A simple package for communicating with Amazon’s HTTP/2 API for AVS.
Requires Go 1.8 or later.
package main
import (
"fmt"
"io/ioutil"
"os"
"github.com/fika-io/go-avs"
)
// Put your access token below.
const ACCESS_TOKEN = "YOUR ACCESS TOKEN"
func main() {
// Record your request into request.wav.
audio, _ := os.Open("./request.wav")
response, err := avs.PostRecognize(ACCESS_TOKEN, "abc123", "abc123dialog", audio)
if err != nil {
fmt.Printf("Failed to call AVS: %v\n", err)
return
}
// AVS might not return any directives in some cases.
if len(response.Directives) == 0 {
fmt.Println("Alexa had nothing to say.")
return
}
// A response can have multiple directives in the response.
for _, directive := range response.Directives {
switch d := directive.Typed().(type) {
case *avs.ExpectSpeech:
fmt.Printf("Alexa wants you to speak within %s!\n", d.Timeout())
case *avs.Play:
// The Play directive can point to attached audio or remote streams.
if cid := d.Payload.AudioItem.Stream.ContentId(); cid != "" {
save(response, cid)
} else {
fmt.Println("Remote stream:", d.Payload.AudioItem.Stream.URL)
}
case *avs.Speak:
// The Speak directive always points to attached audio.
save(response, d.ContentId())
default:
fmt.Println("No code to handle directive:", d)
}
}
}
var savedFiles = 0
// Function that saves an audio file to disk.
func save(resp *avs.Response, cid string) {
savedFiles++
filename := fmt.Sprintf("./response%d.mp3", savedFiles)
ioutil.WriteFile(filename, resp.Content[cid], 0666)
fmt.Println("Saved Alexa’s response to", filename)
}
You can open a downchannel with the CreateDownchannel
method. It's implemented
as a read-only channel of Message
pointers.
package main
import (
"fmt"
"github.com/fika-io/go-avs"
)
// Put your access token below.
const ACCESS_TOKEN = "YOUR ACCESS TOKEN"
func main() {
directives, err := avs.CreateDownchannel(ACCESS_TOKEN)
if err != nil {
fmt.Printf("Failed to open downchannel: %v\n", err)
return
}
// Wait for directives to come in on the downchannel.
for directive := range directives {
switch d := directive.Typed().(type) {
case *avs.DeleteAlert:
fmt.Println("Unset alert:", d.Payload.Token)
case *avs.SetAlert:
fmt.Printf("Set alert %s (%s) for %s\n", d.Payload.Token, d.Payload.Type, d.Payload.ScheduledTime)
default:
fmt.Println("No code to handle directive:", d)
}
}
fmt.Println("Downchannel closed. Bye!")
}