ParseAddress parses an address string into a structured format with separate scheme, host, port, and path portions, as well as the original input string.
(str string)
| 371 | // ParseAddress parses an address string into a structured format with separate |
| 372 | // scheme, host, port, and path portions, as well as the original input string. |
| 373 | func ParseAddress(str string) (Address, error) { |
| 374 | const maxLen = 4096 |
| 375 | if len(str) > maxLen { |
| 376 | str = str[:maxLen] |
| 377 | } |
| 378 | remaining := strings.TrimSpace(str) |
| 379 | a := Address{Original: remaining} |
| 380 | |
| 381 | // extract scheme |
| 382 | splitScheme := strings.SplitN(remaining, "://", 2) |
| 383 | switch len(splitScheme) { |
| 384 | case 0: |
| 385 | return a, nil |
| 386 | case 1: |
| 387 | remaining = splitScheme[0] |
| 388 | case 2: |
| 389 | a.Scheme = splitScheme[0] |
| 390 | remaining = splitScheme[1] |
| 391 | } |
| 392 | |
| 393 | // extract host and port |
| 394 | hostSplit := strings.SplitN(remaining, "/", 2) |
| 395 | if len(hostSplit) > 0 { |
| 396 | host, port, err := net.SplitHostPort(hostSplit[0]) |
| 397 | if err != nil { |
| 398 | host, port, err = net.SplitHostPort(hostSplit[0] + ":") |
| 399 | if err != nil { |
| 400 | host = hostSplit[0] |
| 401 | } |
| 402 | } |
| 403 | a.Host = host |
| 404 | a.Port = port |
| 405 | } |
| 406 | if len(hostSplit) == 2 { |
| 407 | // all that remains is the path |
| 408 | a.Path = "/" + hostSplit[1] |
| 409 | } |
| 410 | |
| 411 | // make sure port is valid |
| 412 | if a.Port != "" { |
| 413 | if portNum, err := strconv.Atoi(a.Port); err != nil { |
| 414 | return Address{}, fmt.Errorf("invalid port '%s': %v", a.Port, err) |
| 415 | } else if portNum < 0 || portNum > 65535 { |
| 416 | return Address{}, fmt.Errorf("port %d is out of range", portNum) |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | return a, nil |
| 421 | } |
| 422 | |
| 423 | // String returns a human-readable form of a. It will |
| 424 | // be a cleaned-up and filled-out URL string. |
no outgoing calls