/
main.go
56 lines (52 loc) · 1.38 KB
/
main.go
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package main
import (
"crypto/md5"
"fmt"
"log"
"net/http"
"os"
"strconv"
"time"
"github.com/PuerkitoBio/goquery"
)
func getUpdate(url, selector string) (hash, text string) {
res, err := http.Get(url)
if err != nil {
log.Fatal(err)
}
defer res.Body.Close()
if res.StatusCode != 200 {
log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
}
doc, err := goquery.NewDocumentFromReader(res.Body)
if err != nil {
log.Fatal(err)
}
text = doc.Find(selector).Text()
hash = fmt.Sprintf("%x", md5.Sum([]byte(text)))
return
}
func main() {
url := os.Getenv("URL")
selector := os.Getenv("SELECTOR")
interval := os.Getenv("INTERVAL")
webhook := os.Getenv("WEBHOOK")
intervalInt, err := strconv.Atoi(interval)
if err != nil {
log.Fatalf("interval can not be convert to int, error: %v", err)
}
log.Printf("config loaded successfully.\nurl: %s\ncss selector: %s\ninterval: %d minute\nwebhook: %s",
url, selector, intervalInt, webhook)
lastHash, lastText := getUpdate(url, selector)
log.Printf("target inited, %s\n==========\n||%s||\n==========", lastHash, lastText)
for {
time.Sleep(time.Minute * time.Duration(intervalInt))
thisHash, thisText := getUpdate(url, selector)
if thisHash != lastHash {
log.Printf("target changed, %s\n==========\n||%s||\n==========", thisHash, thisText)
lastHash = thisHash
lastText = thisText
http.Get(webhook)
}
}
}