Create http request using TcpClient

Question

I have created an empty asp.net web application where I have a simple aspx page:

protected void Page_Load(object sender, EventArgs e)
{
    Response.Write(\"         


        

Answer 1

Here is my version. Works fine

    private static async Task HttpRequestAsync()
    {
        string result = string.Empty;

        using (var tcp = new TcpClient("www.bing.com", 80))
        using (var stream = tcp.GetStream())
        {
            tcp.SendTimeout = 500;
            tcp.ReceiveTimeout = 1000;
            // Send request headers
            var builder = new StringBuilder();
            builder.AppendLine("GET /?scope=images&nr=1 HTTP/1.1");
            builder.AppendLine("Host: www.bing.com");
            //builder.AppendLine("Content-Length: " + data.Length);   // only for POST request
            builder.AppendLine("Connection: close");
            builder.AppendLine();
            var header = Encoding.ASCII.GetBytes(builder.ToString());
            await stream.WriteAsync(header, 0, header.Length);

            // Send payload data if you are POST request
            //await stream.WriteAsync(data, 0, data.Length);

            // receive data
            using (var memory = new MemoryStream())
            {
                await stream.CopyToAsync(memory);
                memory.Position = 0;
                var data = memory.ToArray();

                var index = BinaryMatch(data, Encoding.ASCII.GetBytes("\r\n\r\n")) + 4;
                var headers = Encoding.ASCII.GetString(data, 0, index);
                memory.Position = index;

                if (headers.IndexOf("Content-Encoding: gzip") > 0)
                {
                    using (GZipStream decompressionStream = new GZipStream(memory, CompressionMode.Decompress))
                    using (var decompressedMemory = new MemoryStream())
                    {
                        decompressionStream.CopyTo(decompressedMemory);
                        decompressedMemory.Position = 0;
                        result = Encoding.UTF8.GetString(decompressedMemory.ToArray());
                    }
                }
                else
                {
                    result = Encoding.UTF8.GetString(data, index, data.Length - index);
                    //result = Encoding.GetEncoding("gbk").GetString(data, index, data.Length - index);
                }
            }

            //Debug.WriteLine(result);
            return result;
        }
    }

    private static int BinaryMatch(byte[] input, byte[] pattern)
    {
        int sLen = input.Length - pattern.Length + 1;
        for (int i = 0; i < sLen; ++i)
        {
            bool match = true;
            for (int j = 0; j < pattern.Length; ++j)
            {
                if (input[i + j] != pattern[j])
                {
                    match = false;
                    break;
                }
            }
            if (match)
            {
                return i;
            }
        }
        return -1;
    }