/// <summary>
/// Get message string from Exception
/// </summary>
internal static WebSyncException GetWebSyncException(Exception exception)
{
WebSyncException webSyncException = new WebSyncException(exception.Message);
webSyncException.Type = exception.GetType().ToString();
return(webSyncException);
}
/// <summary>
/// Extract session id and sync stage from header
/// </summary>
//private static SyncContext GetSyncContextFromHeader(HttpRequest httpRequest)
//{
// if (!httpRequest.Headers.ContainsKey("Dotmim-Sync-Step"))
// throw new Exception("No header containing SyncStage");
// if (!httpRequest.Headers.ContainsKey("Dotmim-Sync-SessionId"))
// throw new Exception("No header containing Session Id");
// var stepValue = httpRequest.Headers.First(kvp => kvp.Key == "Dotmim-Sync-Step");
// SyncStage httpStep = (SyncStage)Enum.Parse(typeof(SyncStage), stepValue.Value);
// var sessionIdValue = httpRequest.Headers.First(kvp => kvp.Key == "Dotmim-Sync-SessionId");
// Guid sessionId = Guid.Parse(sessionIdValue.Value);
// SyncContext syncContext = new SyncContext(sessionId);
// syncContext.SyncStage = httpStep;
// return syncContext;
//}
/// <summary>
/// Write exception to output message
/// </summary>
public async Task WriteExceptionAsync(HttpResponse httpResponse, Exception ex)
{
var webx = WebSyncException.GetWebSyncException(ex);
var webXMessage = JsonConvert.SerializeObject(webx);
httpResponse.StatusCode = StatusCodes.Status400BadRequest;
httpResponse.ContentLength = webXMessage.Length;
await httpResponse.WriteAsync(webXMessage);
}
/// <summary>
/// Process a request message with HttpClient object.
/// </summary>
public async Task <T> ProcessRequest <T>(T content, CancellationToken cancellationToken)
{
if (this.BaseUri == null)
{
throw new ArgumentException("BaseUri is not defined");
}
HttpResponseMessage response = null;
T dmSetResponse = default(T);
try
{
if (cancellationToken.IsCancellationRequested)
{
cancellationToken.ThrowIfCancellationRequested();
}
var requestUri = new StringBuilder();
requestUri.Append(this.BaseUri.ToString());
requestUri.Append(this.BaseUri.ToString().EndsWith("/", StringComparison.CurrentCultureIgnoreCase) ? string.Empty : "/");
// Add params if any
if (ScopeParameters != null && ScopeParameters.Count > 0)
{
string prefix = "?";
foreach (var kvp in ScopeParameters)
{
requestUri.AppendFormat("{0}{1}={2}", prefix, Uri.EscapeUriString(kvp.Key),
Uri.EscapeUriString(kvp.Value));
if (prefix.Equals("?"))
{
prefix = "&";
}
}
}
// default handler if no one specified
HttpClientHandler httpClientHandler = this.Handler ?? new HttpClientHandler();
// serialize dmSet content to bytearraycontent
var serializer = BaseConverter <T> .GetConverter(SerializationFormat);
var binaryData = serializer.Serialize(content);
ByteArrayContent arrayContent = new ByteArrayContent(binaryData);
// do not dispose HttpClient for performance issue
if (client == null)
{
client = new HttpClient(httpClientHandler);
}
// add it to the default header
if (this.Cookie != null)
{
client.DefaultRequestHeaders.Add("Cookie", this.Cookie.ToString());
}
HttpRequestMessage requestMessage = new HttpRequestMessage(HttpMethod.Post, requestUri.ToString())
{
Content = arrayContent
};
if (this.CustomHeaders != null && this.CustomHeaders.Count > 0)
{
foreach (var kvp in this.CustomHeaders)
{
requestMessage.Headers.Add(kvp.Key, kvp.Value);
}
}
//request.AddHeader("content-type", "application/json");
if (SerializationFormat == SerializationFormat.Json && !requestMessage.Content.Headers.Contains("content-type"))
{
requestMessage.Content.Headers.Add("content-type", "application/json");
}
response = await client.SendAsync(requestMessage, cancellationToken);
if (cancellationToken.IsCancellationRequested)
{
cancellationToken.ThrowIfCancellationRequested();
}
// get response from server
if (!response.IsSuccessStatusCode)
{
throw new Exception(response.ReasonPhrase);
}
// try to set the cookie for http session
var headers = response?.Headers;
if (headers != null)
{
if (headers.TryGetValues("Set-Cookie", out IEnumerable <string> tmpList))
{
var cookieList = tmpList.ToList();
// var cookieList = response.Headers.GetValues("Set-Cookie").ToList();
if (cookieList != null && cookieList.Count > 0)
{
// Get the first cookie
this.Cookie = CookieHeaderValue.ParseList(cookieList).FirstOrDefault();
}
}
}
using (var streamResponse = await response.Content.ReadAsStreamAsync())
if (streamResponse.CanRead && streamResponse.Length > 0)
{
dmSetResponse = serializer.Deserialize(streamResponse);
}
return(dmSetResponse);
}
catch (Exception e)
{
if (response.Content == null)
{
throw e;
}
try
{
var exrror = await response.Content.ReadAsStringAsync();
WebSyncException webSyncException = JsonConvert.DeserializeObject <WebSyncException>(exrror);
if (webSyncException != null)
{
throw webSyncException;
}
}
catch (WebSyncException)
{
throw;
}
catch (Exception)
{
// no need to do something here, just rethrow the initial error
}
throw e;
}
}
