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// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package validation
import (
"fmt"
"net/url"
"regexp"
"strings"
"github.com/go-macaron/binding"
)
const (
// ErrGitRefName is git reference name error
ErrGitRefName = "GitRefNameError"
)
var (
// GitRefNamePattern is regular expression wirh unallowed characters in git reference name
GitRefNamePattern = regexp.MustCompile("[^\\d\\w-_\\./]")
)
// AddBindingRules adds additional binding rules
func AddBindingRules() {
addGitRefNameBindingRule()
addValidURLBindingRule()
}
func addGitRefNameBindingRule() {
// Git refname validation rule
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return strings.HasPrefix(rule, "GitRefName")
},
IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := fmt.Sprintf("%v", val)
if GitRefNamePattern.MatchString(str) {
errs.Add([]string{name}, ErrGitRefName, "GitRefName")
return false, errs
}
// Additional rules as described at https://www.kernel.org/pub/software/scm/git/docs/git-check-ref-format.html
if strings.HasPrefix(str, "/") || strings.HasSuffix(str, "/") ||
strings.HasPrefix(str, ".") || strings.HasSuffix(str, ".") ||
strings.HasSuffix(str, ".lock") ||
strings.Contains(str, "..") || strings.Contains(str, "//") {
errs.Add([]string{name}, ErrGitRefName, "GitRefName")
return false, errs
}
return true, errs
},
})
}
func addValidURLBindingRule() {
// URL validation rule
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return strings.HasPrefix(rule, "ValidUrl")
},
IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := fmt.Sprintf("%v", val)
if len(str) != 0 {
if u, err := url.ParseRequestURI(str); err != nil ||
(u.Scheme != "http" && u.Scheme != "https") ||
!validPort(portOnly(u.Host)) {
errs.Add([]string{name}, binding.ERR_URL, "Url")
return false, errs
}
}
return true, errs
},
})
}
func portOnly(hostport string) string {
colon := strings.IndexByte(hostport, ':')
if colon == -1 {
return ""
}
if i := strings.Index(hostport, "]:"); i != -1 {
return hostport[i+len("]:"):]
}
if strings.Contains(hostport, "]") {
return ""
}
return hostport[colon+len(":"):]
}
func validPort(p string) bool {
for _, r := range []byte(p) {
if r < '0' || r > '9' {
return false
}
}
return true
}
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