github.com/kaydxh/golang@v0.0.131/go/net/resolver/passthrough/passthrough.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 passthrough
    23  
    24  import (
    25  	"github.com/kaydxh/golang/go/net/resolver"
    26  )
    27  
    28  const scheme = "passthrough"
    29  
    30  type passthroughBuilder struct{}
    31  
    32  func (*passthroughBuilder) Build(target resolver.Target, opts ...resolver.ResolverBuildOption) (resolver.Resolver, error) {
    33  	var opt resolver.ResolverBuildOptions
    34  	opt.ApplyOptions(opts...)
    35  	r := &passthroughResolver{
    36  		target: target,
    37  	}
    38  	return r, nil
    39  }
    40  
    41  func (*passthroughBuilder) Scheme() string {
    42  	return scheme
    43  }
    44  
    45  type passthroughResolver struct {
    46  	target resolver.Target
    47  }
    48  
    49  func (r *passthroughResolver) ResolveOne(opts ...resolver.ResolveOneOption) (resolver.Address, error) {
    50  	return resolver.Address{Addr: r.target.Endpoint}, nil
    51  }
    52  
    53  func (r *passthroughResolver) ResolveAll(opts ...resolver.ResolveAllOption) ([]resolver.Address, error) {
    54  	return []resolver.Address{{Addr: r.target.Endpoint}}, nil
    55  }
    56  
    57  func (r *passthroughResolver) ResolveNow(opts ...resolver.ResolveNowOption) {}
    58  
    59  func (*passthroughResolver) Close() {}
    60  
    61  func init() {
    62  	resolver.Register(&passthroughBuilder{})
    63  }