<input type="file" onchange="upload(this.files[0])">
```
function upload(file){
readBlobAsDataURL(file, function (dataurl){
var formData = new FormData();
formData.append("upload",convertBase64UrlToBlob(dataurl))
$.ajax({
url: 'http://127.0.0.1:3000/upload' ,
type: 'POST',
data: formData,
async: false,
cache: false,
contentType: false,
processData: false,
success: function (returndata) {
},
error: function (returndata) {
}
});
});
}
function readBlobAsDataURL(file, callback) {
var a = new FileReader();
a.onload = function(e) {callback(e.target.result);};
a.readAsDataURL(file);
}
//图片格式转化
function convertBase64UrlToBlob(urlData) {
var bytes = window.atob(urlData.split(',')[1]); //去掉url的头，并转换为byte
//处理异常,将ascii码小于0的转换为大于0
var ab = new ArrayBuffer(bytes.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < bytes.length; i++) {
ia[i] = bytes.charCodeAt(i);
}
return new Blob([ab], {
type: 'image/png'
});
}
```
(参考http://blog.csdn.net/cuixiping/article/details/45932793)
node服务端 https://github.com/xiemingzhang/nodejs_imgUpload
