we didn't get a Date header, we assign one here.
*/
VTIM_format(now, time_str);
http_PrintfHeader(bo->beresp, "Date: %s", time_str);
}
/*
* These two headers can be spread over multiple actual headers
* and we rely on their content outside of VCL, so collect them
* into one line here.
*/
http_CollectHdr(bo->beresp, H_Cache_Control);
http_CollectHdr(bo->beresp, H_Vary);
/*
* Figure out how the fetch is supposed to happen, before the
* headers are adultered by VCL
* NB: Also sets other wrk variables
*/
bo->htc.body_status = RFC2616_Body(bo, &wrk->stats);
if (bo->htc.body_status == BS_ERROR) {
AN (bo->vbc);
VDI_CloseFd(&bo->vbc, &bo->acct);
VSLb(bo->vsl, SLT_Error, "Body cannot be fetched");
return (F_STP_ERROR);
}
/*
* What does RFC2616 think about TTL ?
*/
EXP_Clr(&bo->fetch_objcore->exp);
RFC2616_Ttl(bo, now);
/* private objects have negative TTL */
if (bo->fetch_objcore->flags & OC_F_PRIVATE)
bo->fetch_objcore->exp.ttl = -1.;
AZ(bo->do_esi);
if (bo->ims_obj != NULL && bo->beresp->status == 304) {
http_Merge(bo->ims_obj->http, bo->beresp,
bo->ims_obj->changed_gzip);
assert(bo->beresp->status == 200);
do_ims = 1;
} else
do_ims = 0;
VFP_Setup(bo->vfc);
bo->vfc->bo = bo;
bo->vfc->http = bo->beresp;
bo->vfc->vsl = bo->vsl;
VCL_backend_response_method(bo->vcl, wrk, NULL, bo, bo->beresp->ws);
if (wrk->handling == VCL_RET_ABANDON)
return (F_STP_FAIL);
if (wrk->handling == VCL_RET_RETRY) {
AN (bo->vbc);
VDI_CloseFd(&bo->vbc, &bo->acct);
bo->doclose = SC_NULL;
bo->retries++;
if (bo->retries <= cache_param->max_retries)
return (F_STP_RETRY);
VSLb(bo->vsl, SLT_VCL_Error,
"Too many retries, delivering 503");
return (F_STP_ERROR);
}
assert(bo->state == BOS_REQ_DONE);
if (bo->do_esi)
bo->do_stream = 0;
if (bo->do_pass || bo->uncacheable)
bo->fetch_objcore->flags |= OC_F_PASS;
assert(wrk->handling == VCL_RET_DELIVER);
return (do_ims ? F_STP_CONDFETCH : F_STP_FETCH);
}
