docs/zh/latest/plugins/grpc-transcode.md - apisix - Git at Google

 ---
 title: grpc-transcode
 keywords:
   - Apache APISIX
   - API 网关
   - Plugin
   - gRPC Web
   - grpc-web
 description: 本文介绍了关于 Apache APISIX `grpc-transcode` 插件的基本信息及使用方法。
 ---

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 #     http://www.apache.org/licenses/LICENSE-2.0
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 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
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 ## 描述

 使用 `grpc-transcode` 插件可以在 HTTP 和 gRPC 请求之间进行转换。

 APISIX 接收 HTTP 请求后，首先对请求进行转码，并将转码后的请求转发到 gRPC 服务，获取响应并以 HTTP 格式将其返回给客户端。

 <!-- TODO: use an image here to explain the concept better -->

 ## 属性

 | 名称      | 类型                                                                       | 必选项 | 默认值 | 描述                               |
 | --------- | -------------------------------------------------  | ----- | ------  ------------------------------ |
 | proto_id  | string/integer                                     | 是    |        | `.proto` 内容的 id。             |
 | service   | string                                             | 是    |        | gRPC 服务名。                    |
 | method    | string                                             | 是    |        | gRPC 服务中要调用的方法名。        |
 | deadline  | number                                             | 否    | 0      | gRPC 服务的 deadline，单位为：ms。 |
 | pb_option | array[string([pb_option_def](#pb_option-的选项))]    | 否    |        | proto 编码过程中的转换选项。       |
 | show_status_in_body  | boolean                                 | 否    | false    | 是否在返回体中展示解析过的 `grpc-status-details-bin` |
 | status_detail_type | string                                    | 否    |        | `grpc-status-details-bin` 中 [details](https://github.com/googleapis/googleapis/blob/b7cb84f5d42e6dba0fdcc2d8689313f6a8c9d7b9/google/rpc/status.proto#L46) 部分对应的 message type，如果不指定，此部分不进行解码  |

 ### pb_option 的选项

 | 类型            | 有效值                                                                                     |
 |-----------------|-------------------------------------------------------------------------------------------|
 | enum as result  | `enum_as_name`, `enum_as_value`                                                           |
 | int64 as result | `int64_as_number`, `int64_as_string`, `int64_as_hexstring`                                |
 | default values  | `auto_default_values`, `no_default_values`, `use_default_values`, `use_default_metatable` |
 | hooks           | `enable_hooks`, `disable_hooks`                                                           |

 ## 启用插件

 在启用插件之前，你必须将 `.proto` 或 `.pb` 文件的内容添加到 APISIX。

 可以使用 `/admin/protos/id` 接口将文件的内容添加到 `content` 字段：

 :::note

 您可以这样从 `config.yaml` 中获取 `admin_key` 并存入环境变量：

 ```bash
 admin_key=$(yq '.deployment.admin.admin_key[0].key' conf/config.yaml | sed 's/"//g')
 ```

 :::

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/protos/1 \
 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "content" : "syntax = \"proto3\";
     package helloworld;
     service Greeter {
         rpc SayHello (HelloRequest) returns (HelloReply) {}
     }
     message HelloRequest {
         string name = 1;
     }
     message HelloReply {
         string message = 1;
     }"
 }'
 ```

 如果你的 `.proto` 文件包含 `import`，或者想要把多个 `.proto` 文件合并成一个 proto，你可以生成一个 `.pb` 文件并在 APISIX 中使用它。

 假设已经有一个 `.proto` 文件（`proto/helloworld.proto`），它导入了另一个 `proto` 文件：

 ```proto
 syntax = "proto3";

 package helloworld;
 import "proto/import.proto";
 ...
 ```

 首先，让我们从 `.proto` 文件创建一个 `.pb` 文件。

