cloudflared-mirror/connection/connection.go

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package connection
import (
"fmt"
"io"
"net/http"
"strconv"
"strings"
"time"
"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
"github.com/google/uuid"
)
const LogFieldConnIndex = "connIndex"
type Config struct {
OriginProxy OriginProxy
GracePeriod time.Duration
ReplaceExisting bool
}
type NamedTunnelConfig struct {
Credentials Credentials
Client pogs.ClientInfo
}
// Credentials are stored in the credentials file and contain all info needed to run a tunnel.
type Credentials struct {
AccountTag string
TunnelSecret []byte
TunnelID uuid.UUID
TunnelName string
}
func (c *Credentials) Auth() pogs.TunnelAuth {
return pogs.TunnelAuth{
AccountTag: c.AccountTag,
TunnelSecret: c.TunnelSecret,
}
}
type ClassicTunnelConfig struct {
Hostname string
OriginCert []byte
// feature-flag to use new edge reconnect tokens
UseReconnectToken bool
}
func (c *ClassicTunnelConfig) IsTrialZone() bool {
return c.Hostname == ""
}
// Type indicates the connection type of the connection.
type Type int
const (
TypeWebsocket Type = iota
TypeTCP
TypeControlStream
TypeHTTP
)
// ShouldFlush returns whether this kind of connection should actively flush data
func (t Type) shouldFlush() bool {
switch t {
case TypeWebsocket, TypeTCP, TypeControlStream:
return true
default:
return false
}
}
func (t Type) String() string {
switch t {
case TypeWebsocket:
return "websocket"
case TypeTCP:
return "tcp"
case TypeControlStream:
return "control stream"
case TypeHTTP:
return "http"
default:
return fmt.Sprintf("Unknown Type %d", t)
}
}
type OriginProxy interface {
Proxy(w ResponseWriter, req *http.Request, sourceConnectionType Type) error
}
type ResponseWriter interface {
WriteRespHeaders(status int, header http.Header) error
WriteErrorResponse()
io.ReadWriter
}
type ConnectedFuse interface {
Connected()
IsConnected() bool
}
func IsServerSentEvent(headers http.Header) bool {
if contentType := headers.Get("content-type"); contentType != "" {
return strings.HasPrefix(strings.ToLower(contentType), "text/event-stream")
}
return false
}
func uint8ToString(input uint8) string {
return strconv.FormatUint(uint64(input), 10)
}