详解crifan的C#库：crifanLib.cs

第 9 章 crifanLib.cs之Http

    // valid charset:"GB18030"/"UTF-8", invliad:"UTF8"
    public string getUrlRespHtml(string url,
                                    Dictionary<string, string> headerDict = defHeaderDict,
                                    string charset = defCharset,
                                    Dictionary<string, string> postDict = defPostDict,
                                    int timeout = defTimeout,
                                    string postDataStr = defPostDataStr,
                                    int readWriteTimeout = defReadWriteTimeout)
    {
        string respHtml = "";

        HttpWebResponse resp = getUrlResponse(url, headerDict, postDict, timeout, postDataStr, readWriteTimeout);

        //long realRespLen = resp.ContentLength;
        if (resp != null)
        {
            StreamReader sr;
            Stream respStream = resp.GetResponseStream();
            if (!string.IsNullOrEmpty(charset))
            {
                Encoding htmlEncoding = Encoding.GetEncoding(charset);
                sr = new StreamReader(respStream, htmlEncoding);
            }
            else
            {
                sr = new StreamReader(respStream);
            }

            try
            {
                respHtml = sr.ReadToEnd();

                //while (!sr.EndOfStream)
                //{
                //    respHtml = respHtml + sr.ReadLine();
                //}

                //string curLine = "";
                //while ((curLine = sr.ReadLine()) != null)
                //{
                //    respHtml = respHtml + curLine;
                //}

                ////http://msdn.microsoft.com/zh-cn/library/system.io.streamreader.peek.aspx
                //while (sr.Peek() > -1) //while not error or not reach end of stream
                //{
                //    respHtml = respHtml + sr.ReadLine();
                //}

                //respStream.Close();
                //sr.Close();
                //resp.Close();
            }
            catch (Exception ex)
            {
                //【未解决】C#中StreamReader中遇到异常：未处理ObjectDisposedException,无法访问已关闭的流
                //http://www.crifan.com/csharp_streamreader_unhandled_exception_objectdisposedexception_cannot_access_closed_stream
                //System.ObjectDisposedException
                respHtml = "";
            }
            finally
            {
                if (respStream != null)
                {
                    respStream.Close();
                }
                if (sr != null)
                {
                    sr.Close();
                }
                if (resp != null)
                {
                    resp.Close();
                }
            }
        }

        return respHtml;
    }