static enum req_fsm_nxt
cnt_synth(struct worker *wrk, struct req *req)
{
char date[40];
struct http *h;
double now;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
wrk->stats.s_synth++;
now = W_TIM_real(wrk);
VSLb_ts_req(req, "Process", now);
if (req->err_code < 100 || req->err_code > 999)
req->err_code = 501;
HTTP_Setup(req->resp, req->ws, req->vsl, SLT_RespMethod);
h = req->resp;
VTIM_format(now, date);
http_PrintfHeader(h, "Date: %s", date);
http_SetHeader(h, "Server: Varnish");
http_PrintfHeader(req->resp, "X-Varnish: %u", VXID(req->vsl->wid));
http_PutResponse(h, "HTTP/1.1", req->err_code, req->err_reason);
AZ(req->synth_body);
req->synth_body = VSB_new_auto();
AN(req->synth_body);
VCL_synth_method(req->vcl, wrk, req, NULL, req->http->ws);
http_Unset(h, H_Content_Length);
AZ(VSB_finish(req->synth_body));
if (wrk->handling == VCL_RET_RESTART) {
HTTP_Setup(h, req->ws, req->vsl, SLT_RespMethod);
VSB_delete(req->synth_body);
req->synth_body = NULL;
req->req_step = R_STP_RESTART;
return (REQ_FSM_MORE);
}
assert(wrk->handling == VCL_RET_DELIVER);
if (http_HdrIs(req->resp, H_Connection, "close"))
req->doclose = SC_RESP_CLOSE;
V1D_Deliver_Synth(req);
VSLb_ts_req(req, "Resp", W_TIM_real(wrk));
VSB_delete(req->synth_body);
req->synth_body = NULL;
req->err_code = 0;
req->err_reason = NULL;
return (REQ_FSM_DONE);
}
static int
cnt_error(struct sess *sp)
{
struct worker *w;
struct http *h;
char date[40];
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
w = sp->wrk;
if (sp->obj == NULL) {
HSH_Prealloc(sp);
sp->obj = HSH_NewObject(sp, 1);
sp->obj->xid = sp->xid;
sp->obj->entered = sp->t_req;
} else {
/* XXX: Null the headers ? */
}
CHECK_OBJ_NOTNULL(sp->obj, OBJECT_MAGIC);
h = sp->obj->http;
http_PutProtocol(w, sp->fd, h, "HTTP/1.1");
http_PutStatus(w, sp->fd, h, sp->err_code);
TIM_format(TIM_real(), date);
http_PrintfHeader(w, sp->fd, h, "Date: %s", date);
http_PrintfHeader(w, sp->fd, h, "Server: Varnish");
http_PrintfHeader(w, sp->fd, h, "Retry-After: %d", params->err_ttl);
if (sp->err_reason != NULL)
http_PutResponse(w, sp->fd, h, sp->err_reason);
else
http_PutResponse(w, sp->fd, h,
http_StatusMessage(sp->err_code));
VCL_error_method(sp);
if (sp->handling == VCL_RET_RESTART) {
HSH_Drop(sp);
sp->director = NULL;
sp->restarts++;
sp->step = STP_RECV;
return (0);
}
/* We always close when we take this path */
sp->doclose = "error";
sp->wantbody = 1;
assert(sp->handling == VCL_RET_DELIVER);
sp->err_code = 0;
sp->err_reason = NULL;
sp->wrk->bereq = NULL;
sp->step = STP_DELIVER;
return (0);
}
static enum fetch_step
vbf_stp_mkbereq(struct worker *wrk, struct busyobj *bo)
{
const char *q;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
CHECK_OBJ_NOTNULL(bo->req, REQ_MAGIC);
assert(bo->fetch_objcore->boc->state == BOS_INVALID);
AZ(bo->storage);
HTTP_Setup(bo->bereq0, bo->ws, bo->vsl, SLT_BereqMethod);
http_FilterReq(bo->bereq0, bo->req->http,
bo->do_pass ? HTTPH_R_PASS : HTTPH_R_FETCH);
if (!bo->do_pass) {
http_ForceField(bo->bereq0, HTTP_HDR_METHOD, "GET");
http_ForceField(bo->bereq0, HTTP_HDR_PROTO, "HTTP/1.1");
if (cache_param->http_gzip_support)
http_ForceHeader(bo->bereq0, H_Accept_Encoding, "gzip");
} else {
AZ(bo->stale_oc);
if (bo->bereq0->protover > 11)
http_ForceField(bo->bereq0, HTTP_HDR_PROTO, "HTTP/1.1");
}
http_CopyHome(bo->bereq0);
if (bo->stale_oc != NULL &&
ObjCheckFlag(bo->wrk, bo->stale_oc, OF_IMSCAND) &&
(bo->stale_oc->boc != NULL || ObjGetLen(wrk, bo->stale_oc) != 0)) {
AZ(bo->stale_oc->flags & OC_F_PASS);
q = HTTP_GetHdrPack(bo->wrk, bo->stale_oc, H_Last_Modified);
if (q != NULL)
http_PrintfHeader(bo->bereq0,
"If-Modified-Since: %s", q);
q = HTTP_GetHdrPack(bo->wrk, bo->stale_oc, H_ETag);
if (q != NULL)
http_PrintfHeader(bo->bereq0,
"If-None-Match: %s", q);
}
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, SLT_BereqMethod);
bo->ws_bo = WS_Snapshot(bo->ws);
HTTP_Copy(bo->bereq, bo->bereq0);
if (bo->req->req_body_status == REQ_BODY_NONE) {
bo->req = NULL;
ObjSetState(bo->wrk, bo->fetch_objcore, BOS_REQ_DONE);
}
return (F_STP_STARTFETCH);
}
static enum req_fsm_nxt
cnt_pipe(struct worker *wrk, struct req *req)
{
struct busyobj *bo;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
AN(req->vcl);
wrk->stats->s_pipe++;
bo = VBO_GetBusyObj(wrk, req);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
VSLb(bo->vsl, SLT_Begin, "bereq %u pipe", VXID(req->vsl->wid));
VSLb(req->vsl, SLT_Link, "bereq %u pipe", VXID(bo->vsl->wid));
THR_SetBusyobj(bo);
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, SLT_BereqMethod);
http_FilterReq(bo->bereq, req->http, 0); // XXX: 0 ?
