it.IsHostname - Code Metrics - Inspection of "Merge pull request #41 from muonsoft/hostname-cons..." - muonsoft/validation - Measure and Improve Code Quality continuously with Scrutinizer

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Push — main ( 0f61b2...8dabea )

by Rushan

created 2021-05-13 19:00 UTC

it.IsHostname A

↳ Parent: it/web.go

Complexity

Conditions

Size

Total Lines	6
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	1
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
eloc	6
nop	0
dl	0
loc	6
ccs	1
cts	1
cp	1
crap	1
rs	10
c	0
b	0
f	0

package it

import (
	"errors"
	"net"

	"github.com/muonsoft/validation"
	"github.com/muonsoft/validation/code"
	"github.com/muonsoft/validation/is"
	"github.com/muonsoft/validation/message"
	"github.com/muonsoft/validation/validate"
)

// IsEmail is used for simplified validation of an email address. It allows all values
// with an "@" symbol in, and a "." in the second host part of the email address.
func IsEmail() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.Email,
		"EmailConstraint",
		code.InvalidEmail,
		message.InvalidEmail,
	)
}

// IsHTML5Email is used for validation of an email address based on pattern for HTML5
// (see https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address).
func IsHTML5Email() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.HTML5Email,
		"HTML5EmailConstraint",
		code.InvalidEmail,
		message.InvalidEmail,
	)
}

// IsHostname validates that a value is a valid hostname. It checks that:
//	• each label within a valid hostname may be no more than 63 octets long;
//	• the total length of the hostname must not exceed 255 characters;
//	• hostname is fully qualified and include its top-level domain name
//	  (for instance, example.com is valid but example is not);
//	• checks for reserved top-level domains according to RFC 2606
//	  (hostnames containing them are not considered valid:
//	  .example, .invalid, .localhost, and .test).
//
// If you do not want to check for top-level domains use IsLooseHostname version of constraint.
func IsHostname() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.StrictHostname,
		"HostnameConstraint",
		code.InvalidHostname,
		message.InvalidHostname,
	)
}

// IsLooseHostname validates that a value is a valid hostname. It checks that:
//	• each label within a valid hostname may be no more than 63 octets long;
//	• the total length of the hostname must not exceed 255 characters.
func IsLooseHostname() validation.CustomStringConstraint {
	return validation.NewCustomStringConstraint(
		is.Hostname,
		"LooseHostnameConstraint",
		code.InvalidHostname,
		message.InvalidHostname,
	)
}

// URLConstraint is used to validate URL string. This constraint doesn’t check that the host of the
// given URL really exists, because the information of the DNS records is not reliable.
//
// This constraint doesn't check the length of the URL. Use LengthConstraint to check the length of the given value.
type URLConstraint struct {
	isIgnored              bool
	supportsRelativeSchema bool
	schemas                []string
	messageTemplate        string
}

// IsURL creates a URLConstraint to validate an URL. By default, constraint checks
// only for the http:// and https:// schemas. Use the WithSchemas method to configure
// the list of expected schemas. Also, you can use WithRelativeSchema to enable support
// of the relative schema (without schema, e.g. "//example.com").
func IsURL() URLConstraint {
	return URLConstraint{
		schemas:         []string{"http", "https"},
		messageTemplate: message.InvalidURL,
	}
}

// SetUp will return an error if the list of schemas is empty.
func (c URLConstraint) SetUp() error {
	if len(c.schemas) == 0 {
		return errEmptySchemas
	}

	return nil
}

// Name is the constraint name.
func (c URLConstraint) Name() string {
	return "URLConstraint"
}

// WithRelativeSchema enables support of relative URL schema, which means that URL value
// may be treated as relative (without schema, e.g. "//example.com").
func (c URLConstraint) WithRelativeSchema() URLConstraint {
	c.supportsRelativeSchema = true
	return c
}

// WithSchemas is used to set up a list of accepted schemas. For example, if you also consider the ftp:// type URLs
// to be valid, redefine the schemas list, listing http, https, and also ftp.
// If the list is empty, then an error will be returned by the SetUp method.
func (c URLConstraint) WithSchemas(schemas ...string) URLConstraint {
	c.schemas = schemas
	return c
}

// Message sets the violation message template. You can use template parameters
// for injecting its values into the final message:
//
//	{{ value }} - the current (invalid) value.
func (c URLConstraint) Message(message string) URLConstraint {
	c.messageTemplate = message
	return c
}

// When enables conditional validation of this constraint. If the expression evaluates to false,
// then the constraint will be ignored.
func (c URLConstraint) When(condition bool) URLConstraint {
	c.isIgnored = !condition
	return c
}

func (c URLConstraint) ValidateString(value *string, scope validation.Scope) error {
	if c.isIgnored || value == nil || *value == "" {
		return nil
	}

	schemas := c.schemas
	if c.supportsRelativeSchema {
		schemas = append(schemas, "")
	}
	if is.URL(*value, schemas...) {
		return nil
	}

	return scope.BuildViolation(code.InvalidURL, c.messageTemplate).
		AddParameter("{{ value }}", *value).
		CreateViolation()
}

// IPConstraint is used to validate IP address. You can check for different versions
// and restrict some ranges by additional options.
type IPConstraint struct {
	isIgnored    bool
	validate     func(value string, restrictions ...validate.IPRestriction) error
	restrictions []validate.IPRestriction

	invalidMessageTemplate    string
	prohibitedMessageTemplate string
}

// IsIP creates an IPConstraint to validate an IP address (IPv4 or IPv6).
func IsIP() IPConstraint {
	return newIPConstraint(validate.IP)
}

// IsIPv4 creates an IPConstraint to validate an IPv4 address.
func IsIPv4() IPConstraint {
	return newIPConstraint(validate.IPv4)
}

// IsIPv6 creates an IPConstraint to validate an IPv4 address.
func IsIPv6() IPConstraint {
	return newIPConstraint(validate.IPv6)
}

func newIPConstraint(validate func(value string, restrictions ...validate.IPRestriction) error) IPConstraint {
	return IPConstraint{
		validate:                  validate,
		invalidMessageTemplate:    message.InvalidIP,
		prohibitedMessageTemplate: message.ProhibitedIP,
	}
}

// SetUp always returns no error.
func (c IPConstraint) SetUp() error {
	return nil
}

// Name is the constraint name.
func (c IPConstraint) Name() string {
	return "IPConstraint"
}

// DenyPrivateIP denies using of private IPs according to RFC 1918 (IPv4 addresses)
// and RFC 4193 (IPv6 addresses).
func (c IPConstraint) DenyPrivateIP() IPConstraint {
	c.restrictions = append(c.restrictions, validate.DenyPrivateIP())
	return c
}

// DenyIP can be used to deny custom range of IP addresses.
func (c IPConstraint) DenyIP(restrict func(ip net.IP) bool) IPConstraint {
	c.restrictions = append(c.restrictions, restrict)
	return c
}

// InvalidMessage sets the violation message template for invalid IP case.
// You can use template parameters for injecting its values into the final message:
//
//	{{ value }} - the current (invalid) value.
func (c IPConstraint) InvalidMessage(message string) IPConstraint {
	c.invalidMessageTemplate = message
	return c
}

// ProhibitedMessage sets the violation message template for prohibited IP case.
// You can use template parameters for injecting its values into the final message:
//
//	{{ value }} - the current (invalid) value.
func (c IPConstraint) ProhibitedMessage(message string) IPConstraint {
	c.prohibitedMessageTemplate = message
	return c
}

// When enables conditional validation of this constraint. If the expression evaluates to false,
// then the constraint will be ignored.
func (c IPConstraint) When(condition bool) IPConstraint {
	c.isIgnored = !condition
	return c
}

func (c IPConstraint) ValidateString(value *string, scope validation.Scope) error {
	if c.isIgnored || value == nil || *value == "" {
		return nil
	}

	return c.validateIP(*value, scope)
}

func (c IPConstraint) validateIP(value string, scope validation.Scope) error {
	err := c.validate(value, c.restrictions...)
	if err != nil {
		var builder *validation.ViolationBuilder

		if errors.Is(err, validate.ErrProhibited) {
			builder = scope.BuildViolation(code.ProhibitedIP, c.prohibitedMessageTemplate)
		} else {
			builder = scope.BuildViolation(code.InvalidIP, c.invalidMessageTemplate)
		}

