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matcher.go
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/
matcher.go
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package models
import (
"encoding/json"
"fmt"
"github.com/gobwas/glob"
"regexp"
)
const (
PathRegex = "(?i)^((/[^/\\*]*)*)(/((\\*){1,2}))?$"
)
type PathMatchers []*PathMatcher
func (res PathMatchers) Match(path string) bool {
for _, re := range res {
if re.Match(path) {
return true
}
}
return false
}
type PathMatcher struct {
pathMatcher *regexp.Regexp
expr string
appPath string
}
func NewPathMatcher(path string) *PathMatcher {
err := checkPathMatcher(path)
if err != nil {
panic(err)
}
return &PathMatcher{
pathMatcher: generatePathMatcher(path),
expr: path,
appPath: generateRawPath(path),
}
}
func (re PathMatcher) String() string {
return re.expr
}
func (re PathMatcher) AppPath() string {
return re.appPath
}
func (re PathMatcher) CreateRoutePath(finalPath string) string {
return re.appPath + finalPath
}
func (re PathMatcher) Match(path string) bool {
return re.pathMatcher.MatchString(path)
}
func (re *PathMatcher) UnmarshalYAML(unmarshal func(interface{}) error) error {
var s string
err := unmarshal(&s)
if err != nil {
return fmt.Errorf("when unmarshal path matcher: %s", err.Error())
}
err = re.Load(s)
if err != nil {
return fmt.Errorf("when unmarshal path matcher: %s", err.Error())
}
return nil
}
func (re *PathMatcher) UnmarshalCloud(data interface{}) error {
return re.Load(data.(string))
}
func (re *PathMatcher) UnmarshalJSON(b []byte) error {
var s string
err := json.Unmarshal(b, &s)
if err != nil {
return fmt.Errorf("when unmarshal path matcher: %s", err.Error())
}
err = re.Load(s)
if err != nil {
return fmt.Errorf("when unmarshal path matcher: %s", err.Error())
}
return nil
}
func (re *PathMatcher) Load(s string) error {
err := checkPathMatcher(s)
if err != nil {
return err
}
re.pathMatcher = generatePathMatcher(s)
re.expr = s
re.appPath = generateRawPath(s)
return nil
}
func checkPathMatcher(path string) error {
reg := regexp.MustCompile(PathRegex)
if !reg.MatchString(path) {
return fmt.Errorf("Invalid path, e.g.: /api/** to match everything, /api/* to match first level or /api to only match this")
}
return nil
}
func generateRawPath(path string) string {
reg := regexp.MustCompile(PathRegex)
sub := reg.FindStringSubmatch(path)
return sub[1]
}
func generatePathMatcher(path string) *regexp.Regexp {
var pathMatcher *regexp.Regexp
reg := regexp.MustCompile(PathRegex)
sub := reg.FindStringSubmatch(path)
muxRoute := regexp.QuoteMeta(sub[1])
globSub := sub[4]
switch globSub {
case "*":
pathMatcher = regexp.MustCompile(fmt.Sprintf("^%s(/[^/]*)?$", muxRoute))
case "**":
pathMatcher = regexp.MustCompile(fmt.Sprintf("^%s(/.*)?$", muxRoute))
default:
pathMatcher = regexp.MustCompile(fmt.Sprintf("^%s$", muxRoute))
}
return pathMatcher
}
type HostMatchers []*HostMatcher
func (m HostMatchers) Match(s string) bool {
for _, matcher := range m {
if matcher.Match(s) {
return true
}
}
return false
}
type HostMatcher struct {
glob.Glob
raw string
}
func NewHostMatcher(hostOrWildcard string) *HostMatcher {
return &HostMatcher{
Glob: glob.MustCompile(hostOrWildcard, '.'),
raw: hostOrWildcard,
}
}
func (re *HostMatcher) Load(s string) error {
var err error
re.Glob, err = glob.Compile(s, '.')
re.raw = s
return err
}
func (re *HostMatcher) UnmarshalYAML(unmarshal func(interface{}) error) error {
var s string
err := unmarshal(&s)
if err != nil {
return fmt.Errorf("when unmarshal host matcher: %s", err.Error())
}
err = re.Load(s)
if err != nil {
return fmt.Errorf("when unmarshal host matcher: %s", err.Error())
}
return nil
}
func (re *HostMatcher) UnmarshalCloud(data interface{}) error {
return re.Load(data.(string))
}
func (re *HostMatcher) UnmarshalJSON(b []byte) error {
var s string
err := json.Unmarshal(b, &s)
if err != nil {
return fmt.Errorf("when unmarshal host matcher: %s", err.Error())
}
err = re.Load(s)
if err != nil {
return fmt.Errorf("when unmarshal host matcher: %s", err.Error())
}
return nil
}
func (re HostMatcher) String() string {
return re.raw
}