internal bool HttpDownload(string url, string localFile)
{
string directory = Path.GetDirectoryName(localFile);
//Console.WriteLine($"下载路径：{url}，本地路径：{directory}，文件名：{Path.GetFileName(localFile)}");
Common.WriteLog_Information("下载路径：{0}，本地路径：{1}，文件名：{2}", url, directory, Path.GetFileName(localFile));
bool success = false;
FileStream writeStream = null;
Stream readStream = null;
string backupFile = localFile + Updater.UpdateTempFileName;
if (File.Exists(localFile))
{
File.Move(localFile, backupFile);
Common.WriteLog_Information("备份文件：{0} => {1}", localFile, backupFile);
}
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
writeStream = new FileStream(localFile, FileMode.Create);
DownloadFileInfo downloadingFile = null;
try
{
downloadingFile = new DownloadFileInfo(localFile, backupFile, 0, 0);
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Proxy = null;
WebResponse webResponse = webRequest.GetResponse();
long contentLength = webResponse.ContentLength;
downloadingFile.ContentLength = contentLength;
OnDownloading(new DownloadInfo(DownloadState.BeginDownload, downloadingFile));
readStream = webResponse.GetResponseStream();
byte[] buffer = new byte[8192];
int downloadedSize = readStream.Read(buffer, 0, buffer.Length);
downloadingFile.DownloadedSize += downloadedSize;
OnDownloading(new DownloadInfo(DownloadState.Downloading, downloadingFile));
while (downloadedSize > 0)
{
writeStream.Write(buffer, 0, downloadedSize);
downloadedSize = readStream.Read(buffer, 0, buffer.Length);
downloadingFile.DownloadedSize += downloadedSize;
OnDownloading(new DownloadInfo(DownloadState.Downloading, downloadingFile));
Application.DoEvents();
}
OnDownloading(new DownloadInfo(DownloadState.Downloaded, downloadingFile));
success = true;
}
catch (Exception ex)
{
throw Common.Exception <Exception>(ex.Message + Environment.NewLine + "错误代码：0x0f01");
}
finally
{
if (writeStream != null)
{
writeStream.Close();
}
if (readStream != null)
{
readStream.Close();
}
}
return(success);
}
/// <summary>
/// 当下载的状态为错误时，可由此获得相关的错误信息
/// </summary>
internal DownloadInfo(DownloadState downloadState, DownloadFileInfo downloadingFile)
{
DownloadState = downloadState;
DownloadingFile = downloadingFile;
}
