Question

我必须修改InputStream 我知道我们可以使用带有自定义Filter的自定义HttpModule来实现。我还创建了一个Filter，它可以工作：它可以改变InputStream 我的过滤器源代码是：

namespace Test.Filter
{
    public class TestRequestFilter : Stream
    {
        private readonly Stream _inputStream;

        public TestRequestFilter (Stream inputFilter)
        {
            _inputStream = inputFilter;
        }

        public override int Read(byte[] buffer, int offset, int count)
        {
            _outputStream.Read(buffer, 0, (int)_outputStream.Length);
            var oldText = buffer.ToDefaultEncodingString();
            var newText = "hello world" + oldText;

            Encoding.Default.GetBytes(newText, 0, Encoding.Default.GetByteCount(newText), buffer, 0);

            return buffer.Length;
        }

        public override bool CanRead
        {
            get { return true; }
        }

        public override bool CanSeek
        {
            get { return true; }
        }

        public override bool CanWrite
        {
            get { return true; }
        }

        public override long Length
        {
            get { return _inputStream.Length; }
        }

        public override long Position
        {
            get { return _inputStream.Position; }
            set { throw new NotSupportedException(); }
        }

        public override long Seek(long offset, SeekOrigin origin)
        {
            throw new NotImplementedException();
        }

        public override void SetLength(long value)
        {
            throw new NotImplementedException();
        }

        public override void Write(byte[] buffer, int offset, int count)
        {
            throw new NotImplementedException();
        }

        public override void Flush()
        {
            _inputStream.Flush();
        }

        public override void Close()
        {
            _inputStream.Close();
        }
    }
}

我的问题有时候过滤器似乎没有运行（不调用Filter的Read方法）我的问题是：过滤器什么时候运行？我的环境：window 2008，.net 3.5，IIS 7.5，SharePoint 2010。

所有回复都将不胜感激。

如何修改Request.InputStream

0 个答案: