msh3

Minimal HTTP/3 library on top of microsoft/msquic and litespeedtech/ls-qpack. Currently supports:

• Sending and receiving request headers and payload.
• Static qpack encoding.
• Server validation can be optionally disabled ("unsecure" mode).

API

Client

const MSH3_REQUEST_IF Callbacks = { HeaderReceived, DataReceived, Complete, Shutdown, DataSend };

const MSH3_HEADER Headers[] = {
    { ":method", 7, "GET", 3 },
    { ":path", 5, Path, strlen(Path) },
    { ":scheme", 7, "https", 5 },
    { ":authority", 10, Host, strlen(Host) },
    { "accept", 6, "*/*", 3 },
};
const size_t HeadersCount = sizeof(Headers)/sizeof(MSH3_HEADER);

MSH3_API* Api = MsH3ApiOpen();
if (Api) {
    MSH3_CONNECTION* Connection = MsH3ConnectionOpen(Api, Host, Port, Unsecure);
    if (Connection) {
        MSH3_REQUEST* Request = MsH3RequestOpen(Connection, &Callbacks, NULL, Headers, HeadersCount, MSH3_REQUEST_FLAG_FIN);
        if (Request) {
            // ...
            MsH3RequestClose(Request);
        }
        MsH3ConnectionClose(Connection);
    }
    MsH3ApiClose(Api);
}

Server

Server is supported, but is not built by default to keep the library smaller for clients. To enable, set the MSH3_SERVER_SUPPORT option to on.

TODO - Add documentation

Build

git clone --recursive https://github.com/nibanks/msh3
cd msh3 && mkdir build && cd build

Linux

cmake -G 'Unix Makefiles' ..
cmake --build .

Windows

cmake -G 'Visual Studio 17 2022' -A x64 ..
cmake --build .

Run

msh3app outlook.office.com
msh3app www.cloudflare.com
msh3app www.google.com
msh3app nghttp2.org:4433