Skip to content
Permalink
Branch: master
Find file Copy path
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
108 lines (89 sloc) 2.04 KB
package utils
import (
"net/url"
"path"
"regexp"
"strings"
)
func isAlpha(ch byte) bool {
return 'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_' || ch == '-' || ch == '!'
}
func isDigit(ch byte) bool {
return '0' <= ch && ch <= '9'
}
func isAlnum(ch byte) bool {
return isAlpha(ch) || isDigit(ch)
}
func matchPart(b byte) func(byte) bool {
return func(c byte) bool {
return c != b && c != '/'
}
}
func match(s string, f func(byte) bool, i int) (matched string, next byte, j int) {
j = i
for j < len(s) && f(s[j]) {
j++
}
if j < len(s) {
next = s[j]
}
return s[i:j], next, j
}
// ParamsMatch match string by param
func ParamsMatch(source string, pth string) (url.Values, string, bool) {
var (
i, j int
p = make(url.Values)
ext = path.Ext(pth)
)
pth = strings.TrimSuffix(pth, ext)
if ext != "" {
p.Add(":format", strings.TrimPrefix(ext, "."))
}
for i < len(pth) {
switch {
case j >= len(source):
if source != "/" && len(source) > 0 && source[len(source)-1] == '/' {
return p, pth[:i], true
}
if source == "" && pth == "/" {
return p, pth, true
}
return p, pth[:i], false
case source[j] == ':':
var name, val string
var nextc byte
name, nextc, j = match(source, isAlnum, j+1)
val, _, i = match(pth, matchPart(nextc), i)
if (j < len(source)) && source[j] == '[' {
var index int
if idx := strings.Index(source[j:], "]/"); idx > 0 {
index = idx
} else if source[len(source)-1] == ']' {
index = len(source) - j - 1
}
if index > 0 {
match := strings.TrimSuffix(strings.TrimPrefix(source[j:j+index+1], "["), "]")
if reg, err := regexp.Compile("^" + match + "$"); err == nil && reg.MatchString(val) {
j = j + index + 1
} else {
return nil, "", false
}
}
}
p.Add(":"+name, val)
case pth[i] == source[j]:
i++
j++
default:
return nil, "", false
}
}
if j != len(source) {
if (len(source) == j+1) && source[j] == '/' {
return p, pth, true
}
return nil, "", false
}
return p, pth, true
}
You can’t perform that action at this time.