/* 函数说明: 开始一个下载请求 */
public IEnumerator StartRequest(string fileName)
{
m_fileName = fileName;
// 判断文件是否已存在
if (GetDownloadedFile(m_fileName, out m_filePath))
{
m_status = Status.Finish;
Close();
yield break;
}
// 创建本地下载目录
if (!ResUtils.MakeDirectory(m_filePath))
{
m_status = Status.Failed;
Close();
Debug.LogError(string.Format("HttpDownloader : MakeDirectory '{0}' Error !", m_filePath));
yield break;
}
string url = ResUpdater.Instance().GetDownloadUrl(m_fileName);
if (string.IsNullOrEmpty(url))
{
m_status = Status.Failed;
Close();
Debug.LogError("HttpDownloader : download url is null !");
yield break;
}
m_status = Status.Downing;
m_www = new WWW(url);
yield return(m_www);
// 如果错误， 则返回
if (!string.IsNullOrEmpty(m_www.error))
{
m_status = Status.Failed;
yield break;
}
// 写文件
WriteFile(m_filePath, m_www.bytes);
}
public static bool GetDownloadedFile(string fileName, out string fullPath)
{
Debug.LogError("Start GetDownloadedFile " + fileName);
if (string.IsNullOrEmpty(fileName))
{
Debug.LogError("if (string.IsNullOrEmpty(fileName))");
fullPath = "";
return(false);
}
fullPath = ResUtils.GetDownloadPath(fileName);
if (!File.Exists(fullPath))
{
Debug.LogError("if (!File.Exists(fullPath)) fullPath :" + fullPath);
return(false);
}
// 匹配文件md5
Dictionary <string, string> serverFilesMD5 = ResUpdater.Instance().serverFilesMD5;
string fileMD5;
if (serverFilesMD5.TryGetValue(fileName, out fileMD5))
{
Debug.LogError("if (serverFilesMD5.TryGetValue(fileName, out fileMD5)) fileMD5 " + fileMD5);
if (string.IsNullOrEmpty(fileMD5))
{
return(false);
}
string localFileMD5 = ResUtils.GetFileMD5(fullPath);
Debug.LogError(" if (string.IsNullOrEmpty(fileMD5)) fileMD5 " + fileMD5 + " localFileMD5 " + localFileMD5);
return(string.Compare(fileMD5, localFileMD5, true) == 0);
}
Debug.LogError("Stop GetDownloadedFile");
return(false);
}
