我使用 ASMX 样式调用编写了一个 Web 服务来提供 PDF 文件。该服务处理作为 POST 操作发送给它的数据，将数据写入响应，并在将新的 mime 类型添加到标头后将数据发回。
PDF 文件是在使用 AlivePDF 的 flex 应用程序中生成的客户端。
它工作了一段时间，但它最近开始在 google chrome 中失败 - 而不是在新窗口或 PDF 查看器中打开 PDF（取决于浏览器的配置），chrome 只是显示一个空页面。
如果在输入流中传递了有效的 PDF 数据，是否有原因导致此代码无法打开 PDF？
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class Print : System.Web.Services.WebService
{
[WebMethod]
public string PrintPDF()
{
HttpRequest request = HttpContext.Current.Request;
HttpResponse response = HttpContext.Current.Response;
string requestMethod = request.Params["method"];
string requestFilename = request.Params["name"];
if(!validateRequest(request))
{
throw new ArgumentException(String.Format("Error downloading file named '{0}' using disposition '{1}'", requestFilename, requestMethod));
}
response.AddHeader("Content-Disposition", "attachment; filename=\"" + requestFilename + "\"");
byte[] pdf = new byte[request.InputStream.Length];
request.InputStream.Read(pdf, 0, (int)request.InputStream.Length);
response.ContentType = "application/pdf";
response.OutputStream.Write(pdf, 0, (int)request.InputStream.Length);
response.Flush();
response.End();
return "Fail";
}
private bool validateRequest(HttpRequest request)
{
string requestMethod = request.Params["method"];
string requestFilename = request.Params["name"];
Regex cleanFileName = new Regex("[a-zA-Z0-9\\._-]{1, 255}\\.[a-zA-Z0-9]{1, 3}");
return (requestMethod == "attachment" || requestMethod == "inline") &&
cleanFileName.Match(requestFilename) != null;
}
}