int FetchHdr(struct sess *sp, int need_host_hdr) { struct vbc *vc; struct worker *wrk; struct http *hp; int retry = -1; int i; struct http_conn *htc; CHECK_OBJ_NOTNULL(sp, SESS_MAGIC); CHECK_OBJ_NOTNULL(sp->wrk, WORKER_MAGIC); wrk = sp->wrk; CHECK_OBJ_NOTNULL(wrk->busyobj, BUSYOBJ_MAGIC); htc = &wrk->busyobj->htc; AN(sp->req->director); AZ(sp->req->obj); if (sp->req->objcore != NULL) { /* pass has no objcore */ CHECK_OBJ_NOTNULL(sp->req->objcore, OBJCORE_MAGIC); AN(sp->req->objcore->flags & OC_F_BUSY); } hp = wrk->busyobj->bereq; sp->wrk->busyobj->vbc = VDI_GetFd(NULL, sp); if (sp->wrk->busyobj->vbc == NULL) { WSP(sp, SLT_FetchError, "no backend connection"); return (-1); } vc = sp->wrk->busyobj->vbc; if (vc->recycled) retry = 1; /* * 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 (need_host_hdr) VDI_AddHostHeader(sp->wrk, vc); (void)VTCP_blocking(vc->fd); /* XXX: we should timeout instead */ WRW_Reserve(wrk, &vc->fd); (void)http_Write(wrk, vc->vsl_id, hp, 0); /* XXX: stats ? */ /* Deal with any message-body the request might have */ i = FetchReqBody(sp); if (WRW_FlushRelease(wrk) || i > 0) { WSP(sp, SLT_FetchError, "backend write error: %d (%s)", errno, strerror(errno)); VDI_CloseFd(sp->wrk, &sp->wrk->busyobj->vbc); /* XXX: other cleanup ? */ return (retry); } /* Checkpoint the vsl.here */ WSL_Flush(wrk, 0); /* XXX is this the right place? */ VSC_C_main->backend_req++; /* Receive response */ HTC_Init(htc, wrk->ws, vc->fd, vc->vsl_id, cache_param->http_resp_size, cache_param->http_resp_hdr_len); VTCP_set_read_timeout(vc->fd, vc->first_byte_timeout); i = HTC_Rx(htc); if (i < 0) { WSP(sp, SLT_FetchError, "http first read error: %d %d (%s)", i, errno, strerror(errno)); VDI_CloseFd(sp->wrk, &sp->wrk->busyobj->vbc); /* XXX: other cleanup ? */ /* Retryable if we never received anything */ return (i == -1 ? retry : -1); } VTCP_set_read_timeout(vc->fd, vc->between_bytes_timeout); while (i == 0) { i = HTC_Rx(htc); if (i < 0) { WSP(sp, SLT_FetchError, "http first read error: %d %d (%s)", i, errno, strerror(errno)); VDI_CloseFd(sp->wrk, &sp->wrk->busyobj->vbc); /* XXX: other cleanup ? */ return (-1); } } hp = wrk->busyobj->beresp; if (http_DissectResponse(wrk, htc, hp)) { WSP(sp, SLT_FetchError, "http format error"); VDI_CloseFd(sp->wrk, &sp->wrk->busyobj->vbc); /* XXX: other cleanup ? */ return (-1); } return (0); }
void PipeSession(struct sess *sp) { struct vbc *vc; struct worker *w; struct pollfd fds[2]; int i; CHECK_OBJ_NOTNULL(sp, SESS_MAGIC); CHECK_OBJ_NOTNULL(sp->wrk, WORKER_MAGIC); w = sp->wrk; sp->vbc = VDI_GetFd(NULL, sp); if (sp->vbc == NULL) return; vc = sp->vbc; (void)VTCP_blocking(vc->fd); WRW_Reserve(w, &vc->fd); sp->wrk->acct_tmp.hdrbytes += http_Write(w, sp->vsl_id, sp->wrk->bereq, 0); if (sp->htc->pipeline.b != NULL) sp->wrk->acct_tmp.bodybytes += WRW_Write(w, sp->htc->pipeline.b, Tlen(sp->htc->pipeline)); i = WRW_FlushRelease(w); if (i) { SES_Close(sp, "pipe"); VDI_CloseFd(sp); return; } sp->t_resp = VTIM_real(); memset(fds, 0, sizeof fds); // XXX: not yet (void)VTCP_linger(vc->fd, 0); fds[0].fd = vc->fd; fds[0].events = POLLIN | POLLERR; // XXX: not yet (void)VTCP_linger(sp->fd, 0); fds[1].fd = sp->fd; fds[1].events = POLLIN | POLLERR; while (fds[0].fd > -1 || fds[1].fd > -1) { fds[0].revents = 0; fds[1].revents = 0; i = poll(fds, 2, params->pipe_timeout * 1000); if (i < 1) break; if (fds[0].revents && rdf(vc->fd, sp->fd)) { if (fds[1].fd == -1) break; (void)shutdown(vc->fd, SHUT_RD); (void)shutdown(sp->fd, SHUT_WR); fds[0].events = 0; fds[0].fd = -1; } if (fds[1].revents && rdf(sp->fd, vc->fd)) { if (fds[0].fd == -1) break; (void)shutdown(sp->fd, SHUT_RD); (void)shutdown(vc->fd, SHUT_WR); fds[1].events = 0; fds[1].fd = -1; } } SES_Close(sp, "pipe"); VDI_CloseFd(sp); }