http_PrintfHeader(bo->bereq, "X-Varnish: %u", VXID(req->vsl->wid));
http_SetHeader(bo->bereq, "Connection: close");
VCL_pipe_method(req->vcl, wrk, req, bo, NULL);
if (wrk->handling == VCL_RET_SYNTH)
INCOMPL();
assert(wrk->handling == VCL_RET_PIPE);
SES_Close(req->sp, VDI_Http1Pipe(req, bo));
http_Teardown(bo->bereq);
VBO_ReleaseBusyObj(wrk, &bo);
THR_SetBusyobj(NULL);
return (REQ_FSM_DONE);
}
static enum req_fsm_nxt
cnt_pipe(struct worker *wrk, struct req *req)
{
struct busyobj *bo;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->vcl, VCL_CONF_MAGIC);
req->acct_req.pipe++;
bo = VBO_GetBusyObj(wrk, req);
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, HTTP_Bereq);
http_FilterReq(bo->bereq, req->http, 0); // XXX: 0 ?
http_PrintfHeader(bo->bereq,
"X-Varnish: %u", req->vsl->wid & VSL_IDENTMASK);
VCL_pipe_method(req->vcl, wrk, req, bo, req->http->ws);
if (wrk->handling == VCL_RET_ERROR)
INCOMPL();
assert(wrk->handling == VCL_RET_PIPE);
PipeRequest(req, bo);
assert(WRW_IsReleased(wrk));
http_Teardown(bo->bereq);
VBO_DerefBusyObj(wrk, &bo);
return (REQ_FSM_DONE);
}
uint16_t
HTTP1_DissectRequest(struct http_conn *htc, struct http *hp)
{
uint16_t retval;
const char *p;
const char *b = NULL, *e;
CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
retval = http1_splitline(hp, htc,
HTTP1_Req, cache_param->http_req_hdr_len);
if (retval != 0)
return (retval);
hp->protover = http1_proto_ver(hp);
if (hp->protover == 0)
return (400);
if (http_CountHdr(hp, H_Host) > 1)
return (400);
if (http_CountHdr(hp, H_Content_Length) > 1)
return (400);
/* RFC2616, section 5.2, point 1 */
if (!strncasecmp(hp->hd[HTTP_HDR_URL].b, "http://", 7))
b = hp->hd[HTTP_HDR_URL].b + 7;
else if (FEATURE(FEATURE_HTTPS_SCHEME) &&
!strncasecmp(hp->hd[HTTP_HDR_URL].b, "https://", 8))
b = hp->hd[HTTP_HDR_URL].b + 8;
if (b) {
e = strchr(b, '/');
if (e) {
http_Unset(hp, H_Host);
http_PrintfHeader(hp, "Host: %.*s", (int)(e - b), b);
hp->hd[HTTP_HDR_URL].b = e;
}
}
htc->body_status = http1_body_status(hp, htc, 1);
if (htc->body_status == BS_ERROR)
return (400);
p = http_GetMethod(hp);
AN(p);
if (htc->body_status == BS_EOF) {
assert(hp->protover == 10);
/* RFC1945 8.3 p32 and D.1.1 p58 */
if (!strcasecmp(p, "post") || !strcasecmp(p, "put"))
return (400);
htc->body_status = BS_NONE;
}
/* HEAD with a body is a hard error */
if (htc->body_status != BS_NONE && !strcasecmp(p, "head"))
return (400);
return (retval);
}
void
VRT_synth_page(const struct vrt_ctx *ctx, unsigned flags, const char *str, ...)
{
va_list ap;
const char *p;
struct vsb *vsb;
(void)flags;
CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
CHECK_OBJ_NOTNULL(ctx->req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(ctx->req->obj, OBJECT_MAGIC);
vsb = SMS_Makesynth(ctx->req->obj);
AN(vsb);
va_start(ap, str);
p = str;
while (p != vrt_magic_string_end) {
if (p == NULL)
p = "(null)";
VSB_cat(vsb, p);
p = va_arg(ap, const char *);
}
va_end(ap);
SMS_Finish(ctx->req->obj);
http_Unset(ctx->req->obj->http, H_Content_Length);
http_PrintfHeader(ctx->req->obj->http,
"Content-Length: %zd", ctx->req->obj->len);
}
static enum fetch_step
vbf_stp_startfetch(struct worker *wrk, struct busyobj *bo)
{
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
AN(bo->director);
AZ(bo->vbc);
AZ(bo->should_close);
AZ(bo->storage_hint);
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, HTTP_Bereq);
HTTP_Copy(bo->bereq, bo->bereq0);
VCL_backend_fetch_method(bo->vcl, wrk, NULL, bo, bo->bereq->ws);
bo->uncacheable = bo->do_pass;
http_PrintfHeader(bo->bereq,
"X-Varnish: %u", bo->vsl->wid & VSL_IDENTMASK);
if (wrk->handling == VCL_RET_ABANDON) {
VBO_setstate(bo, BOS_FAILED);
return (F_STP_ABANDON);
}
assert (wrk->handling == VCL_RET_FETCH);
return (F_STP_FETCHHDR);
}
void
VRT_synth_page(const struct sess *sp, unsigned flags, const char *str, ...)
