internal

func CloudAuthMiddleware ¶

func CloudAuthMiddleware(callers []string, header string, rejected func(*router.Context)) router.MiddlewareChain

CloudAuthMiddleware returns a middleware chain that authorizes requests from Cloud Tasks and Cloud Scheduler.

Checks OpenID Connect tokens have us in the audience, and the email in them is in `callers` list.

If `header` is set, will also accept requests that have this header, regardless of its value. This is used to authorize GAE tasks and crons based on `X-AppEngine-*` headers.

func EnableOpenCensusTracing ¶

func EnableOpenCensusTracing()

EnableOpenCensusTracing installs OpenCensus as a tracing backend for LUCI packages.

func Sampler ¶

func Sampler(spec string) (trace.Sampler, error)

Sampler constructs an object that decides how often to sample traces.

The spec is a string in one of the forms:

• `X%` - to sample approximately X percent of requests.
• `Xqps` - to produce approximately X samples per second.

Returns an error if the spec can't be parsed.