 ```shell
 protoc --include_imports --descriptor_set_out=proto.pb proto/helloworld.proto
 ```

 输出的二进制文件 `proto.pb` 将同时包含 `helloworld.proto` 和 `import.proto`。

 然后将 `proto.pb` 的内容作为 proto 的 `content` 字段提交。

 由于 proto 的内容是二进制的，我们需要使用以下 shell 命令将其转换成 `base64`：

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/protos/1 \
 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "content" : "'"$(base64 -w0 /path/to/proto.pb)"'"
 }'
 ```

 返回 `HTTP/1.1 201 Created` 结果如下：

 ```
 {"node":{"value":{"create_time":1643879753,"update_time":1643883085,"content":"CmgKEnByb3RvL2ltcG9ydC5wcm90bxIDcGtnIhoKBFVzZXISEgoEbmFtZRgBIAEoCVIEbmFtZSIeCghSZXNwb25zZRISCgRib2R5GAEgASgJUgRib2R5QglaBy4vcHJvdG9iBnByb3RvMwq9AQoPcHJvdG8vc3JjLnByb3RvEgpoZWxsb3dvcmxkGhJwcm90by9pbXBvcnQucHJvdG8iPAoHUmVxdWVzdBIdCgR1c2VyGAEgASgLMgkucGtnLlVzZXJSBHVzZXISEgoEYm9keRgCIAEoCVIEYm9keTI5CgpUZXN0SW1wb3J0EisKA1J1bhITLmhlbGxvd29ybGQuUmVxdWVzdBoNLnBrZy5SZXNwb25zZSIAQglaBy4vcHJvdG9iBnByb3RvMw=="},"key":"\/apisix\/proto\/1"}}
 ```

 现在我们可以在指定路由中启用 `grpc-transcode` 插件：

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/routes/1 \
 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "methods": ["GET"],
     "uri": "/grpctest",
     "plugins": {
         "grpc-transcode": {
          "proto_id": "1",
          "service": "helloworld.Greeter",
          "method": "SayHello"
         }
     },
     "upstream": {
         "scheme": "grpc",
         "type": "roundrobin",
         "nodes": {
             "127.0.0.1:50051": 1
         }
     }
 }'
 ```

 :::note

 此处使用的 Upstream 应该是 gRPC 服务。请注意，`scheme` 需要设置为 `grpc`。

 可以使用 [grpc_server_example](https://github.com/api7/grpc_server_example) 进行测试。

 :::

 ## 测试插件

 通过上述示例配置插件后，你可以向 APISIX 发出请求以从 gRPC 服务（通过 APISIX）获得响应：

 访问上面配置的 route：

 ```shell
 curl -i http://127.0.0.1:9080/grpctest?name=world
 ```

 返回结果

 ```Shell
 HTTP/1.1 200 OK
 Date: Fri, 16 Aug 2019 11:55:36 GMT
 Content-Type: application/json
 Transfer-Encoding: chunked
 Connection: keep-alive
 Server: APISIX web server
 Proxy-Connection: keep-alive

 {"message":"Hello world"}
 ```

 你也可以配置 `pb_option`，如下所示：

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/routes/23 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "methods": ["GET"],
     "uri": "/zeebe/WorkflowInstanceCreate",
     "plugins": {
         "grpc-transcode": {
             "proto_id": "1",
             "service": "gateway_protocol.Gateway",
             "method": "CreateWorkflowInstance",
             "pb_option":["int64_as_string"]
         }
     },
     "upstream": {
         "scheme": "grpc",
         "type": "roundrobin",
         "nodes": {
             "127.0.0.1:26500": 1
         }
     }
 }'
 ```

