Webhooks and Google Chat
This post will show you how to create a Go binary that can POST messages to a Google Chat channel, a.k.a Google Space.
Step 1.
Create a channel and create the Webhook endpoint. To do that follow this documentation from Google:
Build a Google Chat app as a webhook | Google for Developers
Step 2.
Create the Go application that will do the POST request with your message against the Webhook URL.
package main
import (
"bytes"
"encoding/json"
"fmt"
"github.com/joho/godotenv"
"io"
"net/http"
"os"
)
func main() {
if len(os.Args) < 2 {
fmt.Println("Usage: ./go-google-space <message>")
return
}
userMessage := os.Args[1]
client := &http.Client{}
err := godotenv.Load()
if err != nil {
fmt.Println("Error loading .env file")
}
chatSpaceID := os.Getenv("SPACE_ID")
key := os.Getenv("KEY")
token := os.Getenv("TOKEN")
url := fmt.Sprintf("https://chat.googleapis.com/v1/spaces/%s/messages?key=%s&token=%s", chatSpaceID, key, token)
message := map[string]string{"text": userMessage}
messageJson, err := json.Marshal(message)
if err != nil {
fmt.Println("Error marshalling message")
}
req, err := http.NewRequest("POST", url, bytes.NewBuffer(messageJson))
if err != nil {
fmt.Println("Error creating request")
return
}
req.Header.Add("Content-Type", "application/json; charset=UTF-8")
resp, err := client.Do(req)
if err != nil {
fmt.Println("Error sending request")
return
}
defer func(Body io.ReadCloser) {
err := Body.Close()
if err != nil {
fmt.Println("Error closing response body")
}
}(resp.Body)
}
main.go
Compile and run with:
go build -o go-google-space main.go
./go-google-space "Hello from Go!"Make sure you have the .env file in the same directory as the binary, with the values from the generated Webhook URL, It should look like this:
SPACE_ID="<SPACEID FROM WEBHOOK URL>"
KEY="<KEY FROM WEBHOOK URL>"
TOKEN="<TOKEN FROM WEBHOOK URL>".env file
For more info check the repository at the link below:
go-google-space
go-google-space
scriptNET-STHLM
Why did i create this? IDK why 😃