		return builder.AddParameter("{{ value }}", value).CreateViolation()
	}

	return nil
}


1		package it
2
3		import (
4		"errors"
5		"net"
6
7		"github.com/muonsoft/validation"
8		"github.com/muonsoft/validation/code"
9		"github.com/muonsoft/validation/is"
10		"github.com/muonsoft/validation/message"
11		"github.com/muonsoft/validation/validate"
12		)
13
14		// IsEmail is used for simplified validation of an email address. It allows all values
15		// with an "@" symbol in, and a "." in the second host part of the email address.
16		func IsEmail() validation.CustomStringConstraint {
17	1	return validation.NewCustomStringConstraint(
18		is.Email,
19		"EmailConstraint",
20		code.InvalidEmail,
21		message.InvalidEmail,
22		)
23		}
24
25		// IsHTML5Email is used for validation of an email address based on pattern for HTML5
26		// (see https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address).
27		func IsHTML5Email() validation.CustomStringConstraint {
28	1	return validation.NewCustomStringConstraint(
29		is.HTML5Email,
30		"HTML5EmailConstraint",
31		code.InvalidEmail,
32		message.InvalidEmail,
33		)
34		}
35
36		// IsHostname validates that a value is a valid hostname. It checks that:
37		// • each label within a valid hostname may be no more than 63 octets long;
38		// • the total length of the hostname must not exceed 255 characters;
39		// • hostname is fully qualified and include its top-level domain name
40		// (for instance, example.com is valid but example is not);
41		// • checks for reserved top-level domains according to RFC 2606
42		// (hostnames containing them are not considered valid:
43		// .example, .invalid, .localhost, and .test).
44		//
45		// If you do not want to check for top-level domains use IsLooseHostname version of constraint.
46		func IsHostname() validation.CustomStringConstraint {
47	1	return validation.NewCustomStringConstraint(
48		is.StrictHostname,
49		"HostnameConstraint",
50		code.InvalidHostname,
51		message.InvalidHostname,
52		)
53		}
54
55		// IsLooseHostname validates that a value is a valid hostname. It checks that:
56		// • each label within a valid hostname may be no more than 63 octets long;
57		// • the total length of the hostname must not exceed 255 characters.
58		func IsLooseHostname() validation.CustomStringConstraint {
59	1	return validation.NewCustomStringConstraint(
60		is.Hostname,
61		"LooseHostnameConstraint",
62		code.InvalidHostname,
63		message.InvalidHostname,
64		)
65		}
66
67		// URLConstraint is used to validate URL string. This constraint doesn’t check that the host of the
68		// given URL really exists, because the information of the DNS records is not reliable.
69		//
70		// This constraint doesn't check the length of the URL. Use LengthConstraint to check the length of the given value.
71		type URLConstraint struct {
72		isIgnored bool
73		supportsRelativeSchema bool
74		schemas []string
75		messageTemplate string
76		}
77
78		// IsURL creates a URLConstraint to validate an URL. By default, constraint checks
79		// only for the http:// and https:// schemas. Use the WithSchemas method to configure
80		// the list of expected schemas. Also, you can use WithRelativeSchema to enable support
81		// of the relative schema (without schema, e.g. "//example.com").
82		func IsURL() URLConstraint {
83	1	return URLConstraint{
84		schemas: []string{"http", "https"},
85		messageTemplate: message.InvalidURL,
86		}
87		}
88
89		// SetUp will return an error if the list of schemas is empty.
90		func (c URLConstraint) SetUp() error {
91	1	if len(c.schemas) == 0 {
92	1	return errEmptySchemas
93		}
94
95	1	return nil
96		}
97
98		// Name is the constraint name.
99		func (c URLConstraint) Name() string {
100	1	return "URLConstraint"
101		}
102
103		// WithRelativeSchema enables support of relative URL schema, which means that URL value
104		// may be treated as relative (without schema, e.g. "//example.com").
105		func (c URLConstraint) WithRelativeSchema() URLConstraint {
106	1	c.supportsRelativeSchema = true
107	1	return c
108		}
109
110		// WithSchemas is used to set up a list of accepted schemas. For example, if you also consider the ftp:// type URLs
111		// to be valid, redefine the schemas list, listing http, https, and also ftp.
112		// If the list is empty, then an error will be returned by the SetUp method.
113		func (c URLConstraint) WithSchemas(schemas ...string) URLConstraint {
114	1	c.schemas = schemas
115	1	return c
116		}
117
118		// Message sets the violation message template. You can use template parameters
119		// for injecting its values into the final message:
120		//
121		// {{ value }} - the current (invalid) value.
122		func (c URLConstraint) Message(message string) URLConstraint {
