already_AddRefed<nsIInputStream>
DeserializeInputStream(const InputStreamParams& aParams,
const nsTArray<FileDescriptor>& aFileDescriptors)
{
nsCOMPtr<nsIInputStream> stream;
nsCOMPtr<nsIIPCSerializableInputStream> serializable;
switch (aParams.type()) {
case InputStreamParams::TStringInputStreamParams:
serializable = do_CreateInstance(kStringInputStreamCID);
break;
case InputStreamParams::TFileInputStreamParams:
serializable = do_CreateInstance(kFileInputStreamCID);
break;
case InputStreamParams::TPartialFileInputStreamParams:
serializable = do_CreateInstance(kPartialFileInputStreamCID);
break;
case InputStreamParams::TBufferedInputStreamParams:
serializable = do_CreateInstance(kBufferedInputStreamCID);
break;
case InputStreamParams::TMIMEInputStreamParams:
serializable = do_CreateInstance(kMIMEInputStreamCID);
break;
case InputStreamParams::TMultiplexInputStreamParams:
serializable = do_CreateInstance(kMultiplexInputStreamCID);
break;
// When the input stream already exists in this process, all we need to do
// is retrieve the original instead of sending any data over the wire.
case InputStreamParams::TRemoteInputStreamParams: {
if (NS_WARN_IF(XRE_GetProcessType() != GoannaProcessType_Default)) {
return nullptr;
}
const nsID& id = aParams.get_RemoteInputStreamParams().id();
nsRefPtr<FileImpl> blobImpl = BlobParent::GetBlobImplForID(id);
MOZ_ASSERT(blobImpl, "Invalid blob contents");
// If fetching the internal stream fails, we ignore it and return a
// null stream.
nsCOMPtr<nsIInputStream> stream;
nsresult rv = blobImpl->GetInternalStream(getter_AddRefs(stream));
if (NS_FAILED(rv) || !stream) {
NS_WARNING("Couldn't obtain a valid stream from the blob");
}
return stream.forget();
}
case InputStreamParams::TSameProcessInputStreamParams: {
MOZ_ASSERT(aFileDescriptors.IsEmpty());
const SameProcessInputStreamParams& params =
aParams.get_SameProcessInputStreamParams();
stream = dont_AddRef(
reinterpret_cast<nsIInputStream*>(params.addRefedInputStream()));
MOZ_ASSERT(stream);
return stream.forget();
}
default:
MOZ_ASSERT(false, "Unknown params!");
return nullptr;
}
MOZ_ASSERT(serializable);
if (!serializable->Deserialize(aParams, aFileDescriptors)) {
MOZ_ASSERT(false, "Deserialize failed!");
return nullptr;
}
stream = do_QueryInterface(serializable);
MOZ_ASSERT(stream);
return stream.forget();
}
already_AddRefed<nsIInputStream>
DeserializeInputStream(const InputStreamParams& aParams,
const nsTArray<FileDescriptor>& aFileDescriptors)
{
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIIPCSerializableInputStream> serializable;
switch (aParams.type()) {
case InputStreamParams::TStringInputStreamParams:
serializable = do_CreateInstance(kStringInputStreamCID);
break;
case InputStreamParams::TFileInputStreamParams:
serializable = do_CreateInstance(kFileInputStreamCID);
break;
case InputStreamParams::TPartialFileInputStreamParams:
serializable = do_CreateInstance(kPartialFileInputStreamCID);
break;
case InputStreamParams::TBufferedInputStreamParams:
serializable = do_CreateInstance(kBufferedInputStreamCID);
break;
case InputStreamParams::TMIMEInputStreamParams:
serializable = do_CreateInstance(kMIMEInputStreamCID);
break;
case InputStreamParams::TMultiplexInputStreamParams:
serializable = do_CreateInstance(kMultiplexInputStreamCID);
break;
// When the input stream already exists in this process, all we need to do
// is retrieve the original instead of sending any data over the wire.
case InputStreamParams::TRemoteInputStreamParams: {
nsCOMPtr<nsIDOMBlob> domBlob;
const RemoteInputStreamParams& params =
aParams.get_RemoteInputStreamParams();
domBlob = params.remoteBlobParent() ?
static_cast<BlobParent*>(params.remoteBlobParent())->GetBlob() :
static_cast<BlobChild*>(params.remoteBlobChild())->GetBlob();
MOZ_ASSERT(domBlob, "Invalid blob contents");
// If fetching the internal stream fails, we ignore it and return a
// null stream.
nsCOMPtr<nsIInputStream> stream;
nsresult rv = domBlob->GetInternalStream(getter_AddRefs(stream));
if (NS_FAILED(rv) || !stream) {
NS_WARNING("Couldn't obtain a valid stream from the blob");
}
return stream.forget();
}
default:
MOZ_ASSERT(false, "Unknown params!");
return nullptr;
}
MOZ_ASSERT(serializable);
if (!serializable->Deserialize(aParams, aFileDescriptors)) {
MOZ_ASSERT(false, "Deserialize failed!");
return nullptr;
}
nsCOMPtr<nsIInputStream> stream = do_QueryInterface(serializable);
MOZ_ASSERT(stream);
return stream.forget();
}
