void RequestHandlerAdaptor::onError(const HTTPException& error) noexcept {
if (err_ != kErrorNone) {
// we have already handled an error and upstream would have been deleted
return;
}
if (error.getProxygenError() == kErrorTimeout) {
setError(kErrorTimeout);
if (responseStarted_) {
sendAbort();
} else {
ResponseBuilder(this)
.status(408, "Request Timeout")
.closeConnection()
.sendWithEOM();
}
} else if (error.getDirection() == HTTPException::Direction::INGRESS) {
setError(kErrorRead);
if (responseStarted_) {
sendAbort();
} else {
ResponseBuilder(this)
.status(400, "Bad Request")
.closeConnection()
.sendWithEOM();
}
} else {
setError(kErrorWrite);
}
// Wait for detachTransaction to clean up
}
void HTTPTransaction::onError(const HTTPException& error) {
DestructorGuard g(this);
const bool wasAborted = aborted_; // see comment below
const bool wasEgressComplete = isEgressComplete();
const bool wasIngressComplete = isIngressComplete();
bool notify = (handler_);
HTTPException::Direction direction = error.getDirection();
if (direction == HTTPException::Direction::INGRESS &&
isIngressEOMSeen() && isExpectingWindowUpdate()) {
// we got an ingress error, we've seen the entire message, but we're
// expecting more (window updates). These aren't coming, convert to
// INGRESS_AND_EGRESS
VLOG(4) << *this << " Converting ingress error to ingress+egress due to"
" flow control, and aborting";
direction = HTTPException::Direction::INGRESS_AND_EGRESS;
sendAbort(ErrorCode::FLOW_CONTROL_ERROR);
}
if (error.getProxygenError() == kErrorStreamAbort) {
DCHECK(error.getDirection() ==
HTTPException::Direction::INGRESS_AND_EGRESS);
aborted_ = true;
} else if (error.hasCodecStatusCode()) {
DCHECK(error.getDirection() ==
HTTPException::Direction::INGRESS_AND_EGRESS);
sendAbort(error.getCodecStatusCode());
}
switch (direction) {
case HTTPException::Direction::INGRESS_AND_EGRESS:
markEgressComplete();
markIngressComplete();
if (wasEgressComplete && wasIngressComplete &&
// We mark egress complete before we get acknowledgement of the
// write segment finishing successfully.
// TODO: instead of using DestructorGuard hacks to keep txn around,
// use an explicit callback function and set egress complete after
// last byte flushes (or egress error occurs), see #3912823
(error.getProxygenError() != kErrorWriteTimeout || wasAborted)) {
notify = false;
}
break;
case HTTPException::Direction::EGRESS:
markEgressComplete();
if (!wasEgressComplete && isIngressEOMSeen() && ingressErrorSeen_) {
// we've already seen an ingress error but we ignored it, hoping the
// handler would resume and read our queued EOM. Now both sides are
// dead and we need to kill this transaction.
markIngressComplete();
}
if (wasEgressComplete) {
notify = false;
}
break;
case HTTPException::Direction::INGRESS:
if (isIngressEOMSeen()) {
// Not an error, for now
ingressErrorSeen_ = true;
return;
}
markIngressComplete();
if (wasIngressComplete) {
notify = false;
}
break;
}
if (notify && handler_) {
// mark egress complete may result in handler detaching
handler_->onError(error);
}
}