SWFVerification this verification, the SWF file from the client to the server side to verify that in case of very large files, such as the 2M upload is necessary for a long time.Or the SWFVerification not upload the entire file, and that principle is what?
SWFVerification works by hashing the authorized SWFs first. Then it compares the hash of the client SWF with those maintained by the server.
So, no upload is required.
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