{
va_list ap;
const char *p;
struct vsb *vsb;
(void)flags;
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(sp->wrk->obj, OBJECT_MAGIC);
vsb = SMS_Makesynth(sp->wrk->obj);
AN(vsb);
VSB_cat(vsb, str);
va_start(ap, str);
p = va_arg(ap, const char *);
while (p != vrt_magic_string_end) {
if (p == NULL)
p = "(null)";
VSB_cat(vsb, p);
p = va_arg(ap, const char *);
}
va_end(ap);
SMS_Finish(sp->wrk->obj);
http_Unset(sp->wrk->obj->http, H_Content_Length);
http_PrintfHeader(sp->wrk, sp->vsl_id, sp->wrk->obj->http,
"Content-Length: %zd", sp->wrk->obj->len);
}
int
V1F_SendReq(struct worker *wrk, struct busyobj *bo, uint64_t *ctr,
int onlycached)
{
struct http *hp;
int j;
ssize_t i;
struct http_conn *htc;
int do_chunked = 0;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
htc = bo->htc;
hp = bo->bereq;
if (bo->req != NULL &&
bo->req->req_body_status == REQ_BODY_WITHOUT_LEN) {
http_PrintfHeader(hp, "Transfer-Encoding: chunked");
do_chunked = 1;
}
(void)VTCP_blocking(htc->fd); /* XXX: we should timeout instead */
V1L_Reserve(wrk, wrk->aws, &htc->fd, bo->vsl, bo->t_prev);
*ctr += HTTP1_Write(wrk, hp, HTTP1_Req);
/* Deal with any message-body the request might (still) have */
i = 0;
if (bo->req != NULL &&
(bo->req->req_body_status == REQ_BODY_CACHED || !onlycached)) {
if (do_chunked)
V1L_Chunked(wrk);
i = VRB_Iterate(bo->req, vbf_iter_req_body, bo);
if (bo->req->req_body_status == REQ_BODY_FAIL) {
assert(i < 0);
VSLb(bo->vsl, SLT_FetchError,
"req.body read error: %d (%s)",
errno, strerror(errno));
bo->req->doclose = SC_RX_BODY;
}
if (do_chunked)
V1L_EndChunk(wrk);
}
j = V1L_FlushRelease(wrk);
if (j != 0 || i < 0) {
VSLb(bo->vsl, SLT_FetchError, "backend write error: %d (%s)",
errno, strerror(errno));
VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
htc->doclose = SC_TX_ERROR;
return (-1);
}
VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
return (0);
}
vmod_rot52(VRT_CTX, VCL_HTTP hp)
{
CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
http_PrintfHeader(hp, "Encrypted: ROT52");
}
static enum fetch_step
vbf_stp_mkbereq(const struct worker *wrk, struct busyobj *bo)
{
const char *q;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
CHECK_OBJ_NOTNULL(bo->req, REQ_MAGIC);
assert(bo->state == BOS_INVALID);
AZ(bo->storage_hint);
HTTP_Setup(bo->bereq0, bo->ws, bo->vsl, SLT_BereqMethod);
http_FilterReq(bo->bereq0, bo->req->http,
bo->do_pass ? HTTPH_R_PASS : HTTPH_R_FETCH);
if (!bo->do_pass) {
http_ForceField(bo->bereq0, HTTP_HDR_METHOD, "GET");
http_ForceField(bo->bereq0, HTTP_HDR_PROTO, "HTTP/1.1");
if (cache_param->http_gzip_support)
http_ForceHeader(bo->bereq0, H_Accept_Encoding, "gzip");
AN(bo->req);
bo->req = NULL;
http_CopyHome(bo->bereq0);
} else
AZ(bo->stale_oc);
if (bo->stale_oc != NULL) {
q = HTTP_GetHdrPack(bo->wrk, bo->stale_oc, H_Last_Modified);
if (q != NULL)
http_PrintfHeader(bo->bereq0,
"If-Modified-Since: %s", q);
q = HTTP_GetHdrPack(bo->wrk, bo->stale_oc, H_ETag);
if (q != NULL)
http_PrintfHeader(bo->bereq0,
"If-None-Match: %s", q);
}
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, SLT_BereqMethod);
bo->ws_bo = WS_Snapshot(bo->ws);
HTTP_Copy(bo->bereq, bo->bereq0);
VBO_setstate(bo, BOS_REQ_DONE);
return (F_STP_STARTFETCH);
}
/*--------------------------------------------------------------------
* Create default Host: header for backend request
*/
void
VDI_AddHostHeader(struct http *hp, const struct vbc *vbc)
{
CHECK_OBJ_NOTNULL(vbc, VBC_MAGIC);
CHECK_OBJ_NOTNULL(vbc->vdis, VDI_SIMPLE_MAGIC);
http_PrintfHeader(hp,
"Host: %s", vbc->vdis->vrt->hosthdr);
}
static enum fetch_step
vbf_stp_mkbereq(const struct worker *wrk, struct busyobj *bo)
{
char *p;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
CHECK_OBJ_NOTNULL(bo->req, REQ_MAGIC);
AN(bo->director);
AZ(bo->vbc);
AZ(bo->should_close);
AZ(bo->storage_hint);
HTTP_Setup(bo->bereq0, bo->ws, bo->vsl, HTTP_Bereq);
http_FilterReq(bo->bereq0, bo->req->http,
bo->do_pass ? HTTPH_R_PASS : HTTPH_R_FETCH);
if (!bo->do_pass) {
// XXX: Forcing GET should happen in vcl_miss{} ?
http_ForceGet(bo->bereq0);
if (cache_param->http_gzip_support) {
/*
* We always ask the backend for gzip, even if the
* client doesn't grok it. We will uncompress for
* the minority of clients which don't.
