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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
// Copyright (C) 2012-2014 Miquel Sabaté Solà <mikisabate@gmail.com>
// This file is licensed under the MIT license.
// See the LICENSE file.
package user_agent
import (
"regexp"
"strings"
)
// A struct containing all the information that we might be
// interested from the browser.
type Browser struct {
// The name of the browser's engine.
Engine string
// The version of the browser's engine.
EngineVersion string
// The name of the browser.
Name string
// The version of the browser.
Version string
}
// Extract all the information that we can get from the User-Agent string
// about the browser and update the receiver with this information.
//
// The function receives just one argument "sections", that contains the
// sections from the User-Agent string after being parsed.
func (p *UserAgent) detectBrowser(sections []section) {
slen := len(sections)
if sections[0].name == "Opera" {
p.mozilla = ""
p.browser.Name = "Opera"
p.browser.Version = sections[0].version
p.browser.Engine = "Presto"
if slen > 1 {
p.browser.EngineVersion = sections[1].version
}
} else if slen > 1 {
engine := sections[1]
p.browser.Engine = engine.name
p.browser.EngineVersion = engine.version
if slen > 2 {
p.browser.Version = sections[2].version
if engine.name == "AppleWebKit" {
if sections[slen-1].name == "OPR" {
p.browser.Name = "Opera"
p.browser.Version = sections[slen-1].version
} else if sections[2].name == "Chrome" {
p.browser.Name = "Chrome"
} else {
p.browser.Name = "Safari"
}
} else if engine.name == "Gecko" {
name := sections[2].name
if name == "MRA" && slen > 4 {
name = sections[4].name
p.browser.Version = sections[4].version
}
p.browser.Name = name
} else if engine.name == "like" && sections[2].name == "Gecko" {
// This is the new user agent from Internet Explorer 11.
p.browser.Engine = "Trident"
p.browser.Name = "Internet Explorer"
reg, _ := regexp.Compile("^rv:(.+)$")
for _, c := range sections[0].comment {
version := reg.FindStringSubmatch(c)
if len(version) > 0 {
p.browser.Version = version[1]
return
}
}
p.browser.Version = ""
}
}
} else if slen == 1 && len(sections[0].comment) > 1 {
comment := sections[0].comment
if comment[0] == "compatible" && strings.HasPrefix(comment[1], "MSIE") {
p.browser.Engine = "Trident"
p.browser.Name = "Internet Explorer"
// The MSIE version may be reported as the compatibility version.
// For IE 8 through 10, the Trident token is more accurate.
// http://msdn.microsoft.com/en-us/library/ie/ms537503(v=vs.85).aspx#VerToken
for _, v := range comment {
if strings.HasPrefix(v, "Trident/") {
switch v[8:] {
case "4.0":
p.browser.Version = "8.0"
case "5.0":
p.browser.Version = "9.0"
case "6.0":
p.browser.Version = "10.0"
}
break
}
}
// If the Trident token is not provided, fall back to MSIE token.
if p.browser.Version == "" {
p.browser.Version = strings.TrimSpace(comment[1][4:])
}
}
}
}
// Returns two strings. The first string is the name of the engine and the
// second one is the version of the engine.
func (p *UserAgent) Engine() (string, string) {
return p.browser.Engine, p.browser.EngineVersion
}
// Returns two strings. The first string is the name of the browser and the
// second one is the version of the browser.
func (p *UserAgent) Browser() (string, string) {
return p.browser.Name, p.browser.Version
}
|
