100 lines
1.8 KiB
Go
100 lines
1.8 KiB
Go
package main
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import (
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"io"
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"log"
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"net/http"
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"time"
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evdev "github.com/gvalkov/golang-evdev"
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)
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const devname = "Drop The Key"
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const (
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B_1 uint16 = 59 + iota
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B_2
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B_3
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B_4
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B_5
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)
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var keyUrl = map[uint16]string{
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B_1: "http://atreides:5051/fromcur",
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B_2: "http://atreides:5051/fromcurto/hoke",
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B_3: "http://atreides:5051/fromcurto/rake",
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B_4: "http://atreides:5051/to/hoke",
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B_5: "http://atreides:5051/to/rake",
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}
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var showGrabFailMsg = true
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func getAndGrab() (keydev *evdev.InputDevice) {
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devices, _ := evdev.ListInputDevices("/dev/input/event*")
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for _, dev := range devices {
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if dev.Name == devname {
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keydev = dev
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}
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}
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if keydev == nil {
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return
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}
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err := keydev.Grab()
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if err != nil {
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if showGrabFailMsg {
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log.Print("found the device but failed to grab it")
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showGrabFailMsg = false
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}
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return nil
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}
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log.Println("grabbed the device")
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showGrabFailMsg = true
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return
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}
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func handle_event(ev *evdev.InputEvent) {
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if ev.Type != evdev.EV_KEY || ev.Value != 0 {
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return
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}
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if ev.Code < B_1 || ev.Code > B_5 {
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log.Print("ignoring unknown key", ev.Code)
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return
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}
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log.Printf("received code %d, hitting %s", ev.Code, keyUrl[ev.Code])
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resp, err := http.Get(keyUrl[ev.Code])
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if err != nil {
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log.Printf("error processing key %d (url %s): %s", ev.Code, keyUrl[ev.Code], err)
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return
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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log.Print("error reading response:", err)
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return
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}
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log.Print("output:\n", string(body))
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}
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func monitorForever(dev *evdev.InputDevice) {
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for {
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events, err := dev.Read()
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if err != nil {
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return
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}
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for i := range events {
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go handle_event(&events[i])
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}
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}
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}
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func main() {
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for {
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keydev := getAndGrab()
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if keydev == nil {
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time.Sleep(5 * time.Second)
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} else {
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monitorForever(keydev)
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log.Println("lost the device")
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}
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}
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}
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