*/
http_Unset(bo->bereq0, H_Accept_Encoding);
http_SetHeader(bo->bereq0, "Accept-Encoding: gzip");
}
}
if (bo->ims_obj != NULL) {
if (http_GetHdr(bo->ims_obj->http, H_Last_Modified, &p)) {
http_PrintfHeader(bo->bereq0,
"If-Modified-Since: %s", p);
} else if (http_GetHdr(bo->ims_obj->http, H_ETag, &p)) {
http_PrintfHeader(bo->bereq0,
"If-None-Match: %s", p);
} else {
WRONG("Shouldn't have bo->ims_obj");
}
}
return (F_STP_STARTFETCH);
}
uint16_t
HTTP1_DissectRequest(struct http_conn *htc, struct http *hp)
{
uint16_t retval;
const char *p;
const char *b, *e;
CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
retval = http1_splitline(hp, htc, HTTP1_Req);
if (retval != 0)
return (retval);
hp->protover = http1_proto_ver(hp);
if (hp->protover == 0)
return (400);
if (http_CountHdr(hp, H_Host) > 1)
return (400);
if (http_CountHdr(hp, H_Content_Length) > 1)
return (400);
/* RFC2616, section 5.2, point 1 */
if (!strncasecmp(hp->hd[HTTP_HDR_URL].b, "http://", 7)) {
b = e = hp->hd[HTTP_HDR_URL].b + 7;
while (*e != '/' && *e != '\0')
e++;
if (*e == '/') {
http_Unset(hp, H_Host);
http_PrintfHeader(hp, "Host: %.*s", (int)(e - b), b);
hp->hd[HTTP_HDR_URL].b = e;
}
}
htc->body_status = http1_body_status(hp, htc);
if (htc->body_status == BS_ERROR)
return (400);
p = http_GetMethod(hp);
AN(p);
if (htc->body_status == BS_EOF) {
assert(hp->protover == 10);
/* RFC1945 8.3 p32 and D.1.1 p58 */
if (!strcasecmp(p, "post") || !strcasecmp(p, "put"))
return (400);
htc->body_status = BS_NONE;
}
/* HEAD with a body is a hard error */
if (htc->body_status != BS_NONE && !strcasecmp(p, "head"))
return (400);
return (retval);
}
void
http_ForceHeader(struct http *to, const char *hdr, const char *val)
{
CHECK_OBJ_NOTNULL(to, HTTP_MAGIC);
if (http_HdrIs(to, hdr, val))
return;
http_Unset(to, hdr);
http_PrintfHeader(to, "%s %s", hdr + 1, val);
}
static enum fetch_step
vbf_stp_mkbereq(const struct worker *wrk, struct busyobj *bo)
{
char *p;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
CHECK_OBJ_NOTNULL(bo->req, REQ_MAGIC);
assert(bo->state == BOS_INVALID);
AZ(bo->vbc);
assert(bo->doclose == SC_NULL);
AZ(bo->storage_hint);
HTTP_Setup(bo->bereq0, bo->ws, bo->vsl, SLT_BereqMethod);
http_FilterReq(bo->bereq0, bo->req->http,
bo->do_pass ? HTTPH_R_PASS : HTTPH_R_FETCH);
if (!bo->do_pass) {
http_ForceField(bo->bereq0, HTTP_HDR_METHOD, "GET");
http_ForceField(bo->bereq0, HTTP_HDR_PROTO, "HTTP/1.1");
if (cache_param->http_gzip_support)
http_ForceHeader(bo->bereq0, H_Accept_Encoding, "gzip");
AN(bo->req);
bo->req = NULL;
http_CopyHome(bo->bereq0);
}
if (bo->ims_obj != NULL && bo->ims_obj->http->status == 200) {
if (http_GetHdr(bo->ims_obj->http, H_Last_Modified, &p)) {
http_PrintfHeader(bo->bereq0,
"If-Modified-Since: %s", p);
}
if (http_GetHdr(bo->ims_obj->http, H_ETag, &p)) {
http_PrintfHeader(bo->bereq0,
"If-None-Match: %s", p);
}
}
VBO_setstate(bo, BOS_REQ_DONE);
return (F_STP_STARTFETCH);
}
/*--------------------------------------------------------------------
* Create default Host: header for backend request
*/
void
VBE_AddHostHeader(const struct sess *sp)
{
CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(sp->wrk->bereq, HTTP_MAGIC);
CHECK_OBJ_NOTNULL(sp->vbe, VBE_CONN_MAGIC);
CHECK_OBJ_NOTNULL(sp->vbe->backend, BACKEND_MAGIC);
http_PrintfHeader(sp->wrk, sp->fd, sp->wrk->bereq,
"Host: %s", sp->vbe->backend->hosthdr);
}
void
RFC2616_Vary_AE(struct http *hp)
{
const char *vary;
if (http_GetHdrToken(hp, H_Vary, "Accept-Encoding", NULL, NULL))
return;
if (http_GetHdr(hp, H_Vary, &vary)) {
http_Unset(hp, H_Vary);
http_PrintfHeader(hp, "Vary: %s, Accept-Encoding", vary);
} else {
http_SetHeader(hp, "Vary: Accept-Encoding");
}
}
void
RFC2616_Weaken_Etag(struct http *hp)
{
const char *p;
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
if (!http_GetHdr(hp, H_ETag, &p))
return;
AN(p);
if (p[0] == 'W' && p[1] == '/')
return;
http_Unset(hp, H_ETag);
http_PrintfHeader(hp, "ETag: W/%s", p);
}
void
http_FilterReq(const struct req *req, unsigned how)
{
struct http *hp;
hp = req->busyobj->bereq;
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
http_linkh(hp, req->http, HTTP_HDR_METHOD);
http_linkh(hp, req->http, HTTP_HDR_URL);
if (how == HTTPH_R_FETCH)
http_SetH(hp, HTTP_HDR_PROTO, "HTTP/1.1");
else
http_linkh(hp, req->http, HTTP_HDR_PROTO);
http_filterfields(hp, req->http, how);
http_PrintfHeader(hp, "X-Varnish: %u", req->vsl->wid & VSL_IDENTMASK);
}
void
http_FilterReq(const struct sess *sp, unsigned how)
{
struct http *hp;
hp = sp->req->busyobj->bereq;
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
hp->logtag = HTTP_Tx;
http_linkh(hp, sp->req->http, HTTP_HDR_REQ);
http_linkh(hp, sp->req->http, HTTP_HDR_URL);
if (how == HTTPH_R_FETCH)
http_SetH(hp, HTTP_HDR_PROTO, "HTTP/1.1");
else
http_linkh(hp, sp->req->http, HTTP_HDR_PROTO);
http_filterfields(hp, sp->req->http, how);
http_PrintfHeader(hp, "X-Varnish: %u", sp->req->xid);
}
void
http_FilterHeader(const struct sess *sp, unsigned how)
{
struct http *hp;
hp = sp->wrk->bereq;
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
hp->logtag = HTTP_Tx;
http_copyh(hp, sp->http, HTTP_HDR_REQ);
http_copyh(hp, sp->http, HTTP_HDR_URL);
if (how == HTTPH_R_FETCH)
http_SetH(hp, HTTP_HDR_PROTO, "HTTP/1.1");
else
