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Bug 1437114 - ExternalHelperAppChild should send data to the parent actor in chunks, r=froydnj

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This commit is contained in:
Andrea Marchesini 2018-02-12 17:41:34 +01:00
parent fd3aec925b
commit 910fc98873
1 changed files with 21 additions and 6 deletions
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27
uriloader/exthandler/ExternalHelperAppChild.cpp
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@ -43,13 +43,28 @@ ExternalHelperAppChild::OnDataAvailable(nsIRequest *request,
if (NS_FAILED(mStatus))
return mStatus;
nsCString data;
nsresult rv = NS_ReadInputStreamToString(input, data, count);
if (NS_FAILED(rv))
return rv;
static uint32_t const kCopyChunkSize = 128 * 1024;
uint32_t toRead = std::min<uint32_t>(count, kCopyChunkSize);
if (!SendOnDataAvailable(data, offset, count))
return NS_ERROR_UNEXPECTED;
nsCString data;
if (NS_WARN_IF(!data.SetCapacity(toRead, fallible))) {
return NS_ERROR_OUT_OF_MEMORY;
}
while (count) {
nsresult rv = NS_ReadInputStreamToString(input, data, toRead);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!SendOnDataAvailable(data, offset, toRead))) {
return NS_ERROR_UNEXPECTED;
}
count -= toRead;
offset += toRead;
toRead = std::min<uint32_t>(count, kCopyChunkSize);
}
return NS_OK;
}