feat(grpc-reflection): created new grpc-reflection package ported from nestjs-grpc-reflection library

This commit is contained in:
Justin Timmons 2023-11-02 14:07:40 -04:00
parent 779e970099
commit 54df17727f
37 changed files with 1976 additions and 2 deletions

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@ -46,3 +46,11 @@ Directory: [`packages/grpc-health-check`](https://github.com/grpc/grpc-node/tree
npm package: [grpc-health-check](https://www.npmjs.com/package/grpc-health-check)
Health check service for gRPC servers.
### gRPC Reflection API Service
Directory: [`packages/grpc-reflection`](https://github.com/grpc/grpc-node/tree/master/packages/grpc-reflection)
npm package: [@grpc/reflection](https://www.npmjs.com/package/@grpc/reflection)
Reflection API service for gRPC servers.

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@ -19,10 +19,11 @@ import * as gulp from 'gulp';
import * as healthCheck from './packages/grpc-health-check/gulpfile';
import * as jsCore from './packages/grpc-js/gulpfile';
import * as jsXds from './packages/grpc-js-xds/gulpfile';
import * as reflection from './packages/grpc-reflection/gulpfile';
import * as protobuf from './packages/proto-loader/gulpfile';
import * as internalTest from './test/gulpfile';
const installAll = gulp.series(jsCore.install, healthCheck.install, protobuf.install, internalTest.install, jsXds.install);
const installAll = gulp.series(jsCore.install, healthCheck.install, protobuf.install, internalTest.install, jsXds.install, reflection.install);
const lint = gulp.parallel(jsCore.lint);
@ -36,7 +37,7 @@ const clean = gulp.series(jsCore.clean, protobuf.clean, jsXds.clean);
const cleanAll = gulp.series(jsXds.cleanAll, jsCore.cleanAll, internalTest.cleanAll, protobuf.cleanAll);
const nativeTestOnly = gulp.parallel(healthCheck.test);
const nativeTestOnly = gulp.parallel(healthCheck.test, reflection.test);
const nativeTest = gulp.series(build, nativeTestOnly);

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@ -0,0 +1,201 @@
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@ -0,0 +1,42 @@
# gRPC Reflection
gRPC reflection API service for use with gRPC-node.
## Background
This package provides an implementation of the [gRPC Server Reflection Protocol](https://github.com/grpc/grpc/blob/master/doc/server-reflection.md) service which can be added to an existing gRPC server. Adding this service to your server will allow clients [such as postman](https://blog.postman.com/postman-now-supports-grpc/) to dynamically load the API specification from your running application rather than needing to pass around and load proto files manually.
![example of reflection working with postman](https://gitlab.com/jtimmons/nestjs-grpc-reflection-module/-/raw/master/images/example.gif)
## Installation
Use the package manager [npm](https://www.npmjs.com/get-npm) to install `@grpc/reflection`.
```bash
npm install @grpc/reflection
```
## Usage
Any gRPC-node server can use `@grpc/reflection` to expose reflection information about their gRPC API.
```typescript
import { ReflectionServer } from '@grpc/reflection';
const pkg = protoLoader.load(...); // Load your gRPC package definition as normal
// Create the reflection implementation based on your gRPC package and add it to your existing server
const reflection = new ReflectionServer(pkg);
reflection.addToServer(server);
```
Congrats! Your server now allows any client to request reflection information about its API.
## Contributing
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change. The original proposal for this library can be found in [gRFC L108](https://github.com/grpc/proposal/blob/master/L108-node-grpc-reflection-library.md)
Please make sure to update tests as appropriate.
## License
[Apache License 2.0](https://choosealicense.com/licenses/apache-2.0/)

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@ -0,0 +1,50 @@
/*
* Copyright 2019 gRPC authors.
*
* Licensed 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.
*
*/
import * as gulp from 'gulp';
import * as mocha from 'gulp-mocha';
import * as execa from 'execa';
import * as path from 'path';
const reflectionDir = __dirname;
const outDir = path.resolve(reflectionDir, 'build');
const execNpmVerb = (verb: string, ...args: string[]) =>
execa('npm', [verb, ...args], {cwd: reflectionDir, stdio: 'inherit'});
const execNpmCommand = execNpmVerb.bind(null, 'run');
const install = () => execNpmVerb('install', '--unsafe-perm');
/**
* Transpiles TypeScript files in src/ to JavaScript according to the settings
* found in tsconfig.json.
*/
const compile = () => execNpmCommand('compile');
const runTests = () => {
return gulp.src(`${outDir}/test/**/*.js`)
.pipe(mocha({reporter: 'mocha-jenkins-reporter',
require: ['ts-node/register']}));
};
const test = gulp.series(install, runTests);
export {
install,
compile,
test
}

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{
"name": "@grpc/reflection",
"version": "1.0.0",
"author": "Justin Timmons",
"description": "Reflection API service for use with gRPC-node",
"repository": {
"type": "git",
"url": "https://github.com/grpc/grpc-node.git",
"directory": "packages/grpc-reflection"
},
"bugs": "https://github.com/grpc/grpc-node/issues",
"contributors": [
{
"name": "Justin Timmons",
"email": "justinmtimmons@gmail.com"
}
],
"files": [
"LICENSE",
"README.md",
"src",
"build",
"proto"
],
"license": "Apache-2.0",
"scripts": {
"compile": "tsc -p .",
"postcompile": "copyfiles './proto/**/*.proto' build/",
"prepare": "npm run generate-types && npm run compile",
"test": "mocha --require ts-node/register test/**.ts",
"generate-types": "proto-loader-gen-types --longs String --enums String --bytes Array --defaults --oneofs --includeComments --includeDirs proto/ -O src/generated grpc/reflection/v1/reflection.proto grpc/reflection/v1alpha/reflection.proto"
},
"dependencies": {
"google-protobuf": "^3.21.2"
},
"peerDependencies": {
"@grpc/grpc-js": ">=1.5.4",
"@grpc/proto-loader": ">=0.6.9"
},
"devDependencies": {
"@grpc/grpc-js": "^1.8.21",
"@grpc/proto-loader": "^0.7.10",
"@types/google-protobuf": "^3.15.7",
"copyfiles": "^2.4.1",
"typescript": "^5.2.2"
}
}