http_copyh(hp, sp->http, HTTP_HDR_PROTO);
http_FilterFields(sp->wrk, sp->fd, hp, sp->http, how);
http_PrintfHeader(sp->wrk, sp->fd, hp, "X-Varnish: %u", sp->xid);
}
uint16_t
HTTP1_DissectRequest(struct req *req)
{
struct http_conn *htc;
struct http *hp;
uint16_t retval;
char *b, *e;
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
htc = req->htc;
CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
hp = req->http;
CHECK_OBJ_NOTNULL(hp, HTTP_MAGIC);
retval = htc_splitline(hp, htc, 1);
if (retval != 0) {
VSLbt(req->vsl, SLT_HttpGarbage, htc->rxbuf);
return (retval);
}
htc_proto_ver(hp);
retval = htc_request_check_host_hdr(hp);
if (retval != 0) {
return (retval);
}
/* RFC2616, section 5.2, point 1 */
if (!strncasecmp(hp->hd[HTTP_HDR_URL].b, "http://", 7)) {
b = e = hp->hd[HTTP_HDR_URL].b + 7;
while (*e != '/' && *e != '\0')
e++;
if (*e == '/') {
http_Unset(hp, H_Host);
http_PrintfHeader(hp, "Host: %.*s", (int)(e - b), b);
hp->hd[HTTP_HDR_URL].b = e;
}
}
return (retval);
}
static enum fetch_step
vbf_stp_startfetch(struct worker *wrk, struct busyobj *bo)
{
int i;
double now;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
AZ(bo->storage);
bo->storage = bo->do_pass ? stv_transient : STV_next();
if (bo->retries > 0)
http_Unset(bo->bereq, "\012X-Varnish:");
http_PrintfHeader(bo->bereq, "X-Varnish: %u", VXID(bo->vsl->wid));
VCL_backend_fetch_method(bo->vcl, wrk, NULL, bo, NULL);
bo->uncacheable = bo->do_pass;
if (wrk->handling == VCL_RET_ABANDON || wrk->handling == VCL_RET_FAIL)
return (F_STP_FAIL);
assert (wrk->handling == VCL_RET_FETCH);
HTTP_Setup(bo->beresp, bo->ws, bo->vsl, SLT_BerespMethod);
assert(bo->fetch_objcore->boc->state <= BOS_REQ_DONE);
AZ(bo->htc);
VFP_Setup(bo->vfc, wrk);
bo->vfc->oc = bo->fetch_objcore;
bo->vfc->resp = bo->beresp;
bo->vfc->req = bo->bereq;
i = VDI_GetHdr(wrk, bo);
now = W_TIM_real(wrk);
VSLb_ts_busyobj(bo, "Beresp", now);
if (i) {
assert(bo->director_state == DIR_S_NULL);
return (F_STP_ERROR);
}
http_VSL_log(bo->beresp);
if (bo->htc->body_status == BS_ERROR) {
bo->htc->doclose = SC_RX_BODY;
VDI_Finish(bo->wrk, bo);
VSLb(bo->vsl, SLT_Error, "Body cannot be fetched");
assert(bo->director_state == DIR_S_NULL);
return (F_STP_ERROR);
}
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.
*/
http_TimeHeader(bo->beresp, "Date: ", now);
}
/*
* 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);
if (bo->fetch_objcore->flags & OC_F_PRIVATE) {
/* private objects have negative TTL */
bo->fetch_objcore->t_origin = now;
bo->fetch_objcore->ttl = -1.;
bo->fetch_objcore->grace = 0;
bo->fetch_objcore->keep = 0;
} else {
/* What does RFC2616 think about TTL ? */
RFC2616_Ttl(bo, now,
&bo->fetch_objcore->t_origin,
&bo->fetch_objcore->ttl,
&bo->fetch_objcore->grace,
&bo->fetch_objcore->keep
);
}
AZ(bo->do_esi);
AZ(bo->was_304);
if (http_IsStatus(bo->beresp, 304)) {
if (bo->stale_oc != NULL &&
ObjCheckFlag(bo->wrk, bo->stale_oc, OF_IMSCAND)) {
if (ObjCheckFlag(bo->wrk, bo->stale_oc, OF_CHGGZIP)) {
/*
* If we changed the gzip status of the object
* the stored Content_Encoding controls we
* must weaken any new ETag we get.
*/
http_Unset(bo->beresp, H_Content_Encoding);
RFC2616_Weaken_Etag(bo->beresp);
}
http_Unset(bo->beresp, H_Content_Length);
HTTP_Merge(bo->wrk, bo->stale_oc, bo->beresp);
assert(http_IsStatus(bo->beresp, 200));
bo->was_304 = 1;
} else if (!bo->do_pass) {
/*
* Backend sent unallowed 304
*/
VSLb(bo->vsl, SLT_Error,
"304 response but not conditional fetch");
bo->htc->doclose = SC_RX_BAD;
VDI_Finish(bo->wrk, bo);
return (F_STP_ERROR);
}
}
VCL_backend_response_method(bo->vcl, wrk, NULL, bo, NULL);
if (wrk->handling == VCL_RET_ABANDON || wrk->handling == VCL_RET_FAIL) {
bo->htc->doclose = SC_RESP_CLOSE;
VDI_Finish(bo->wrk, bo);
return (F_STP_FAIL);
}
if (wrk->handling == VCL_RET_RETRY) {
if (bo->htc->body_status != BS_NONE)
bo->htc->doclose = SC_RESP_CLOSE;
if (bo->director_state != DIR_S_NULL)
VDI_Finish(bo->wrk, bo);
if (bo->retries++ < cache_param->max_retries)
return (F_STP_RETRY);
VSLb(bo->vsl, SLT_VCL_Error,
"Too many retries, delivering 503");
assert(bo->director_state == DIR_S_NULL);
return (F_STP_ERROR);
}
assert(bo->fetch_objcore->boc->state <= BOS_REQ_DONE);
if (bo->fetch_objcore->boc->state != BOS_REQ_DONE) {
bo->req = NULL;
ObjSetState(wrk, bo->fetch_objcore, BOS_REQ_DONE);
}
if (bo->do_esi)
bo->do_stream = 0;
if (wrk->handling == VCL_RET_PASS) {
bo->fetch_objcore->flags |= OC_F_HFP;
bo->uncacheable = 1;
wrk->handling = VCL_RET_DELIVER;
}
if (bo->do_pass || bo->uncacheable)
bo->fetch_objcore->flags |= OC_F_PASS;
assert(wrk->handling == VCL_RET_DELIVER);
return (bo->was_304 ? F_STP_CONDFETCH : F_STP_FETCH);
}
static enum req_fsm_nxt
cnt_recv(struct worker *wrk, struct req *req)
{
unsigned recv_handling;
struct SHA256Context sha256ctx;
const char *xff;
const char *ci, *cp;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
AN(req->vcl);
AZ(req->objcore);
AZ(req->err_code);
AZ(isnan(req->t_first));
AZ(isnan(req->t_prev));
AZ(isnan(req->t_req));
ci = SES_Get_String_Attr(req->sp, SA_CLIENT_IP);
cp = SES_Get_String_Attr(req->sp, SA_CLIENT_PORT);
VSLb(req->vsl, SLT_ReqStart, "%s %s", ci, cp);
http_VSL_log(req->http);
if (req->restarts == 0) {
/*
* This really should be done earlier, but we want to capture
* it in the VSL log.
