[issue10860] Handle empty port after port delimiter in httplib

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

>From RFC 3986, section 6.2.3 “Scheme-Based Normalization”:

   The syntax and semantics of URIs vary from scheme to scheme, as
   described by the defining specification for each scheme.
   Implementations may use scheme-specific rules, at further processing
   cost, to reduce the probability of false negatives.  For example,
   because the "http" scheme makes use of an authority component, has a
   default port of "80", and defines an empty path to be equivalent to
   "/", the following four URIs are equivalent:

      http://example.com
      http://example.com/
      http://example.com:/
      http://example.com:80/

IOW, the empty string is not an invalid port.  The patch fixes that.  It includes tests but lacks a doc update.  I think it works for https URIs too, but I’d like a test to make sure.

----------
resolution: invalid -> 
stage: needs patch -> patch review
status: pending -> open
versions: +Python 3.3

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