http post方式上传文件

来源：互联网发布：java多线程网络爬虫编辑：程序博客网时间：2024/05/17 04:26
第一步
自己建立一个网站，并通过iis进行发布
第二步
上传下载代码完善
// <summary>         /// 将本地文件上传到指定的服务器(HttpWebRequest方法)         /// </summary>         /// <param name="address">文件上传到的服务器</param>         /// <param name="fileNamePath">要上传的本地文件（全路径）</param>         /// <param name="saveName">文件上传后的名称</param>         /// <returns>成功返回1，失败返回0</returns>         private int Upload_Request(string address, string fileNamePath, string saveName)        {            int returnValue = 0;            // 要上传的文件             FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);            BinaryReader r = new BinaryReader(fs);            //时间戳             string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");            byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n");            //请求头部信息             StringBuilder sb = new StringBuilder();            sb.Append("--");            sb.Append(strBoundary);            sb.Append("\r\n");            sb.Append("Content-Disposition: form-data; name=\"");            sb.Append("file");            sb.Append("\"; filename=\"");            sb.Append(saveName);            sb.Append("\"");            sb.Append("\r\n");            sb.Append("Content-Type: ");            sb.Append("application/octet-stream");            sb.Append("\r\n");            sb.Append("\r\n");            string strPostHeader = sb.ToString();            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);            // 根据uri创建HttpWebRequest对象             HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));            httpReq.Method = "POST";            //对发送的数据不使用缓存             httpReq.AllowWriteStreamBuffering = false;            //设置获得响应的超时时间（300秒）             httpReq.Timeout = 300000;            httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;            long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;            long fileLength = fs.Length;            httpReq.ContentLength = length;            try            {                //每次上传4k                 int bufferLength = 4096;                byte[] buffer = new byte[bufferLength];                //已上传的字节数                 long offset = 0;                //开始上传时间                 DateTime startTime = DateTime.Now;                int size = r.Read(buffer, 0, bufferLength);                Stream postStream = httpReq.GetRequestStream();                //发送请求头部消息                 postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);                while (size > 0)                {                    postStream.Write(buffer, 0, size);                    offset += size;                    TimeSpan span = DateTime.Now - startTime;                    double second = span.TotalSeconds;                    lblTime.Text = "已用时：" + second.ToString("F2") + "秒";                    if (second > 0.001)                    {                        lblSpeed.Text = " 平均速度：" + (offset / 1024 / second).ToString("0.00") + "KB/秒";                    }                    else                    {                        lblSpeed.Text = " 正在连接…";                    }                    lblState.Text = "已上传：" + (offset * 100.0 / length).ToString("F2") + "%";                    lblSize.Text = (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M";                    Application.DoEvents();                    size = r.Read(buffer, 0, bufferLength);                }                //添加尾部的时间戳                 postStream.Write(boundaryBytes, 0, boundaryBytes.Length);                postStream.Close();                //获取服务器端的响应                 WebResponse webRespon = httpReq.GetResponse();                Stream s = webRespon.GetResponseStream();                StreamReader sr = new StreamReader(s);                //读取服务器端返回的消息                 String sReturnString = sr.ReadToEnd();//sr.ReadLine();                s.Close();                sr.Close();                if (sReturnString == "Success")                {                    returnValue = 1;                }                else if (sReturnString == "Error")                {                    returnValue = 0;                }            }            catch            {                returnValue = 0;            }            finally            {                fs.Close();                r.Close();            }            return returnValue;        }
下面可以做的就是调用这个函数，赋予上面发布的网址上面
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