func considerTrids(q *http.Request) fttp.Responder {
switch q.Method {
case "GET":
// let the range check panic indicate the problem
trid, rx := checkTrid(q, q.URL.Path[len(tridPath):])
if rx != nil {
return rx
}
tags, err := getTags(trid)
if err != nil {
return fttp.ServerError(err)
}
jason, err := json.Marshal(tags)
if err != nil {
return fttp.ServerError(err)
}
r := &fttp.Response{}
r.JSON()
r.Set(jason)
return r
case "DELETE":
// let the range check panic indicate the problem
suffix := q.URL.Path[len(tridPath):]
sep := strings.IndexByte(suffix, '/')
if sep < 1 {
// BUG: bad request
return fttp.NotFound(q, errors.New("trid or tag not specified"))
}
trid, rx := checkTrid(q, suffix[:sep])
if rx != nil {
return rx
}
suffix = suffix[sep:]
if !strings.HasPrefix(suffix, "/tag/") {
// BUG: bad request
return fttp.NotFound(q, errors.New("tag not specified"))
}
tag := suffix[len("/tag/"):]
err := deleteTag(trid, tag)
if err != nil {
return fttp.ServerError(err)
}
r := &fttp.Response{}
r.JSON()
return r
default:
return fttp.BadMethod(q, "GET", "DELETE")
}
}
func checkTrid(q *http.Request, maybeTrid string) (string, fttp.Responder) {
for i := 0; i < len(maybeTrid); i++ {
c := maybeTrid[i]
if c < '0' || c > '9' {
return "", fttp.NotFound(q, NotTridError(maybeTrid))
}
}
return maybeTrid, nil
}