求解文件上传的路径问题

Question

///
/// 上传文件
///
/// 上传Token
/// key
/// 本地文件名
public CallRet PutFile(string upToken, string localFile, string key)
{
if (!File.Exists(localFile))
{
throw new Exception(string.Format("{0} does not exist", localFile));
}

        PutAuthClient client = new PutAuthClient(upToken);
        CallRet ret;
        using (FileStream fs = File.OpenRead(localFile))
        {
            int block_cnt = block_count(fs.Length);
            long fsize = fs.Length;
            extra.Progresses = new BlkputRet[block_cnt];
            byte[] byteBuf = new byte[BLOCKSIZE];
            int readLen = BLOCKSIZE;
            for (int i = 0; i < block_cnt; i++)
            {
                if (i == block_cnt - 1) { 
                    readLen = (int)(fsize - (long)i * BLOCKSIZE);
                }
                fs.Seek((long)i * BLOCKSIZE, SeekOrigin.Begin);
                fs.Read(byteBuf, 0, readLen);
                BlkputRet blkRet = ResumableBlockPut(client, byteBuf, i, readLen);
                if (blkRet == null)
                {
                    extra.OnNotifyErr(new PutNotifyErrorEvent(i, readLen, "Make Block Error"));
                }
                else
                {
                    extra.OnNotify(new PutNotifyEvent(i, readLen, extra.Progresses[i]));
                }
            }
            ret = Mkfile(client, key, fsize);
        }
        if (ret.OK)
        {
            if (PutFinished != null)
            {
                PutFinished(this, ret);
            }
        }
        else
        {
            if (PutFailure != null)
            {
                PutFailure(this, ret);
            }
        }
        return ret;
    }

参数localfile应该是文件的绝对路径，如果用input：file 上传，后台怎么获取上传文件的绝对路径赋给这个参数啊？

Answer 1

一些浏览器不会发送上传路径，而且客户端的路径对你来说也没有意义。