| 27 | ) |
| 28 | |
| 29 | func ValidateHostname(hostname string) (string, error) { |
| 30 | if hostname == "" { |
| 31 | return "", nil |
| 32 | } |
| 33 | // users gives url(contains schema) not just hostname |
| 34 | if strings.Contains(hostname, ":") || strings.Contains(hostname, "%3A") { |
| 35 | unescapeHostname, err := url.PathUnescape(hostname) |
| 36 | if err != nil { |
| 37 | return "", fmt.Errorf("Hostname(actually a URL) %s has invalid escape characters %s", hostname, unescapeHostname) |
| 38 | } |
| 39 | hostnameToURL, err := url.Parse(unescapeHostname) |
| 40 | if err != nil { |
| 41 | return "", fmt.Errorf("Hostname(actually a URL) %s has invalid format %s", hostname, hostnameToURL) |
| 42 | } |
| 43 | asciiHostname, err := idna.ToASCII(hostnameToURL.Hostname()) |
| 44 | if err != nil { |
| 45 | return "", fmt.Errorf("Hostname(actually a URL) %s has invalid ASCII encdoing %s", hostname, asciiHostname) |
| 46 | } |
| 47 | return asciiHostname, nil |
| 48 | } |
| 49 | |
| 50 | asciiHostname, err := idna.ToASCII(hostname) |
| 51 | if err != nil { |
| 52 | return "", fmt.Errorf("Hostname %s has invalid ASCII encdoing %s", hostname, asciiHostname) |
| 53 | } |
| 54 | hostnameToURL, err := url.Parse(asciiHostname) |
| 55 | if err != nil { |
| 56 | return "", fmt.Errorf("Hostname %s is not valid", hostnameToURL) |
| 57 | } |
| 58 | return hostnameToURL.RequestURI(), nil |
| 59 | |
| 60 | } |
| 61 | |
| 62 | // ValidateUrl returns a validated version of `originUrl` with a scheme prepended (by default http://). |
| 63 | // Note: when originUrl contains a scheme, the path is removed: |