frostfs-api-go/rpc/client/connect.go

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package client
import (
"context"
"errors"
"fmt"
"net"
"net/url"
"github.com/nspcc-dev/neofs-api-go/v2/rpc/grpc"
grpcstd "google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
func (c *Client) createGRPCClient() (err error) {
c.gRPCClientOnce.Do(func() {
if err = c.openGRPCConn(); err != nil {
return
}
c.gRPCClient = grpc.New(
grpc.WithClientConnection(c.conn),
grpc.WithRWTimeout(c.rwTimeout),
)
})
return
}
var errInvalidEndpoint = errors.New("invalid endpoint options")
func (c *Client) openGRPCConn() error {
if c.conn != nil {
return nil
}
if c.addr == "" {
return errInvalidEndpoint
}
var err error
var credOpt grpcstd.DialOption
if c.tlsCfg != nil {
creds := credentials.NewTLS(c.tlsCfg)
credOpt = grpcstd.WithTransportCredentials(creds)
} else {
credOpt = grpcstd.WithInsecure()
}
dialCtx, cancel := context.WithTimeout(context.Background(), c.dialTimeout)
c.conn, err = grpcstd.DialContext(dialCtx, c.addr, credOpt)
cancel()
return err
}
// ParseURI parses s as address and returns a host and a flag
// indicating that TLS is enabled. If multi-address is provided
// the argument is returned unchanged.
func ParseURI(s string) (string, bool, error) {
uri, err := url.ParseRequestURI(s)
if err != nil {
return s, false, nil
}
// check if passed string was parsed correctly
// URIs that do not start with a slash after the scheme are interpreted as:
// `scheme:opaque` => if `opaque` is not empty, then it is supposed that URI
// is in `host:port` format
if uri.Host == "" {
uri.Host = uri.Scheme
uri.Scheme = grpcScheme // assume GRPC by default
if uri.Opaque != "" {
uri.Host = net.JoinHostPort(uri.Host, uri.Opaque)
}
}
switch uri.Scheme {
case grpcTLSScheme, grpcScheme:
default:
return "", false, fmt.Errorf("unsupported scheme: %s", uri.Scheme)
}
return uri.Host, uri.Scheme == grpcTLSScheme, nil
}