public SmugglerExporter(DocumentDatabase database, ExportOptions options)
{
this.database = database;
this.options = options;
FillExportTypes();
}
public HttpResponseMessage Export(ExportOptions options)
{
if (options == null)
return GetEmptyMessage(HttpStatusCode.BadRequest);
var headers = CurrentOperationContext.Headers.Value;
var user = CurrentOperationContext.User.Value;
return new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new PushStreamContent((stream, content, transportContext) => StreamToClient(stream, options, headers, user))
{
Headers =
{
ContentType = new MediaTypeHeaderValue("application/json") { CharSet = "utf-8" }
}
}
};
}
private void StreamToClient(Stream stream, ExportOptions options, Lazy<NameValueCollection> headers, IPrincipal user)
{
var old = CurrentOperationContext.Headers.Value;
var oldUser = CurrentOperationContext.User.Value;
try
{
CurrentOperationContext.Headers.Value = headers;
CurrentOperationContext.User.Value = user;
Database.TransactionalStorage.Batch(accessor =>
{
var bufferStream = new BufferedStream(stream, 1024 * 64);
using (var cts = new CancellationTokenSource())
using (var timeout = cts.TimeoutAfter(DatabasesLandlord.SystemConfiguration.DatabaseOperationTimeout))
using (var streamWriter = new StreamWriter(bufferStream))
using (var writer = new JsonTextWriter(streamWriter))
{
writer.WriteStartObject();
writer.WritePropertyName("Results");
writer.WriteStartArray();
var exporter = new SmugglerExporter(Database, options);
exporter.Export(item => WriteToStream(writer, item, timeout), cts.Token);
writer.WriteEndArray();
writer.WriteEndObject();
writer.Flush();
bufferStream.Flush();
}
});
}
finally
{
CurrentOperationContext.Headers.Value = old;
CurrentOperationContext.User.Value = oldUser;
}
}