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// Taken from spec https://raw.githubusercontent.com/grpc/grpc/master/src/proto/grpc/reflection/v1/reflection.proto
// Additional versions can be found here: https://github.com/grpc/grpc/tree/master/src/proto/grpc/reflection
// Copyright 2016 The gRPC Authors
//
// Licensed 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.
// Service exported by server reflection. A more complete description of how
// server reflection works can be found at
// https://github.com/grpc/grpc/blob/master/doc/server-reflection.md
//
// The canonical version of this proto can be found at
// https://github.com/grpc/grpc-proto/blob/master/grpc/reflection/v1/reflection.proto
syntax = "proto3";
package grpc.reflection.v1;
option go_package = "google.golang.org/grpc/reflection/grpc_reflection_v1";
option java_multiple_files = true;
option java_package = "io.grpc.reflection.v1";
option java_outer_classname = "ServerReflectionProto";
service ServerReflection {
// The reflection service is structured as a bidirectional stream, ensuring
// all related requests go to a single server.
rpc ServerReflectionInfo(stream ServerReflectionRequest)
returns (stream ServerReflectionResponse);
}
// The message sent by the client when calling ServerReflectionInfo method.
message ServerReflectionRequest {
string host = 1;
// To use reflection service, the client should set one of the following
// fields in message_request. The server distinguishes requests by their
// defined field and then handles them using corresponding methods.
oneof message_request {
// Find a proto file by the file name.
string file_by_filename = 3;
// Find the proto file that declares the given fully-qualified symbol name.
// This field should be a fully-qualified symbol name
// (e.g. <package>.<service>[.<method>] or <package>.<type>).
string file_containing_symbol = 4;
// Find the proto file which defines an extension extending the given
// message type with the given field number.
ExtensionRequest file_containing_extension = 5;
// Finds the tag numbers used by all known extensions of the given message
// type, and appends them to ExtensionNumberResponse in an undefined order.
// Its corresponding method is best-effort: it's not guaranteed that the
// reflection service will implement this method, and it's not guaranteed
// that this method will provide all extensions. Returns
// StatusCode::UNIMPLEMENTED if it's not implemented.
// This field should be a fully-qualified type name. The format is
// <package>.<type>
string all_extension_numbers_of_type = 6;
// List the full names of registered services. The content will not be
// checked.
string list_services = 7;
}
}
// The type name and extension number sent by the client when requesting
// file_containing_extension.
message ExtensionRequest {
// Fully-qualified type name. The format should be <package>.<type>
string containing_type = 1;
int32 extension_number = 2;
}
// The message sent by the server to answer ServerReflectionInfo method.
message ServerReflectionResponse {
string valid_host = 1;
ServerReflectionRequest original_request = 2;
// The server sets one of the following fields according to the message_request
// in the request.
oneof message_response {
// This message is used to answer file_by_filename, file_containing_symbol,
// file_containing_extension requests with transitive dependencies.
// As the repeated label is not allowed in oneof fields, we use a
// FileDescriptorResponse message to encapsulate the repeated fields.
// The reflection service is allowed to avoid sending FileDescriptorProtos
// that were previously sent in response to earlier requests in the stream.
FileDescriptorResponse file_descriptor_response = 4;
// This message is used to answer all_extension_numbers_of_type requests.
ExtensionNumberResponse all_extension_numbers_response = 5;
// This message is used to answer list_services requests.
ListServiceResponse list_services_response = 6;
// This message is used when an error occurs.
ErrorResponse error_response = 7;
}
}
// Serialized FileDescriptorProto messages sent by the server answering
// a file_by_filename, file_containing_symbol, or file_containing_extension
// request.
message FileDescriptorResponse {
// Serialized FileDescriptorProto messages. We avoid taking a dependency on
// descriptor.proto, which uses proto2 only features, by making them opaque
// bytes instead.
repeated bytes file_descriptor_proto = 1;
}
// A list of extension numbers sent by the server answering
// all_extension_numbers_of_type request.
message ExtensionNumberResponse {
// Full name of the base type, including the package name. The format
// is <package>.<type>
string base_type_name = 1;
repeated int32 extension_number = 2;
}
// A list of ServiceResponse sent by the server answering list_services request.
message ListServiceResponse {
// The information of each service may be expanded in the future, so we use
// ServiceResponse message to encapsulate it.
repeated ServiceResponse service = 1;
}
// The information of a single service used by ListServiceResponse to answer
// list_services request.
message ServiceResponse {
// Full name of a registered service, including its package name. The format
// is <package>.<service>
string name = 1;
}
// The error code and error message sent by the server when an error occurs.
message ErrorResponse {
// This field uses the error codes defined in grpc::StatusCode.
int32 error_code = 1;
string error_message = 2;
}

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// Taken from spec https://raw.githubusercontent.com/grpc/grpc/master/src/proto/grpc/reflection/v1alpha/reflection.proto
// Additional versions can be found here: https://github.com/grpc/grpc/tree/master/src/proto/grpc/reflection
// Copyright 2016 gRPC authors.
//
// Licensed 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.
// Service exported by server reflection
syntax = "proto3";
package grpc.reflection.v1alpha;
service ServerReflection {
// The reflection service is structured as a bidirectional stream, ensuring
// all related requests go to a single server.
rpc ServerReflectionInfo(stream ServerReflectionRequest)
returns (stream ServerReflectionResponse);
}
// The message sent by the client when calling ServerReflectionInfo method.
message ServerReflectionRequest {
string host = 1;
// To use reflection service, the client should set one of the following
// fields in message_request. The server distinguishes requests by their
// defined field and then handles them using corresponding methods.
oneof message_request {
// Find a proto file by the file name.
string file_by_filename = 3;
// Find the proto file that declares the given fully-qualified symbol name.
// This field should be a fully-qualified symbol name
// (e.g. <package>.<service>[.<method>] or <package>.<type>).
string file_containing_symbol = 4;
// Find the proto file which defines an extension extending the given
// message type with the given field number.
ExtensionRequest file_containing_extension = 5;
// Finds the tag numbers used by all known extensions of the given message
// type, and appends them to ExtensionNumberResponse in an undefined order.
// Its corresponding method is best-effort: it's not guaranteed that the
// reflection service will implement this method, and it's not guaranteed
// that this method will provide all extensions. Returns
// StatusCode::UNIMPLEMENTED if it's not implemented.
// This field should be a fully-qualified type name. The format is
// <package>.<type>
string all_extension_numbers_of_type = 6;
// List the full names of registered services. The content will not be
// checked.
string list_services = 7;
}
}
// The type name and extension number sent by the client when requesting
// file_containing_extension.
message ExtensionRequest {
// Fully-qualified type name. The format should be <package>.<type>
string containing_type = 1;
int32 extension_number = 2;
}
// The message sent by the server to answer ServerReflectionInfo method.
message ServerReflectionResponse {
string valid_host = 1;
ServerReflectionRequest original_request = 2;
// The server set one of the following fields accroding to the message_request
// in the request.
oneof message_response {
// This message is used to answer file_by_filename, file_containing_symbol,
// file_containing_extension requests with transitive dependencies. As
// the repeated label is not allowed in oneof fields, we use a
// FileDescriptorResponse message to encapsulate the repeated fields.
// The reflection service is allowed to avoid sending FileDescriptorProtos
// that were previously sent in response to earlier requests in the stream.
FileDescriptorResponse file_descriptor_response = 4;
// This message is used to answer all_extension_numbers_of_type requst.
ExtensionNumberResponse all_extension_numbers_response = 5;
// This message is used to answer list_services request.
ListServiceResponse list_services_response = 6;
// This message is used when an error occurs.
ErrorResponse error_response = 7;
}
}
// Serialized FileDescriptorProto messages sent by the server answering
// a file_by_filename, file_containing_symbol, or file_containing_extension
// request.
message FileDescriptorResponse {
// Serialized FileDescriptorProto messages. We avoid taking a dependency on
// descriptor.proto, which uses proto2 only features, by making them opaque
// bytes instead.
repeated bytes file_descriptor_proto = 1;
}
// A list of extension numbers sent by the server answering
// all_extension_numbers_of_type request.
message ExtensionNumberResponse {
// Full name of the base type, including the package name. The format
// is <package>.<type>
string base_type_name = 1;
repeated int32 extension_number = 2;
}
// A list of ServiceResponse sent by the server answering list_services request.
message ListServiceResponse {
// The information of each service may be expanded in the future, so we use
// ServiceResponse message to encapsulate it.
repeated ServiceResponse service = 1;
}
// The information of a single service used by ListServiceResponse to answer
// list_services request.
message ServiceResponse {
// Full name of a registered service, including its package name. The format
// is <package>.<service>
string name = 1;
}
// The error code and error message sent by the server when an error occurs.
message ErrorResponse {
// This field uses the error codes defined in grpc::StatusCode.
int32 error_code = 1;
string error_message = 2;
}