*/
http_CollectHdr(req->http, H_X_Forwarded_For);
if (http_GetHdr(req->http, H_X_Forwarded_For, &xff)) {
http_Unset(req->http, H_X_Forwarded_For);
http_PrintfHeader(req->http, "X-Forwarded-For: %s, %s",
xff, ci);
} else {
http_PrintfHeader(req->http, "X-Forwarded-For: %s", ci);
}
}
/* By default we use the first backend */
AZ(req->director_hint);
req->director_hint = VCL_DefaultDirector(req->vcl);
AN(req->director_hint);
req->d_ttl = -1;
req->disable_esi = 0;
req->hash_always_miss = 0;
req->hash_ignore_busy = 0;
req->client_identity = NULL;
http_CollectHdr(req->http, H_Cache_Control);
VFP_Setup(req->htc->vfc);
req->htc->vfc->http = req->http;
req->htc->vfc->wrk = wrk;
if (req->transport->req_body != NULL) {
req->transport->req_body(req);
if (req->req_body_status == REQ_BODY_FAIL) {
req->doclose = SC_OVERLOAD;
return (REQ_FSM_DONE);
}
}
VCL_recv_method(req->vcl, wrk, req, NULL, NULL);
/* Attempts to cache req.body may fail */
if (req->req_body_status == REQ_BODY_FAIL) {
req->doclose = SC_RX_BODY;
return (REQ_FSM_DONE);
}
recv_handling = wrk->handling;
/* We wash the A-E header here for the sake of VRY */
if (cache_param->http_gzip_support &&
(recv_handling != VCL_RET_PIPE) &&
(recv_handling != VCL_RET_PASS)) {
if (RFC2616_Req_Gzip(req->http)) {
http_ForceHeader(req->http, H_Accept_Encoding, "gzip");
} else {
http_Unset(req->http, H_Accept_Encoding);
}
}
SHA256_Init(&sha256ctx);
VCL_hash_method(req->vcl, wrk, req, NULL, &sha256ctx);
assert(wrk->handling == VCL_RET_LOOKUP);
SHA256_Final(req->digest, &sha256ctx);
switch(recv_handling) {
case VCL_RET_PURGE:
req->req_step = R_STP_PURGE;
return (REQ_FSM_MORE);
case VCL_RET_HASH:
req->req_step = R_STP_LOOKUP;
return (REQ_FSM_MORE);
case VCL_RET_PIPE:
if (req->esi_level == 0) {
req->req_step = R_STP_PIPE;
return (REQ_FSM_MORE);
}
VSLb(req->vsl, SLT_VCL_Error,
"vcl_recv{} returns pipe for ESI included object."
" Doing pass.");
req->req_step = R_STP_PASS;
return (REQ_FSM_DONE);
case VCL_RET_PASS:
req->req_step = R_STP_PASS;
return (REQ_FSM_MORE);
case VCL_RET_SYNTH:
req->req_step = R_STP_SYNTH;
return (REQ_FSM_MORE);
default:
WRONG("Illegal return from vcl_recv{}");
}
}
static enum fetch_step
vbf_stp_startfetch(struct worker *wrk, struct busyobj *bo)
{
int i;
double now;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
AZ(bo->storage_hint);
if (bo->do_pass)
AN(bo->req);
else
AZ(bo->req);
if (bo->retries > 0)
http_Unset(bo->bereq, "\012X-Varnish:");
http_PrintfHeader(bo->bereq, "X-Varnish: %u", VXID(bo->vsl->wid));
VCL_backend_fetch_method(bo->vcl, wrk, NULL, bo, NULL);
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);
AZ(bo->htc);
i = VDI_GetHdr(wrk, bo);
now = W_TIM_real(wrk);
VSLb_ts_busyobj(bo, "Beresp", now);
if (i) {
assert(bo->director_state == DIR_S_NULL);
return (F_STP_ERROR);
}
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.
*/
http_TimeHeader(bo->beresp, "Date: ", now);
}
/*
* 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
*/
if (!strcasecmp(http_GetMethod(bo->bereq), "head")) {
/*
* A HEAD request can never have a body in the reply,
* no matter what the headers might say.
* [RFC2516 4.3 p33]
*/
wrk->stats->fetch_head++;
bo->htc->body_status = BS_NONE;
} else if (http_GetStatus(bo->beresp) <= 199) {
/*
* 1xx responses never have a body.
* [RFC2616 4.3 p33]
* ... but we should never see them.
*/
wrk->stats->fetch_1xx++;
bo->htc->body_status = BS_ERROR;
} else if (http_IsStatus(bo->beresp, 204)) {
/*
* 204 is "No Content", obviously don't expect a body.
