我需要从客户端上传文件并在服务器端操作它。在操作之后,It(文件)必须显示在同一网页中而不重新加载整个页面。我在Play framework 2.X中使用Scala,使用单独的html,js脚本。文件类型 - .txt .xml .html
,等等
我已经尝试使用表单并上传文件。操作输出显示在下一页中。
编辑:1
HTML
<form class = "class1" id="myForm1" action="/upload" method="post" enctype="multipart/form-data">
<input type="file" size="60" id= "fileUpload1" name="fileUpload1">
<input type="submit" id ="ajaxCallUpload1" value="Validate">
</form>
JS
var form = document.getElementById('fileUpload1');
var uploadButton = document.getElementById('ajaxCallUpload1');
var outputMessage = document.getElementById('message1');
form.onsubmit = function(event){
event.preventDefault();
uploadButton.innerHTML= "Uploading.... "
}
var formdata = new FormData();
formdata.append('file',form)
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState == XMLHttpRequest.DONE) {
alert(xhr.responseText);
}
}
xhr.open('POST','/upload',true);
xhr.onload = function(){
if (xhr.status === 200){
uploadButton.innerHTML = 'Uploaded';
}
else{
alert('An error occurred!')
}
};
xhr.send(formdata)
调节器
def upload = Action(parse.multipartFormData) { request =>
request.body.file("fileUpload1").map { file =>
//file manupulation
Ok( output response)
}.getOrElse {
Ok("Error during uploading")
}}
我在form.onsubmit()中收到错误,输出是alert - 上传时错误(页面加载时)。上传文件后,我将在另一页中输出。
您必须这样做: - 从客户端 - 上传文件的Ajax发布请求; - 从服务器端 - 接收文件,执行任何操作并返回文件的URL; - 从客户端 - 响应 - 使用服务器响应(URL)显示您想要的文件。
谢谢你的帮助@aleck。我想通了,它完美无缺。
HTML
<form id="myForm" >
<input type="file" size="60" id ="fileUpload" name="fileUpload">
<input type="button" id ="ajaxCallUpload2" onclick= "extract(this)" value="Extract">
</form>
<div id="response" ><pre id="message"></pre></div>
</div>
JS
function extract(){
$("#message").empty();
var file = $("#fileUpload").get(0).files[0];
var formData = new FormData();
formData.append('file',file);
console.log("file appended")
$.ajax({
url: '/extract',
type: 'POST',
data: formData,
processData: false,
contentType: false,
success: function (data) {
console.log(data)
document.getElementById("message").innerHTML=data;
},
error: function () {
document.getElementById("message").innerHTML="Oops! Invalid file.";
}
});
}
调节器
def extract = Action(parse.multipartFormData) { request =>
val file = request.body.file("file").get
//manipulation
Ok(/*manipulated result*/)}
}