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syntax = "proto3";
package sample;
import 'vendor.proto';
service SampleService {
rpc Hello (HelloRequest) returns (HelloResponse) {}
rpc Hello2 (HelloRequest) returns (CommonMessage) {}
}
message HelloRequest {
string hello = 1;
HelloNested nested = 2;
ShadowedMessage nestedShadowedMessage = 3;
message HelloNested {
string hello = 1;
CommonMessage field = 2;
}
message ShadowedMessage {
int32 item = 1;
}
}
enum HelloStatus {
HELLO = 1;
WORLD = 2;
}
message HelloResponse {
string world = 1;
HelloStatus status = 2;
}
message ShadowedMessage {
string hello = 1;
}

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syntax = "proto2";
// NOTE: intentionally using the same 'vendor' package here to document the
// file/package merging behavior of the reflection service.
//
// this file should be combined with vendor.proto to a single definition because
// it's under the same 'vendor' package
package vendor;
message CommonMessage {
optional string common = 1;
optional DependentMessage dependency = 2;
extensions 100 to 199;
}

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@ -0,0 +1,7 @@
syntax = "proto2";
package vendor.dependency;
message DependentMessage {
optional string something = 1;
}

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@ -0,0 +1,10 @@
syntax = "proto2";
package vendor;
import "./common.proto";
import "./dependency/dependency.proto";
extend CommonMessage {
optional bool ext = 101;
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
/**
* The error code and error message sent by the server when an error occurs.
*/
export interface ErrorResponse {
/**
* This field uses the error codes defined in grpc::StatusCode.
*/
'errorCode'?: (number);
'errorMessage'?: (string);
}
/**
* The error code and error message sent by the server when an error occurs.
*/
export interface ErrorResponse__Output {
/**
* This field uses the error codes defined in grpc::StatusCode.
*/
'errorCode': (number);
'errorMessage': (string);
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
/**
* A list of extension numbers sent by the server answering
* all_extension_numbers_of_type request.
*/
export interface ExtensionNumberResponse {
/**
* Full name of the base type, including the package name. The format
* is <package>.<type>
*/
'baseTypeName'?: (string);
'extensionNumber'?: (number)[];
}
/**
* A list of extension numbers sent by the server answering
* all_extension_numbers_of_type request.
*/
export interface ExtensionNumberResponse__Output {
/**
* Full name of the base type, including the package name. The format
* is <package>.<type>
*/
'baseTypeName': (string);
'extensionNumber': (number)[];
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
/**
* The type name and extension number sent by the client when requesting
* file_containing_extension.
*/
export interface ExtensionRequest {
/**
* Fully-qualified type name. The format should be <package>.<type>
*/
'containingType'?: (string);
'extensionNumber'?: (number);
}
/**
* The type name and extension number sent by the client when requesting
* file_containing_extension.
*/
export interface ExtensionRequest__Output {
/**
* Fully-qualified type name. The format should be <package>.<type>
*/
'containingType': (string);
'extensionNumber': (number);
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
/**
* Serialized FileDescriptorProto messages sent by the server answering
* a file_by_filename, file_containing_symbol, or file_containing_extension
* request.
*/
export interface FileDescriptorResponse {
/**
* Serialized FileDescriptorProto messages. We avoid taking a dependency on
* descriptor.proto, which uses proto2 only features, by making them opaque
* bytes instead.
*/
'fileDescriptorProto'?: (Buffer | Uint8Array | string)[];
}
/**
* Serialized FileDescriptorProto messages sent by the server answering
* a file_by_filename, file_containing_symbol, or file_containing_extension
* request.
*/
export interface FileDescriptorResponse__Output {
/**
* Serialized FileDescriptorProto messages. We avoid taking a dependency on
* descriptor.proto, which uses proto2 only features, by making them opaque
* bytes instead.
*/
'fileDescriptorProto': (Uint8Array)[];
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
import type { ServiceResponse as _grpc_reflection_v1_ServiceResponse, ServiceResponse__Output as _grpc_reflection_v1_ServiceResponse__Output } from '../../../grpc/reflection/v1/ServiceResponse';
/**
* A list of ServiceResponse sent by the server answering list_services request.
*/
export interface ListServiceResponse {
/**
* The information of each service may be expanded in the future, so we use
* ServiceResponse message to encapsulate it.
*/
'service'?: (_grpc_reflection_v1_ServiceResponse)[];
}
/**
* A list of ServiceResponse sent by the server answering list_services request.
*/
export interface ListServiceResponse__Output {
/**
* The information of each service may be expanded in the future, so we use
* ServiceResponse message to encapsulate it.
*/
'service': (_grpc_reflection_v1_ServiceResponse__Output)[];
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
import type { MethodDefinition } from '@grpc/proto-loader'
import type { ServerReflectionRequest as _grpc_reflection_v1_ServerReflectionRequest, ServerReflectionRequest__Output as _grpc_reflection_v1_ServerReflectionRequest__Output } from '../../../grpc/reflection/v1/ServerReflectionRequest';
import type { ServerReflectionResponse as _grpc_reflection_v1_ServerReflectionResponse, ServerReflectionResponse__Output as _grpc_reflection_v1_ServerReflectionResponse__Output } from '../../../grpc/reflection/v1/ServerReflectionResponse';
export interface ServerReflectionDefinition {
ServerReflectionInfo: MethodDefinition<_grpc_reflection_v1_ServerReflectionRequest, _grpc_reflection_v1_ServerReflectionResponse, _grpc_reflection_v1_ServerReflectionRequest__Output, _grpc_reflection_v1_ServerReflectionResponse__Output>
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
import type { ExtensionRequest as _grpc_reflection_v1_ExtensionRequest, ExtensionRequest__Output as _grpc_reflection_v1_ExtensionRequest__Output } from '../../../grpc/reflection/v1/ExtensionRequest';
/**
* The message sent by the client when calling ServerReflectionInfo method.
*/
export interface ServerReflectionRequest {
'host'?: (string);
/**
* Find a proto file by the file name.
*/
'fileByFilename'?: (string);
/**
* Find the proto file that declares the given fully-qualified symbol name.
* This field should be a fully-qualified symbol name
* (e.g. <package>.<service>[.<method>] or <package>.<type>).
*/
'fileContainingSymbol'?: (string);
/**
* Find the proto file which defines an extension extending the given
