Rumah > Artikel > hujung hadapan web > 使用Html5实现异步上传文件,支持跨域,带有上传进度条
下面小编就为大家带来一篇使用Html5实现异步上传文件,支持跨域,带有上传进度条。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧
服务器准备IIS
需要设置IIS里面的HTTP响应标头,如图添加如下设置,添加这项“Access-Control-Allow-Origin”,只有添加了这行才能支持跨域,不然像Chrome浏览器会报错
页面代码:
XML/HTML Code复制内容到剪贴板
<!DOCTYPE html> <html> <head> <meta http-equiv="content-type" content="text/html;charset=utf-8"> <meta name="format-detection" content="telephone=no"> <meta name="msapplication-tap-highlight" content="no"> <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width"> <title>Html5上传文件</title> </head> <body> <p class="app"> <h1>Html5上传文件测试,带进度条</h1> <p> <input type="file" value="" id="fileInput" name="files" onchange="fileSelected()" /> <p style="margin:30px;"> <input type="button" value="上传" onclick="uploadFile()" /> </p> <p style="margin:30px;"> <p id="fileName"></p> <p id="fileSize"></p> <p id="fileType"></p> </p> <p style="margin:30px;width:500px;height:15px;border:1px solid #aeaeae;"> <p id="progress" style="background:#4cff00;height:15px;width:0%;"></p> <p id="percentNumber"></p> </p> <p style="margin:30px;"> <p id="msg"></p> </p> </p> </p> <script type="text/javascript"> function fileSelected() { //重置状态显示 document.getElementById("msg").innerHTML = ""; document.getElementById('percentNumber').innerHTML = ''; document.getElementById("progress").style.width = "0%"; var file = document.getElementById('fileInput').files[0]; 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; } } function uploadFile() { var fd = new FormData(); fd.append("fileInput", document.getElementById('fileInput').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", "http://10.0.0.200:9001/Home/Upload");//修改为自己服务器接口地址 //xhr.setRequestHeader("Access-Control-Allow-Origin", "*");//需要在IIS里面配置,就可以跨域请求了 //xhr.setRequestHeader("Content-Type", "multipart/form-data"); xhr.send(fd); } function uploadProgress(evt) { if (evt.lengthComputable) { var percentComplete = Math.round(evt.loaded * 100 / evt.total); document.getElementById('percentNumber').innerHTML = percentComplete + '%'; var jindutiao = document.getElementById("progress"); jindutiao.style.width = percentComplete + "%"; } else { document.getElementById('percentNumber').innerHTML = '不支持进度计算'; } } function uploadComplete(evt) { //evt.target.responseText document.getElementById("msg").innerHTML = "上传成功"; } function uploadFailed(evt) { document.getElementById("msg").innerHTML = "上传过程中有一个错误"; } function uploadCanceled(evt) { document.getElementById("msg").innerHTML = "用户取消了上传或者浏览器删除了连接"; } </script> </body> </html>
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