public void SingleDownload(SingleDownloadReq downloadReq, DefaultApi apiInstance)
{
// 调用 osdownload API
FileOsdownloadReq osdownloadBody = new FileOsdownloadReq();
osdownloadBody = downloadReq;
FileOsdownloadRes osdownloadResult = apiInstance.FileOsdownloadPost(osdownloadBody);
Console.WriteLine(osdownloadResult);
// 根据服务器返回的对象存储请求，向对象存储下载数据
String filePath = downloadReq.SavePath + "\\" + osdownloadResult.Name;
if (!Directory.Exists(downloadReq.SavePath))
{
//如果不存在，创建它
Directory.CreateDirectory(downloadReq.SavePath);
}
List <String> headers = new List <String>();
List <String> authRequestList = osdownloadResult.Authrequest;
for (int i = 2; i < authRequestList.Count; ++i)
{
String header = authRequestList[i];
headers.Add(header);
}
HttpWebResponse ossResult = ossHttpHelper.SendReqToOSS(authRequestList[0], authRequestList[1], headers, null);
//写入数据
using (FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate))
{
Stream fileContent = ossResult.GetResponseStream();
const int bufferLen = 4096;
byte[] buffer = new byte[bufferLen];
int count = 0;
while ((count = fileContent.Read(buffer, 0, bufferLen)) > 0)
{
fs.Write(buffer, 0, count);
}
}
}
/// <summary>
/// 获取文件下载信息
/// </summary>
/// <returns>文件下载信息</returns>
private string GetFileDownloadResponse(SingleDownloadReq downloadReq, EASAPIModel model)
{
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create($"{model.Host}/api/v1/file/osdownloadext");
request.Method = "Post";
request.ContentType = "application/json";
request.Headers.Add("Authorization", $"Bearer {model.TokenId}");
var param = JsonConvert.SerializeObject(downloadReq);
var bytes = Encoding.UTF8.GetBytes(param);
Stream reqStream = request.GetRequestStream();
reqStream.Write(bytes, 0, bytes.Length);
reqStream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
int resCode = (int)response.StatusCode;
// 若为错误返回码则抛出异常
if (resCode < 200 || resCode >= 300)
{
throw new Exception();
}
Stream ResStream = response.GetResponseStream();
string resBody = string.Empty;
using (StreamReader reader = new StreamReader(ResStream, Encoding.UTF8))
{
resBody = reader.ReadToEnd();
}
return(resBody);
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 获取文件信息(路径)
/// </summary>
/// <param name="rootPath">文件根目录</param>
/// <param name="fileId">文件Id</param>
/// <param name="rev">版本</param>
/// <returns>文件信息</returns>
public string SingleFileDownload(string rootPath, string fileId, string rev, string token)
{
try
{
EASAPIModel model = GetAPIModel(token);
// 设置传参
SingleDownloadReq body = new SingleDownloadReq();
string savePath = $"{rootPath}\\Files\\{fileId}";
if (!string.IsNullOrEmpty(rev))
{
body.Rev = rev;
savePath = $"{savePath}/{rev}";
}
body.Docid = model.DocId;
body.SavePath = savePath;
body.Usehttps = false;
// 文件信息
string resBody = GetFileDownloadResponse(body, model);
var dynamicObj = JsonConvert.DeserializeObject <dynamic>(resBody);
string method = dynamicObj["authrequest"][0].Value;
string url = dynamicObj["authrequest"][1].Value;
string fileName = dynamicObj["name"].Value;
string filePath = $"{savePath}\\{fileName}";
//如果不存在，创建它
if (!Directory.Exists(savePath))
{
Directory.CreateDirectory(savePath);
}
List <string> headers = new List <string>();
for (int i = 2; i < dynamicObj["authrequest"].Count; ++i)
{
headers.Add(dynamicObj["authrequest"][i].Value);
}
OSSHelper ossHttpHelper = new OSSHelper();
HttpWebResponse ossResult = ossHttpHelper.SendReqToOSS(method, url, headers, null);
Stream fileContent = ossResult.GetResponseStream();
const int bufferLen = 50 * 1024 * 1024;
if (File.Exists(filePath))
{
//写入数据
using (FileStream fs = new FileStream(filePath, FileMode.Truncate))
{
byte[] buffer = new byte[bufferLen];
int count = 0;
while ((count = fileContent.Read(buffer, 0, bufferLen)) > 0)
{
fs.Write(buffer, 0, count);
}
fs.Dispose();
}
}
else
{
//写入数据
using (FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate))
{
byte[] buffer = new byte[bufferLen];
int count = 0;
while ((count = fileContent.Read(buffer, 0, bufferLen)) > 0)
{
fs.Write(buffer, 0, count);
}
fs.Dispose();
}
}
return(filePath);
}
catch (Exception e)
{
throw e;
}
}
