using System;
using System.Web;
using System.Net;
using System.IO;
using System.Text;

namespace bxg.framework.net
{
    public class UrlRequest
    {
        public static HttpWebResponse Send(string url, string contentType, string method, CookieContainer defaultCookieContainer, Encoding encoding, string postData, out CookieContainer cookieContainer)
        {
            try
            {
                HttpWebRequest hwr;
                hwr = (HttpWebRequest)WebRequest.Create(url);
                if (defaultCookieContainer != null)
                    hwr.CookieContainer = defaultCookieContainer;
                else
                    hwr.CookieContainer = new CookieContainer();
                hwr.KeepAlive = false;
                hwr.ContentLength = 0;

                if (!string.IsNullOrEmpty(contentType))
                    hwr.ContentType = contentType;
                if (!string.IsNullOrEmpty(method))
                    hwr.Method = method;
                if (!string.IsNullOrEmpty(postData))
                {
                    byte[] byte1 = encoding.GetBytes(postData);
                    hwr.ContentLength = byte1.Length;
                    Stream stream = hwr.GetRequestStream();
                    stream.Write(byte1, 0, byte1.Length);
                    stream.Close();
                }

                HttpWebResponse response = (HttpWebResponse)hwr.GetResponse();
                cookieContainer = hwr.CookieContainer;
                return response;
            }
            catch (System.Exception e)
            {
                throw e;
            }
        }

        public static HttpWebResponse Send(string url)
        {
            return Send(url, string.Empty, "GET", Encoding.UTF8, string.Empty);
        }

        public static HttpWebResponse Send(string url, string method)
        {
            string contentType = "";
            if (method == "POST")
                contentType = "application/x-www-form-urlencoded";
            return Send(url, contentType, method, Encoding.UTF8, string.Empty);
        }

        public static HttpWebResponse Send(string url, string contentType, string method)
        {
            return Send(url, contentType, method, Encoding.UTF8, string.Empty);
        }

        public static HttpWebResponse Send(string url, string contentType, string method, Encoding encoding, string postData)
        {
            CookieContainer cookieContainer;
            return Send(url, contentType, method, encoding, postData, out  cookieContainer);
        }

        public static HttpWebResponse Send(string url, string contentType, string method, Encoding encoding, string postData, out CookieContainer cookieContainer)
        {
            return Send(url, contentType, method, null, encoding, postData, out  cookieContainer);        
        }

        public static string GetText(string url)
        {
            string fileBody = string.Empty;
            StreamReader reader = null;
            Stream stream = null;

            try
            {
                stream = GetStream(url);
                reader = new StreamReader(stream, Encoding.UTF8);
                fileBody = reader.ReadToEnd();
            }
            finally
            {
                if (null != stream)
                    stream.Close();
            }

            return fileBody;
        }

        public static Stream GetStream(string url)
        {
            WebResponse response = Send(url);
            Stream stream = null;
            if (response != null)
                stream = response.GetResponseStream();
            return stream;
        }

        public static void Save(string file, string fileName)
        {
            FileStream fs = null;
            try
            {
                fs = File.Create(fileName);
                byte[] buffer;
                buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(file);
                fs.Write(buffer, 0, buffer.Length);
                fs.Close();

            }
            catch (IOException e)
            {
                throw e;
            }
            finally
            {
                if (fs != null) fs.Close();
            }
        }

        public static void Save(Stream file, string fileName)
        {
            FileStream fs = null;
            try
            {
                fs = File.Create(fileName);
                byte[] buffer = new byte[1024];

                int l;
                do
                {
                    l = file.Read(buffer, 0, buffer.Length);
                    if (l > 0) fs.Write(buffer, 0, l);
                }
                while (l > 0);
            }
            catch (IOException e)
            {
                throw e;
            }
            finally
            {
                if (fs != null) fs.Close();
                file.Close();
            }
        }
    }
}