如何在OWIN管道上的web api 2中接收multipart/form-data
我无法让我的web api 2方法在角度用户界面上从ng-file-upload正确读取我的multipart/form-data文章侧。如何在OWIN管道上的web api 2中接收multipart/form-data
我发起呼叫,像这样:
Upload.upload({
url: config.ApiUrl + 'Orders/CreateOrder',
data: request
}).then(function (response) {
console.log('Success ' + response.config.data.file.name + 'uploaded. Response: ' + response.data);
}, function (error) {
$scope.errors = "Oops! Something went wrong... " + error.statusText;
});
这让我的有效载荷发送到网络API:
-----------------------------9623122368016
Content-Disposition: form-data; name="somefield"
Some Value
-----------------------------9623122368016
Content-Disposition: form-data; name="errorMessage"
null
-----------------------------9623122368016
Content-Disposition: form-data; name="success"
false
-----------------------------9623122368016
Content-Disposition: form-data; name="file"; filename="imapdf.pdf"
Content-Type: application/pdf
%PDF-1.2
1 0 obj
<<
/Producer()
/Author()
/Title()
/Subject()
/Keywords()
/CreationDate(D:20040106)
/ModDate(D:20040106)
/Creator()
>>
endobj
2 0 obj
<<
/Type/XObject
/Subtype/Image
/Name/wpt1
/Width 41
/Height 15
/BitsPerComponent 8
/ColorSpace/DeviceRGB
/Length 100
/Filter [/FlateDecode] >>
stream
xsqH0s
我无法访问HttpContext.Current.Request.Files
因为我使用OWIN管道,并没有太多运气Request.Content.ReadAsMultipartAsync
我怎样才能接收我的文件&它与web api 2中的表单数据相关联?
C#代码更新:
public Task<OrderRequest> CreateOrder(OrderRequest orderRequest)
{
try
{
var asdf = OwinHttpRequestMessageExtensions.GetOwinContext(Request);
if (!Request.Content.IsMimeMultipartContent("multipart/form-data"))
{
var provider = new MultipartMemoryStreamProvider();
this.Request.Content.ReadAsMultipartAsync(provider);
var content = provider.Contents.First();
var buffer = content.ReadAsByteArrayAsync();
}
var test = orderRequest;
var a = HttpContext.Current.Request.Files;
}
catch (Exception ex)
{
throw ex;
}
return Task.FromResult<OrderRequest>(null);
}
顾名思义,ReadAsMultipartAsync
是异步功能。由于您没有在等待电话,因此您可能最终会在您尝试访问Contents
之前填充该电话。
为了解决这个问题,你可以按以下步骤更新您的CreateOrder
行动:
public async Task<OrderRequest> CreateOrder(OrderRequest orderRequest)
{
...
await this.Request.Content.ReadAsMultipartAsync(provider);
...
}
所有这一切在这里改变是增加了async
this.Request.Content.ReadAsMultipartAsync(provider);
之前Task<OrderRequest>
和await
之前。由于相同的原因,您还需要在content.ReadAsByteArrayAsync();
之前添加await
,然后您可以只使用return null
,而不必在最后使用Task.FromResult
。
事实上,这里的这些变化对整个代码:
public async Task<OrderRequest> CreateOrder(OrderRequest orderRequest)
{
try
{
var asdf = OwinHttpRequestMessageExtensions.GetOwinContext(Request);
if (!Request.Content.IsMimeMultipartContent("multipart/form-data"))
{
var provider = new MultipartMemoryStreamProvider();
await this.Request.Content.ReadAsMultipartAsync(provider);
var content = provider.Contents.First();
var buffer = await content.ReadAsByteArrayAsync();
}
var test = orderRequest;
var a = HttpContext.Current.Request.Files;
}
catch (Exception ex)
{
throw ex;
}
return null;
}
显然,这不是一个完整的解决方案,但我相信它会满足您的具体问题,并允许你继续探索。
这很有道理,感谢您的帮助! – RandomUs1r
它看起来像AngularJS代码正确创建HTTP请求。请显示有问题的服务器端代码。 – georgeawg
@georgeawg张贴我无意中获得的数据 – RandomUs1r
看来你需要使用'Request.Content.ReadAsMultipartAsync'。你能告诉我们你的代码吗? –