mirror of https://github.com/grpc/grpc-node.git
45 lines
2.4 KiB
Markdown
45 lines
2.4 KiB
Markdown
# Pure JavaScript gRPC Client
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## Installation
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Node 12 is recommended. The exact set of compatible Node versions can be found in the `engines` field of the `package.json` file.
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```sh
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npm install @grpc/grpc-js
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```
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## Documentation
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Documentation specifically for the `@grpc/grpc-js` package is currently not available. However, [documentation is available for the `grpc` package](https://grpc.github.io/grpc/node/grpc.html), and the two packages contain mostly the same interface. There are a few notable differences, however, and these differences are noted in the "Migrating from grpc" section below.
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## Features
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- Clients
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- Automatic reconnection
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- Servers
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- Streaming
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- Metadata
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- Partial compression support: clients can decompress response messages
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- Pick first and round robin load balancing policies
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- Client Interceptors
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- Connection Keepalives
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- HTTP Connect support (proxies)
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This library does not directly handle `.proto` files. To use `.proto` files with this library we recommend using the `@grpc/proto-loader` package.
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## Migrating from [`grpc`](https://www.npmjs.com/package/grpc)
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`@grpc/grpc-js` is almost a drop-in replacement for `grpc`, but you may need to make a few code changes to use it:
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- If you are currently loading `.proto` files using `grpc.load`, that function is not available in this library. You should instead load your `.proto` files using `@grpc/proto-loader` and load the resulting package definition objects into `@grpc/grpc-js` using `grpc.loadPackageDefinition`.
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- If you are currently loading packages generated by `grpc-tools`, you should instead generate your files using the `generate_package_definition` option in `grpc-tools`, then load the object exported by the generated file into `@grpc/grpc-js` using `grpc.loadPackageDefinition`.
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- If you have a server and you are using `Server#bind` to bind ports, you will need to use `Server#bindAsync` instead.
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## Some Notes on API Guarantees
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The public API of this library follows semantic versioning, with some caveats:
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- Some methods are prefixed with an underscore. These methods are internal and should not be considered part of the public API.
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- The class `Call` is only exposed due to limitations of TypeScript. It should not be considered part of the public API.
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- In general, any API that is exposed by this library but is not exposed by the `grpc` library is likely an error and should not be considered part of the public API.
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