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* add license headers to all source filesJoey Hess2017-04-30
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* control window and chattingJoey Hess2017-04-28
| | | | Works!
* Leave the prevMessage out of Activity serialization to save BW.Joey Hess2017-04-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do include it in the data that gets signed, so it can be recovered by trying each likely (recently seen) Activity as the prevMessage, and checking the signature. The UserState and DeveloperState already had the necessary state about recently seen hashes, so this does not impact data use. One tricky bit is that relayFromSocket needs to wait for the TMChan to be empty before calling restorePrevActivityHash. Otherwise, the hashes of items in the channel that have not been processed yet won't be tried. The TMChan is not really being used as a channel since only 1 item can be in it. It could be converted to a TMVar, but closeTMChan is used so I left it as a channel. Note that the server does not restore hashes of messages that pass through it; it's just a dumb relay. Sending a single key press now only needs 94 bytes of data to be sent, down from 169! --- Also switched to SHA512, since hashes are no longer being sent over the wire and so the larger size does not matter. SHA512 is slightly faster and more secure. This commit was sponsored by Ewen McNeill.
* switch wire message seralization to use protocol buffersJoey Hess2017-04-27
This way it's not tied to details of the haskell binary library, and implementations in other languages should be fairly simple to do. The haskell protobuf library was used because it does not need extra tooling or build steps. So I didn't write a .proto file, but one could fairly easily be written by following ProtocolBuffers.hs and translating it. ProtocolBuffers.hs is *extremely* repetative and tedious code. Surely there must be a way to not need to write all of that? Oh well, I wrote it.. Sizes of serialized messages: ">>> debug-me session started": 121 sending a single key press: 169 This seems equally as efficient as the binary serialization was; that was 165 bytes before elapsedTime was added. This commit was sponsored by Ethan Aubin.