public Task Invoke(IDictionary <string, object> env)
{
var request = new OwinRequest(env);
var response = new OwinResponse(env);
var requestPath = Uri.UnescapeDataString(request.Path);
var backgrounds = DataManager.ActualBackgroundStorage;
if (requestPath.StartsWith("/backgrounds/"))
{
if (request.Method != "GET")
{
return(response.RespondMethodNotAllowed());
}
var query = requestPath.Substring("/backgrounds".Length);
if (query.EndsWith("/list"))
{
string path = query.Substring(0, query.Length - "list".Length);
var dir = backgrounds.GetDirectory(path);
try
{
StringBuilder sb = new StringBuilder();
ListBackgroundEntries(dir, sb);
return(response.RespondString(sb.ToString()));
}
catch (FileNotFoundException)
{
return(response.RespondNotFound());
}
}
else if (query == "/listall")
{
StringBuilder sb = new StringBuilder();
ListBackgroundEntries(backgrounds.Root, sb, true);
return(response.RespondString(sb.ToString()));
}
else
{
bool preview = false;
if (query.EndsWith("/preview"))
{
preview = true;
query = query.Substring(0, query.Length - "/preview".Length);
}
try
{
var file = backgrounds.GetFile(query);
var contentType = file.MimeType;
if (!String.IsNullOrEmpty(contentType))
{
response.SetHeader("Content-Type", contentType);
}
return(response.RespondDownloaded(preview ? file.PreviewUri : file.Uri));
}
catch (FileNotFoundException)
{
return(response.RespondNotFound());
}
}
}
else
{
return(next(env));
}
}