HTML 5 檔案上傳
阿新 • • 發佈:2018-12-23
function fileSelected() {
var file = document.getElementById('fileToUpload').files[0];
alert(document.getElementById('fileToUpload').files[1]);
if(file) {
var fileSize = 0;
if(file.size > 1024 * 1024)
fileSize = (Math .round(file.size * 100 /(1024 * 1024)) / 100).toString() + 'MB';
else
fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';
document.getElementById('fileName').innerHTML = 'Name: ' + file.name;
document.getElementById('fileSize' ).innerHTML = 'Size: ' + fileSize;
document.getElementById('fileType').innerHTML = 'Type: ' + file.type;
if(file.type.indexOf('image') != -1) { // 非常簡單的交驗
var s = document.getElementById('fileimg');
s.innerHTML = '' ;
var reader = new FileReader();
reader.onload = function(e) {
var img = new Image();
img.src = e.target.result; // 顯示圖片的地方
s.appendChild(img);
};
reader.readAsDataURL(file);
}
}
}
function uploadFile() {
var fd = new FormData();
fd.append("fileToUpload", document.getElementById('fileToUpload').files[0]);
var xhr = new XMLHttpRequest();
xhr.upload.addEventListener("progress", uploadProgress, false);
xhr.addEventListener("load", uploadComplete, false);
xhr.addEventListener("error", uploadFailed, false);
xhr.addEventListener("abort", uploadCanceled, false);
xhr.open("POST", "${urlPath}/upload/parserUploadFile2");
xhr.send(fd);
}
function uploadProgress(evt) {
if(evt.lengthComputable) {
var percentComplete = Math.round(evt.loaded * 100 / evt.total);
document.getElementById('progressNumber').innerHTML = percentComplete.toString() + '%';
} else {
document.getElementById('progressNumber').innerHTML = 'unable to compute';
}
}
function uploadComplete(evt) {
/* This event is raised when the server send back a response */
alert(evt.target);
alert(evt.target.responseText);
}
function uploadFailed(evt) {
alert("There was an error attempting to upload the file.");
}
function uploadCanceled(evt) {
alert("The upload has been canceled by the user or the browser dropped the connection.");
}