cloudflare/cloudflared
Publicmirrored from https://github.com/cloudflare/cloudflaredAvailable
connection/connection.go
113lines · modecode
| 1 | package connection |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "io" |
| 6 | "net/http" |
| 7 | "strconv" |
| 8 | "strings" |
| 9 | "time" |
| 10 | |
| 11 | "github.com/cloudflare/cloudflared/tunnelrpc/pogs" |
| 12 | "github.com/google/uuid" |
| 13 | ) |
| 14 | |
| 15 | const LogFieldConnIndex = "connIndex" |
| 16 | |
| 17 | type Config struct { |
| 18 | OriginProxy OriginProxy |
| 19 | GracePeriod time.Duration |
| 20 | ReplaceExisting bool |
| 21 | } |
| 22 | |
| 23 | type NamedTunnelConfig struct { |
| 24 | Credentials Credentials |
| 25 | Client pogs.ClientInfo |
| 26 | } |
| 27 | |
| 28 | // Credentials are stored in the credentials file and contain all info needed to run a tunnel. |
| 29 | type Credentials struct { |
| 30 | AccountTag string |
| 31 | TunnelSecret []byte |
| 32 | TunnelID uuid.UUID |
| 33 | TunnelName string |
| 34 | } |
| 35 | |
| 36 | func (c *Credentials) Auth() pogs.TunnelAuth { |
| 37 | return pogs.TunnelAuth{ |
| 38 | AccountTag: c.AccountTag, |
| 39 | TunnelSecret: c.TunnelSecret, |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | type ClassicTunnelConfig struct { |
| 44 | Hostname string |
| 45 | OriginCert []byte |
| 46 | // feature-flag to use new edge reconnect tokens |
| 47 | UseReconnectToken bool |
| 48 | } |
| 49 | |
| 50 | func (c *ClassicTunnelConfig) IsTrialZone() bool { |
| 51 | return c.Hostname == "" |
| 52 | } |
| 53 | |
| 54 | // Type indicates the connection type of the connection. |
| 55 | type Type int |
| 56 | |
| 57 | const ( |
| 58 | TypeWebsocket Type = iota |
| 59 | TypeTCP |
| 60 | TypeControlStream |
| 61 | TypeHTTP |
| 62 | ) |
| 63 | |
| 64 | // ShouldFlush returns whether this kind of connection should actively flush data |
| 65 | func (t Type) shouldFlush() bool { |
| 66 | switch t { |
| 67 | case TypeWebsocket, TypeTCP, TypeControlStream: |
| 68 | return true |
| 69 | default: |
| 70 | return false |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | func (t Type) String() string { |
| 75 | switch t { |
| 76 | case TypeWebsocket: |
| 77 | return "websocket" |
| 78 | case TypeTCP: |
| 79 | return "tcp" |
| 80 | case TypeControlStream: |
| 81 | return "control stream" |
| 82 | case TypeHTTP: |
| 83 | return "http" |
| 84 | default: |
| 85 | return fmt.Sprintf("Unknown Type %d", t) |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | type OriginProxy interface { |
| 90 | // If Proxy returns an error, the caller is responsible for writing the error status to ResponseWriter |
| 91 | Proxy(w ResponseWriter, req *http.Request, sourceConnectionType Type) error |
| 92 | } |
| 93 | |
| 94 | type ResponseWriter interface { |
| 95 | WriteRespHeaders(status int, header http.Header) error |
| 96 | io.Writer |
| 97 | } |
| 98 | |
| 99 | type ConnectedFuse interface { |
| 100 | Connected() |
| 101 | IsConnected() bool |
| 102 | } |
| 103 | |
| 104 | func IsServerSentEvent(headers http.Header) bool { |
| 105 | if contentType := headers.Get("content-type"); contentType != "" { |
| 106 | return strings.HasPrefix(strings.ToLower(contentType), "text/event-stream") |
| 107 | } |
| 108 | return false |
| 109 | } |
| 110 | |
| 111 | func uint8ToString(input uint8) string { |
| 112 | return strconv.FormatUint(uint64(input), 10) |
| 113 | } |
| 114 | |