github.com/google/martian/v3@v3.3.3/martianurl/url_matcher.go (about)

     1  // Copyright 2015 Google Inc. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package martianurl
    16  
    17  import (
    18  	"net/http"
    19  	"net/url"
    20  
    21  	"github.com/google/martian/v3/log"
    22  )
    23  
    24  // Matcher is a conditional evaluator of request urls to be used in
    25  // filters that take conditionals.
    26  type Matcher struct {
    27  	url *url.URL
    28  }
    29  
    30  // NewMatcher builds a new url matcher.
    31  func NewMatcher(url *url.URL) *Matcher {
    32  	return &Matcher{
    33  		url: url,
    34  	}
    35  }
    36  
    37  // MatchRequest retuns true if all non-empty URL segments in m.url match the
    38  // request URL.
    39  func (m *Matcher) MatchRequest(req *http.Request) bool {
    40  	matched := m.matches(req.URL)
    41  	if matched {
    42  		log.Debugf("martianurl.Matcher.MatchRequest: matched: %s", req.URL)
    43  	}
    44  	return matched
    45  }
    46  
    47  // MatchResponse retuns true if all non-empty URL segments in m.url match the
    48  // request URL.
    49  func (m *Matcher) MatchResponse(res *http.Response) bool {
    50  	matched := m.matches(res.Request.URL)
    51  	if matched {
    52  		log.Debugf("martianurl.Matcher.MatchResponse: matched: %s", res.Request.URL)
    53  	}
    54  	return matched
    55  }
    56  
    57  // matches forces all non-empty URL segments to match or it returns false.
    58  func (m *Matcher) matches(u *url.URL) bool {
    59  	switch {
    60  	case m.url.Scheme != "" && m.url.Scheme != u.Scheme:
    61  		return false
    62  	case m.url.Host != "" && !MatchHost(u.Host, m.url.Host):
    63  		return false
    64  	case m.url.Path != "" && m.url.Path != u.Path:
    65  		return false
    66  	case m.url.RawQuery != "" && m.url.RawQuery != u.RawQuery:
    67  		return false
    68  	case m.url.Fragment != "" && m.url.Fragment != u.Fragment:
    69  		return false
    70  	}
    71  
    72  	return true
    73  }