Hash fragment is getting moved to the end of the Url

[jovball]

I am using the Flurl library to build urls but running into one confusing issue. I have a url with a hash fragment such as "https://example.com/#/myFragment". If I use either SetQueryParam or AppendPathSegment, the values will be added after the domain and the hash fragment will be moved to the end. ` var baseUrl = "https://example.com/#/myFragment"; var targetUrl = baseUrl.AppendPathSegment("abc"); //expecting "https://example.com/#/myFragment/abc" but getting "https://example.com/abc#/myFragment/"; Console.WriteLine(targetUrl);

targetUrl = baseUrl.SetQueryParam("x", "123"); //expecting "https://example.com/#/myFragment?x=123" but getting "https://example.com/?x=123#/myFragment/"; Console.WriteLine(targetUrl); ` I can work around this using Url.Combine and more basic string interpolation but it seems like a flaw in the library.

[tmenier]

This is the expected behavior. AppendPathSegment and SetQueryParam refer to the path and query components of the URI respectively, and those always appear to the left of the fragment.

https://en.wikipedia.org/wiki/Uniform_Resource_Identifier#Syntax

Flurl has no notion of paths or queries within the fragment because fragments are more of a client-side concern and (as far as I know) there aren't any standards for this. You're probably more likely to find structured fragment building in a client-side library. One possible approach in Flurl is to create a relative Url to represent the fragment and append it when you're done building it:

var fragment = new Url("/myFragment");
fragment.AppendPathSegment(...).SetQueryParam(...)...;
fullUrl.SetFragment(fragment);