fix broken path in chat example in windows

[disizali]

fix this : #4647

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[Drunpy]

Thanks for the interest in contributing!

I don't think it is the best approach right now since "./index.html" is already declared at const u = ...
also u.pathname should return the same "/index.html".

It's important to note that in Ubuntu 18.04 it's running without problems

[disizali]

Thank you very much and I hope to be able to collaborate on the project in the long run

Unfortunately, this is not the case in Windows, and u.pathname is not same to "./index.html" , it will be :
/C:/Users/Ali/Desktop/deno/std/examples/chat/index.html

[Drunpy]

I see, as you mentioned in #4647 the problem is the same in node. This seems to be within URL parsing rather than in server.ts. I've found this issue with a deeper troubleshooting at this topic, you may drive your solution there. I'm willing to help, just hit me up.

[disizali]

new URL href & pathname are standardized [here] and cannot be changed separately in node or deno ,
problem is first slash in given pathname

in node , a function in url library [here] is provided for convert this kind of file path in windows , which solves this problem .

anyway , currently this file has problems on Windows, and the shortest way to solve is to use ./index.html

alternatives :
in deno fs module itself used this function [here] :

function urlToFilePath(url: URL): string {
  // Since `new URL('file:///C:/a').pathname` is `/C:/a`, remove leading slash.
  return url.pathname.slice(url.protocol == "file:" && isWindows ? 1 : 0);
}

or another approach in node module [ here ]:

and the last solution is to change fs readFile functions behavior to work with file:/// path entirely.

[Drunpy]

I would go with node's approach. Simple because it's already done there and we know it works.