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Description:

redditedgecontext 1.6.3

edgecontext
Python Documentation: https://reddit-edgecontext.readthedocs.io/en/latest/
Go Documentation: https://pkg.go.dev/github.com/reddit/edgecontext/lib/go/edgecontext
Services deep within the backend often need to know information about the
client that originated the request, such as what user is authenticated or what
country they're in. Baseplate services can get this information from the edge
context which is automatically propagated along with calls between services.
This library provides a Thrift specification of an edge context payload and a
corresponding implementation of the EdgeContextFactory interface from
Baseplate.py.
And an implementation of ecinterface from Baseplate.go.
Usage
Python
Add the EdgeContextFactory to application startup:
from baseplate import Baseplate
from baseplate.lib.secrets import secrets_store_from_config
from reddit_edgecontext import EdgeContextFactory

def make_processor(app_config):
secrets = secrets_store_from_config(app_config, timeout=60)
edgecontext_factory = EdgeContextFactory(secrets)

# pass edgecontext_factory to your framework's integration
# for Thrift: baseplate.frameworks.thrift.baseplateify_processor
# for Pyramid: baseplate.frameworks.pyramid.BaseplateConfigurator

Then read fields while handling requests:
def my_view(request):
return request.edge_context.user.id

See the documentation for all the available fields.
Go
Use edgecontext.Factory to create an ecinterface.Factory implementation
that's expected by baseplate.New:
ctx, bp, err := baseplate.New(context.Background(), baseplate.NewArgs{
ConfigPath: configPath,
ServiceCfg: &cfg, // or nil if you don't have additional config to parse
EdgeContextFactory: edgecontext.Factory(edgecontext.Config{
Logger: log.ErrorWithSentryWrapper(),
}),
})

When using it, get the *EdgeRequestContext object out of context:
if ec, ok := edgecontext.GetEdgeContext(ctx); ok {
user := ec.User()
loid, ok := user.LoID()
// Do something with loid
}

Development
A Dockerfile is provided to get a development environment running. To use it,
build the base Docker image:
$ docker build -t edgecontext .

And then fire up the environment and use the provided Makefile targets to do
common tasks:
$ docker run -it -v $PWD:/src --user "$(id -u):$(id -g)" -w /src edgecontext
$ make fmt

The following make targets are provided:

fmt: Apply automatic formatting to the source code.
thrift: Generate code from the Thrift IDL. Run fmt after doing this.
lint: Run linters on the code.
test: Run the test suite.
docs: Build docs.

Python output can be found in lib/py/build/html/.

The generated Thrift code is committed to the Git repo, so if you change
edgecontext.thrift make sure to run make thrift fmt and commit those
changes as well.
For Go, we do the same linting checks as Baseplate.go,
so please follow Baseplate.go's Editor guide to make sure you are doing the
same linting locally correctly.
Please also follow Baseplate.go's Style guide for code style.