cloudflare/cloudflared
Publicmirrored from https://github.com/cloudflare/cloudflaredAvailable
connection/observer.go
99lines · modecode
| 1 | package connection |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "net/url" |
| 6 | "strings" |
| 7 | |
| 8 | "github.com/cloudflare/cloudflared/cmd/cloudflared/ui" |
| 9 | "github.com/cloudflare/cloudflared/logger" |
| 10 | tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs" |
| 11 | ) |
| 12 | |
| 13 | type Observer struct { |
| 14 | logger.Service |
| 15 | metrics *tunnelMetrics |
| 16 | tunnelEventChan chan<- ui.TunnelEvent |
| 17 | } |
| 18 | |
| 19 | func NewObserver(logger logger.Service, tunnelEventChan chan<- ui.TunnelEvent, protocol Protocol) *Observer { |
| 20 | return &Observer{ |
| 21 | logger, |
| 22 | newTunnelMetrics(protocol), |
| 23 | tunnelEventChan, |
| 24 | } |
| 25 | } |
| 26 | |
| 27 | func (o *Observer) logServerInfo(connectionID uint8, location, msg string) { |
| 28 | // If launch-ui flag is set, send connect msg |
| 29 | if o.tunnelEventChan != nil { |
| 30 | o.tunnelEventChan <- ui.TunnelEvent{Index: connectionID, EventType: ui.Connected, Location: location} |
| 31 | } |
| 32 | o.Infof(msg) |
| 33 | o.metrics.registerServerLocation(uint8ToString(connectionID), location) |
| 34 | } |
| 35 | |
| 36 | func (o *Observer) logTrialHostname(registration *tunnelpogs.TunnelRegistration) error { |
| 37 | // Print out the user's trial zone URL in a nice box (if they requested and got one and UI flag is not set) |
| 38 | if o.tunnelEventChan == nil { |
| 39 | if registrationURL, err := url.Parse(registration.Url); err == nil { |
| 40 | for _, line := range asciiBox(trialZoneMsg(registrationURL.String()), 2) { |
| 41 | o.Info(line) |
| 42 | } |
| 43 | } else { |
| 44 | o.Error("Failed to connect tunnel, please try again.") |
| 45 | return fmt.Errorf("empty URL in response from Cloudflare edge") |
| 46 | } |
| 47 | } |
| 48 | return nil |
| 49 | } |
| 50 | |
| 51 | // Print out the given lines in a nice ASCII box. |
| 52 | func asciiBox(lines []string, padding int) (box []string) { |
| 53 | maxLen := maxLen(lines) |
| 54 | spacer := strings.Repeat(" ", padding) |
| 55 | |
| 56 | border := "+" + strings.Repeat("-", maxLen+(padding*2)) + "+" |
| 57 | |
| 58 | box = append(box, border) |
| 59 | for _, line := range lines { |
| 60 | box = append(box, "|"+spacer+line+strings.Repeat(" ", maxLen-len(line))+spacer+"|") |
| 61 | } |
| 62 | box = append(box, border) |
| 63 | return |
| 64 | } |
| 65 | |
| 66 | func maxLen(lines []string) int { |
| 67 | max := 0 |
| 68 | for _, line := range lines { |
| 69 | if len(line) > max { |
| 70 | max = len(line) |
| 71 | } |
| 72 | } |
| 73 | return max |
| 74 | } |
| 75 | |
| 76 | func trialZoneMsg(url string) []string { |
| 77 | return []string{ |
| 78 | "Your free tunnel has started! Visit it:", |
| 79 | " " + url, |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | func (o *Observer) sendRegisteringEvent() { |
| 84 | if o.tunnelEventChan != nil { |
| 85 | o.tunnelEventChan <- ui.TunnelEvent{EventType: ui.RegisteringTunnel} |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | func (o *Observer) sendConnectedEvent(connIndex uint8, location string) { |
| 90 | if o.tunnelEventChan != nil { |
| 91 | o.tunnelEventChan <- ui.TunnelEvent{Index: connIndex, EventType: ui.Connected, Location: location} |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | func (o *Observer) sendURL(url string) { |
| 96 | if o.tunnelEventChan != nil { |
| 97 | o.tunnelEventChan <- ui.TunnelEvent{EventType: ui.SetUrl, Url: url} |
| 98 | } |
| 99 | } |