mirror of
https://github.com/osmarks/mycorrhiza.git
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91 lines
3.0 KiB
Go
91 lines
3.0 KiB
Go
package util
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import (
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"crypto/rand"
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"encoding/hex"
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"github.com/bouncepaw/mycomarkup/util"
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"github.com/bouncepaw/mycorrhiza/cfg"
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"log"
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"net/http"
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"regexp"
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"strings"
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)
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// PrepareRq strips the trailing / in rq.URL.Path. In the future it might do more stuff for making all request structs uniform.
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func PrepareRq(rq *http.Request) {
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rq.URL.Path = strings.TrimSuffix(rq.URL.Path, "/")
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}
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// ShorterPath is used by handlerList to display shorter path to the files. It simply strips WikiGitDir.
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func ShorterPath(path string) string {
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if strings.HasPrefix(path, cfg.WikiGitDir) {
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tmp := strings.TrimPrefix(path, cfg.WikiGitDir)
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if tmp == "" {
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return ""
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}
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return tmp[1:]
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}
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return path
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}
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// HTTP404Page writes a 404 error in the status, needed when no content is found on the page.
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func HTTP404Page(w http.ResponseWriter, page string) {
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w.Header().Set("Content-Type", "text/html;charset=utf-8")
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w.WriteHeader(http.StatusNotFound)
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_, _ = w.Write([]byte(page))
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}
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// HTTP200Page wraps some frequently used things for successful 200 responses.
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func HTTP200Page(w http.ResponseWriter, page string) {
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w.Header().Set("Content-Type", "text/html;charset=utf-8")
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w.WriteHeader(http.StatusOK)
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_, _ = w.Write([]byte(page))
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}
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// RandomString generates a random string of the given length. It is cryptographically secure to some extent.
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func RandomString(n int) (string, error) {
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bytes := make([]byte, n)
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if _, err := rand.Read(bytes); err != nil {
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return "", err
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}
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return hex.EncodeToString(bytes), nil
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}
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// BeautifulName makes the ugly name beautiful by replacing _ with spaces and using title case.
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func BeautifulName(uglyName string) string {
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// Why not reuse
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return util.BeautifulName(uglyName)
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}
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// CanonicalName makes sure the `name` is canonical. A name is canonical if it is lowercase and all spaces are replaced with underscores.
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func CanonicalName(name string) string {
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return util.CanonicalName(name)
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}
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// hyphaPattern is a pattern which all hypha names must match.
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var hyphaPattern = regexp.MustCompile(`[^?!:#@><*|"'&%{}]+`)
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var usernamePattern = regexp.MustCompile(`[^?!:#@><*|"'&%{}/]+`)
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// IsCanonicalName checks if the `name` is canonical.
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func IsCanonicalName(name string) bool {
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return hyphaPattern.MatchString(name)
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}
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// IsPossibleUsername is true if the given username is ok. Same as IsCanonicalName, but cannot have / in it and cannot be equal to "anon" or "wikimind"
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func IsPossibleUsername(username string) bool {
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return username != "anon" && username != "wikimind" && usernamePattern.MatchString(strings.TrimSpace(username))
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}
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// HyphaNameFromRq extracts hypha name from http request. You have to also pass the action which is embedded in the url or several actions. For url /hypha/hypha, the action would be "hypha".
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func HyphaNameFromRq(rq *http.Request, actions ...string) string {
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p := rq.URL.Path
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for _, action := range actions {
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if strings.HasPrefix(p, "/"+action+"/") {
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return CanonicalName(strings.TrimPrefix(p, "/"+action+"/"))
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}
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}
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log.Println("HyphaNameFromRq: this request is invalid, fall back to home hypha")
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return cfg.HomeHypha
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}
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