PassRefPtr<FormData> FormData::resolveBlobReferences()
{
// First check if any blobs needs to be resolved, or we can take the fast path.
bool hasBlob = false;
Vector<FormDataElement>::const_iterator it = elements().begin();
const Vector<FormDataElement>::const_iterator itend = elements().end();
for (; it != itend; ++it) {
if (it->m_type == FormDataElement::Type::EncodedBlob) {
hasBlob = true;
break;
}
}
if (!hasBlob)
return this;
// Create a copy to append the result into.
RefPtr<FormData> newFormData = FormData::create();
newFormData->setAlwaysStream(alwaysStream());
newFormData->setIdentifier(identifier());
it = elements().begin();
for (; it != itend; ++it) {
const FormDataElement& element = *it;
if (element.m_type == FormDataElement::Type::Data)
newFormData->appendData(element.m_data.data(), element.m_data.size());
else if (element.m_type == FormDataElement::Type::EncodedFile)
newFormData->appendFileRange(element.m_filename, element.m_fileStart, element.m_fileLength, element.m_expectedFileModificationTime, element.m_shouldGenerateFile);
else if (element.m_type == FormDataElement::Type::EncodedBlob)
appendBlobResolved(newFormData.get(), element.m_url);
else
ASSERT_NOT_REACHED();
}
return newFormData.release();
}
static void appendBlobResolved(FormData* formData, const URL& url)
{
if (!blobRegistry().isBlobRegistryImpl()) {
LOG_ERROR("Tried to resolve a blob without a usable registry");
return;
}
BlobStorageData* blobData = static_cast<BlobRegistryImpl&>(blobRegistry()).getBlobDataFromURL(URL(ParsedURLString, url));
if (!blobData) {
LOG_ERROR("Could not get blob data from a registry");
return;
}
BlobDataItemList::const_iterator it = blobData->items().begin();
const BlobDataItemList::const_iterator itend = blobData->items().end();
for (; it != itend; ++it) {
const BlobDataItem& blobItem = *it;
if (blobItem.type == BlobDataItem::Data)
formData->appendData(blobItem.data->data() + static_cast<int>(blobItem.offset), static_cast<int>(blobItem.length));
else if (blobItem.type == BlobDataItem::File)
formData->appendFileRange(blobItem.path, blobItem.offset, blobItem.length, blobItem.expectedModificationTime);
else if (blobItem.type == BlobDataItem::Blob)
appendBlobResolved(formData, blobItem.url);
else
ASSERT_NOT_REACHED();
}
}
