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grpc-web-client
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Library for making gRPC-Web requests from a browser
This library is intended for both JavaScript and TypeScript usage from a web browser or NodeJS (see Usage with NodeJS).
Note: This only works if the server supports gRPC-Web
A Golang gRPC-Web middleware and a Golang-based gRPC-Web proxy are available here.
Please see the full gRPC-Web README for known limitations.
grpc-web-client
has peer dependencies of google-protobuf
and @types/google-protobuf
.
npm install google-protobuf @types/google-protobuf grpc-web-client --save
There is an example project available here
ts-protoc-gen
with protoc
to generate .js
and .d.ts
files for your request and response classes. ts-protoc-gen
can also generate gRPC service definitions with the service=true
argument.
unary()
, invoke()
or client()
import {grpc} from "grpc-web-client";
// Import code-generated data structures.
import {BookService} from "./generated/proto/examplecom/library/book_service_pb_service";
import {GetBookRequest} from "./generated/proto/examplecom/library/book_service_pb";
const getBookRequest = new GetBookRequest();
getBookRequest.setIsbn(60929871);
grpc.unary(BookService.GetBook, {
request: getBookRequest,
host: host,
onEnd: res => {
const { status, statusMessage, headers, message, trailers } = res;
if (status === grpc.Code.OK && message) {
console.log("all ok. got book: ", message.toObject());
}
}
});
const request = grpc.unary(BookService.GetBook, { ... });
request.cancel();
There are three functions for making gRPC requests:
grpc.unary
This is a convenience function for making requests that consist of a single request message and single response message. It can only be used with unary methods.
rpc GetBook(GetBookRequest) returns (Book) {}
grpc.invoke
This is a convenience function for making requests that consist of a single request message and a stream of response messages (server-streaming). It can also be used with unary methods.
rpc GetBook(GetBookRequest) returns (Book) {}
rpc QueryBooks(QueryBooksRequest) returns (stream Book) {}
grpc.client
grpc.client
returns a client. Dependant upon transport compatibility this client is capable of sending multiple request messages (client-streaming) and receiving multiple response messages (server-streaming). It can be used with any type of method, but will enforce limiting the sending of messages for unary methods.
rpc GetBook(GetBookRequest) returns (Book) {}
rpc QueryBooks(QueryBooksRequest) returns (stream Book) {}
rpc LogReadPages(stream PageRead) returns (google.protobuf.Empty) {}
rpc ListenForBooks(stream QueryBooksRequest) returns (stream Book) {}
Refer to grpc-web-node-http-transport.
FAQs
gRPC-Web client for browsers (JS/TS)
The npm package grpc-web-client receives a total of 34,533 weekly downloads. As such, grpc-web-client popularity was classified as popular.
We found that grpc-web-client demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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