-
Notifications
You must be signed in to change notification settings - Fork 0
/
header.go
74 lines (67 loc) · 2.02 KB
/
header.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
// Copyright 2017 Istio Authors
//
// Licensed 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 envoy
import (
"fmt"
"regexp"
"sort"
proxyconfig "istio.io/api/proxy/v1/config"
"istio.io/core/model"
)
func buildHTTPRouteMatch(matches *proxyconfig.MatchCondition) *HTTPRoute {
path := ""
prefix := "/"
var headers Headers
if matches != nil && matches.Request != nil {
for name, match := range matches.Request.Headers {
if name == model.HeaderURI {
// assumes `uri` condition is non-empty
switch m := match.MatchType.(type) {
case *proxyconfig.StringMatch_Exact:
path = m.Exact
prefix = ""
case *proxyconfig.StringMatch_Prefix:
path = ""
prefix = m.Prefix
case *proxyconfig.StringMatch_Regex:
headers = append(headers, buildHeader(name, match))
}
} else {
headers = append(headers, buildHeader(name, match))
}
}
sort.Sort(headers)
}
return &HTTPRoute{
Path: path,
Prefix: prefix,
Headers: headers,
}
}
func buildHeader(name string, match *proxyconfig.StringMatch) Header {
header := Header{Name: name}
switch m := match.MatchType.(type) {
case *proxyconfig.StringMatch_Exact:
header.Value = m.Exact
case *proxyconfig.StringMatch_Prefix:
// Envoy regex grammar is ECMA-262 (http://en.cppreference.com/w/cpp/regex/ecmascript)
// Golang has a slightly different regex grammar
header.Value = fmt.Sprintf("^%s.*", regexp.QuoteMeta(m.Prefix))
header.Regex = true
case *proxyconfig.StringMatch_Regex:
header.Value = m.Regex
header.Regex = true
}
return header
}