73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
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package client
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"net/url"
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grpcstd "google.golang.org/grpc"
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)
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var errInvalidEndpoint = errors.New("invalid endpoint options")
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func (c *Client) openGRPCConn(ctx context.Context, dialer func(ctx context.Context, cc grpcstd.ClientConnInterface) error) error {
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if c.conn != nil {
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return nil
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}
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if c.addr == "" {
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return errInvalidEndpoint
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}
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var err error
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c.conn, err = grpcstd.NewClient(c.addr, c.grpcDialOpts...)
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if err != nil {
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return fmt.Errorf("gRPC new client: %w", err)
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}
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if dialer != nil {
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ctx, cancel := context.WithTimeout(ctx, c.dialTimeout)
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defer cancel()
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if err := dialer(ctx, c.conn); err != nil {
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_ = c.conn.Close()
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return fmt.Errorf("gRPC dial: %w", err)
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}
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}
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return nil
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}
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// ParseURI parses s as address and returns a host and a flag
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// indicating that TLS is enabled. If multi-address is provided
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// the argument is returned unchanged.
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func ParseURI(s string) (string, bool, error) {
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uri, err := url.ParseRequestURI(s)
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if err != nil {
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return s, false, nil
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}
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// check if passed string was parsed correctly
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// URIs that do not start with a slash after the scheme are interpreted as:
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// `scheme:opaque` => if `opaque` is not empty, then it is supposed that URI
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// is in `host:port` format
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if uri.Host == "" {
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uri.Host = uri.Scheme
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uri.Scheme = grpcScheme // assume GRPC by default
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if uri.Opaque != "" {
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uri.Host = net.JoinHostPort(uri.Host, uri.Opaque)
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}
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}
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switch uri.Scheme {
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case grpcTLSScheme, grpcScheme:
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default:
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return "", false, fmt.Errorf("unsupported scheme: %s", uri.Scheme)
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}
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return uri.Host, uri.Scheme == grpcTLSScheme, nil
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}
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