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95 lines
3.3 KiB
Markdown
95 lines
3.3 KiB
Markdown
---
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title: grpc-web
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keywords:
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- APISIX
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- Plugin
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- gRPC Web
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- grpc-web
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description: This document contains information about the Apache APISIX grpc-web Plugin.
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---
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<!--
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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-->
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## Description
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The `grpc-web` Plugin is a proxy Plugin that can process [gRPC Web](https://github.com/grpc/grpc-web) requests from JavaScript clients to a gRPC service.
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## Enabling the Plugin
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You can enable the `grpc-web` Plugin on a specific Route as shown below:
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```shell
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curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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{
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"uri":"/grpc/web/*",
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"plugins":{
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"grpc-web":{}
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},
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"upstream":{
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"scheme":"grpc",
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"type":"roundrobin",
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"nodes":{
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"127.0.0.1:1980":1
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}
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}
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}'
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```
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:::info IMPORTANT
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While using the `grpc-web` Plugin, always using a prefix matching pattern (`/*`, `/grpc/example/*`) for matching Routes. This is because the gRPC Web client passes the package name, the service interface name, the method name and other information in the proto in the URI. For example, `/path/a6.RouteService/Insert`.
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So, when absolute matching is used, the Plugin would not be hit and the information from the proto would not be extracted.
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:::
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## Example usage
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Refer to [gRPC-Web Client Runtime Library](https://www.npmjs.com/package/grpc-web) or [Apache APISIX gRPC Web Test Framework](https://github.com/apache/apisix/tree/master/t/plugin/grpc-web) to learn how to setup your web client.
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Once you have your gRPC Web client running, you can make a request to APISIX from the browser or through Node.js.
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:::note
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The supported request methods are `POST` and `OPTIONS`. See [CORS support](https://github.com/grpc/grpc-web/blob/master/doc/browser-features.md#cors-support).
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The supported `Content-Type` includes `application/grpc-web`, `application/grpc-web-text`, `application/grpc-web+proto`, and `application/grpc-web-text+proto`. See [Protocol differences vs gRPC over HTTP2](https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2).
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:::
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## Disable Plugin
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To disable the `grpc-web` Plugin, you can delete the corresponding JSON configuration from the Plugin configuration. APISIX will automatically reload and you do not have to restart for this to take effect.
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```shell
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curl http://127.0.0.1:9080/apisix/admin/routes/1 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
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{
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"uri":"/grpc/web/*",
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"plugins":{},
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"upstream":{
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"scheme":"grpc",
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"type":"roundrobin",
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"nodes":{
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"127.0.0.1:1980":1
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}
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}
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}'
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```
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