* [RFC7230 3.3.1 p28 and 3.3.2 p30]
*/
wrk->stats->fetch_204++;
if (http_GetHdr(bo->beresp, H_Content_Length, NULL) ||
http_GetHdr(bo->beresp, H_Transfer_Encoding, NULL))
bo->htc->body_status = BS_ERROR;
else
bo->htc->body_status = BS_NONE;
} else if (http_IsStatus(bo->beresp, 304)) {
/*
* 304 is "Not Modified" it has no body.
* [RFC2616 10.3.5 p63]
*/
wrk->stats->fetch_304++;
bo->htc->body_status = BS_NONE;
} else if (bo->htc->body_status == BS_CHUNKED) {
wrk->stats->fetch_chunked++;
} else if (bo->htc->body_status == BS_LENGTH) {
assert(bo->htc->content_length > 0);
wrk->stats->fetch_length++;
} else if (bo->htc->body_status == BS_EOF) {
wrk->stats->fetch_eof++;
} else if (bo->htc->body_status == BS_ERROR) {
wrk->stats->fetch_bad++;
} else if (bo->htc->body_status == BS_NONE) {
wrk->stats->fetch_none++;
} else {
WRONG("wrong bodystatus");
}
if (bo->htc->body_status == BS_ERROR) {
bo->htc->doclose = SC_RX_BODY;
VDI_Finish(bo->wrk, bo);
VSLb(bo->vsl, SLT_Error, "Body cannot be fetched");
assert(bo->director_state == DIR_S_NULL);
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);
AZ(bo->was_304);
if (http_IsStatus(bo->beresp, 304)) {
if (bo->stale_oc != NULL &&
ObjCheckFlag(bo->wrk, bo->stale_oc, OF_IMSCAND)) {
if (ObjCheckFlag(bo->wrk, bo->stale_oc, OF_CHGGZIP)) {
/*
* If we changed the gzip status of the object
* the stored Content_Encoding controls we
* must weaken any new ETag we get.
*/
http_Unset(bo->beresp, H_Content_Encoding);
RFC2616_Weaken_Etag(bo->beresp);
}
http_Unset(bo->beresp, H_Content_Length);
HTTP_Merge(bo->wrk, bo->stale_oc, bo->beresp);
assert(http_IsStatus(bo->beresp, 200));
bo->was_304 = 1;
} else if (!bo->do_pass) {
/*
* Backend sent unallowed 304
*/
VSLb(bo->vsl, SLT_Error,
"304 response but not conditional fetch");
bo->htc->doclose = SC_RX_BAD;
VDI_Finish(bo->wrk, bo);
return (F_STP_FAIL);
}
}
bo->vfc->bo = bo;
bo->vfc->oc = bo->fetch_objcore;
bo->vfc->wrk = bo->wrk;
bo->vfc->http = bo->beresp;
bo->vfc->esi_req = bo->bereq;
VCL_backend_response_method(bo->vcl, wrk, NULL, bo, NULL);
if (wrk->handling == VCL_RET_ABANDON) {
bo->htc->doclose = SC_RESP_CLOSE;
VDI_Finish(bo->wrk, bo);
return (F_STP_FAIL);
}
if (wrk->handling == VCL_RET_RETRY) {
if (bo->htc->body_status != BS_NONE)
bo->htc->doclose = SC_RESP_CLOSE;
if (bo->director_state != DIR_S_NULL)
VDI_Finish(bo->wrk, bo);
if (bo->retries++ < cache_param->max_retries)
return (F_STP_RETRY);
VSLb(bo->vsl, SLT_VCL_Error,
"Too many retries, delivering 503");
assert(bo->director_state == DIR_S_NULL);
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 (bo->was_304 ? F_STP_CONDFETCH : F_STP_FETCH);
}
static enum req_fsm_nxt
cnt_deliver(struct worker *wrk, struct req *req)
{
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->objcore, OBJCORE_MAGIC);
CHECK_OBJ_NOTNULL(req->objcore->objhead, OBJHEAD_MAGIC);
AN(req->vcl);
assert(req->objcore->refcnt > 0);
ObjTouch(req->wrk, req->objcore, req->t_prev);
HTTP_Setup(req->resp, req->ws, req->vsl, SLT_RespMethod);
if (HTTP_Decode(req->resp,
ObjGetAttr(req->wrk, req->objcore, OA_HEADERS, NULL))) {
req->err_code = 500;
req->req_step = R_STP_SYNTH;
return (REQ_FSM_MORE);
}
http_ForceField(req->resp, HTTP_HDR_PROTO, "HTTP/1.1");
if (req->is_hit)
http_PrintfHeader(req->resp,
"X-Varnish: %u %u", VXID(req->vsl->wid),
ObjGetXID(wrk, req->objcore));
else
http_PrintfHeader(req->resp,
"X-Varnish: %u", VXID(req->vsl->wid));
/*
* We base Age calculation upon the last timestamp taken during
* client request processing. This gives some inaccuracy, but
* since Age is only full second resolution that shouldn't
* matter. (Last request timestamp could be a Start timestamp
* taken before the object entered into cache leading to negative
* age. Truncate to zero in that case).
