change server address from string to a type

weed/pb/server_address.go

@@ -0,0 +1,130 @@
+package pb
+
+import (
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"net"
+	"strconv"
+	"strings"
+)
+
+type ServerAddress string
+type ServerAddresses string
+
+func NewServerAddress(host string, port int, grpcPort int) ServerAddress {
+	if grpcPort == port+10000 {
+		return ServerAddress(util.JoinHostPort(host, port))
+	}
+	return ServerAddress(util.JoinHostPort(host, port) + "." + strconv.Itoa(grpcPort))
+}
+
+func NewServerAddressWithGrpcPort(address string, grpcPort int) ServerAddress {
+	if grpcPort == 0 {
+		return ServerAddress(address)
+	}
+	_, port, _ := hostAndPort(address)
+	if uint64(grpcPort) == port+10000 {
+		return ServerAddress(address)
+	}
+	return ServerAddress(address + "." + strconv.Itoa(grpcPort))
+}
+
+func NewServerAddressFromDataNode(dn *master_pb.DataNodeInfo) ServerAddress {
+	return NewServerAddressWithGrpcPort(dn.Id, int(dn.GrpcPort))
+}
+
+func NewServerAddressFromLocation(dn *master_pb.Location) ServerAddress {
+	return NewServerAddressWithGrpcPort(dn.Url, int(dn.GrpcPort))
+}
+
+func (sa ServerAddress) String() string {
+	return sa.ToHttpAddress()
+}
+
+func (sa ServerAddress) ToHttpAddress() string {
+	portsSepIndex := strings.LastIndex(string(sa), ":")
+	if portsSepIndex < 0 {
+		return string(sa)
+	}
+	if portsSepIndex+1 >= len(sa) {
+		return string(sa)
+	}
+	ports := string(sa[portsSepIndex+1:])
+	sepIndex := strings.LastIndex(string(ports), ".")
+	if sepIndex >= 0 {
+		host := string(sa[0:portsSepIndex])
+		return net.JoinHostPort(host, ports[0:sepIndex])
+	}
+	return string(sa)
+}
+
+func (sa ServerAddress) ToGrpcAddress() string {
+	portsSepIndex := strings.LastIndex(string(sa), ":")
+	if portsSepIndex < 0 {
+		return string(sa)
+	}
+	if portsSepIndex+1 >= len(sa) {
+		return string(sa)
+	}
+	ports := string(sa[portsSepIndex+1:])
+	sepIndex := strings.LastIndex(ports, ".")
+	if sepIndex >= 0 {
+		host := string(sa[0:portsSepIndex])
+		return net.JoinHostPort(host, ports[sepIndex+1:])
+	}
+	return ServerToGrpcAddress(string(sa))
+}
+
+func (sa ServerAddresses) ToAddresses() (addresses []ServerAddress) {
+	parts := strings.Split(string(sa), ",")
+	for _, address := range parts {
+		if address != "" {
+			addresses = append(addresses, ServerAddress(address))
+		}
+	}
+	return
+}
+
+func (sa ServerAddresses) ToAddressStrings() (addresses []string) {
+	parts := strings.Split(string(sa), ",")
+	for _, address := range parts {
+		addresses = append(addresses, address)
+	}
+	return
+}
+
+func ToAddressStrings(addresses []ServerAddress) []string {
+	var strings []string
+	for _, addr := range addresses {
+		strings = append(strings, string(addr))
+	}
+	return strings
+}
+func FromAddressStrings(strings []string) []ServerAddress {
+	var addresses []ServerAddress
+	for _, addr := range strings {
+		addresses = append(addresses, ServerAddress(addr))
+	}
+	return addresses
+}
+
+func ParseUrl(input string) (address ServerAddress, path string, err error) {
+	if !strings.HasPrefix(input, "http://") {
+		return "", "", fmt.Errorf("url %s needs prefix 'http://'", input)
+	}
+	input = input[7:]
+	pathSeparatorIndex := strings.Index(input, "/")
+	hostAndPorts := input
+	if pathSeparatorIndex > 0 {
+		path = input[pathSeparatorIndex:]
+		hostAndPorts = input[0:pathSeparatorIndex]
+	}
+	commaSeparatorIndex := strings.Index(input, ":")
+	if commaSeparatorIndex < 0 {
+		err = fmt.Errorf("port should be specified in %s", input)
+		return
+	}
+	address = ServerAddress(hostAndPorts)
+	return
+}