github.com/wlan0/docker@v1.5.0/pkg/parsers/parsers.go (about)

     1  package parsers
     2  
     3  import (
     4  	"fmt"
     5  	"strconv"
     6  	"strings"
     7  )
     8  
     9  // FIXME: Change this not to receive default value as parameter
    10  func ParseHost(defaultTCPAddr, defaultUnixAddr, addr string) (string, error) {
    11  	addr = strings.TrimSpace(addr)
    12  	if addr == "" {
    13  		addr = fmt.Sprintf("unix://%s", defaultUnixAddr)
    14  	}
    15  	addrParts := strings.Split(addr, "://")
    16  	if len(addrParts) == 1 {
    17  		addrParts = []string{"tcp", addrParts[0]}
    18  	}
    19  
    20  	switch addrParts[0] {
    21  	case "tcp":
    22  		return ParseTCPAddr(addrParts[1], defaultTCPAddr)
    23  	case "unix":
    24  		return ParseUnixAddr(addrParts[1], defaultUnixAddr)
    25  	case "fd":
    26  		return addr, nil
    27  	default:
    28  		return "", fmt.Errorf("Invalid bind address format: %s", addr)
    29  	}
    30  }
    31  
    32  func ParseUnixAddr(addr string, defaultAddr string) (string, error) {
    33  	addr = strings.TrimPrefix(addr, "unix://")
    34  	if strings.Contains(addr, "://") {
    35  		return "", fmt.Errorf("Invalid proto, expected unix: %s", addr)
    36  	}
    37  	if addr == "" {
    38  		addr = defaultAddr
    39  	}
    40  	return fmt.Sprintf("unix://%s", addr), nil
    41  }
    42  
    43  func ParseTCPAddr(addr string, defaultAddr string) (string, error) {
    44  	addr = strings.TrimPrefix(addr, "tcp://")
    45  	if strings.Contains(addr, "://") || addr == "" {
    46  		return "", fmt.Errorf("Invalid proto, expected tcp: %s", addr)
    47  	}
    48  
    49  	hostParts := strings.Split(addr, ":")
    50  	if len(hostParts) != 2 {
    51  		return "", fmt.Errorf("Invalid bind address format: %s", addr)
    52  	}
    53  	host := hostParts[0]
    54  	if host == "" {
    55  		host = defaultAddr
    56  	}
    57  
    58  	p, err := strconv.Atoi(hostParts[1])
    59  	if err != nil && p == 0 {
    60  		return "", fmt.Errorf("Invalid bind address format: %s", addr)
    61  	}
    62  	return fmt.Sprintf("tcp://%s:%d", host, p), nil
    63  }
    64  
    65  // Get a repos name and returns the right reposName + tag
    66  // The tag can be confusing because of a port in a repository name.
    67  //     Ex: localhost.localdomain:5000/samalba/hipache:latest
    68  func ParseRepositoryTag(repos string) (string, string) {
    69  	n := strings.LastIndex(repos, ":")
    70  	if n < 0 {
    71  		return repos, ""
    72  	}
    73  	if tag := repos[n+1:]; !strings.Contains(tag, "/") {
    74  		return repos[:n], tag
    75  	}
    76  	return repos, ""
    77  }
    78  
    79  func PartParser(template, data string) (map[string]string, error) {
    80  	// ip:public:private
    81  	var (
    82  		templateParts = strings.Split(template, ":")
    83  		parts         = strings.Split(data, ":")
    84  		out           = make(map[string]string, len(templateParts))
    85  	)
    86  	if len(parts) != len(templateParts) {
    87  		return nil, fmt.Errorf("Invalid format to parse.  %s should match template %s", data, template)
    88  	}
    89  
    90  	for i, t := range templateParts {
    91  		value := ""
    92  		if len(parts) > i {
    93  			value = parts[i]
    94  		}
    95  		out[t] = value
    96  	}
    97  	return out, nil
    98  }
    99  
   100  func ParseKeyValueOpt(opt string) (string, string, error) {
   101  	parts := strings.SplitN(opt, "=", 2)
   102  	if len(parts) != 2 {
   103  		return "", "", fmt.Errorf("Unable to parse key/value option: %s", opt)
   104  	}
   105  	return strings.TrimSpace(parts[0]), strings.TrimSpace(parts[1]), nil
   106  }
   107  
   108  func ParsePortRange(ports string) (uint64, uint64, error) {
   109  	if ports == "" {
   110  		return 0, 0, fmt.Errorf("Empty string specified for ports.")
   111  	}
   112  	if !strings.Contains(ports, "-") {
   113  		start, err := strconv.ParseUint(ports, 10, 16)
   114  		end := start
   115  		return start, end, err
   116  	}
   117  
   118  	parts := strings.Split(ports, "-")
   119  	start, err := strconv.ParseUint(parts[0], 10, 16)
   120  	if err != nil {
   121  		return 0, 0, err
   122  	}
   123  	end, err := strconv.ParseUint(parts[1], 10, 16)
   124  	if err != nil {
   125  		return 0, 0, err
   126  	}
   127  	if end < start {
   128  		return 0, 0, fmt.Errorf("Invalid range specified for the Port: %s", ports)
   129  	}
   130  	return start, end, nil
   131  }