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We've been supplied files from a third party supplier with files that contain square brackets in the name, i.e [root.m].js

This is causing the following error: Invalid data, parser failed with code 2

As the parsing fails the request.uri returns / and subsequently the resource fails to load.

The valid characters in an URI are:

     unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"

The other ASCII characters are categorised as following:

      reserved    = gen-delims / sub-delims

      gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
      sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
                  / "*" / "+" / "," / ";" / "="

This is taken from RFC 3986 (Uniform Resource Identifier (URI): Generic Syntax)

Hence square brackets cannot be used as-is. However these can be used with Percent Encoding. I don't know whether Telegraph supports Percent Encoding or not. Please try.

The URI component is using Apple's URLComponents object to break the string into the relevant parts. I think that this is throwing an error when you use some of these characters.

The C HTTP parser that we're using has some functionality for url parsing, we might be able to use that. Would probably make url parsing faster too