get join url from a greenlight

main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"net/url"
+	"os"
+
+	"github.com/PuerkitoBio/goquery"
+)
+
+func main() {
+	bbbName := "bbbBot"
+	bbbURL, _ := url.Parse(os.Args[1])
+
+	res, err := http.Get(bbbURL.String())
+	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)
+	}
+	form := doc.Find("form")
+	authToken, ok := form.Find("input[name='authenticity_token']").Attr("value")
+	if !ok {
+		log.Fatalln("'authenticity_token' not found")
+	}
+	res.Body.Close()
+	// ----
+	res, err = http.PostForm(bbbURL.String(), url.Values{
+		"authenticity_token":                      {authToken},
+		fmt.Sprintf("%s[join_name]", bbbURL.Path): {bbbName},
+	})
+	//defer res.Body.Close()
+	if res.StatusCode != 200 {
+		log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
+	}
+	log.Printf("%v", res.Request.Header.Get("Referer"))
+
+	/* not needed ... websocket
+	doc, err = goquery.NewDocumentFromReader(res.Body)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Println(doc.Html())
+	*/
+}