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|
package client
import (
"fmt"
"net"
"time"
"google.golang.org/grpc/credentials"
"net/url"
"google.golang.org/grpc"
)
// DefaultDialOpts hold the default DialOptions for connection to Gitaly over UNIX-socket
var DefaultDialOpts = []grpc.DialOption{}
type connectionType int
const (
invalidConnection connectionType = iota
tcpConnection
tlsConnection
unixConnection
)
// Dial gitaly
func Dial(rawAddress string, connOpts []grpc.DialOption) (*grpc.ClientConn, error) {
var canonicalAddress string
var err error
switch getConnectionType(rawAddress) {
case invalidConnection:
return nil, fmt.Errorf("invalid connection string: %s", rawAddress)
case tlsConnection:
canonicalAddress, err = extractHostFromRemoteURL(rawAddress) // Ensure the form: "host:port" ...
if err != nil {
return nil, err
}
certPool, err := systemCertPool()
if err != nil {
return nil, err
}
creds := credentials.NewClientTLSFromCert(certPool, "")
connOpts = append(connOpts, grpc.WithTransportCredentials(creds))
case tcpConnection:
canonicalAddress, err = extractHostFromRemoteURL(rawAddress) // Ensure the form: "host:port" ...
if err != nil {
return nil, err
}
connOpts = append(connOpts, grpc.WithInsecure())
case unixConnection:
canonicalAddress = rawAddress // This will be overriden by the custom dialer...
connOpts = append(
connOpts,
grpc.WithInsecure(),
grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
path, err := extractPathFromSocketURL(addr)
if err != nil {
return nil, err
}
return net.DialTimeout("unix", path, timeout)
}),
)
}
conn, err := grpc.Dial(canonicalAddress, connOpts...)
if err != nil {
return nil, err
}
return conn, nil
}
func getConnectionType(rawAddress string) connectionType {
u, err := url.Parse(rawAddress)
if err != nil {
return invalidConnection
}
switch u.Scheme {
case "tls":
return tlsConnection
case "unix":
return unixConnection
case "tcp":
return tcpConnection
default:
return invalidConnection
}
}
|
