服务器端提供pdf文件下载,非直接访问模式

[遛弯鱼]

文件上传到内网，但对外网提供文件下载，不允许外网直接输入路径访问，但PDF怎样实现下载，现在代码如下

object content = string.Empty;
string commandArgument = e.CommandArgument.ToString();
string filePath = commandArgument;
string fileext = System.IO.Path.GetExtension(filePath);
string contentType = string.Empty;
if (fileext == ".doc" || fileext == ".docx")
{
   _Application myWordApp = new Microsoft.Office.Interop.Word.ApplicationClass();
   _Document myWordDoc;
   contentType = "application/msword";
   myWordDoc = myWordApp.Documents.Open(Constant.GetInnerFileServerPath() + filePath);
   content = myWordDoc.Content.Text;
   myWordDoc.Close();
   myWordApp.Quit();
}
else if (fileext == ".pdf")
{
   StreamReader sr = null;
   Stream ostream = HttpWebResponseUtility.CreateGetHttpResponse(Constant.GetInnerFileServerPath() + filePath, 2000, null, null).GetResponseStream();          
   sr = new StreamReader(ostream, System.Text.Encoding.UTF8);
   string strContent= sr.ReadToEnd();
   content = strContent;
   contentType = "application/pdf";
}
Response.AppendHeader("Connection", "close");
Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(System.IO.Path.GetFileName(filePath), System.Text.Encoding.UTF8));
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = contentType;
Response.ContentEncoding = System.Text.Encoding.UTF8;
Response.Write(content);
Response.Flush();
Response.End();

第一个doc能够实现下载，docx未能完全实现，第二个pdf解析出来总是中文乱码请求大神怎样才能实现下载，尝试过试用Itestsharp、Acrobat.dll等，最好在我基础上写上源码

[moonwrite]

Response.Charset = "UTF-8"; Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); Response.ContentType = "application/octet-stream";//不用判断后缀名选择不同的type Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(fileName)); Response.BinaryWrite(bytes); Response.Flush(); Response.End();

[遛弯鱼]

bytes是怎样获得的 Stream ostream = HttpWebResponseUtility.CreateGetHttpResponse(Constant.GetInnerFileServerPath() + filePath, 2000, null, null).GetResponseStream(); (红色部分是内网地址 例如http://192.168.1.2) 最原始的流是Stream网络流 是无法获得流长度的

[moonwrite]

只要你的HttpWebResponseUtility不是异步的 那么接下来就是将Stream 转成byte[]的 百度一下 反正思想就是电脑的一切数据都可以读成byte[]的 然将byte[]输出就是

[遛弯鱼]

啊哈，果然BinaryWrite可以的~

Stream ostream = HttpWebResponseUtility.CreateGetHttpResponse(Constant.GetInnerFileServerPath() + filePath, 2000, null, null).GetResponseStream();
List<byte> bytes = new List<byte>();
int temp = ostream.ReadByte();
while (temp != -1)
{
  bytes.Add((byte)temp);
  temp = ostream.ReadByte();
}       
contentType = "application/octet-stream";
Response.AppendHeader("Connection", "close");
Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(System.IO.Path.GetFileName(filePath), System.Text.Encoding.UTF8));
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = contentType;
Response.ContentEncoding = System.Text.Encoding.UTF8;
Response.BinaryWrite(bytes.ToArray());
Response.Flush();
Response.End();

[以专业开发人员为伍]

嗯。删除点东西有好处。想得太多了反而出错。

[以专业开发人员为伍]

引用 4 楼 peng_bin1989 的回复:

啊哈，果然BinaryWrite可以的~

Stream ostream = HttpWebResponseUtility.CreateGetHttpResponse(Constant.GetInnerFileServerPath() + filePath, 2000, null, null).GetResponseStream();
List<byte> bytes = new List<byte>();
int temp = ostream.ReadByte();
while (temp != -1)
{
  bytes.Add((byte)temp);
  temp = ostream.ReadByte();
}       

其实人家 asp.net 早就有的 TransmitFile(filename) 方法比你的功能更强大，人家可以支持大文件输出（少占用内存），而且可以自动检测客户端是否连线。

[遛弯鱼]

@sp1234 受教了，结贴给分