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// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
package main
import (
"errors"
"net/http"
"net/url"
"strings"
)
var (
errDupRefSpec = errors.New("duplicate ref spec")
errNoRefSpec = errors.New("no ref spec")
)
func getParamRefTypeName(request *http.Request) (retRefType, retRefName string, err error) {
rawQuery := request.URL.RawQuery
queryValues, err := url.ParseQuery(rawQuery)
if err != nil {
return
}
done := false
for _, refType := range []string{"commit", "branch", "tag"} {
refName, ok := queryValues[refType]
if ok {
if done {
err = errDupRefSpec
return
}
done = true
if len(refName) != 1 {
err = errDupRefSpec
return
}
retRefName = refName[0]
retRefType = refType
}
}
if !done {
err = errNoRefSpec
}
return
}
func parseReqURI(requestURI string) (segments []string, params url.Values, err error) {
path, paramsStr, _ := strings.Cut(requestURI, "?")
segments = strings.Split(strings.TrimPrefix(path, "/"), "/")
for i, segment := range segments {
segments[i], err = url.PathUnescape(segment)
if err != nil {
return
}
}
params, err = url.ParseQuery(paramsStr)
return
}
func redirectDir(writer http.ResponseWriter, request *http.Request) bool {
requestURI := request.RequestURI
pathEnd := strings.IndexAny(requestURI, "?#")
var path, rest string
if pathEnd == -1 {
path = requestURI
} else {
path = requestURI[:pathEnd]
rest = requestURI[pathEnd:]
}
if !strings.HasSuffix(path, "/") {
http.Redirect(writer, request, path+"/"+rest, http.StatusSeeOther)
return true
}
return false
}
func redirectNoDir(writer http.ResponseWriter, request *http.Request) bool {
requestURI := request.RequestURI
pathEnd := strings.IndexAny(requestURI, "?#")
var path, rest string
if pathEnd == -1 {
path = requestURI
} else {
path = requestURI[:pathEnd]
rest = requestURI[pathEnd:]
}
if strings.HasSuffix(path, "/") {
http.Redirect(writer, request, strings.TrimSuffix(path, "/")+rest, http.StatusSeeOther)
return true
}
return false
}
func redirectUnconditionally(writer http.ResponseWriter, request *http.Request) {
requestURI := request.RequestURI
pathEnd := strings.IndexAny(requestURI, "?#")
var path, rest string
if pathEnd == -1 {
path = requestURI
} else {
path = requestURI[:pathEnd]
rest = requestURI[pathEnd:]
}
http.Redirect(writer, request, path+rest, http.StatusSeeOther)
}
func segmentsToURL(segments []string) string {
for i, segment := range segments {
segments[i] = url.PathEscape(segment)
}
return strings.Join(segments, "/")
}
func anyContain(ss []string, c string) bool {
for _, s := range ss {
if strings.Contains(s, c) {
return true
}
}
return false
}
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