/// <summary>
/// 请求上传图片API接口
/// </summary>
/// <param name="requestUri">API请求的uri</param>
/// <param name="httpMethod">API的请求方式</param>
/// <param name="requestParams">API的请求参数</param>
/// <param name="imageParam">图片参数</param>
private void AsyncRequestAPIWithFile(string requestUri, string httpMethod, Dictionary<string, object> requestParams, FileSyncAPIRequestFileParam fileParam)
{
HttpWebRequest request = null;
FileSyncAPIRequestState state = new FileSyncAPIRequestState();
try
{
requestUri = FileSyncUtility.AddParametersToURL(requestUri, requestParams);
request = (HttpWebRequest)WebRequest.Create(new Uri(requestUri));
boundary = "----------" + DateTime.Now.Ticks.ToString("x");
byte[] beginBoundary = Encoding.UTF8.GetBytes(string.Format("--{0}\r\n", boundary));
string fileTemplate = "Content-Disposition: form-data; name=\"file\"; filename=\"{0}\"\r\nContent-Type: application/octet-stream\r\n\r\n";
byte[] bfile = Encoding.UTF8.GetBytes(String.Format(fileTemplate, fileParam.FileKey));
byte[] endBoundary = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
request.Method = httpMethod;
request.ContentType = "multipart/form-data; boundary=" + boundary;
request.ContentLength = beginBoundary.Length + bfile.Length + fileParam.FileData.Length + endBoundary.Length;
request.AllowWriteStreamBuffering = false;
request.Timeout = 300000;
state.request = request;
state.requestParams = requestParams;
state.fileParam = fileParam;
state.beginBoundary = beginBoundary;
state.bfile = bfile;
state.endBoundary = endBoundary;
request.BeginGetRequestStream(new AsyncCallback(RequestReadyWithFile), state);
}
catch (Exception ex)
{
if (DownloadStringCompleted != null)
{
FileSyncError error = new FileSyncError();
error.error_code = requestErrorDomain;
error.error_msg = "A Error Occurred While Creating HTTP Web Request. " + ex.Message;
//System.Windows.Deployment.Current.Dispatcher.BeginInvoke(delegate()
// {
if (DownloadStringCompleted != null)
{
DownloadStringCompleted(this, new FileSyncRequestResultEventArgs(request == null ? null : request.Address, FileSyncAPIRequestResult.Fail, error) { RequestParams = requestParams });
}
// });
}
}
}
/// <summary>
/// 判断是否是上传文件
/// </summary>
private FileSyncAPIRequestFileParam IsUploadFile(Dictionary<string, object> requestParams)
{
FileSyncAPIRequestFileParam fileParam = null;
foreach (KeyValuePair<string, object> param in requestParams)
{
FileInfo fileTemp = param.Value as FileInfo;
if (fileTemp != null)
{
fileParam = new FileSyncAPIRequestFileParam();
fileParam.FileKey = param.Key;
using (FileStream stream = new FileStream(fileTemp.FullName, FileMode.Open))
{
byte[] bytes = new byte[stream.Length];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(bytes, 0, bytes.Length);
fileParam.FileData = bytes;
}
}
}
return fileParam;
}
