微信小程序基于腾讯云对象存储的图片上传

/// <summary>
/// 文件流上传
/// 说明: 酷客多小程序
/// 其中分片上传使用SliceUploadInit SliceUploadData SliceUploadFinihs
/// </summary>
/// <param name="bucketName">bucket名称</param>
/// <param name="remotePath">远程文件路径</param>
/// <param name="localPath">本地文件路径</param>
/// <param name="parameterDic">参数Dictionary</param>
/// <returns></returns>
public string UploadFile(string bucketName, string remotePath, Stream file, string filename,Dictionary<string, string> parameterDic = null)
{
if (remotePath.EndsWith("/"))
{
return constructResult(ERRORCode.ERROR_CODE_PARAMETER_ERROE, "file path can not end with '/'");
} string bizAttribute = "";
if (parameterDic != null && parameterDic.ContainsKey(CosParameters.PARA_BIZ_ATTR))
bizAttribute = parameterDic[CosParameters.PARA_BIZ_ATTR]; int insertOnly = ;
if (parameterDic != null && parameterDic.ContainsKey(CosParameters.PARA_INSERT_ONLY))
{
try
{
insertOnly = Int32.Parse(parameterDic[CosParameters.PARA_INSERT_ONLY]);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return constructResult(ERRORCode.ERROR_CODE_PARAMETER_ERROE, "parameter insertOnly value invalidate");
}
}
return Upload(bucketName, remotePath, file, filename, bizAttribute, insertOnly); }

/// <summary>
/// 单个文件上传
/// 说明: 酷客多小程序
/// <param name="bucketName">bucket名称</param>
/// <param name="remotePath">远程文件路径</param>
/// <param name="localPath">本地文件路径</param>
/// <param name="biz_attr">biz_attr属性</param>
/// <param name="insertOnly">同名文件是否覆盖</param>
/// <returns></returns>
public string Upload(string bucketName, string remotePath, Stream file,string filename,
string bizAttribute = "", int insertOnly = )
{ var url = generateURL(bucketName, remotePath);
var sha1 = SHA1.GetFileSHA1(file);
var data = new Dictionary<string, object>();
data.Add("op", "upload");
data.Add("sha", sha1);
data.Add("biz_attr", bizAttribute);
data.Add("insertOnly", insertOnly); var expired = getExpiredTime();
var sign = Sign.Signature(appId, secretId, secretKey, expired, bucketName);
var header = new Dictionary<string, string>();
header.Add("Authorization", sign); return httpRequest.SendRequest(url, ref data, HttpMethod.Post, ref header, timeOut, file, filename);
}

#region 直接上传文件流
public string SendRequest(string url, ref Dictionary<string, object> data, HttpMethod requestMethod,
ref Dictionary<string, string> header, int timeOut, Stream file,string filename, long offset = -, int sliceSize = )
{
try
{
//Console.WriteLine("url:" + url);
System.Net.ServicePointManager.Expect100Continue = false;
if (requestMethod == HttpMethod.Get)
{
var paramStr = "";
foreach (var key in data.Keys)
{
paramStr += string.Format("{0}={1}&", key, HttpUtility.UrlEncode(data[key].ToString()));
}
paramStr = paramStr.TrimEnd('&');
url += (url.EndsWith("?") ? "&" : "?") + paramStr;
} request = (HttpWebRequest)HttpWebRequest.Create(url);
request.Accept = CosDefaultValue.ACCEPT;
request.KeepAlive = true;
request.UserAgent = CosDefaultValue.USER_AGENT_VERSION;
request.Timeout = timeOut;
foreach (var key in header.Keys)
{
if (key == "Content-Type")
{
request.ContentType = header[key];
}
else
{
request.Headers.Add(key, header[key]);
}
}
if (requestMethod == HttpMethod.Post)
{
request.Method = requestMethod.ToString().ToUpper();
var memStream = new MemoryStream();
if (header.ContainsKey("Content-Type") && header["Content-Type"] == "application/json")
{
var json = JsonConvert.SerializeObject(data);
var jsonByte = Encoding.GetEncoding("utf-8").GetBytes(json.ToString());
memStream.Write(jsonByte, , jsonByte.Length);
}
else
{
var boundary = "---------------" + DateTime.Now.Ticks.ToString("x");
var beginBoundary = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
var endBoundary = Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
request.ContentType = "multipart/form-data; boundary=" + boundary; var strBuf = new StringBuilder();
foreach (var key in data.Keys)
{
strBuf.Append("\r\n--" + boundary + "\r\n");
strBuf.Append("Content-Disposition: form-data; name=\"" + key + "\"\r\n\r\n");
strBuf.Append(data[key].ToString());
}
var paramsByte = Encoding.GetEncoding("utf-8").GetBytes(strBuf.ToString());
memStream.Write(paramsByte, , paramsByte.Length); memStream.Write(beginBoundary, , beginBoundary.Length); var fileStream = file; const string filePartHeader =
"Content-Disposition: form-data; name=\"fileContent\"; filename=\"{0}\"\r\n" +
"Content-Type: application/octet-stream\r\n\r\n";
var headerText = string.Format(filePartHeader, filename);
var headerbytes = Encoding.UTF8.GetBytes(headerText);
memStream.Write(headerbytes, , headerbytes.Length); if (offset == -)
{
var buffer = new byte[];
int bytesRead;
while ((bytesRead = fileStream.Read(buffer, , buffer.Length)) != )
{
memStream.Write(buffer, , bytesRead);
}
}
else
{
var buffer = new byte[sliceSize];
int bytesRead;
fileStream.Seek(offset, SeekOrigin.Begin);
bytesRead = fileStream.Read(buffer, , buffer.Length);
memStream.Write(buffer, , bytesRead);
}
fileStream.Close(); memStream.Write(endBoundary, , endBoundary.Length);
}
request.ContentLength = memStream.Length;
var requestStream = request.GetRequestStream();
memStream.Position = ;
var tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, , tempBuffer.Length);
memStream.Close(); requestStream.Write(tempBuffer, , tempBuffer.Length);
requestStream.Close(); //Console.WriteLine(strBuf.ToString());
} //Console.WriteLine(request.ContentType.ToString()); var response = request.GetResponse();
using (var s = response.GetResponseStream())
{
var reader = new StreamReader(s, Encoding.UTF8);
return reader.ReadToEnd();
}
}
catch (WebException we)
{
if (we.Status == WebExceptionStatus.ProtocolError)
{
using (var s = we.Response.GetResponseStream())
{
var reader = new StreamReader(s, Encoding.UTF8);
return reader.ReadToEnd();
}
}
else
{
throw we;
}
}
catch (Exception e)
{
throw e;
}
}