github.com/kaydxh/golang@v0.0.131/go/net/http/http_client_option.go (about) 1 /* 2 *Copyright (c) 2022, kaydxh 3 * 4 *Permission is hereby granted, free of charge, to any person obtaining a copy 5 *of this software and associated documentation files (the "Software"), to deal 6 *in the Software without restriction, including without limitation the rights 7 *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 *copies of the Software, and to permit persons to whom the Software is 9 *furnished to do so, subject to the following conditions: 10 * 11 *The above copyright notice and this permission notice shall be included in all 12 *copies or substantial portions of the Software. 13 * 14 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 *SOFTWARE. 21 */ 22 package http 23 24 // A ClientOption sets options. 25 type ClientOption interface { 26 apply(*Client) 27 } 28 29 // EmptyClientOption does not alter the configuration. It can be embedded 30 // in another structure to build custom options. 31 // 32 // This API is EXPERIMENTAL. 33 type EmptyClientOption struct{} 34 35 func (EmptyClientOption) apply(*Client) {} 36 37 // ClientOptionFunc wraps a function that modifies Client into an 38 // implementation of the ClientOption interface. 39 type ClientOptionFunc func(*Client) 40 41 func (f ClientOptionFunc) apply(do *Client) { 42 f(do) 43 } 44 45 // sample code for option, default for nothing to change 46 func _ClientOptionWithDefault() ClientOption { 47 return ClientOptionFunc(func(*Client) { 48 // nothing to change 49 }) 50 } 51 func (o *Client) ApplyOptions(options ...ClientOption) *Client { 52 for _, opt := range options { 53 if opt == nil { 54 continue 55 } 56 opt.apply(o) 57 } 58 return o 59 }