* message type with the given field number.
*/
'fileContainingExtension'?: (_grpc_reflection_v1_ExtensionRequest | null);
/**
* Finds the tag numbers used by all known extensions of the given message
* type, and appends them to ExtensionNumberResponse in an undefined order.
* Its corresponding method is best-effort: it's not guaranteed that the
* reflection service will implement this method, and it's not guaranteed
* that this method will provide all extensions. Returns
* StatusCode::UNIMPLEMENTED if it's not implemented.
* This field should be a fully-qualified type name. The format is
* <package>.<type>
*/
'allExtensionNumbersOfType'?: (string);
/**
* List the full names of registered services. The content will not be
* checked.
*/
'listServices'?: (string);
/**
* To use reflection service, the client should set one of the following
* fields in message_request. The server distinguishes requests by their
* defined field and then handles them using corresponding methods.
*/
'messageRequest'?: "fileByFilename"|"fileContainingSymbol"|"fileContainingExtension"|"allExtensionNumbersOfType"|"listServices";
}
/**
* The message sent by the client when calling ServerReflectionInfo method.
*/
export interface ServerReflectionRequest__Output {
'host': (string);
/**
* Find a proto file by the file name.
*/
'fileByFilename'?: (string);
/**
* Find the proto file that declares the given fully-qualified symbol name.
* This field should be a fully-qualified symbol name
* (e.g. <package>.<service>[.<method>] or <package>.<type>).
*/
'fileContainingSymbol'?: (string);
/**
* Find the proto file which defines an extension extending the given
* message type with the given field number.
*/
'fileContainingExtension'?: (_grpc_reflection_v1_ExtensionRequest__Output | null);
/**
* Finds the tag numbers used by all known extensions of the given message
* type, and appends them to ExtensionNumberResponse in an undefined order.
* Its corresponding method is best-effort: it's not guaranteed that the
* reflection service will implement this method, and it's not guaranteed
* that this method will provide all extensions. Returns
* StatusCode::UNIMPLEMENTED if it's not implemented.
* This field should be a fully-qualified type name. The format is
* <package>.<type>
*/
'allExtensionNumbersOfType'?: (string);
/**
* List the full names of registered services. The content will not be
* checked.
*/
'listServices'?: (string);
/**
* To use reflection service, the client should set one of the following
* fields in message_request. The server distinguishes requests by their
* defined field and then handles them using corresponding methods.
*/
'messageRequest': "fileByFilename"|"fileContainingSymbol"|"fileContainingExtension"|"allExtensionNumbersOfType"|"listServices";
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
import type { ServerReflectionRequest as _grpc_reflection_v1_ServerReflectionRequest, ServerReflectionRequest__Output as _grpc_reflection_v1_ServerReflectionRequest__Output } from '../../../grpc/reflection/v1/ServerReflectionRequest';
import type { FileDescriptorResponse as _grpc_reflection_v1_FileDescriptorResponse, FileDescriptorResponse__Output as _grpc_reflection_v1_FileDescriptorResponse__Output } from '../../../grpc/reflection/v1/FileDescriptorResponse';
import type { ExtensionNumberResponse as _grpc_reflection_v1_ExtensionNumberResponse, ExtensionNumberResponse__Output as _grpc_reflection_v1_ExtensionNumberResponse__Output } from '../../../grpc/reflection/v1/ExtensionNumberResponse';
import type { ListServiceResponse as _grpc_reflection_v1_ListServiceResponse, ListServiceResponse__Output as _grpc_reflection_v1_ListServiceResponse__Output } from '../../../grpc/reflection/v1/ListServiceResponse';
import type { ErrorResponse as _grpc_reflection_v1_ErrorResponse, ErrorResponse__Output as _grpc_reflection_v1_ErrorResponse__Output } from '../../../grpc/reflection/v1/ErrorResponse';
/**
* The message sent by the server to answer ServerReflectionInfo method.
*/
export interface ServerReflectionResponse {
'validHost'?: (string);
'originalRequest'?: (_grpc_reflection_v1_ServerReflectionRequest | null);
/**
* This message is used to answer file_by_filename, file_containing_symbol,
* file_containing_extension requests with transitive dependencies.
* As the repeated label is not allowed in oneof fields, we use a
* FileDescriptorResponse message to encapsulate the repeated fields.
* The reflection service is allowed to avoid sending FileDescriptorProtos
* that were previously sent in response to earlier requests in the stream.
*/
'fileDescriptorResponse'?: (_grpc_reflection_v1_FileDescriptorResponse | null);
/**
* This message is used to answer all_extension_numbers_of_type requests.
*/
'allExtensionNumbersResponse'?: (_grpc_reflection_v1_ExtensionNumberResponse | null);
/**
* This message is used to answer list_services requests.
*/
'listServicesResponse'?: (_grpc_reflection_v1_ListServiceResponse | null);
/**
* This message is used when an error occurs.
*/
'errorResponse'?: (_grpc_reflection_v1_ErrorResponse | null);
/**
* The server sets one of the following fields according to the message_request
* in the request.
*/
'messageResponse'?: "fileDescriptorResponse"|"allExtensionNumbersResponse"|"listServicesResponse"|"errorResponse";
}
/**
* The message sent by the server to answer ServerReflectionInfo method.
*/
export interface ServerReflectionResponse__Output {
'validHost': (string);
'originalRequest': (_grpc_reflection_v1_ServerReflectionRequest__Output | null);
/**
* This message is used to answer file_by_filename, file_containing_symbol,
* file_containing_extension requests with transitive dependencies.
* As the repeated label is not allowed in oneof fields, we use a
* FileDescriptorResponse message to encapsulate the repeated fields.
* The reflection service is allowed to avoid sending FileDescriptorProtos
* that were previously sent in response to earlier requests in the stream.
*/
'fileDescriptorResponse'?: (_grpc_reflection_v1_FileDescriptorResponse__Output | null);
/**
* This message is used to answer all_extension_numbers_of_type requests.
*/
'allExtensionNumbersResponse'?: (_grpc_reflection_v1_ExtensionNumberResponse__Output | null);
/**
* This message is used to answer list_services requests.
*/
'listServicesResponse'?: (_grpc_reflection_v1_ListServiceResponse__Output | null);
/**
* This message is used when an error occurs.
*/
'errorResponse'?: (_grpc_reflection_v1_ErrorResponse__Output | null);
/**
* The server sets one of the following fields according to the message_request
* in the request.
*/
'messageResponse': "fileDescriptorResponse"|"allExtensionNumbersResponse"|"listServicesResponse"|"errorResponse";
}

