文件上传去除"Content-Disposition: form-data"

时间:2022-11-27 17:16:06

某个项目中为了统一处理文件上传业务,创建了一个FileUpload Handle,由于上传客户端用到各种技术,当时为了方便断点续传,就直接接收请求中的文件内容(可能是分片),所以处理的不是规范的http请求,一直工作的很好,但是现在使用html代码上传文件时遇到了问题:
服务接收到的文件中会多一个头和尾,原始内容如:

Part,Product
,
,

服务端接收到的如:

-----------------------------7e0bc1790bd2
Content-Disposition: form-data; name="picture"; filename="C:\Users\ns56\Desktop\key_no.csv"
Content-Type: application/vnd.ms-excel Part,Product
,
,
-----------------------------7e0bc1790bd2--

由此可见html上传的是标准http请求,附带了文件信息,那么现在要做的就是去掉"Content-Disposition: form-data"
经过分析只能使用Ajax来发送请求:

    <script>
function doUpload() {
$.ajax({
url: 'http://',
type: 'POST',
data: document.getElementById('file1').files[],
async: false,
cache: false,
contentType: 'application/x-www-form-urlencoded',
processData: false,
success: function (returndata) {
alert(returndata);
},
error: function (returndata) {
alert(returndata);
}
});
}
</script>

界面元素如下:

    <form id="uploadForm">
<p>
Pictures:
<input type="file" name="picture" id="file1" />
</p>
</form>
<input type="button" value="上传" onclick="doUpload()" />

另附Angular文件上传代码:

    <div ng-app="DemoApp" ng-controller="DemoController">
<span class="input-group-addon">File Path:</span>
<input type="file" id="file1" name="file1" neg-file-input ngf-select ng-model="file1" accept=".*" />
<button type="button" ng-click="Upload()">Upload</button>
</div>

JS部分:

    var app = angular.module('DemoApp', []);

    app.controller('DemoController', ['$scope', '$http', function ($scope, $http) {
//为按钮定义函数
$scope.Upload = function () {
var file = document.getElementById("file1").files[];
$scope.UploadHeader = {
headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
}
$http.post("up.ashx", file, $scope.UploadHeader)
.success(function (returndata) {
alert(returndata);
})
.error(function () {
alert(returndata);
});
} }]);

Handle部分:

        public void ProcessRequest(HttpContext context)
{
using (var inputStream = context.Request.InputStream)
{
string path = HttpContext.Current.Server.MapPath("UP");
using (var flieStream = new FileStream(path + "/1.txt", FileMode.Create))
{
inputStream.CopyTo(flieStream);
}
}
context.Response.Write("ok");
}