redirect the content to github in cnblogs

cnblogs.js

//console.log("hello")

if(document.getElementById("cnblogs_post_body") != null)
{
    var content = document.getElementById("cnblogs_post_body").textContent;
    console.log(content);
    
    if(content.indexOf("https://gist") == 0)
    {
        var xhr = new XMLHttpRequest();
        xhr.open("GET", content, true);
        xhr.onreadystatechange = function() {
          if (xhr.readyState == 4) {
            console.log("content:" + xhr.responseText);
            document.getElementById("cnblogs_post_body").innerHTML = xhr.responseText;
          }
        }
        xhr.send();
    }
}