我正在将文档存储在数据库中,并具有用于下载文档的API.
docx和xlsx的下载在IE9,Chrome和FF中运行良好但在真正的IE8中失败.(IE8模式下的IE 9也可以)
我得到的错误消息如下：
Unable to download 393 from idler2.
Unable to open this Internet site. The requested site is either
unavailable or cannot be found. Please try again later.
使用以下响应标头：
HTTP / 1.1 200好的
缓存控制：无缓存
Pragma：没有缓存
Content-Length: 10255 Content-Type: application/octet-stream Expires: -1 Server: Microsoft-IIS/7.5 Content-Disposition: attachment; filename=document.docx X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET Date: Sat,23 Mar 2013 11:30:41 GMT
这是我的api方法：
public HttpResponseMessage GetDocumentContent(int id)
{
Document document = Repository.StorageFor<Client>().GetDocument(id);
HttpResponseMessage response = Request.CreateResponse(System.Net.HttpStatusCode.OK);
response.Content = new ByteArrayContent(document.GetBuffer());
response.Content.Headers.ContentLength = document.GetBuffer().Length;
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
//FileName = document.GetFileName(),FileName = "document.docx",DispositionType = "attachment"
};
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
return response;
}
解决方法
我假设您在SSL下遇到此问题.如果是,那么这是一个
known issue.本文讨论Office文档,但此问题适用于所有文件类型.
该文的解决方案是删除无缓存标头,但还有更多内容.当IE8通过SSL与网站通信时,IE8会强制执行任何无缓存请求.如果存在标头或标头,则IE8不会缓存该文件.因此无法打开文件.所有这些都是IE5到IE8特有的.
在MVC Web API中,它实际上又迈出了一步.由于您要创建新的HttpResponseMessage,因此还必须在消息的标题上创建CacheControlHeaderValue.您不必设置任何标头属性,只需实例化一个新属性.标题将默认为所需内容,因此您不必更改属性.
public HttpResponseMessage GetDocumentContent(int id)
{
Document document = Repository.StorageFor<Client>().GetDocument(id);
HttpResponseMessage response = Request.CreateResponse(System.Net.HttpStatusCode.OK);
response.Headers.CacheControl = new CacheControlHeaderValue(); // required
response.Content = new ByteArrayContent(document.GetBuffer());
response.Content.Headers.ContentLength = document.GetBuffer().Length;
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = "document.docx"
};
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
return response;
}
我有确切的问题,但这解决了它.
