MDN may have intermittent access issues April 18 13:00 - April 19 01:00 UTC. See whistlepig.mozilla.org for all notifications.

mozilla
Your Search Results

    Post data to window

    This offers examples of sending POST data to the server and displaying the server response.

    Need more elaborate examples, examples of displaying the response in a new tab, in background tabs, and a link to using XMLHttpRequest for POST requests.

    Preprocessing POST data

    The aPostData argument of the (global) loadURI(), openDialog(), and (tab)browser.loadURIWithFlags() methods expects the POST data in the form of an nsIInputStream (because they eventually call nsIWebNavigation.loadURI()) while POST data can be created using nsIMIMEInputStream. Most of the time, POST data starts as a data string in the form of "name1=data1&name2=data2&...", so you must convert it before passing the data to one of the methods. Here is an example:

    var dataString = "name1=data1&name2=data2";
    
    // POST method requests must wrap the encoded text in a MIME
    // stream
    const Cc = Components.classes;
    const Ci = Components.interfaces;
    var stringStream = Cc["@mozilla.org/io/string-input-stream;1"].
                       createInstance(Ci.nsIStringInputStream);
    if ("data" in stringStream) // Gecko 1.9 or newer
      stringStream.data = dataString;
    else // 1.8 or older
      stringStream.setData(dataString, dataString.length);
    
    var postData = Cc["@mozilla.org/network/mime-input-stream;1"].
                   createInstance(Ci.nsIMIMEInputStream);
    postData.addHeader("Content-Type", "application/x-www-form-urlencoded");
    postData.addContentLength = true;
    postData.setData(stringStream);
    
    // postData is ready to be used as aPostData argument
    ...
    

    POSTing data to the current tab

    There is a convience method in global scope (in Firefox, chrome://browser/content/browser.js):

    loadURI(aURI, aReferrer, aPostData, aAllowThirdPartyFixup);
    

    POSTing data to a new window

    window.openDialog('chrome://browser/content', '_blank', 'all,dialog=no',
                      aURI, aFlags, aReferrer, aPostData);
    

    See also

    Document Tags and Contributors

    Last updated by: wbamberg,
    Hide Sidebar