Question

So I’ve got this code for a drag and drog file uploader to PHP via ajax, but apparently my web host doesn’t have ajax. Is there any way I can do it without ajax? Specifically I am referring to the UploadFile function, towards the end, after the progress bar parts (which don’t seem to work either… )

(function() {

// getElementById
function $id(id) {
    return document.getElementById(id);
}


// output information
function Output(msg) {
    var m = $id("messages");
    m.innerHTML = msg + m.innerHTML;
}


// file drag hover
function FileDragHover(e) {
    e.stopPropagation();
    e.preventDefault();
    e.target.className = (e.type == "dragover" ? "hover" : "");
}


// file selection
function FileSelectHandler(e) {

    // cancel event and hover styling
    FileDragHover(e);

    // fetch FileList object
    var files = e.target.files || e.dataTransfer.files;

    // process all File objects
    for (var i = 0, f; f = files[i]; i++) {
        ParseFile(f);
        UploadFile(f);
    }

}


//upload images
function UploadFile(file) {


    var xhr = new XMLHttpRequest();
    if ( xhr.upload && file.type == "image/jpeg" || file.type == "image/gif" || file.type == "image/jpg" || file.type == "image/png" && file.size <= $id("MAX_FILE_SIZE").value
) {

        //create progress bar
        var o = $id("progress");
        var progress = o.appendChild(document.createElement("p"));
        progress.appendChild(document.createTextNode("upload " + file.name));


        //progress bar
        xhr.upload.addEventListener("progress", function(e) {
            var pc = parseInt(100 - (e.loaded / e.total * 100));
            progress.style.backgroundPosition = pc + "% 0";
        }, true);


        //file received/failed
        xhr.onreadystatechange = function(e) {
            if (xhr.readyState == 4) {
                progress.className = (xhr.status == 200 ? "success" : "failure");
            }
        };

        //start upload
        xhr.open("POST", $is("upload").action, true);
        xhr.setRequestHeader("X_FILENAME", file.name);
        xhr.setRequestHeader("Content-type", file.type);
        xhr.send(file);

    }



}


// initialize
function Init() {

    var fileselect = $id("fileselect"),
        filedrag = $id("filedrag"),
        submitbutton = $id("submitbutton");

    // file select
    fileselect.addEventListener("change", FileSelectHandler, false);

    // is XHR2 available?
    var xhr = new XMLHttpRequest();
    if (xhr.upload) {

        // file drop
        filedrag.addEventListener("dragover", FileDragHover, false);
        filedrag.addEventListener("dragleave", FileDragHover, false);
        filedrag.addEventListener("drop", FileSelectHandler, false);
        filedrag.style.display = "block";

        // remove submit button
        submitbutton.style.display = "block";
    }

}

// output file information
function ParseFile(file) {

    Output(
        "<p>File information: <strong>" + file.name +
        "</strong> type: <strong>" + file.type +
        "</strong> size: <strong>" + file.size +
        "</strong> bytes</p>"
    );

    // display an image
    if (file.type.indexOf("image") == 0) {
        var reader = new FileReader();
        reader.onload = function(e) {
            Output(
                "<p><strong>" + file.name + ":</strong><br />" +
                '<img src="' + e.target.result + '" /></p>'
            );
        }
        reader.readAsDataURL(file);
        $("#fileselect").val(file);
    }

    // display text
    if (file.type.indexOf("text") == 0) {
        var reader = new FileReader();
        reader.onload = function(e) {
            Output(
                "<p><strong>" + file.name + ":</strong></p><pre>" +
                e.target.result.replace(/</g, "&lt;").replace(/>/g, "&gt;") +
                "</pre>"
            );
        }
        reader.readAsText(file);
    }

}



// call initialization file
if (window.File && window.FileList && window.FileReader) {
    Init();
}


})();

Answer 1

A few things first…

---

my web host doesn’t have ajax

This doesn’t make much sense. (or any sense to be precise).

Ajax is just something YOU implement (in Javascript) in order to communicate with the server. (The same way you access a php script on a server; Ajax enables you to “fetch” it, in the background, without the need to reload the page, or being re-directed there).

So, in a few words : It has NOTHING to do with the server/host per se.

Reference : http://en.wikipedia.org/wiki/Ajax_(programming)

Is there any way I can do it without ajax?

Ajax.

---

Examples :

---

• jQuery Ajax
• The Ultimate Ajax Object