github.com/kaydxh/golang@v0.0.131/go/net/url/url.resolve.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 url
    23  
    24  import (
    25  	"context"
    26  	"net/url"
    27  
    28  	resolve_ "github.com/kaydxh/golang/go/net/resolver/resolve"
    29  )
    30  
    31  func ResolveWithTarget(ctx context.Context, u *url.URL, target string) (*url.URL, error) {
    32  
    33  	if u == nil {
    34  		return nil, nil
    35  	}
    36  	newUrl := u
    37  	if target == "" {
    38  		return newUrl, nil
    39  	}
    40  
    41  	addr, err := resolve_.ResolveOne(ctx, target)
    42  	if err != nil {
    43  		return nil, err
    44  	}
    45  	newUrl.Host = addr.Addr
    46  	return newUrl, nil
    47  }