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authoraltaf-creator <dev@altafcreator.com>2025-11-16 19:08:29 +0800
committeraltaf-creator <dev@altafcreator.com>2025-11-16 19:08:29 +0800
commit434aa8343fdcbb4d5002f934979913c099489bee (patch)
tree55bab4ec5a6151be57797d34f61faf5ea744471b /frontend-old/node_modules/@grpc/grpc-js/src/resolver.ts
parent893c388d4e99442a36005e5971a87730623f946e (diff)
sdk, del
Diffstat (limited to 'frontend-old/node_modules/@grpc/grpc-js/src/resolver.ts')
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-/*
- * 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 { MethodConfig, ServiceConfig } from './service-config';
-import { StatusObject } from './call-interface';
-import { SubchannelAddress } from './subchannel-address';
-import { GrpcUri, uriToString } from './uri-parser';
-import { ChannelOptions } from './channel-options';
-import { Metadata } from './metadata';
-import { Status } from './constants';
-import { Filter, FilterFactory } from './filter';
-
-export interface CallConfig {
- methodConfig: MethodConfig;
- onCommitted?: () => void;
- pickInformation: { [key: string]: string };
- status: Status;
- dynamicFilterFactories: FilterFactory<Filter>[];
-}
-
-/**
- * Selects a configuration for a method given the name and metadata. Defined in
- * https://github.com/grpc/proposal/blob/master/A31-xds-timeout-support-and-config-selector.md#new-functionality-in-grpc
- */
-export interface ConfigSelector {
- (methodName: string, metadata: Metadata): CallConfig;
-}
-
-/**
- * A listener object passed to the resolver's constructor that provides name
- * resolution updates back to the resolver's owner.
- */
-export interface ResolverListener {
- /**
- * Called whenever the resolver has new name resolution results to report
- * @param addressList The new list of backend addresses
- * @param serviceConfig The new service configuration corresponding to the
- * `addressList`. Will be `null` if no service configuration was
- * retrieved or if the service configuration was invalid
- * @param serviceConfigError If non-`null`, indicates that the retrieved
- * service configuration was invalid
- */
- onSuccessfulResolution(
- addressList: SubchannelAddress[],
- serviceConfig: ServiceConfig | null,
- serviceConfigError: StatusObject | null,
- configSelector: ConfigSelector | null,
- attributes: { [key: string]: unknown }
- ): void;
- /**
- * Called whenever a name resolution attempt fails.
- * @param error Describes how resolution failed
- */
- onError(error: StatusObject): void;
-}
-
-/**
- * A resolver class that handles one or more of the name syntax schemes defined
- * in the [gRPC Name Resolution document](https://github.com/grpc/grpc/blob/master/doc/naming.md)
- */
-export interface Resolver {
- /**
- * Indicates that the caller wants new name resolution data. Calling this
- * function may eventually result in calling one of the `ResolverListener`
- * functions, but that is not guaranteed. Those functions will never be
- * called synchronously with the constructor or updateResolution.
- */
- updateResolution(): void;
-
- /**
- * Discard all resources owned by the resolver. A later call to
- * `updateResolution` should reinitialize those resources. No
- * `ResolverListener` callbacks should be called after `destroy` is called
- * until `updateResolution` is called again.
- */
- destroy(): void;
-}
-
-export interface ResolverConstructor {
- new (
- target: GrpcUri,
- listener: ResolverListener,
- channelOptions: ChannelOptions
- ): Resolver;
- /**
- * Get the default authority for a target. This loosely corresponds to that
- * target's hostname. Throws an error if this resolver class cannot parse the
- * `target`.
- * @param target
- */
- getDefaultAuthority(target: GrpcUri): string;
-}
-
-const registeredResolvers: { [scheme: string]: ResolverConstructor } = {};
-let defaultScheme: string | null = null;
-
-/**
- * Register a resolver class to handle target names prefixed with the `prefix`
- * string. This prefix should correspond to a URI scheme name listed in the
- * [gRPC Name Resolution document](https://github.com/grpc/grpc/blob/master/doc/naming.md)
- * @param prefix
- * @param resolverClass
- */
-export function registerResolver(
- scheme: string,
- resolverClass: ResolverConstructor
-) {
- registeredResolvers[scheme] = resolverClass;
-}
-
-/**
- * Register a default resolver to handle target names that do not start with
- * any registered prefix.
- * @param resolverClass
- */
-export function registerDefaultScheme(scheme: string) {
- defaultScheme = scheme;
-}
-
-/**
- * Create a name resolver for the specified target, if possible. Throws an
- * error if no such name resolver can be created.
- * @param target
- * @param listener
- */
-export function createResolver(
- target: GrpcUri,
- listener: ResolverListener,
- options: ChannelOptions
-): Resolver {
- if (target.scheme !== undefined && target.scheme in registeredResolvers) {
- return new registeredResolvers[target.scheme](target, listener, options);
- } else {
- throw new Error(
- `No resolver could be created for target ${uriToString(target)}`
- );
- }
-}
-
-/**
- * Get the default authority for the specified target, if possible. Throws an
- * error if no registered name resolver can parse that target string.
- * @param target
- */
-export function getDefaultAuthority(target: GrpcUri): string {
- if (target.scheme !== undefined && target.scheme in registeredResolvers) {
- return registeredResolvers[target.scheme].getDefaultAuthority(target);
- } else {
- throw new Error(`Invalid target ${uriToString(target)}`);
- }
-}
-
-export function mapUriDefaultScheme(target: GrpcUri): GrpcUri | null {
- if (target.scheme === undefined || !(target.scheme in registeredResolvers)) {
- if (defaultScheme !== null) {
- return {
- scheme: defaultScheme,
- authority: undefined,
- path: uriToString(target),
- };
- } else {
- return null;
- }
- }
- return target;
-}