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fb7dc13dfe
updated few packages in go.mod to latest available release. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
87 lines
5.0 KiB
Markdown
87 lines
5.0 KiB
Markdown
# Go gRPC Middleware
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[](https://travis-ci.org/grpc-ecosystem/go-grpc-middleware)
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[](https://goreportcard.com/report/github.com/grpc-ecosystem/go-grpc-middleware)
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[](https://godoc.org/github.com/grpc-ecosystem/go-grpc-middleware)
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[](https://sourcegraph.com/github.com/grpc-ecosystem/go-grpc-middleware/?badge)
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[](https://codecov.io/gh/grpc-ecosystem/go-grpc-middleware)
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[](LICENSE)
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[](#status)
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[](https://slack.com/share/IRUQCFC23/9Tm7hxRFVKKNoajQfMOcUiIk/enQtODc4ODI4NTIyMDcxLWM5NDA0ZTE4Njg5YjRjYWZkMTI5MzQwNDY3YzBjMzE1YzdjOGM5ZjI1NDNiM2JmNzI2YjM5ODE5OTRiNTEyOWE)
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[gRPC Go](https://github.com/grpc/grpc-go) Middleware: interceptors, helpers, utilities.
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## Middleware
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[gRPC Go](https://github.com/grpc/grpc-go) recently acquired support for
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Interceptors, i.e. [middleware](https://medium.com/@matryer/writing-middleware-in-golang-and-how-go-makes-it-so-much-fun-4375c1246e81#.gv7tdlghs)
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that is executed either on the gRPC Server before the request is passed onto the user's application logic, or on the gRPC client around the user call. It is a perfect way to implement
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common patterns: auth, logging, message, validation, retries or monitoring.
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These are generic building blocks that make it easy to build multiple microservices easily.
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The purpose of this repository is to act as a go-to point for such reusable functionality. It contains
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some of them itself, but also will link to useful external repos.
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`grpc_middleware` itself provides support for chaining interceptors, here's an example:
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```go
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import "github.com/grpc-ecosystem/go-grpc-middleware"
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myServer := grpc.NewServer(
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grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
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grpc_recovery.StreamServerInterceptor(),
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grpc_ctxtags.StreamServerInterceptor(),
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grpc_opentracing.StreamServerInterceptor(),
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grpc_prometheus.StreamServerInterceptor,
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grpc_zap.StreamServerInterceptor(zapLogger),
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grpc_auth.StreamServerInterceptor(myAuthFunction),
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)),
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grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
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grpc_recovery.UnaryServerInterceptor(),
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grpc_ctxtags.UnaryServerInterceptor(),
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grpc_opentracing.UnaryServerInterceptor(),
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grpc_prometheus.UnaryServerInterceptor,
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grpc_zap.UnaryServerInterceptor(zapLogger),
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grpc_auth.UnaryServerInterceptor(myAuthFunction),
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)),
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)
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```
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## Interceptors
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*Please send a PR to add new interceptors or middleware to this list*
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#### Auth
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* [`grpc_auth`](auth) - a customizable (via `AuthFunc`) piece of auth middleware
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#### Logging
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* [`grpc_ctxtags`](tags/) - a library that adds a `Tag` map to context, with data populated from request body
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* [`grpc_zap`](logging/zap/) - integration of [zap](https://github.com/uber-go/zap) logging library into gRPC handlers.
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* [`grpc_logrus`](logging/logrus/) - integration of [logrus](https://github.com/sirupsen/logrus) logging library into gRPC handlers.
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* [`grpc_kit`](logging/kit/) - integration of [go-kit](https://github.com/go-kit/kit/tree/master/log) logging library into gRPC handlers.
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* [`grpc_grpc_logsettable`](logging/settable/) - a wrapper around `grpclog.LoggerV2` that allows to replace loggers in runtime (thread-safe).
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#### Monitoring
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* [`grpc_prometheus`⚡](https://github.com/grpc-ecosystem/go-grpc-prometheus) - Prometheus client-side and server-side monitoring middleware
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* [`otgrpc`⚡](https://github.com/grpc-ecosystem/grpc-opentracing/tree/master/go/otgrpc) - [OpenTracing](http://opentracing.io/) client-side and server-side interceptors
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* [`grpc_opentracing`](tracing/opentracing) - [OpenTracing](http://opentracing.io/) client-side and server-side interceptors with support for streaming and handler-returned tags
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#### Client
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* [`grpc_retry`](retry/) - a generic gRPC response code retry mechanism, client-side middleware
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#### Server
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* [`grpc_validator`](validator/) - codegen inbound message validation from `.proto` options
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* [`grpc_recovery`](recovery/) - turn panics into gRPC errors
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* [`ratelimit`](ratelimit/) - grpc rate limiting by your own limiter
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## Status
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This code has been running in *production* since May 2016 as the basis of the gRPC micro services stack at [Improbable](https://improbable.io).
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Additional tooling will be added, and contributions are welcome.
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## License
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`go-grpc-middleware` is released under the Apache 2.0 license. See the [LICENSE](LICENSE) file for details.
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