 可以通过如下命令检查刚刚配置的路由：

 ```shell
 curl -i "http://127.0.0.1:9080/zeebe/WorkflowInstanceCreate?bpmnProcessId=order-process&version=1&variables=\{\"orderId\":\"7\",\"ordervalue\":99\}"
 ```

 ```Shell
 HTTP/1.1 200 OK
 Date: Wed, 13 Nov 2019 03:38:27 GMT
 Content-Type: application/json
 Transfer-Encoding: chunked
 Connection: keep-alive
 grpc-encoding: identity
 grpc-accept-encoding: gzip
 Server: APISIX web server
 Trailer: grpc-status
 Trailer: grpc-message

 {"workflowKey":"#2251799813685260","workflowInstanceKey":"#2251799813688013","bpmnProcessId":"order-process","version":1}
 ```

 ## 在返回体中展示 `grpc-status-details-bin`

 如果 gRPC 服务返回了错误，返回头中可能存在 `grpc-status-details-bin` 字段对错误进行描述，你可以解码该字段，并展示在返回体中。

 上传 proto 文件：

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/protos/1 \
 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "content" : "syntax = \"proto3\";
     package helloworld;
     service Greeter {
         rpc GetErrResp (HelloRequest) returns (HelloReply) {}
     }
     message HelloRequest {
         string name = 1;
         repeated string items = 2;
     }
     message HelloReply {
         string message = 1;
         repeated string items = 2;
     }"
 }'
 ```

 启用 `grpc-transcode` 插件，并设置选项 `show_status_in_body` 为 `true`：

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/routes/1 \
 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "methods": ["GET"],
     "uri": "/grpctest",
     "plugins": {
         "grpc-transcode": {
          "proto_id": "1",
          "service": "helloworld.Greeter",
          "method": "GetErrResp",
          "show_status_in_body": true
         }
     },
     "upstream": {
         "scheme": "grpc",
         "type": "roundrobin",
         "nodes": {
             "127.0.0.1:50051": 1
         }
     }
 }'
 ```

 访问上面配置的 route：

 ```shell
 curl -i http://127.0.0.1:9080/grpctest?name=world
 ```

 返回结果

 ```Shell
 HTTP/1.1 503 Service Temporarily Unavailable
 Date: Wed, 10 Aug 2022 08:59:46 GMT
 Content-Type: application/json
 Transfer-Encoding: chunked
 Connection: keep-alive
 grpc-status: 14
 grpc-message: Out of service
 grpc-status-details-bin: CA4SDk91dCBvZiBzZXJ2aWNlGlcKKnR5cGUuZ29vZ2xlYXBpcy5jb20vaGVsbG93b3JsZC5FcnJvckRldGFpbBIpCAESHFRoZSBzZXJ2ZXIgaXMgb3V0IG9mIHNlcnZpY2UaB3NlcnZpY2U
 Server: APISIX web server

 {"error":{"details":[{"type_url":"type.googleapis.com\/helloworld.ErrorDetail","value":"\b\u0001\u0012\u001cThe server is out of service\u001a\u0007service"}],"message":"Out of service","code":14}}
 ```

 注意返回体中还存在未解码的字段，如果需要解码该字段，需要在上传的 proto 文件中加上该字段对应的 `message type`。

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/protos/1 \
 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "content" : "syntax = \"proto3\";
     package helloworld;
     service Greeter {
         rpc GetErrResp (HelloRequest) returns (HelloReply) {}
     }
     message HelloRequest {
         string name = 1;
         repeated string items = 2;
     }
     message HelloReply {
         string message = 1;
         repeated string items = 2;
     }
     message ErrorDetail {
         int64 code = 1;
         string message = 2;
         string type = 3;
     }"
 }'
 ```

 同时配置选项 `status_detail_type` 为 `helloworld.ErrorDetail`：

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/routes/1 \
 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "methods": ["GET"],
     "uri": "/grpctest",
     "plugins": {
         "grpc-transcode": {
          "proto_id": "1",
          "service": "helloworld.Greeter",
          "method": "GetErrResp",
          "show_status_in_body": true,
          "status_detail_type": "helloworld.ErrorDetail"
         }
     },
     "upstream": {
         "scheme": "grpc",
         "type": "roundrobin",
         "nodes": {
             "127.0.0.1:50051": 1
         }
     }
 }'
 ```

