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Allow colon within path segments

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Allow `cowboy_router:compile` to handle colon characters within
path segments, rather than exiting with `badarg`.  This is allowed
via RFC 7230 2.7 -> [RFC 3986 3.3](https://tools.ietf.org/html/rfc3986#section-3.3):

```
      segment       = *pchar
      segment-nz    = 1*pchar
      segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" )
                    ; non-zero-length segment without any colon ":"

      pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
```
This commit is contained in:
Paul Fisher 2015-12-22 12:19:28 -06:00 • committed by Loïc Hoguin
parent 7cb3a9dbda
commit 82cd22a88b
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GPG key ID: 8A9DF795F6FED764
2 changed files with 16 additions and 5 deletions
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3
src/cowboy_router.erl
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@ -101,12 +101,11 @@ compile_rules(<< S, Rest/bits >>, S, Segments, Rules, <<>>) ->
compile_rules(Rest, S, Segments, Rules, <<>>);
compile_rules(<< S, Rest/bits >>, S, Segments, Rules, Acc) ->
compile_rules(Rest, S, [Acc|Segments], Rules, <<>>);
%% Colon on path segment start is special, otherwise allow.
compile_rules(<< $:, Rest/bits >>, S, Segments, Rules, <<>>) ->
{NameBin, Rest2} = compile_binding(Rest, S, <<>>),
Name = binary_to_atom(NameBin, utf8),
compile_rules(Rest2, S, Segments, Rules, Name);
compile_rules(<< $:, _/bits >>, _, _, _, _) ->
error(badarg);
compile_rules(<< $[, $., $., $., $], Rest/bits >>, S, Segments, Rules, Acc)
when Acc =:= <<>> ->
compile_rules(Rest, S, ['...'|Segments], Rules, Acc);