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// Original file: proto/grpc/reflection/v1/reflection.proto
/**
* The information of a single service used by ListServiceResponse to answer
* list_services request.
*/
export interface ServiceResponse {
/**
* Full name of a registered service, including its package name. The format
* is <package>.<service>
*/
'name'?: (string);
}
/**
* The information of a single service used by ListServiceResponse to answer
* list_services request.
*/
export interface ServiceResponse__Output {
/**
* Full name of a registered service, including its package name. The format
* is <package>.<service>
*/
'name': (string);
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
/**
* The error code and error message sent by the server when an error occurs.
*/
export interface ErrorResponse {
/**
* This field uses the error codes defined in grpc::StatusCode.
*/
'errorCode'?: (number);
'errorMessage'?: (string);
}
/**
* The error code and error message sent by the server when an error occurs.
*/
export interface ErrorResponse__Output {
/**
* This field uses the error codes defined in grpc::StatusCode.
*/
'errorCode': (number);
'errorMessage': (string);
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
/**
* A list of extension numbers sent by the server answering
* all_extension_numbers_of_type request.
*/
export interface ExtensionNumberResponse {
/**
* Full name of the base type, including the package name. The format
* is <package>.<type>
*/
'baseTypeName'?: (string);
'extensionNumber'?: (number)[];
}
/**
* A list of extension numbers sent by the server answering
* all_extension_numbers_of_type request.
*/
export interface ExtensionNumberResponse__Output {
/**
* Full name of the base type, including the package name. The format
* is <package>.<type>
*/
'baseTypeName': (string);
'extensionNumber': (number)[];
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
/**
* The type name and extension number sent by the client when requesting
* file_containing_extension.
*/
export interface ExtensionRequest {
/**
* Fully-qualified type name. The format should be <package>.<type>
*/
'containingType'?: (string);
'extensionNumber'?: (number);
}
/**
* The type name and extension number sent by the client when requesting
* file_containing_extension.
*/
export interface ExtensionRequest__Output {
/**
* Fully-qualified type name. The format should be <package>.<type>
*/
'containingType': (string);
'extensionNumber': (number);
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
/**
* Serialized FileDescriptorProto messages sent by the server answering
* a file_by_filename, file_containing_symbol, or file_containing_extension
* request.
*/
export interface FileDescriptorResponse {
/**
* Serialized FileDescriptorProto messages. We avoid taking a dependency on
* descriptor.proto, which uses proto2 only features, by making them opaque
* bytes instead.
*/
'fileDescriptorProto'?: (Buffer | Uint8Array | string)[];
}
/**
* Serialized FileDescriptorProto messages sent by the server answering
* a file_by_filename, file_containing_symbol, or file_containing_extension
* request.
*/
export interface FileDescriptorResponse__Output {
/**
* Serialized FileDescriptorProto messages. We avoid taking a dependency on
* descriptor.proto, which uses proto2 only features, by making them opaque
* bytes instead.
*/
'fileDescriptorProto': (Uint8Array)[];
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
import type { ServiceResponse as _grpc_reflection_v1alpha_ServiceResponse, ServiceResponse__Output as _grpc_reflection_v1alpha_ServiceResponse__Output } from '../../../grpc/reflection/v1alpha/ServiceResponse';
/**
* A list of ServiceResponse sent by the server answering list_services request.
*/
export interface ListServiceResponse {
/**
* The information of each service may be expanded in the future, so we use
* ServiceResponse message to encapsulate it.
*/
'service'?: (_grpc_reflection_v1alpha_ServiceResponse)[];
}
/**
* A list of ServiceResponse sent by the server answering list_services request.
*/
export interface ListServiceResponse__Output {
/**
* The information of each service may be expanded in the future, so we use
* ServiceResponse message to encapsulate it.
*/
'service': (_grpc_reflection_v1alpha_ServiceResponse__Output)[];
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
import type { MethodDefinition } from '@grpc/proto-loader'
import type { ServerReflectionRequest as _grpc_reflection_v1alpha_ServerReflectionRequest, ServerReflectionRequest__Output as _grpc_reflection_v1alpha_ServerReflectionRequest__Output } from '../../../grpc/reflection/v1alpha/ServerReflectionRequest';
import type { ServerReflectionResponse as _grpc_reflection_v1alpha_ServerReflectionResponse, ServerReflectionResponse__Output as _grpc_reflection_v1alpha_ServerReflectionResponse__Output } from '../../../grpc/reflection/v1alpha/ServerReflectionResponse';
export interface ServerReflectionDefinition {
ServerReflectionInfo: MethodDefinition<_grpc_reflection_v1alpha_ServerReflectionRequest, _grpc_reflection_v1alpha_ServerReflectionResponse, _grpc_reflection_v1alpha_ServerReflectionRequest__Output, _grpc_reflection_v1alpha_ServerReflectionResponse__Output>
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
import type { ExtensionRequest as _grpc_reflection_v1alpha_ExtensionRequest, ExtensionRequest__Output as _grpc_reflection_v1alpha_ExtensionRequest__Output } from '../../../grpc/reflection/v1alpha/ExtensionRequest';
/**
* The message sent by the client when calling ServerReflectionInfo method.
*/
export interface ServerReflectionRequest {
'host'?: (string);
/**
* Find a proto file by the file name.
*/
'fileByFilename'?: (string);
/**
* Find the proto file that declares the given fully-qualified symbol name.
* This field should be a fully-qualified symbol name
* (e.g. <package>.<service>[.<method>] or <package>.<type>).
*/
'fileContainingSymbol'?: (string);
/**
* Find the proto file which defines an extension extending the given
* message type with the given field number.
*/
'fileContainingExtension'?: (_grpc_reflection_v1alpha_ExtensionRequest | null);
/**
* Finds the tag numbers used by all known extensions of the given message
* type, and appends them to ExtensionNumberResponse in an undefined order.
* Its corresponding method is best-effort: it's not guaranteed that the
* reflection service will implement this method, and it's not guaranteed
* that this method will provide all extensions. Returns
* StatusCode::UNIMPLEMENTED if it's not implemented.
* This field should be a fully-qualified type name. The format is
* <package>.<type>
*/
'allExtensionNumbersOfType'?: (string);
/**
* List the full names of registered services. The content will not be
* checked.
*/
'listServices'?: (string);
/**
* To use reflection service, the client should set one of the following
* fields in message_request. The server distinguishes requests by their
* defined field and then handles them using corresponding methods.
*/
'messageRequest'?: "fileByFilename"|"fileContainingSymbol"|"fileContainingExtension"|"allExtensionNumbersOfType"|"listServices";
}
/**
* The message sent by the client when calling ServerReflectionInfo method.
*/
export interface ServerReflectionRequest__Output {
'host': (string);
/**
* Find a proto file by the file name.
*/
'fileByFilename'?: (string);
/**
* Find the proto file that declares the given fully-qualified symbol name.
* This field should be a fully-qualified symbol name
* (e.g. <package>.<service>[.<method>] or <package>.<type>).
*/
'fileContainingSymbol'?: (string);
/**
* Find the proto file which defines an extension extending the given
* message type with the given field number.
*/
'fileContainingExtension'?: (_grpc_reflection_v1alpha_ExtensionRequest__Output | null);
/**
* Finds the tag numbers used by all known extensions of the given message
* type, and appends them to ExtensionNumberResponse in an undefined order.
* Its corresponding method is best-effort: it's not guaranteed that the
* reflection service will implement this method, and it's not guaranteed
* that this method will provide all extensions. Returns
* StatusCode::UNIMPLEMENTED if it's not implemented.
* This field should be a fully-qualified type name. The format is
* <package>.<type>
*/
'allExtensionNumbersOfType'?: (string);
/**
* List the full names of registered services. The content will not be
* checked.
*/
'listServices'?: (string);
/**
* To use reflection service, the client should set one of the following
* fields in message_request. The server distinguishes requests by their
* defined field and then handles them using corresponding methods.
*/
'messageRequest': "fileByFilename"|"fileContainingSymbol"|"fileContainingExtension"|"allExtensionNumbersOfType"|"listServices";
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
import type { ServerReflectionRequest as _grpc_reflection_v1alpha_ServerReflectionRequest, ServerReflectionRequest__Output as _grpc_reflection_v1alpha_ServerReflectionRequest__Output } from '../../../grpc/reflection/v1alpha/ServerReflectionRequest';
import type { FileDescriptorResponse as _grpc_reflection_v1alpha_FileDescriptorResponse, FileDescriptorResponse__Output as _grpc_reflection_v1alpha_FileDescriptorResponse__Output } from '../../../grpc/reflection/v1alpha/FileDescriptorResponse';
import type { ExtensionNumberResponse as _grpc_reflection_v1alpha_ExtensionNumberResponse, ExtensionNumberResponse__Output as _grpc_reflection_v1alpha_ExtensionNumberResponse__Output } from '../../../grpc/reflection/v1alpha/ExtensionNumberResponse';
import type { ListServiceResponse as _grpc_reflection_v1alpha_ListServiceResponse, ListServiceResponse__Output as _grpc_reflection_v1alpha_ListServiceResponse__Output } from '../../../grpc/reflection/v1alpha/ListServiceResponse';
import type { ErrorResponse as _grpc_reflection_v1alpha_ErrorResponse, ErrorResponse__Output as _grpc_reflection_v1alpha_ErrorResponse__Output } from '../../../grpc/reflection/v1alpha/ErrorResponse';
/**
* The message sent by the server to answer ServerReflectionInfo method.
*/
export interface ServerReflectionResponse {
'validHost'?: (string);
'originalRequest'?: (_grpc_reflection_v1alpha_ServerReflectionRequest | null);
/**
* This message is used to answer file_by_filename, file_containing_symbol,
* file_containing_extension requests with transitive dependencies. As
* the repeated label is not allowed in oneof fields, we use a
* FileDescriptorResponse message to encapsulate the repeated fields.
* The reflection service is allowed to avoid sending FileDescriptorProtos
* that were previously sent in response to earlier requests in the stream.
*/
'fileDescriptorResponse'?: (_grpc_reflection_v1alpha_FileDescriptorResponse | null);
/**
* This message is used to answer all_extension_numbers_of_type requst.
*/
'allExtensionNumbersResponse'?: (_grpc_reflection_v1alpha_ExtensionNumberResponse | null);
/**
* This message is used to answer list_services request.
*/
'listServicesResponse'?: (_grpc_reflection_v1alpha_ListServiceResponse | null);
/**
* This message is used when an error occurs.
*/
'errorResponse'?: (_grpc_reflection_v1alpha_ErrorResponse | null);
/**
* The server set one of the following fields accroding to the message_request
* in the request.
*/
'messageResponse'?: "fileDescriptorResponse"|"allExtensionNumbersResponse"|"listServicesResponse"|"errorResponse";
}
/**
* The message sent by the server to answer ServerReflectionInfo method.
*/
export interface ServerReflectionResponse__Output {
'validHost': (string);
'originalRequest': (_grpc_reflection_v1alpha_ServerReflectionRequest__Output | null);
/**
* This message is used to answer file_by_filename, file_containing_symbol,
* file_containing_extension requests with transitive dependencies. As
* the repeated label is not allowed in oneof fields, we use a
* FileDescriptorResponse message to encapsulate the repeated fields.
* The reflection service is allowed to avoid sending FileDescriptorProtos
* that were previously sent in response to earlier requests in the stream.
*/
'fileDescriptorResponse'?: (_grpc_reflection_v1alpha_FileDescriptorResponse__Output | null);
/**
* This message is used to answer all_extension_numbers_of_type requst.
*/
'allExtensionNumbersResponse'?: (_grpc_reflection_v1alpha_ExtensionNumberResponse__Output | null);
/**
* This message is used to answer list_services request.
*/
'listServicesResponse'?: (_grpc_reflection_v1alpha_ListServiceResponse__Output | null);
/**
* This message is used when an error occurs.
*/
'errorResponse'?: (_grpc_reflection_v1alpha_ErrorResponse__Output | null);
/**
* The server set one of the following fields accroding to the message_request
* in the request.
*/
'messageResponse': "fileDescriptorResponse"|"allExtensionNumbersResponse"|"listServicesResponse"|"errorResponse";
}