 此时就能返回完全解码后的结果

 ```Shell
 HTTP/1.1 503 Service Temporarily Unavailable
 Date: Wed, 10 Aug 2022 09:02:46 GMT
 Content-Type: application/json
 Transfer-Encoding: chunked
 Connection: keep-alive
 grpc-status: 14
 grpc-message: Out of service
 grpc-status-details-bin: CA4SDk91dCBvZiBzZXJ2aWNlGlcKKnR5cGUuZ29vZ2xlYXBpcy5jb20vaGVsbG93b3JsZC5FcnJvckRldGFpbBIpCAESHFRoZSBzZXJ2ZXIgaXMgb3V0IG9mIHNlcnZpY2UaB3NlcnZpY2U
 Server: APISIX web server

 {"error":{"details":[{"type":"service","message":"The server is out of service","code":1}],"message":"Out of service","code":14}}
 ```

 ## 删除插件

 当你需要禁用 `grpc-transcode` 插件时，可以通过以下命令删除相应的 JSON 配置，APISIX 将会自动重新加载相关配置，无需重启服务：

 ```shell
 curl http://127.0.0.1:9180/apisix/admin/routes/111 -H "X-API-KEY: $admin_key" -X PUT -d '
 {
     "uri": "/grpctest",
     "plugins": {},
     "upstream": {
         "scheme": "grpc",
         "type": "roundrobin",
         "nodes": {
             "127.0.0.1:50051": 1
         }
     }
 }'
 ```
	---
	title: grpc-transcode
	keywords:
	- Apache APISIX
	- API 网关
	- Plugin
	- gRPC Web
	- grpc-web
	description: 本文介绍了关于 Apache APISIX `grpc-transcode` 插件的基本信息及使用方法。
	---

	<!--
	#
	# Licensed to the Apache Software Foundation (ASF) under one or more
	# contributor license agreements. See the NOTICE file distributed with
	# this work for additional information regarding copyright ownership.
	# The ASF licenses this file to You under the Apache License, Version 2.0
	# (the "License"); you may not use this file except in compliance with
	# the License. You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	#
	-->

	## 描述

	使用 `grpc-transcode` 插件可以在 HTTP 和 gRPC 请求之间进行转换。

	APISIX 接收 HTTP 请求后，首先对请求进行转码，并将转码后的请求转发到 gRPC 服务，获取响应并以 HTTP 格式将其返回给客户端。

	<!-- TODO: use an image here to explain the concept better -->

	## 属性

	\| 名称 \| 类型 \| 必选项 \| 默认值 \| 描述 \|
	\| --------- \| ------------------------------------------------- \| ----- \| ------ ------------------------------ \|
	\| proto_id \| string/integer \| 是 \| \| `.proto` 内容的 id。 \|
	\| service \| string \| 是 \| \| gRPC 服务名。 \|
	\| method \| string \| 是 \| \| gRPC 服务中要调用的方法名。 \|
	\| deadline \| number \| 否 \| 0 \| gRPC 服务的 deadline，单位为：ms。 \|
	\| pb_option \| array[string([pb_option_def](#pb_option-的选项))] \| 否 \| \| proto 编码过程中的转换选项。 \|
	\| show_status_in_body \| boolean \| 否 \| false \| 是否在返回体中展示解析过的 `grpc-status-details-bin` \|
	\| status_detail_type \| string \| 否 \| \| `grpc-status-details-bin` 中 [details](https://github.com/googleapis/googleapis/blob/b7cb84f5d42e6dba0fdcc2d8689313f6a8c9d7b9/google/rpc/status.proto#L46) 部分对应的 message type，如果不指定，此部分不进行解码 \|

