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url.go
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/
url.go
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package hchi
import (
"errors"
"net/http"
"net/url"
"unicode/utf8"
"github.com/go-chi/chi"
"github.com/paydex-core/paydex-go/support/render/problem"
)
func GetStringFromURL(r *http.Request, key string) (string, error) {
val, ok := getChiURLParam(r, key)
if ok {
unescapedVal, err := url.PathUnescape(val)
if err != nil {
return "", problem.MakeInvalidFieldProblem(key, err)
}
return unescapedVal, checkUTF8(key, unescapedVal)
}
val = r.FormValue(key)
if val != "" {
return val, checkUTF8(key, val)
}
val = r.URL.Query().Get(key)
return val, checkUTF8(key, val)
}
func checkUTF8(key, val string) error {
if !utf8.ValidString(val) {
// TODO: add errInvalidValue
return problem.MakeInvalidFieldProblem(key, errors.New("invalid value"))
}
return nil
}
func getChiURLParam(r *http.Request, key string) (string, bool) {
if rctx := chi.RouteContext(r.Context()); rctx != nil {
for k := len(rctx.URLParams.Keys) - 1; k >= 0; k-- {
if rctx.URLParams.Keys[k] == key {
return rctx.URLParams.Values[k], true
}
}
}
return "", false
}