Cronet is the Chromium network stack made available as a library. Cronet takes advantage of multiple technologies that reduce the latency and increase the throughput of the network requests.

The Cronet Library handles the requests of apps used by millions of people on a daily basis, such as YouTube, Google App, Google Photos, and Maps - Navigation & Transit.

See sleeyax/cronet-binaries for prebuilt cronet binaries.

1. Build cronet locally by following the instructions for Desktop builds from Google.
2. Copy all shared libraries from ~/chromium/src/out/Cronet/*.so to ./build/<os>/<arch>.
3. Rename libcronet.x.x.x.x.so to libcronet.so.
4. (optional) If you have a sysroot folder (e.g. for cross-compilation), copy it to ./build/<os>/<arch>/sysroot.

Before you begin, make sure you've followed the instructions above and have the prebuild and build utilities compiled:

$ go build -v -o prebuild ./cmd/prebuild
$ go build -v -o gobuild ./cmd/build

Then, download the required toolchain for your system:

$ ./prebuild

You only need to do these steps once per project.

Finally, build the example program with the build utility:

# dynamic linking
$  ./gobuild -v -o example ./cmd/example/main.go
# static linking (if enabled)
$ ./gobuild -v -o example -tags cronet_static -trimpath -ldflags "-s -w -buildid=" ./example
$ ./build/llvm/bin/llvm-strip ./example

By default, gobuild wraps the go build command. To run go test instead, specify test as the first argument:

$ ./gobuild test ./...

See the GitHub workflow for more details.