	### pb_option 的选项

	\| 类型 \| 有效值 \|
	\|-----------------\|-------------------------------------------------------------------------------------------\|
	\| enum as result \| `enum_as_name`, `enum_as_value` \|
	\| int64 as result \| `int64_as_number`, `int64_as_string`, `int64_as_hexstring` \|
	\| default values \| `auto_default_values`, `no_default_values`, `use_default_values`, `use_default_metatable` \|
	\| hooks \| `enable_hooks`, `disable_hooks` \|

	## 启用插件

	在启用插件之前，你必须将 `.proto` 或 `.pb` 文件的内容添加到 APISIX。

	可以使用 `/admin/protos/id` 接口将文件的内容添加到 `content` 字段：

	:::note

	您可以这样从 `config.yaml` 中获取 `admin_key` 并存入环境变量：

	```bash
	admin_key=$(yq '.deployment.admin.admin_key[0].key' conf/config.yaml \| sed 's/"//g')
	```

	:::

	```shell
	curl http://127.0.0.1:9180/apisix/admin/protos/1 \
	-H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"content" : "syntax = \"proto3\";
	package helloworld;
	service Greeter {
	rpc SayHello (HelloRequest) returns (HelloReply) {}
	}
	message HelloRequest {
	string name = 1;
	}
	message HelloReply {
	string message = 1;
	}"
	}'
	```

	如果你的 `.proto` 文件包含 `import`，或者想要把多个 `.proto` 文件合并成一个 proto，你可以生成一个 `.pb` 文件并在 APISIX 中使用它。

	假设已经有一个 `.proto` 文件（`proto/helloworld.proto`），它导入了另一个 `proto` 文件：

	```proto
	syntax = "proto3";

	package helloworld;
	import "proto/import.proto";
	...
	```

	首先，让我们从 `.proto` 文件创建一个 `.pb` 文件。

	```shell
	protoc --include_imports --descriptor_set_out=proto.pb proto/helloworld.proto
	```

	输出的二进制文件 `proto.pb` 将同时包含 `helloworld.proto` 和 `import.proto`。

	然后将 `proto.pb` 的内容作为 proto 的 `content` 字段提交。

	由于 proto 的内容是二进制的，我们需要使用以下 shell 命令将其转换成 `base64`：

	```shell
	curl http://127.0.0.1:9180/apisix/admin/protos/1 \
	-H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"content" : "'"$(base64 -w0 /path/to/proto.pb)"'"
	}'
	```

	返回 `HTTP/1.1 201 Created` 结果如下：

	```
	{"node":{"value":{"create_time":1643879753,"update_time":1643883085,"content":"CmgKEnByb3RvL2ltcG9ydC5wcm90bxIDcGtnIhoKBFVzZXISEgoEbmFtZRgBIAEoCVIEbmFtZSIeCghSZXNwb25zZRISCgRib2R5GAEgASgJUgRib2R5QglaBy4vcHJvdG9iBnByb3RvMwq9AQoPcHJvdG8vc3JjLnByb3RvEgpoZWxsb3dvcmxkGhJwcm90by9pbXBvcnQucHJvdG8iPAoHUmVxdWVzdBIdCgR1c2VyGAEgASgLMgkucGtnLlVzZXJSBHVzZXISEgoEYm9keRgCIAEoCVIEYm9keTI5CgpUZXN0SW1wb3J0EisKA1J1bhITLmhlbGxvd29ybGQuUmVxdWVzdBoNLnBrZy5SZXNwb25zZSIAQglaBy4vcHJvdG9iBnByb3RvMw=="},"key":"\/apisix\/proto\/1"}}
	```

	现在我们可以在指定路由中启用 `grpc-transcode` 插件：

	```shell
	curl http://127.0.0.1:9180/apisix/admin/routes/1 \
	-H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"methods": ["GET"],
	"uri": "/grpctest",
	"plugins": {
	"grpc-transcode": {
	"proto_id": "1",
	"service": "helloworld.Greeter",
	"method": "SayHello"
	}
	},
	"upstream": {
	"scheme": "grpc",
	"type": "roundrobin",
	"nodes": {
	"127.0.0.1:50051": 1
	}
	}
	}'
	```

