GolangNote

Golang笔记

golang对输入表单简单验证

Permalink

发现一个很简单、轻量的库,用来验证用户输入的字符串是否合法:

使用很方便:

Go: 表单验证
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
package main

import (
	"regexp"
	"strconv"
)

type validate struct {
	i string
	r bool
	e string
}

func validator(u string) validate {
	var n validate
	n.i = u
	n.r = true
	n.e = ""
	return n
}

func (s *validate) Required() *validate {
	if s.r == true {
		if s.i == "" || len(s.i) <= 0 {
			s.r = false
			s.e = "Is Required"
		}
	}
	return s
}

func (s *validate) minLength(length int) *validate {
	if s.r == true {
		if len(s.i) < length {
			s.r = false
			s.e = "Minimum length " + strconv.Itoa(length) + " characters allowed"
		}
	}
	return s
}

func (s *validate) maxLength(length int) *validate {
	if s.r == true {
		if len(s.i) > length {
			s.r = false
			s.e = "Maximum length " + strconv.Itoa(length) + " characters allowed"
		}
	}
	return s
}

func (s *validate) isEmail() *validate {
	if s.r == true {
		re := regexp.MustCompile("^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$")
		var match = re.MatchString(s.i)
		if !match {
			s.r = false
			s.e = "invalid email"
		}
	}
	return s
}

func (s *validate) oneLowerCase() *validate {
	if s.r == true {
		re := regexp.MustCompile("[a-z]+")
		var match = re.MatchString(s.i)
		if !match {
			s.r = false
			s.e = "does not contain atleast lowercase letter"
		}
	}
	return s
}

func (s *validate) allLowerCase() *validate {
	if s.r == true {
		re := regexp.MustCompile("^[a-z]+$")
		var match = re.MatchString(s.i)
		if !match {
			s.r = false
			s.e = "does not contain lowercase letter"
		}
	}
	return s
}

func (s *validate) oneUpperCase() *validate {
	if s.r == true {
		re := regexp.MustCompile("[A-Z]+")
		var match = re.MatchString(s.i)
		if !match {
			s.r = false
			s.e = "does not contain atleast one uppercase letter"
		}
	}
	return s
}

func (s *validate) allUpperCase() *validate {
	if s.r == true {
		re := regexp.MustCompile("^[A-Z]+$")
		var match = re.MatchString(s.i)
		if !match {
			s.r = false
			s.e = "all letters are not uppercase"
		}
	}
	return s
}

func (s *validate) oneNumber() *validate {
	if s.r == true {
		re := regexp.MustCompile("[0-9]+")
		var match = re.MatchString(s.i)
		if !match {
			s.r = false
			s.e = "does not contain atleast one numeric character"
		}
	}
	return s
}

func (s *validate) isSpecialCharacter() *validate {
	if s.r == true {
		re := regexp.MustCompile("\\`|\\~|\\!|\\@|\\#|\\$|\\%|\\^|\\&|\\*|\\(|\\)|\\+|\\=|\\[|\\{|\\]|\\}|\\||\\|\\'|\\<|\\,|\\.|\\>|\\?|\\/|\"|\\;|\\:|\\s")
		var match = re.MatchString(s.i)
		if !match {
			s.r = false
			s.e = "does not contain atleast one special character"
		}
	}
	return s
}

func (s *validate) check() bool {
	return s.r
}

func main() {
	newInput := validator("golangV$alidation")
	println(newInput.Required().isSpecialCharacter().check())
}

检测项目

输入字符检测

示例

Go: 验证表单示例
1
2
3
userInput := validator("blah!blah!blah!")
userInput.Required().oneLowerCase().check() // false

多重检测

Go: 多重检测
1
userInput.minLength(8).oneLowerCase().oneUpperCase().oneNumber().isSpecialCharacter().check()

Go-Validation 参考 https://github.com/hasanaliqureshi/Go-Validation

本文网址: https://golangnote.com/topic/249.html 转摘请注明来源

Related articles

Golang实现简单的Socks5代理

Socks5 代理较 `http/https` 代理有较好的性能,下面是借鉴某个著名开源软件的 local 实现的简单代理。...

Golang 把cookie 字符串解析为cookie 结构

在做爬虫时有时候会遇到需要带已登录的 cookie 请求,这个时候最简单的方法是在浏览器登录后,在开发者面板找到cookie 字符串,然后拷贝粘贴。这就面临一个问题需要把cookie 字符串解析成Go 语言 cookie 结构体。...

Write a Comment to "golang对输入表单简单验证"

Submit Comment Login
Based on Golang + fastHTTP + sdb | go1.18 Processed in 1ms