使用javascript读取txt文件

Question

I need to read a file from the browser and I CANNOT use ajax.. it is necessary to be read locally..

this is not a duplicate from Reading a file using javascript

how can I do that?

ps: I also CANNOT use an engine like V8 http://code.google.com/p/v8/ I need to read it with the current native API from javascript!.. is there any way to do that?

ps2: it must run only with chrome, or firefox! IE and others doesnt matter

Answer 1

Here is the sample: DEMO

 function readMultipleFiles(evt) {
    //Retrieve all the files from the FileList object
    var files = evt.target.files;

    if (files) {
        for (var i = 0, f; f = files[i]; i++) {
            var r = new FileReader();
            r.onload = (function (f) {
                return function (e) {
                    var contents = e.target.result;
                    alert(contents);
                };
            })(f);
            r.readAsText(f);
        }
    } else {
        alert("Failed to load files");
    }
}
document.getElementById('fileinput').addEventListener('change', readMultipleFiles, false);