示例#1
0
    void  PushDownFile(List <DownResInfo> downList, string url)
    {
        DownResInfo node = new DownResInfo();

        node.url = url;
        CHttpDown.GetDownFileSize(url, out node.nFileSize);
        downList.Add(node);
    }
示例#2
0
    void DownFile(CHttp http, string url, int nFileSize, int nLastDownSize)
    {
        // 如果文件比较小的话,可以不分片下载,真正下载整个文件
        if (nFileSize == 0)
        {
            CHttpDown.GetDownFileSize(url, out nFileSize);
        }

        DownResFile resInfo = new DownResFile();

        resInfo.url       = url;
        resInfo.nFileSize = 0;

        if (0 == nFileSize)
        {
            // 无法获取文件大小信息,整个下载吧
            bool bSuc = DownPart(http, url, 0, 0, nFileSize, resInfo);
            NotifyDownEvent(url, bSuc, resInfo);
            return;
        }
        int nPageSize   = 1024 * 300;    // 分片的大小,应小于你的最大限制下载速度, 这里默认选用300K,读者自己根据项目修改
        int nFileOffset = nLastDownSize; // 从上一次下载的位置接着下载
        int nDownSize   = 0;

        for (; nFileOffset < nFileSize; nFileOffset += nPageSize)
        {
            // 先限速
            LimitSpeed();
            // 开始分片下载
            nDownSize = nFileOffset + nPageSize < nFileSize ? nPageSize : (nFileSize - nFileOffset);
            if (!DownPart(http, url, nFileOffset, nDownSize, nFileSize, resInfo))
            {
                NotifyDownEvent(url, false, resInfo);
                return;
            }
        }
        NotifyDownEvent(url, true, resInfo);
    }