keysnail-tweet.js

key.setViewKey(['C-c', 't'], function (aEvent, aArg) {
    prompt.read("tweet:", function (aTweet) {
        if (aTweet == null)
            return;

        // get user name / password
        var passwordManager = Cc["@mozilla.org/login-manager;1"]
            .getService(Ci.nsILoginManager);
        var logins = passwordManager
            .findLogins({}, "http://twitter.com", "https://twitter.com", null);
        var username = "", password = "";
        if (logins.length)
            [username, password] = [logins[0].username, logins[0].password];

        // create request
        var xhr = new XMLHttpRequest();

        // pretty notification
        var alertsService = Cc["@mozilla.org/alerts-service;1"].getService(Ci.nsIAlertsService);

        xhr.onreadystatechange = function (aEvent) {
            if (xhr.readyState == 4) {
                if (xhr.status != 200) {
                    alertsService.showAlertNotification(null, "I'm sorry...", "Failed to tweet",
                                                        false, "", null);
                    return;
                }
                // get safe eval for JSON parsing
                var evalFunc = window.eval;
                try {
                    var sandbox = new Components.utils.Sandbox("about:blank");
                    if (Components.utils.evalInSandbox("true", sandbox) === true) {
                        evalFunc = function(text) {
                            return Components.utils.evalInSandbox(text, sandbox);
                        };
                    }
                } catch (e) {}

                var status    = evalFunc("(" + xhr.responseText + ")");
                var icon_url  = status.user.profile_image_url;
                var user_name = status.user.name;
                var message   = status.text;

                alertsService.showAlertNotification(icon_url, user_name, message,
                                                    false, "", null);
            }
        };

        // 3rd value true means Asynchronous connection
        xhr.open("POST", "http://twitter.com/statuses/update.json", true, username, password);
        xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        xhr.setRequestHeader("X-Twitter-Client", "KeySnail");
        xhr.setRequestHeader("X-Twitter-Client-Version", "0.1");
        xhr.send("status=" + aTweet);
    });
}, 'Tweet!');