	:::note

	此处使用的 Upstream 应该是 gRPC 服务。请注意，`scheme` 需要设置为 `grpc`。

	可以使用 [grpc_server_example](https://github.com/api7/grpc_server_example) 进行测试。

	:::

	## 测试插件

	通过上述示例配置插件后，你可以向 APISIX 发出请求以从 gRPC 服务（通过 APISIX）获得响应：

	访问上面配置的 route：

	```shell
	curl -i http://127.0.0.1:9080/grpctest?name=world
	```

	返回结果

	```Shell
	HTTP/1.1 200 OK
	Date: Fri, 16 Aug 2019 11:55:36 GMT
	Content-Type: application/json
	Transfer-Encoding: chunked
	Connection: keep-alive
	Server: APISIX web server
	Proxy-Connection: keep-alive

	{"message":"Hello world"}
	```

	你也可以配置 `pb_option`，如下所示：

	```shell
	curl http://127.0.0.1:9180/apisix/admin/routes/23 -H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"methods": ["GET"],
	"uri": "/zeebe/WorkflowInstanceCreate",
	"plugins": {
	"grpc-transcode": {
	"proto_id": "1",
	"service": "gateway_protocol.Gateway",
	"method": "CreateWorkflowInstance",
	"pb_option":["int64_as_string"]
	}
	},
	"upstream": {
	"scheme": "grpc",
	"type": "roundrobin",
	"nodes": {
	"127.0.0.1:26500": 1
	}
	}
	}'
	```

	可以通过如下命令检查刚刚配置的路由：

	```shell
	curl -i "http://127.0.0.1:9080/zeebe/WorkflowInstanceCreate?bpmnProcessId=order-process&version=1&variables=\{\"orderId\":\"7\",\"ordervalue\":99\}"
	```

	```Shell
	HTTP/1.1 200 OK
	Date: Wed, 13 Nov 2019 03:38:27 GMT
	Content-Type: application/json
	Transfer-Encoding: chunked
	Connection: keep-alive
	grpc-encoding: identity
	grpc-accept-encoding: gzip
	Server: APISIX web server
	Trailer: grpc-status
	Trailer: grpc-message

	{"workflowKey":"#2251799813685260","workflowInstanceKey":"#2251799813688013","bpmnProcessId":"order-process","version":1}
	```

	## 在返回体中展示 `grpc-status-details-bin`

	如果 gRPC 服务返回了错误，返回头中可能存在 `grpc-status-details-bin` 字段对错误进行描述，你可以解码该字段，并展示在返回体中。

	上传 proto 文件：

	```shell
	curl http://127.0.0.1:9180/apisix/admin/protos/1 \
	-H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"content" : "syntax = \"proto3\";
	package helloworld;
	service Greeter {
	rpc GetErrResp (HelloRequest) returns (HelloReply) {}
	}
	message HelloRequest {
	string name = 1;
	repeated string items = 2;
	}
	message HelloReply {
	string message = 1;
	repeated string items = 2;
	}"
	}'
	```

	启用 `grpc-transcode` 插件，并设置选项 `show_status_in_body` 为 `true`：

	```shell
	curl http://127.0.0.1:9180/apisix/admin/routes/1 \
	-H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"methods": ["GET"],
	"uri": "/grpctest",
	"plugins": {
	"grpc-transcode": {
	"proto_id": "1",
	"service": "helloworld.Greeter",
	"method": "GetErrResp",
	"show_status_in_body": true
	}
	},
	"upstream": {
	"scheme": "grpc",
	"type": "roundrobin",
	"nodes": {
	"127.0.0.1:50051": 1
	}
	}
	}'
	```