*/
http_PrintfHeader(req->resp, "Age: %.0f",
fmax(0., req->t_prev - req->objcore->t_origin));
http_SetHeader(req->resp, "Via: 1.1 varnish-v4");
if (cache_param->http_gzip_support &&
ObjCheckFlag(req->wrk, req->objcore, OF_GZIPED) &&
!RFC2616_Req_Gzip(req->http))
RFC2616_Weaken_Etag(req->resp);
VCL_deliver_method(req->vcl, wrk, req, NULL, NULL);
VSLb_ts_req(req, "Process", W_TIM_real(wrk));
/* Stop the insanity before it turns "Hotel California" on us */
if (req->restarts >= cache_param->max_restarts)
wrk->handling = VCL_RET_DELIVER;
if (wrk->handling != VCL_RET_DELIVER) {
(void)HSH_DerefObjCore(wrk, &req->objcore);
http_Teardown(req->resp);
switch (wrk->handling) {
case VCL_RET_RESTART:
req->req_step = R_STP_RESTART;
break;
case VCL_RET_SYNTH:
req->req_step = R_STP_SYNTH;
break;
default:
WRONG("Illegal return from vcl_deliver{}");
}
return (REQ_FSM_MORE);
}
assert(wrk->handling == VCL_RET_DELIVER);
if (!(req->objcore->flags & OC_F_PASS)
&& req->esi_level == 0
&& http_IsStatus(req->resp, 200)
&& req->http->conds && RFC2616_Do_Cond(req))
http_PutResponse(req->resp, "HTTP/1.1", 304, NULL);
req->req_step = R_STP_TRANSMIT;
return (REQ_FSM_MORE);
}
static enum req_fsm_nxt
cnt_transmit(struct worker *wrk, struct req *req)
{
struct boc *boc;
const char *r;
uint16_t status;
int sendbody;
intmax_t clval;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->transport, TRANSPORT_MAGIC);
/* Grab a ref to the bo if there is one */
boc = HSH_RefBoc(req->objcore);
clval = http_GetContentLength(req->resp);
if (boc != NULL)
req->resp_len = clval;
else
req->resp_len = ObjGetLen(req->wrk, req->objcore);
req->res_mode = 0;
/* RFC 7230, 3.3.3 */
status = http_GetStatus(req->resp);
if (!strcmp(req->http0->hd[HTTP_HDR_METHOD].b, "HEAD")) {
if (req->objcore->flags & OC_F_PASS)
sendbody = -1;
else
sendbody = 0;
} else if (status < 200 || status == 204 || status == 304) {
req->resp_len = -1;
sendbody = 0;
} else
sendbody = 1;
if (sendbody >= 0) {
if (!req->disable_esi && req->resp_len != 0 &&
ObjHasAttr(wrk, req->objcore, OA_ESIDATA))
VDP_push(req, VDP_ESI, NULL, 0, "ESI");
if (cache_param->http_gzip_support &&
ObjCheckFlag(req->wrk, req->objcore, OF_GZIPED) &&
!RFC2616_Req_Gzip(req->http))
VDP_push(req, VDP_gunzip, NULL, 1, "GUZ");
if (cache_param->http_range_support &&
http_IsStatus(req->resp, 200)) {
http_SetHeader(req->resp, "Accept-Ranges: bytes");
if (sendbody && http_GetHdr(req->http, H_Range, &r))
VRG_dorange(req, r);
}
}
if (sendbody < 0) {
/* Don't touch pass+HEAD C-L */
sendbody = 0;
} else if (clval >= 0 && clval == req->resp_len) {
/* Reuse C-L header */
} else {
http_Unset(req->resp, H_Content_Length);
if (req->resp_len >= 0 && sendbody)
http_PrintfHeader(req->resp,
"Content-Length: %jd", req->resp_len);
}
req->transport->deliver(req, boc, sendbody);
VSLb_ts_req(req, "Resp", W_TIM_real(wrk));
if (req->objcore->flags & (OC_F_PRIVATE | OC_F_PASS)) {
if (boc != NULL) {
HSH_Abandon(req->objcore);
ObjWaitState(req->objcore, BOS_FINISHED);
}
ObjSlim(wrk, req->objcore);
}
if (boc != NULL)
HSH_DerefBoc(wrk, req->objcore);
(void)HSH_DerefObjCore(wrk, &req->objcore);
http_Teardown(req->resp);
return (REQ_FSM_DONE);
}
static enum req_fsm_nxt
cnt_synth(struct worker *wrk, struct req *req)
{
struct http *h;
double now;
struct vsb *synth_body;
ssize_t sz, szl;
uint8_t *ptr;
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
wrk->stats->s_synth++;
now = W_TIM_real(wrk);
VSLb_ts_req(req, "Process", now);
if (req->err_code < 100 || req->err_code > 999)
req->err_code = 501;
HTTP_Setup(req->resp, req->ws, req->vsl, SLT_RespMethod);
h = req->resp;
http_TimeHeader(h, "Date: ", now);
http_SetHeader(h, "Server: Varnish");
http_PrintfHeader(req->resp, "X-Varnish: %u", VXID(req->vsl->wid));
http_PutResponse(h, "HTTP/1.1", req->err_code, req->err_reason);
synth_body = VSB_new_auto();
AN(synth_body);
VCL_synth_method(req->vcl, wrk, req, NULL, synth_body);
AZ(VSB_finish(synth_body));
http_Unset(h, H_Content_Length);
http_PrintfHeader(req->resp, "Content-Length: %zd",
VSB_len(synth_body));
/* Discard any lingering request body before delivery */
(void)VRB_Ignore(req);
if (wrk->handling == VCL_RET_RESTART) {
HTTP_Setup(h, req->ws, req->vsl, SLT_RespMethod);
VSB_destroy(&synth_body);
req->req_step = R_STP_RESTART;
return (REQ_FSM_MORE);
}
assert(wrk->handling == VCL_RET_DELIVER);
req->objcore = HSH_Private(wrk);
CHECK_OBJ_NOTNULL(req->objcore, OBJCORE_MAGIC);
szl = -1;
if (STV_NewObject(wrk, req->objcore, TRANSIENT_STORAGE, 1024)) {
szl = VSB_len(synth_body);
assert(szl >= 0);
sz = szl;
if (sz > 0 &&
ObjGetSpace(wrk, req->objcore, &sz, &ptr) && sz >= szl) {
memcpy(ptr, VSB_data(synth_body), szl);
ObjExtend(wrk, req->objcore, szl);
} else if (sz > 0) {
szl = -1;
}
}
if (szl >= 0)
AZ(ObjSetU64(wrk, req->objcore, OA_LEN, szl));
HSH_DerefBoc(wrk, req->objcore);
VSB_destroy(&synth_body);
if (szl < 0) {
VSLb(req->vsl, SLT_Error, "Could not get storage");
req->doclose = SC_OVERLOAD;
VSLb_ts_req(req, "Resp", W_TIM_real(wrk));
(void)HSH_DerefObjCore(wrk, &req->objcore);
http_Teardown(req->resp);
return (REQ_FSM_DONE);
}
req->req_step = R_STP_TRANSMIT;
return (REQ_FSM_MORE);
}