123	1	c.messageTemplate = message
124	1	return c
125		}
126
127		// When enables conditional validation of this constraint. If the expression evaluates to false,
128		// then the constraint will be ignored.
129		func (c URLConstraint) When(condition bool) URLConstraint {
130	1	c.isIgnored = !condition
131	1	return c
132		}
133
134		func (c URLConstraint) ValidateString(value *string, scope validation.Scope) error {
135	1	if c.isIgnored \|\| value == nil \|\| *value == "" {
136	1	return nil
137		}
138
139	1	schemas := c.schemas
140	1	if c.supportsRelativeSchema {
141	1	schemas = append(schemas, "")
142		}
143	1	if is.URL(*value, schemas...) {
144	1	return nil
145		}
146
147	1	return scope.BuildViolation(code.InvalidURL, c.messageTemplate).
148		AddParameter("{{ value }}", *value).
149		CreateViolation()
150		}
151
152		// IPConstraint is used to validate IP address. You can check for different versions
153		// and restrict some ranges by additional options.
154		type IPConstraint struct {
155		isIgnored bool
156		validate func(value string, restrictions ...validate.IPRestriction) error
157		restrictions []validate.IPRestriction
158
159		invalidMessageTemplate string
160		prohibitedMessageTemplate string
161		}
162
163		// IsIP creates an IPConstraint to validate an IP address (IPv4 or IPv6).
164		func IsIP() IPConstraint {
165	1	return newIPConstraint(validate.IP)
166		}
167
168		// IsIPv4 creates an IPConstraint to validate an IPv4 address.
169		func IsIPv4() IPConstraint {
170	1	return newIPConstraint(validate.IPv4)
171		}
172
173		// IsIPv6 creates an IPConstraint to validate an IPv4 address.
174		func IsIPv6() IPConstraint {
175	1	return newIPConstraint(validate.IPv6)
176		}
177
178		func newIPConstraint(validate func(value string, restrictions ...validate.IPRestriction) error) IPConstraint {
179	1	return IPConstraint{
180		validate: validate,
181		invalidMessageTemplate: message.InvalidIP,
182		prohibitedMessageTemplate: message.ProhibitedIP,
183		}
184		}
185
186		// SetUp always returns no error.
187		func (c IPConstraint) SetUp() error {
188	1	return nil
189		}
190
191		// Name is the constraint name.
192		func (c IPConstraint) Name() string {
193		return "IPConstraint"
194		}
195
196		// DenyPrivateIP denies using of private IPs according to RFC 1918 (IPv4 addresses)
197		// and RFC 4193 (IPv6 addresses).
198		func (c IPConstraint) DenyPrivateIP() IPConstraint {
199	1	c.restrictions = append(c.restrictions, validate.DenyPrivateIP())
200	1	return c
201		}
202
203		// DenyIP can be used to deny custom range of IP addresses.
204		func (c IPConstraint) DenyIP(restrict func(ip net.IP) bool) IPConstraint {
205	1	c.restrictions = append(c.restrictions, restrict)
206	1	return c
207		}
208
209		// InvalidMessage sets the violation message template for invalid IP case.
210		// You can use template parameters for injecting its values into the final message:
211		//
212		// {{ value }} - the current (invalid) value.
213		func (c IPConstraint) InvalidMessage(message string) IPConstraint {
214	1	c.invalidMessageTemplate = message
215	1	return c
216		}
217
218		// ProhibitedMessage sets the violation message template for prohibited IP case.
219		// You can use template parameters for injecting its values into the final message:
220		//
221		// {{ value }} - the current (invalid) value.
222		func (c IPConstraint) ProhibitedMessage(message string) IPConstraint {
223	1	c.prohibitedMessageTemplate = message
224	1	return c
225		}
226
227		// When enables conditional validation of this constraint. If the expression evaluates to false,
228		// then the constraint will be ignored.
229		func (c IPConstraint) When(condition bool) IPConstraint {
230	1	c.isIgnored = !condition
231	1	return c
232		}
233
234		func (c IPConstraint) ValidateString(value *string, scope validation.Scope) error {
235	1	if c.isIgnored \|\| value == nil \|\| *value == "" {
236	1	return nil
237		}
238
239	1	return c.validateIP(*value, scope)
240		}
241
242		func (c IPConstraint) validateIP(value string, scope validation.Scope) error {
243	1	err := c.validate(value, c.restrictions...)
244	1	if err != nil {
245	1	var builder *validation.ViolationBuilder
246
247	1	if errors.Is(err, validate.ErrProhibited) {
248	1	builder = scope.BuildViolation(code.ProhibitedIP, c.prohibitedMessageTemplate)
249		} else {
250	1	builder = scope.BuildViolation(code.InvalidIP, c.invalidMessageTemplate)
251		}
252
253	1	return builder.AddParameter("{{ value }}", value).CreateViolation()
254		}
255
256	1	return nil
257		}
258

muonsoft / validation

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it.IsHostname A

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