	访问上面配置的 route：

	```shell
	curl -i http://127.0.0.1:9080/grpctest?name=world
	```

	返回结果

	```Shell
	HTTP/1.1 503 Service Temporarily Unavailable
	Date: Wed, 10 Aug 2022 08:59:46 GMT
	Content-Type: application/json
	Transfer-Encoding: chunked
	Connection: keep-alive
	grpc-status: 14
	grpc-message: Out of service
	grpc-status-details-bin: CA4SDk91dCBvZiBzZXJ2aWNlGlcKKnR5cGUuZ29vZ2xlYXBpcy5jb20vaGVsbG93b3JsZC5FcnJvckRldGFpbBIpCAESHFRoZSBzZXJ2ZXIgaXMgb3V0IG9mIHNlcnZpY2UaB3NlcnZpY2U
	Server: APISIX web server

	{"error":{"details":[{"type_url":"type.googleapis.com\/helloworld.ErrorDetail","value":"\b\u0001\u0012\u001cThe server is out of service\u001a\u0007service"}],"message":"Out of service","code":14}}
	```

	注意返回体中还存在未解码的字段，如果需要解码该字段，需要在上传的 proto 文件中加上该字段对应的 `message type`。

	```shell
	curl http://127.0.0.1:9180/apisix/admin/protos/1 \
	-H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"content" : "syntax = \"proto3\";
	package helloworld;
	service Greeter {
	rpc GetErrResp (HelloRequest) returns (HelloReply) {}
	}
	message HelloRequest {
	string name = 1;
	repeated string items = 2;
	}
	message HelloReply {
	string message = 1;
	repeated string items = 2;
	}
	message ErrorDetail {
	int64 code = 1;
	string message = 2;
	string type = 3;
	}"
	}'
	```

	同时配置选项 `status_detail_type` 为 `helloworld.ErrorDetail`：

	```shell
	curl http://127.0.0.1:9180/apisix/admin/routes/1 \
	-H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"methods": ["GET"],
	"uri": "/grpctest",
	"plugins": {
	"grpc-transcode": {
	"proto_id": "1",
	"service": "helloworld.Greeter",
	"method": "GetErrResp",
	"show_status_in_body": true,
	"status_detail_type": "helloworld.ErrorDetail"
	}
	},
	"upstream": {
	"scheme": "grpc",
	"type": "roundrobin",
	"nodes": {
	"127.0.0.1:50051": 1
	}
	}
	}'
	```

	此时就能返回完全解码后的结果

	```Shell
	HTTP/1.1 503 Service Temporarily Unavailable
	Date: Wed, 10 Aug 2022 09:02:46 GMT
	Content-Type: application/json
	Transfer-Encoding: chunked
	Connection: keep-alive
	grpc-status: 14
	grpc-message: Out of service
	grpc-status-details-bin: CA4SDk91dCBvZiBzZXJ2aWNlGlcKKnR5cGUuZ29vZ2xlYXBpcy5jb20vaGVsbG93b3JsZC5FcnJvckRldGFpbBIpCAESHFRoZSBzZXJ2ZXIgaXMgb3V0IG9mIHNlcnZpY2UaB3NlcnZpY2U
	Server: APISIX web server

	{"error":{"details":[{"type":"service","message":"The server is out of service","code":1}],"message":"Out of service","code":14}}
	```

	## 删除插件

	当你需要禁用 `grpc-transcode` 插件时，可以通过以下命令删除相应的 JSON 配置，APISIX 将会自动重新加载相关配置，无需重启服务：

	```shell
	curl http://127.0.0.1:9180/apisix/admin/routes/111 -H "X-API-KEY: $admin_key" -X PUT -d '
	{
	"uri": "/grpctest",
	"plugins": {},
	"upstream": {
	"scheme": "grpc",
	"type": "roundrobin",
	"nodes": {
	"127.0.0.1:50051": 1
	}
	}
	}'
	```