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twitterBot.go
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twitterBot.go
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// Simple Twitter bot for testing
// IBM Cloud Code Engine subscriptions.
// The bot runs as http server (Code Engine app) and receives
// POST requests on the "tweet" route. The POST requests are
// sent be the ping subscription at the configured times.
//
// Written by Henrik Loeser, 2021
package main
import (
"fmt"
"log"
"net/http"
"os"
"time"
"github.com/dghubble/go-twitter/twitter"
"github.com/dghubble/oauth1"
"github.com/labstack/echo/v4"
_ "github.com/joho/godotenv/autoload"
)
// Variables, taken from .env or K8s secrets
var (
TwitterAPIKey string = os.Getenv("TWITTER_APIKEY")
TwitterAPISecret string = os.Getenv("TWITTER_APIKEY_SECRET")
TwitterAccessToken string = os.Getenv("TWITTER_ACCESS_TOKEN")
TwitterAccessTokenSecret string = os.Getenv("TWITTER_ACCESS_TOKEN_SECRET")
SecretKey string = os.Getenv("SECRET_KEY")
)
// run the http server with two routes:
// 1) /: Hello world
// 2) /tweet: Send the Twitter status update (tweet)
func main() {
e := echo.New()
e.GET("/", func(c echo.Context) error {
return c.String(http.StatusOK, "Hello, World!")
})
e.POST("/tweet", tweet)
e.Logger.Fatal(e.Start(":8080"))
}
// Receive the request to tweet. First check for the passed secret.
// If it matches, proceed to set up the Twitter client and post the
// status update.
func tweet(c echo.Context) error {
PassedSecret := c.FormValue("SECRET_KEY")
if SecretKey == PassedSecret {
config := oauth1.NewConfig(TwitterAPIKey, TwitterAPISecret)
token := oauth1.NewToken(TwitterAccessToken, TwitterAccessTokenSecret)
// http.Client will automatically authorize Requests
httpClient := config.Client(oauth1.NoContext, token)
// twitter client
client := twitter.NewClient(httpClient)
message := fmt.Sprintf("I am running on #IBMCloud #CodeEngine using #Golang and testing #event subscriptions. The time is %s", time.Now())
tweet, _, err := client.Statuses.Update(message, nil)
if err != nil {
log.Fatal(TwitterAPIKey)
return err
}
// low level debugging for the logs... :)
fmt.Printf("STATUSES SHOW:\n%+v\n", tweet)
return c.String(http.StatusOK, "tweeted :)")
} else {
return c.String(http.StatusUnauthorized, "No matching secret provided")
}
}