Function rewriteURL

middleware/middleware.go:51–84

(rewriteRegex map[*regexp.Regexp]string, req *http.Request)

}

func rewriteURL(rewriteRegex map[*regexp.Regexp]string, req *http.Request) error {
	if len(rewriteRegex) == 0 {
		return nil
	}

	// Depending how HTTP request is sent RequestURI could contain Scheme://Host/path or be just /path.
	// We only want to use path part for rewriting and therefore trim prefix if it exists
	rawURI := req.RequestURI
	if rawURI != "" && rawURI[0] != '/' {
		prefix := ""
		if req.URL.Scheme != "" {
			prefix = req.URL.Scheme + "://"
		}
		if req.URL.Host != "" {
			prefix += req.URL.Host // host or host:port
		}
		if prefix != "" {
			rawURI = strings.TrimPrefix(rawURI, prefix)
		}
	}

	for k, v := range rewriteRegex {
		if replacer := captureTokens(k, rawURI); replacer != nil {
			url, err := req.URL.Parse(replacer.Replace(v))
			if err != nil {
				return err
			}
			req.URL = url

			return nil // rewrite only once
		}
	}
	return nil
}

// DefaultSkipper returns false which processes the middleware.
func DefaultSkipper(c *echo.Context) bool {