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// Original file: proto/grpc/reflection/v1alpha/reflection.proto
/**
* The information of a single service used by ListServiceResponse to answer
* list_services request.
*/
export interface ServiceResponse {
/**
* Full name of a registered service, including its package name. The format
* is <package>.<service>
*/
'name'?: (string);
}
/**
* The information of a single service used by ListServiceResponse to answer
* list_services request.
*/
export interface ServiceResponse__Output {
/**
* Full name of a registered service, including its package name. The format
* is <package>.<service>
*/
'name': (string);
}

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import {
DescriptorProto,
EnumDescriptorProto,
EnumValueDescriptorProto,
FieldDescriptorProto,
FileDescriptorProto,
MethodDescriptorProto,
OneofDescriptorProto,
ServiceDescriptorProto,
} from 'google-protobuf/google/protobuf/descriptor_pb';
/** A set of functions for operating on protobuf objects as we visit them in a traversal */
interface Visitor {
field?: (fqn: string, file: FileDescriptorProto, field: FieldDescriptorProto) => void;
extension?: (fqn: string, file: FileDescriptorProto, extension: FieldDescriptorProto) => void;
oneOf?: (fqn: string, file: FileDescriptorProto, decl: OneofDescriptorProto) => void;
message?: (fqn: string, file: FileDescriptorProto, msg: DescriptorProto) => void;
enum?: (fqn: string, file: FileDescriptorProto, msg: EnumDescriptorProto) => void;
enumValue?: (fqn: string, file: FileDescriptorProto, msg: EnumValueDescriptorProto) => void;
service?: (fqn: string, file: FileDescriptorProto, msg: ServiceDescriptorProto) => void;
method?: (fqn: string, file: FileDescriptorProto, method: MethodDescriptorProto) => void;
}
/** Visit each node in a protobuf file and perform an operation on it
*
* This is useful because protocol buffers has nested objects so if we need to
* traverse them multiple times then we don't want to duplicate that traversal
* logic
*
* @see Visitor for the interface to interact with the nodes
*/
export const visit = (file: FileDescriptorProto, visitor: Visitor): void => {
const processField = (prefix: string, file: FileDescriptorProto, field: FieldDescriptorProto) => {
const fqn = `${prefix}.${field.getName()}`;
if (visitor.field) {
visitor.field(fqn, file, field);
}
};
const processExtension = (
prefix: string,
file: FileDescriptorProto,
ext: FieldDescriptorProto,
) => {
const fqn = `${prefix}.${ext.getName()}`;
if (visitor.extension) {
visitor.extension(fqn, file, ext);
}
};
const processOneOf = (prefix: string, file: FileDescriptorProto, decl: OneofDescriptorProto) => {
const fqn = `${prefix}.${decl.getName()}`;
if (visitor.oneOf) {
visitor.oneOf(fqn, file, decl);
}
};
const processEnum = (prefix: string, file: FileDescriptorProto, decl: EnumDescriptorProto) => {
const fqn = `${prefix}.${decl.getName()}`;
if (visitor.enum) {
visitor.enum(fqn, file, decl);
}
decl.getValueList().forEach((value) => {
const valueFqn = `${fqn}.${value.getName()}`;
if (visitor.enumValue) {
visitor.enumValue(valueFqn, file, value);
}
});
};
const processMessage = (prefix: string, file: FileDescriptorProto, msg: DescriptorProto) => {
const fqn = `${prefix}.${msg.getName()}`;
if (visitor.message) {
visitor.message(fqn, file, msg);
}
msg.getNestedTypeList().forEach((type) => processMessage(fqn, file, type));
msg.getEnumTypeList().forEach((type) => processEnum(fqn, file, type));
msg.getFieldList().forEach((field) => processField(fqn, file, field));
msg.getOneofDeclList().forEach((decl) => processOneOf(fqn, file, decl));
msg.getExtensionList().forEach((ext) => processExtension(fqn, file, ext));
};
const processService = (
prefix: string,
file: FileDescriptorProto,
service: ServiceDescriptorProto,
) => {
const fqn = `${prefix}.${service.getName()}`;
if (visitor.service) {
visitor.service(fqn, file, service);
}
service.getMethodList().forEach((method) => {
const methodFqn = `${fqn}.${method.getName()}`;
if (visitor.method) {
visitor.method(methodFqn, file, method);
}
});
};
const packageName = file.getPackage();
file.getEnumTypeList().forEach((type) => processEnum(packageName, file, type));
file.getMessageTypeList().forEach((type) => processMessage(packageName, file, type));
file.getServiceList().forEach((service) => processService(packageName, file, service));
file.getExtensionList().forEach((ext) => processExtension(packageName, file, ext));
};

