How to paste text in Pastebin using JavaScript

Question

I'm using Tampermonkey (the same as Greasemonkey, but for Chrome) to make a script. The idea is to paste the text I write into Pastebin. The text was written in other website. I saw I can do it using GM_xmlhttpRequest, but it doesn't work. This is my code:

    var charac = new Array(50);
    var i =0
function callkeydownhandler(evnt) {

   var ev = (evnt) ? evnt : event;
   var code=(ev.which) ? ev.which : event.keyCode;
   charac[i]= code;
        i++;
}
if (window.document.addEventListener) {
   window.document.addEventListener("keydown", callkeydownhandler, false);
} else {
   window.document.attachEvent("onkeydown", callkeydownhandler);
}

GM_xmlhttpRequest({
  method: "POST",
  url: "http://pastebin.com/post.php",
  data: "user=mysuser&password=mypassword", //as you can imagine I use my credentials
  headers: {
    "Content-Type": "application/x-www-form-urlencoded"
  },
  onload: function(response) {
    alert("posted");
    document.getElementById("paste_code").value+=charac[i];
    document.getElementById("submit").click();
  }
});

I'm sure the two last lines are not working properly, but I don't know why. The first function works perfect.

What am I doing bad? How can I fix it?

Thank you! =)

Answer 1

I developed a simple API that does exactly what you want.

Includes : Persist BETA

Pastebin has an API, but it currently doesn't support editing posts.
That is why I needed to create two different "services" specific to pastebin... PASTEBIN and PASTEBIN2

If you don't need editing, use PASTEBIN. Otherwise, use PASTEBIN2.

The first thing you will need is an Unique Developer API Key.
Then you will need an User API Key.

Here are some examples of usage of my script:

Creating a new post

Persist.write({
    service : "PASTEBIN",
    value   : "...",
    data    : {
        api_dev_key     : "...",
        api_user_key    : "...",
    },
    onload  : function (result) {
        alert("http://pastebin.com/" + result.key);
    }
});

Editing an existing post

Persist.write({
    service : "PASTEBIN2",
    mode    : -1,   // prepend
    key     : "..."
    value   : "...",
    data    : {
        api_dev_key     : "...",
        api_user_key    : "...",
    },
    onload  : function (result) {
        alert("Post #" + result.key + "\nNew value: " + result.value);
    }
});

Reading an existing post

Persist.read({
    service : "PASTEBIN",
    key     : "..."
    data    : {
        api_dev_key     : "...",
        api_user_key    : "...",
    },
    onload  : function (result) {
        alert("\nValue: " + result.value);
    }
});