static Expression<Func<Widget, bool>> GetNewExpression(bool withParamName)
{
Expression<Func<Thing, bool>> expr = t => t.Stuff.StartsWith("anything");
var widgetParam = withParamName ? Expression.Parameter(typeof(Widget), "w") : Expression.Parameter(typeof(Widget));
var widgetDotThingExpr = Expression.MakeMemberAccess(widgetParam, typeof(Widget).GetTypeInfo().GetDeclaredProperty(nameof(Widget.Thing)));
var newBody = new ParamReplacer().Replace(expr.Parameters[0], widgetDotThingExpr).Visit(expr.Body);
return Expression.Lambda<Func<Widget, bool>>(newBody, widgetParam);
}
public bool TryMatch(RouteMetadata route, HttpListenerContext context, ParamReplacer paramReplacer)
{
try
{
if (context.Request.HttpMethod.Equals(route.HttpMethod, StringComparison.OrdinalIgnoreCase))
{
string pattern = paramReplacer.ReplacePattern(route.Pattern);
bool isPost = context.Request.HttpMethod.Equals("post", StringComparison.OrdinalIgnoreCase);
int argLen = route.MethodParams.Length - (isPost ? 1 : 0);
var match = Regex.Match(context.Request.Url.LocalPath, $"^{pattern}$");
if (match.Success && argLen == match.Groups.Count - 1)
{
Parameters = new object[route.MethodParams.Length];
for (int i = 0; i < argLen; i++)
{
var param = route.MethodParams[i];
Parameters[i] = Convert.ChangeType(match.Groups[param.Name].Value, param.ParameterType);
}
if (isPost)
{
try
{
Parameters[argLen] = route.BodyTransformer.Transform(route.MethodParams[argLen].ParameterType, context.Request.InputStream);
}
catch (Exception e)
{
FatalError = e;
}
}
return(Success = true);
}
}
}
catch (Exception) { }
return(Success = false);
}
