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HTTP2 Client

A simple HTTP/2 client, created primarily to support gRPC.

Build

http2_client uses erlang.mk as build tool. On Unix systems it can be built with:

make

make edoc can be used to generate documentation for the individual modules from edoc comments in those modules.

See the erlang.mk documentation for an explanation on how the tool can be used in a Windows environment.

Dependencies

  • cowlib is used to compress and decompress the HTTP/2 headers.

Limitations

Http2_client implements only those features that are required by gRPC, it is not a complete implementation of the HTTP/2 spec. In particular it does not support:

  • Push promise. The gRPC protocol does not use it.

    The initial SETTINGS frame sent by the client will disable push promise messages, and if a push promise is received from the server this will result in a protocol error.

  • Priorization and dependency between streams. The API will not offer any support for sending PRIORITY frames to the server, and any PRIORITY frame that is received will be ignored.

License

Apache 2.0