/// <summary>
/// 将网盘的文件异步转换成秒传数据文件（将产生一个原文件名.symbollink的文件）
/// </summary>
/// <param name="path">原文件路径</param>
/// <param name="callback">回调函数</param>
/// <param name="dst_path">保存的文件名</param>
/// <param name="state">附加参数</param>
public void ConvertToSymbolLinkAsync(string path, ObjectMetaCallback callback = null, string dst_path = null, object state = null)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
ThreadPool.QueueUserWorkItem(delegate
{
if (_enable_function_trace)
{
_trace.TraceInfo("BaiduPCS.ConvertToSymbolLinkAsync called: string path=" + path + "ObjectMetaCallback callback=" + callback?.ToString() + ", string dst_path=" + dst_path);
}
var url = GetLocateDownloadLink(path);
if (url.Length == 0)
{
_trace.TraceWarning("Locate url length is zero");
callback?.Invoke(false, new ObjectMetadata(), state);
return;
}
var ns = new NetStream();
ns.RetryTimes = 3;
ns.CookieKey = _auth.CookieIdentifier;
try
{
var buffer = new byte[BUFFER_SIZE];
var md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
int rbytes, total = 0;
ns.HttpGet(url[0]);
var content_length = ns.HTTP_Response.ContentLength;
if (content_length < VALIDATE_SIZE)
{
_trace.TraceWarning("Content_length is too small, exited");
callback?.Invoke(false, new ObjectMetadata(), state);
return;
}
var stream = ns.ResponseStream;
do
{
rbytes = stream.Read(buffer, 0, BUFFER_SIZE);
rbytes = (int)Math.Min(VALIDATE_SIZE - total, rbytes);
md5.TransformBlock(buffer, 0, rbytes, buffer, 0);
total += rbytes;
} while (rbytes > 0 && total < VALIDATE_SIZE);
md5.TransformFinalBlock(buffer, 0, 0);
var slice_md5 = util.Hex(md5.Hash);
//从response处获取其他参数
var content_md5 = ns.HTTP_Response.Headers["Content-MD5"];
var content_crc32 = ns.HTTP_Response.Headers["x-bs-meta-crc32"];
uint int_crc32 = uint.Parse(content_crc32);
content_crc32 = int_crc32.ToString("X2").ToLower();
if (string.IsNullOrEmpty(content_crc32) || string.IsNullOrEmpty(content_md5))
{
_trace.TraceWarning("Empty content_crc32 or content_md5 detected, pls report this status to developer by opening new issue");
callback?.Invoke(false, new ObjectMetadata(), state);
}
//尝试发送rapid upload请求
var temp_path = "/BaiduCloudSyncCache/temp-rapid-upload-request-" + Guid.NewGuid().ToString();
var rapid_upload_info = RapidUploadRaw(temp_path, (ulong)content_length, content_md5, content_crc32, slice_md5);
DeletePath("/BaiduCloudSyncCache");
if (string.IsNullOrEmpty(rapid_upload_info.MD5) || rapid_upload_info.FS_ID == 0)
{
_trace.TraceWarning("Validate check: post rapid upload failed, operation aborted");
callback?.Invoke(false, new ObjectMetadata(), state);
return;
}
//rapid upload通过，整合成json格式的文件上传到服务器
var json = new JObject();
json.Add("content_length", content_length);
json.Add("content_md5", content_md5);
json.Add("content_crc32", content_crc32);
json.Add("slice_md5", slice_md5);
var str_json = JsonConvert.SerializeObject(json);
var bytes_json = Encoding.UTF8.GetBytes(str_json);
var stream_to_write = new MemoryStream();
stream_to_write.Write(bytes_json, 0, bytes_json.Length);
stream_to_write.Seek(0, SeekOrigin.Begin);
if (dst_path == null)
{
dst_path = path + ".symbollink";
}
var file_meta = UploadRaw(stream_to_write, (ulong)bytes_json.Length, dst_path);
stream_to_write.Close();
callback?.Invoke(true, file_meta, state);
}
catch (Exception ex)
{
_trace.TraceError(ex);
}
finally
{
ns.Close();
}
});
}
/// <summary>
/// 将网盘的秒传数据文件异步转成原文件（将产生一个去掉末尾.symbollink的文件）
/// </summary>
/// <param name="path">原文件路径</param>
/// <param name="callback">回调函数</param>
/// <param name="dst_path">保存的文件名</param>
/// <param name="state">附加参数</param>
public void ConvertFromSymbolLinkAsync(string path, ObjectMetaCallback callback = null, string dst_path = null, object state = null)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
ThreadPool.QueueUserWorkItem(delegate
{
if (_enable_function_trace)
{
_trace.TraceInfo("BaiduPCS.ConvertFromSymbolLinkAsync called: string path=" + path + ", ObjectMetaCallback callback=" + callback?.ToString() + ", string dst_path=" + dst_path);
}
var url = GetLocateDownloadLink(path);
if (url.Length == 0)
{
_trace.TraceWarning("Locate url length is zero");
callback?.Invoke(false, new ObjectMetadata(), state);
return;
}
var ns = new NetStream();
ns.RetryTimes = 3;
ns.CookieKey = _auth.CookieIdentifier;
try
{
ns.HttpGet(url[0]);
var response_json = ns.ReadResponseString();
var json = JsonConvert.DeserializeObject(response_json) as JObject;
var content_length = json.Value <ulong>("content_length");
var content_md5 = json.Value <string>("content_md5");
var content_crc32 = json.Value <string>("content_crc32");
var slice_md5 = json.Value <string>("slice_md5");
if (content_length == 0 || string.IsNullOrEmpty(content_md5) || string.IsNullOrEmpty(content_crc32))
{
callback?.Invoke(false, new ObjectMetadata(), state);
return;
}
if (dst_path == null)
{
dst_path = path.EndsWith(".symbollink") ? path.Substring(0, path.Length - 11) : (path + "." + path.Split('.').Last());
}
var data = RapidUploadRaw(dst_path, content_length, content_md5, content_crc32, slice_md5);
callback?.Invoke(true, data, state);
}
catch (Exception ex)
{
_trace.TraceError(ex);
callback?.Invoke(false, new ObjectMetadata(), state);
}
finally
{
ns.Close();
}
});
}