130 lines
3.5 KiB
Go
130 lines
3.5 KiB
Go
/*
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Copyright 2019 Stellar Project
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in the
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Software without restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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and to permit persons to whom the Software is furnished to do so, subject to the
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following conditions:
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The above copyright notice and this permission notice shall be included in all copies
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or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package client
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import (
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"context"
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"crypto/tls"
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"net"
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"net/url"
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"time"
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"github.com/sirupsen/logrus"
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"github.com/stellarproject/heimdall"
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v1 "github.com/stellarproject/heimdall/api/v1"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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)
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// Client is the Atlas client
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type Client struct {
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id string
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conn *grpc.ClientConn
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heimdallClient v1.HeimdallClient
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}
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// NewClient returns a new Atlas client configured with the specified address and options
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func NewClient(id, addr string, opts ...grpc.DialOption) (*Client, error) {
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
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defer cancel()
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if len(opts) == 0 {
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opts = []grpc.DialOption{
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grpc.WithInsecure(),
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grpc.WithBlock(),
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}
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}
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u, err := url.Parse(addr)
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if err != nil {
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return nil, err
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}
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endpoint := u.Host
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if u.Scheme == "unix" {
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endpoint = u.Path
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opts = append(opts, grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
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return net.DialTimeout("unix", addr, timeout)
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}))
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}
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opts = append(opts, grpc.WithDefaultCallOptions(
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grpc.WaitForReady(true),
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))
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c, err := grpc.DialContext(ctx,
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endpoint,
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opts...,
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)
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if err != nil {
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return nil, err
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}
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client := &Client{
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id: id,
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conn: c,
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heimdallClient: v1.NewHeimdallClient(c),
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}
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return client, nil
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}
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// Conn returns the current configured client connection
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func (c *Client) Conn() *grpc.ClientConn {
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return c.conn
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}
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// Close closes the underlying GRPC client
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func (c *Client) Close() error {
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return c.conn.Close()
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}
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// DialOptionsFromConfig returns dial options configured from a Stellar config
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func DialOptionsFromConfig(cfg *heimdall.Config) ([]grpc.DialOption, error) {
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opts := []grpc.DialOption{}
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if cfg.TLSClientCertificate != "" {
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logrus.WithField("cert", cfg.TLSClientCertificate)
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var creds credentials.TransportCredentials
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if cfg.TLSClientKey != "" {
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logrus.WithField("key", cfg.TLSClientKey)
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cert, err := tls.LoadX509KeyPair(cfg.TLSClientCertificate, cfg.TLSClientKey)
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if err != nil {
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return nil, err
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}
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creds = credentials.NewTLS(&tls.Config{
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Certificates: []tls.Certificate{cert},
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InsecureSkipVerify: cfg.TLSInsecureSkipVerify,
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})
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} else {
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c, err := credentials.NewClientTLSFromFile(cfg.TLSClientCertificate, "")
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if err != nil {
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return nil, err
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}
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creds = c
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}
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opts = append(opts, grpc.WithTransportCredentials(creds))
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} else {
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opts = append(opts, grpc.WithInsecure())
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}
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return opts, nil
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}
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