74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
package goSam
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import (
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"context"
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"fmt"
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"net"
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"strings"
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)
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// DialContext implements the net.DialContext function and can be used for http.Transport
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func (c *Client) DialContext(ctx context.Context, network, addr string) (net.Conn, error) {
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errCh := make(chan error, 1)
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connCh := make(chan net.Conn, 1)
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go func() {
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if conn, err := c.Dial(network, addr); err != nil {
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errCh <- err
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} else if ctx.Err() != nil {
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conn.Close()
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} else {
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connCh <- conn
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}
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}()
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select {
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case err := <-errCh:
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return nil, err
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case conn := <-connCh:
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return conn, nil
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case <-ctx.Done():
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return nil, ctx.Err()
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}
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}
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func (c Client) dialCheck(addr string) (int32, bool) {
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if c.lastaddr == "invalid" {
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fmt.Println("Preparing to dial new address.")
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return c.NewID(), true
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} else if c.lastaddr != addr {
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fmt.Println("Preparing to dial next new address.")
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return c.NewID(), true
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}
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return c.id, false
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}
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// Dial implements the net.Dial function and can be used for http.Transport
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func (c *Client) Dial(network, addr string) (net.Conn, error) {
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portIdx := strings.Index(addr, ":")
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if portIdx >= 0 {
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addr = addr[:portIdx]
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}
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addr, err := c.Lookup(addr)
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if err != nil {
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return nil, err
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}
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var test bool
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if c.id, test = c.dialCheck(addr); test == true {
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c.destination, err = c.CreateStreamSession(c.id, c.destination)
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if err != nil {
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return nil, err
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}
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c.lastaddr = addr
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}
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c, err = c.NewClient()
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if err != nil {
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return nil, err
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}
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err = c.StreamConnect(c.id, addr)
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if err != nil {
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return nil, err
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}
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return c.SamConn, nil
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}
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