| // 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. |
| |
| package connectclient |
| |
| import ( |
| "github.com/bufbuild/connect-go" |
| ) |
| |
| // Config holds configuration for creating Connect RPC clients. |
| type Config struct { |
| httpClient connect.HTTPClient |
| addressMapper func(string) string |
| interceptors []connect.Interceptor |
| authInterceptorProvider func(string) connect.UnaryInterceptorFunc |
| } |
| |
| // NewConfig creates a new client configuration with the given HTTP client |
| // and options. |
| func NewConfig(httpClient connect.HTTPClient, options ...ConfigOption) *Config { |
| cfg := &Config{ |
| httpClient: httpClient, |
| } |
| for _, opt := range options { |
| opt(cfg) |
| } |
| return cfg |
| } |
| |
| // ConfigOption is an option for customizing a new Config. |
| type ConfigOption func(*Config) |
| |
| // WithAddressMapper maps the address with the given function. |
| func WithAddressMapper(addressMapper func(string) string) ConfigOption { |
| return func(cfg *Config) { |
| cfg.addressMapper = addressMapper |
| } |
| } |
| |
| // WithInterceptors adds the slice of interceptors to all clients returned from this provider. |
| func WithInterceptors(interceptors []connect.Interceptor) ConfigOption { |
| return func(cfg *Config) { |
| cfg.interceptors = interceptors |
| } |
| } |
| |
| // WithAuthInterceptorProvider configures a provider that, when invoked, returns an interceptor that can be added |
| // to a client for setting the auth token |
| func WithAuthInterceptorProvider(authInterceptorProvider func(string) connect.UnaryInterceptorFunc) ConfigOption { |
| return func(cfg *Config) { |
| cfg.authInterceptorProvider = authInterceptorProvider |
| } |
| } |
| |
| // StubFactory is the type of a generated factory function, for creating Connect client stubs. |
| type StubFactory[T any] func(connect.HTTPClient, string, ...connect.ClientOption) T |
| |
| // Make uses the given generated factory function to create a new connect client. |
| func Make[T any](cfg *Config, address string, factory StubFactory[T]) T { |
| interceptors := append([]connect.Interceptor{}, cfg.interceptors...) |
| if cfg.authInterceptorProvider != nil { |
| interceptor := cfg.authInterceptorProvider(address) |
| interceptors = append(interceptors, interceptor) |
| } |
| if cfg.addressMapper != nil { |
| address = cfg.addressMapper(address) |
| } |
| return factory(cfg.httpClient, address, connect.WithInterceptors(interceptors...)) |
| } |