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import {
FileDescriptorProto,
FileDescriptorSet,
} from 'google-protobuf/google/protobuf/descriptor_pb';
import * as grpc from '@grpc/grpc-js';
import * as protoLoader from '@grpc/proto-loader';
import { ExtensionNumberResponse__Output } from './generated/grpc/reflection/v1/ExtensionNumberResponse';
import { FileDescriptorResponse__Output } from './generated/grpc/reflection/v1/FileDescriptorResponse';
import { ListServiceResponse__Output } from './generated/grpc/reflection/v1/ListServiceResponse';
import { visit } from './protobuf-visitor';
import { scope } from './utils';
export class ReflectionError extends Error {
constructor(
readonly statusCode: grpc.status,
readonly message: string,
) {
super(message);
}
}
/** Analyzes a gRPC server and exposes methods to reflect on it
*
* NOTE: the files returned by this service may not match the handwritten ones 1:1.
* This is because proto-loader reorients files based on their package definition,
* combining any that have the same package.
*
* For example: if files 'a.proto' and 'b.proto' are both for the same package 'c' then
* we will always return a reference to a combined 'c.proto' instead of the 2 files.
*/
export class ReflectionV1Implementation {
/** The full list of proto files (including imported deps) that the gRPC server includes */
private fileDescriptorSet = new FileDescriptorSet();
/** An index of proto files by file name (eg. 'sample.proto') */
private fileNameIndex: Record<string, FileDescriptorProto> = {};
/** An index of proto files by type extension relationship
*
* extensionIndex[<pkg>.<msg>][<field#>] contains a reference to the file containing an
* extension for the type "<pkg>.<msg>" and field number "<field#>"
*/
private extensionIndex: Record<string, Record<number, FileDescriptorProto>> = {};
/** An index of fully qualified symbol names (eg. 'sample.Message') to the files that contain them */
private symbolMap: Record<string, FileDescriptorProto> = {};
constructor(root: protoLoader.PackageDefinition) {
Object.values(root).forEach(({ fileDescriptorProtos }) => {
// Add file descriptors to the FileDescriptorSet.
// We use the Array check here because a ServiceDefinition could have a method named the same thing
if (Array.isArray(fileDescriptorProtos)) {
fileDescriptorProtos.forEach((bin) => {
const proto = FileDescriptorProto.deserializeBinary(bin);
const isFileInSet = this.fileDescriptorSet
.getFileList()
.map((f) => f.getName())
.includes(proto.getName());
if (!isFileInSet) {
this.fileDescriptorSet.addFile(proto);
}
});
}
});
this.fileNameIndex = Object.fromEntries(
this.fileDescriptorSet.getFileList().map((f) => [f.getName(), f]),
);
// Pass 1: Index Values
const index = (fqn: string, file: FileDescriptorProto) => (this.symbolMap[fqn] = file);
this.fileDescriptorSet.getFileList().forEach((file) =>
visit(file, {
field: index,
oneOf: index,
message: index,
service: index,
method: index,
enum: index,
enumValue: index,
extension: (fqn, file, ext) => {
index(fqn, file);
const extendeeName = ext.getExtendee();
this.extensionIndex[extendeeName] = {
...(this.extensionIndex[extendeeName] || {}),
[ext.getNumber()]: file,
};
},
}),
);
// Pass 2: Link References To Values
const addReference = (ref: string, sourceFile: FileDescriptorProto, pkgScope: string) => {
if (!ref) {
return; // nothing to do
}
let referencedFile: FileDescriptorProto | null = null;
if (ref.startsWith('.')) {
// absolute reference -- just remove the leading '.' and use the ref directly
referencedFile = this.symbolMap[ref.replace(/^\./, '')];
} else {
// relative reference -- need to seek upwards up the current package scope until we find it
let pkg = pkgScope;
while (pkg && !referencedFile) {
referencedFile = this.symbolMap[`${pkg}.${ref}`];
pkg = scope(pkg);
}
// if we didn't find anything then try just a FQN lookup
if (!referencedFile) {
referencedFile = this.symbolMap[ref];
}
}
if (!referencedFile) {
console.warn(`Could not find file associated with reference ${ref}`);
return;
}
if (referencedFile !== sourceFile) {
sourceFile.addDependency(referencedFile.getName());
}
};
this.fileDescriptorSet.getFileList().forEach((file) =>
visit(file, {
field: (fqn, file, field) => addReference(field.getTypeName(), file, scope(fqn)),
extension: (fqn, file, ext) => addReference(ext.getTypeName(), file, scope(fqn)),
method: (fqn, file, method) => {
addReference(method.getInputType(), file, scope(fqn));
addReference(method.getOutputType(), file, scope(fqn));
},
}),
);
}
/** List the full names of registered gRPC services
*
* note: the spec is unclear as to what the 'listServices' param can be; most
* clients seem to only pass '*' but unsure if this should behave like a
* filter. Until we know how this should behave with different inputs this
* just always returns *all* services.
*
* @returns full-qualified service names (eg. 'sample.SampleService')
*/
listServices(listServices: string): ListServiceResponse__Output {
const services = this.fileDescriptorSet
.getFileList()
.map((file) =>
file.getServiceList().map((service) => `${file.getPackage()}.${service.getName()}`),
)
.flat();
return { service: services.map((service) => ({ name: service })) };
}
/** Find the proto file(s) that declares the given fully-qualified symbol name
*
* @param symbol fully-qualified name of the symbol to lookup
* (e.g. package.service[.method] or package.type)
*
* @returns descriptors of the file which contains this symbol and its imports
*/
fileContainingSymbol(symbol: string): FileDescriptorResponse__Output {
const file = this.symbolMap[symbol];
if (!file) {
throw new ReflectionError(grpc.status.NOT_FOUND, `Symbol not found: ${symbol}`);
}
const deps = this.getFileDependencies(file);
return {
fileDescriptorProto: [file, ...deps].map((proto) => proto.serializeBinary()),
};
}
/** Find a proto file by the file name
*
* @returns descriptors of the file which contains this symbol and its imports
*/
fileByFilename(filename: string): FileDescriptorResponse__Output {
const file = this.fileNameIndex[filename];
if (!file) {
throw new ReflectionError(grpc.status.NOT_FOUND, `Proto file not found: ${filename}`);
}
const deps = this.getFileDependencies(file);
return {
fileDescriptorProto: [file, ...deps].map((f) => f.serializeBinary()),
};
}
/** Find a proto file containing an extension to a message type
*
* @returns descriptors of the file which contains this symbol and its imports
*/
fileContainingExtension(symbol: string, field: number): FileDescriptorResponse__Output {
const extensionsByFieldNumber = this.extensionIndex[symbol] || {};
const file = extensionsByFieldNumber[field];
if (!file) {
throw new ReflectionError(
grpc.status.NOT_FOUND,
`Extension not found for symbol ${symbol} at field ${field}`,
);
}
const deps = this.getFileDependencies(file);
return {
fileDescriptorProto: [file, ...deps].map((f) => f.serializeBinary()),
};
}
allExtensionNumbersOfType(symbol: string): ExtensionNumberResponse__Output {
if (!(symbol in this.extensionIndex)) {
throw new ReflectionError(grpc.status.NOT_FOUND, `Extensions not found for symbol ${symbol}`);
}
const fieldNumbers = Object.keys(this.extensionIndex[symbol]).map((key) => Number(key));
return {
baseTypeName: symbol,
extensionNumber: fieldNumbers,
};
}
private getFileDependencies(
file: FileDescriptorProto,
visited: Set<FileDescriptorProto> = new Set(),
): FileDescriptorProto[] {
const newVisited = visited.add(file);
const directDeps = file.getDependencyList().map((dep) => this.fileNameIndex[dep]);
const transitiveDeps = directDeps
.filter((dep) => !newVisited.has(dep))
.map((dep) => this.getFileDependencies(dep, newVisited))
.flat();
const allDeps = [...directDeps, ...transitiveDeps];
return [...new Set(allDeps)];
}
}

