using System;

using System.Collections.Generic;

using System.Collections.Specialized;

using ServiceStack.Text;

using ServiceStack.Web;

namespace ServiceStack

{

public static class RequestExtensions

{

/// <summary>

/// Duplicate Params are given a unique key by appending a #1 suffix

/// </summary>

public static Dictionary<string, string> GetRequestParams(this IRequest request)

{

if (request == null)

throw new ArgumentNullException(nameof(request));

var map = new Dictionary<string, string>();

AddToMap(request.QueryString, map);

if ((request.Verb == HttpMethods.Post || request.Verb == HttpMethods.Put) && request.FormData != null)

{

AddToMap(request.FormData, map);

}

return map;

}

private static void AddToMap(NameValueCollection nvc, Dictionary<string, string> map)

{

for (int index = 0; index < nvc.Count; index++)

{

var name = nvc.GetKey(index);

var values = nvc.GetValues(name); // Only use string name instead of index which returns multiple values

if (name == null) //thank you .NET Framework!

{

if (values?.Length > 0)

map[values[0]] = null;

continue;

}

if (values == null || values.Length == 0)

{

map[name] = null;

}

else if (values.Length == 1)

{

map[name] = values[0];

}

else

{

for (var i = 0; i < values.Length; i++)

{

map[name + (i == 0 ? "" : "#" + i)] = values[i];

}

}

}

}

}

}