Check for http status code.

httpupload.go

@@ -213,10 +213,14 @@ func httpUpload(client *xmpp.Client, jserver string, filePath string) string {
 		log.Fatal(err)
 	}
 	req.Header.Set("Content-Type", mimeType)
-	_, err = httpClient.Do(req)
+	resp, err := httpClient.Do(req)
 	if err != nil {
 		log.Fatal(err)
 	}
+	// Test for http status code "200 OK" or "201 Created"
+	if resp.StatusCode != 200 && resp.StatusCode != 201 {
+		log.Fatal("Http upload failed.")
+	}
 
 	// Return http link
 	return iqHttpUploadSlotXML.Get.URL