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/** Gets the package scope for a type name
*
* @example scope('grpc.reflection.v1.Type') == 'grpc.reflection.v1'
*/
export const scope = (path: string, separator: string = '.') => {
if (!path.includes(separator)) {
return '';
}
return path.split(separator).slice(0, -1).join(separator);
};

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import * as assert from 'assert';
import * as path from 'path';
import { FileDescriptorProto } from 'google-protobuf/google/protobuf/descriptor_pb';
import * as protoLoader from '@grpc/proto-loader';
import { ReflectionV1Implementation } from '../src/reflection-v1-implementation';
describe('GrpcReflectionService', () => {
let reflectionService: ReflectionV1Implementation;
beforeEach(async () => {
console.log(path.join(__dirname, '../proto/sample/sample.proto'));
console.log([path.join(__dirname, '../proto/sample/vendor')]);
const root = protoLoader.loadSync(path.join(__dirname, '../proto/sample/sample.proto'), {
includeDirs: [path.join(__dirname, '../proto/sample/vendor')]
});
reflectionService = new ReflectionV1Implementation(root);
});
describe('listServices()', () => {
it('lists all services', () => {
const { service: services } = reflectionService.listServices('*');
assert.equal(services.length, 1);
assert(services.find((s) => s.name === 'sample.SampleService'));
});
});
describe('fileByFilename()', () => {
it('finds files with transitive dependencies', () => {
const descriptors = reflectionService
.fileByFilename('sample.proto')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert.deepEqual(
new Set(names),
new Set(['sample.proto', 'vendor.proto', 'vendor_dependency.proto'])
);
});
it('finds files with fewer transitive dependencies', () => {
const descriptors = reflectionService
.fileByFilename('vendor.proto')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert.deepEqual(new Set(names), new Set(['vendor.proto', 'vendor_dependency.proto']));
});
it('finds files with no transitive dependencies', () => {
const descriptors = reflectionService
.fileByFilename('vendor_dependency.proto')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
assert.equal(descriptors.length, 1);
assert.equal(descriptors[0].getName(), 'vendor_dependency.proto');
});
it('merges files based on package name', () => {
const descriptors = reflectionService
.fileByFilename('vendor.proto')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert(!names.includes('common.proto')); // file merged into vendor.proto
});
it('errors with no file found', () => {
assert.throws(
() => reflectionService.fileByFilename('nonexistent.proto'),
'Proto file not found',
);
});
});
describe('fileContainingSymbol()', () => {
it('finds symbols and returns transitive file dependencies', () => {
const descriptors = reflectionService
.fileContainingSymbol('sample.HelloRequest')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert.deepEqual(
new Set(names),
new Set(['sample.proto', 'vendor.proto', 'vendor_dependency.proto']),
);
});
it('finds imported message types', () => {
const descriptors = reflectionService
.fileContainingSymbol('vendor.CommonMessage')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert.deepEqual(new Set(names), new Set(['vendor.proto', 'vendor_dependency.proto']));
});
it('finds transitively imported message types', () => {
const descriptors = reflectionService
.fileContainingSymbol('vendor.dependency.DependentMessage')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
assert.equal(descriptors.length, 1);
assert.equal(descriptors[0].getName(), 'vendor_dependency.proto');
});
it('finds nested message types', () => {
const descriptors = reflectionService
.fileContainingSymbol('sample.HelloRequest.HelloNested')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert.deepEqual(
new Set(names),
new Set(['sample.proto', 'vendor.proto', 'vendor_dependency.proto']),
);
});
it('merges files based on package name', () => {
const descriptors = reflectionService
.fileContainingSymbol('vendor.CommonMessage')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert(!names.includes('common.proto')); // file merged into vendor.proto
});
it('errors with no symbol found', () => {
assert.throws(
() => reflectionService.fileContainingSymbol('non.existant.symbol'),
'Symbol not found:',
);
});
it('resolves references to method types', () => {
const descriptors = reflectionService
.fileContainingSymbol('sample.SampleService.Hello2')
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert.deepEqual(
new Set(names),
new Set(['sample.proto', 'vendor.proto', 'vendor_dependency.proto']),
);
});
});
describe('fileContainingExtension()', () => {
it('finds extensions and returns transitive file dependencies', () => {
const descriptors = reflectionService
.fileContainingExtension('.vendor.CommonMessage', 101)
.fileDescriptorProto.map(FileDescriptorProto.deserializeBinary);
const names = descriptors.map((desc) => desc.getName());
assert.deepEqual(new Set(names), new Set(['vendor.proto', 'vendor_dependency.proto']));
});
it('errors with no symbol found', () => {
assert.throws(
() => reflectionService.fileContainingExtension('non.existant.symbol', 0),
'Extension not found',
);
});
});
describe('allExtensionNumbersOfType()', () => {
it('finds extensions and returns transitive file dependencies', () => {
const response = reflectionService.allExtensionNumbersOfType('.vendor.CommonMessage');
assert.equal(response.extensionNumber.length, 1);
assert.equal(response.extensionNumber[0], 101);
});
it('errors with no symbol found', () => {
assert.throws(
() => reflectionService.allExtensionNumbersOfType('non.existant.symbol'),
'Extensions not found',
);
});
});
});

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import * as assert from 'assert';
import { scope } from '../src/utils';
describe('scope', () => {
it('traverses upwards in the package scope', () => {
assert.strictEqual(scope('grpc.health.v1.HealthCheckResponse.ServiceStatus'), 'grpc.health.v1.HealthCheckResponse');
assert.strictEqual(scope(scope(scope(scope('grpc.health.v1.HealthCheckResponse.ServiceStatus')))), 'grpc');
});
it('returns an empty package when at the top', () => {
assert.strictEqual(scope('Message'), '');
assert.strictEqual(scope(''), '');
});
});

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{
"compilerOptions": {
"allowUnreachableCode": false,
"allowUnusedLabels": false,
"declaration": true,
"forceConsistentCasingInFileNames": true,
"noEmitOnError": true,
"noFallthroughCasesInSwitch": true,
"noImplicitReturns": true,
"pretty": true,
"sourceMap": true,
"strictNullChecks": false,
"lib": ["es2017"],
"outDir": "build",
"target": "es2017",
"module": "commonjs",
"resolveJsonModule": true,
"incremental": true,
"types": ["mocha"],
"noUnusedLocals": true
},
"include": [
"src/**/*.ts",
"test/**/*.ts"
],
"exclude": [
"node_modules"
]
}