在JQuery的文件输入获取数据 [英] Get data from file input in JQuery
问题描述
其实我有一个文件输入，我想检索文件的Base64编码数据。
I actually have a file input and I would like to retrieve the Base64 data of the file.
我试过：
$('input#myInput')[0].files[0]
来检索数据。但它只提供的名称，长度，内容类型，但不是数据本身。
to retrieve the data. But it only provides the name, the length, the content type but not the data itself.
其实，我需要这些数据将它们发送到Amazon S3
I actually need these data to send them to Amazon S3
我已经测试API，当我通过HTML表单与发送数据连接code型的multipart / form-data的它的工作原理。
I already test the API and when I send the data through html form with encode type "multipart/form-data" it works.
我使用这个插件：<一href=\"http://jasny.github.com/bootstrap/javascript.html#fileupload\">http://jasny.github.com/bootstrap/javascript.html#fileupload
和这个插件让我的图片的preVIEW我在图像preVIEW的src属性检索数据。但是，当我把这些数据S3这是行不通的。我也许需要EN code像的multipart / form-data的数据，但我不知道为什么。
And this plugins gives me a preview of the picture and I retrieve data in the src attribute of the image preview. But when I send these data to S3 it does not work. I maybe need to encode the data like "multipart/form-data" but I don't know why.
有没有办法不使用HTML表单检索这些数据？
Is there a way to retrieve these data without using an html form?
推荐答案
你可以尝试的FileReader API这样的事情。
you can try FileReader API something like this.
<!DOCTYPE html>
<html>
<head>
<script>
function handleFileSelect()
{
if (!window.File || !window.FileReader || !window.FileList || !window.Blob) {
alert('The File APIs are not fully supported in this browser.');
return;
}
input = document.getElementById('fileinput');
if (!input) {
alert("Um, couldn't find the fileinput element.");
}
else if (!input.files) {
alert("This browser doesn't seem to support the `files` property of file inputs.");
}
else if (!input.files[0]) {
alert("Please select a file before clicking 'Load'");
}
else {
file = input.files[0];
fr = new FileReader();
fr.onload = receivedText;
//fr.readAsText(file);
fr.readAsDataURL(file);
}
}
function receivedText() {
document.getElementById('editor').appendChild(document.createTextNode(fr.result));
}
</script>
</head>
<body>
<input type="file" id="fileinput"/>
<input type='button' id='btnLoad' value='Load' onclick='handleFileSelect();'>
<div id="editor"></div>
</body>
</html>
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