Portable Class Library (PCL) Version Of HttpUtility.ParseQueryString

Question

Is there a Portable Class Library (PCL) version Of HttpUtility.ParseQueryString contained in System.Web or some code I could use? I want to read a very complex URL.

Answer 1

You can also implement it like this:

public static class HttpUtility
{
    public static Dictionary ParseQueryString(Uri uri)
    {
        var query = uri.Query.Substring(uri.Query.IndexOf('?') + 1); // +1 for skipping '?'
        var pairs = query.Split('&');
        return pairs
            .Select(o => o.Split('='))
            .Where(items => items.Count() == 2)
            .ToDictionary(pair => Uri.UnescapeDataString(pair[0]),
                pair => Uri.UnescapeDataString(pair[1]));
    }
}

Here is a Unit test for that:

public class HttpParseQueryValuesTests
{
    [TestCase("http://www.example.com", 0, "", "")]
    [TestCase("http://www.example.com?query=value", 1, "query", "value")]
    public void When_parsing_http_query_then_should_have_these_values(string uri, int expectedParamCount,
        string expectedKey, string expectedValue)
    {
        var queryParams = HttpUtility.ParseQueryString(new Uri(uri));
        queryParams.Count.Should().Be(expectedParamCount);

        if (queryParams.Count > 0)
            queryParams[expectedKey].Should().Be(expectedValue);
    }
}