static enum sess_close
vbe_dir_http1pipe(const struct director *d, struct req *req, struct busyobj *bo)
{
int i;
enum sess_close retval;
struct backend *bp;
struct v1p_acct v1a;
struct vbc *vbc;
CHECK_OBJ_NOTNULL(d, DIRECTOR_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
CAST_OBJ_NOTNULL(bp, d->priv, BACKEND_MAGIC);
memset(&v1a, 0, sizeof v1a);
/* This is hackish... */
v1a.req = req->acct.req_hdrbytes;
req->acct.req_hdrbytes = 0;
req->res_mode = RES_PIPE;
vbc = vbe_dir_getfd(req->wrk, bp, bo);
if (vbc == NULL) {
VSLb(bo->vsl, SLT_FetchError, "no backend connection");
retval = SC_TX_ERROR;
} else {
i = V1F_SendReq(req->wrk, bo, &v1a.bereq, 1);
VSLb_ts_req(req, "Pipe", W_TIM_real(req->wrk));
if (vbc->state == VBC_STATE_STOLEN)
VBT_Wait(req->wrk, vbc);
if (i == 0)
V1P_Process(req, vbc->fd, &v1a);
VSLb_ts_req(req, "PipeSess", W_TIM_real(req->wrk));
bo->htc->doclose = SC_TX_PIPE;
vbe_dir_finish(d, req->wrk, bo);
retval = SC_TX_PIPE;
}
V1P_Charge(req, &v1a, bp->vsc);
return (retval);
}
vbe_dir_gethdrs(const struct director *d, struct worker *wrk,
struct busyobj *bo)
{
int i, extrachance = 1;
struct backend *bp;
struct vbc *vbc;
CHECK_OBJ_NOTNULL(d, DIRECTOR_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
CAST_OBJ_NOTNULL(bp, d->priv, BACKEND_MAGIC);
/*
* Now that we know our backend, we can set a default Host:
* header if one is necessary. This cannot be done in the VCL
* because the backend may be chosen by a director.
*/
if (!http_GetHdr(bo->bereq, H_Host, NULL) && bp->hosthdr != NULL)
http_PrintfHeader(bo->bereq, "Host: %s", bp->hosthdr);
do {
vbc = vbe_dir_getfd(wrk, bp, bo);
if (vbc == NULL) {
VSLb(bo->vsl, SLT_FetchError, "no backend connection");
return (-1);
}
AN(bo->htc);
if (vbc->state != VBC_STATE_STOLEN)
extrachance = 0;
i = V1F_SendReq(wrk, bo, &bo->acct.bereq_hdrbytes, 0);
if (vbc->state != VBC_STATE_USED)
VBT_Wait(wrk, vbc);
assert(vbc->state == VBC_STATE_USED);
if (i == 0)
i = V1F_FetchRespHdr(bo);
if (i == 0) {
AN(bo->htc->priv);
return (0);
}
/*
* If we recycled a backend connection, there is a finite chance
* that the backend closed it before we got the bereq to it.
* In that case do a single automatic retry if req.body allows.
*/
vbe_dir_finish(d, wrk, bo);
AZ(bo->htc);
if (i < 0)
break;
if (bo->req != NULL &&
bo->req->req_body_status != REQ_BODY_NONE &&
bo->req->req_body_status != REQ_BODY_CACHED)
break;
VSC_C_main->backend_retry++;
} while (extrachance);
return (-1);
}