Re: [Bug-wget] Overly permissive hostname matching

[Ángel González]

On 20/03/14 22:52, Tim Rühsen wrote:
> I broke out the public suffix code together and created a first go (really very
> quick, distcheck fails - couldn't figure out this evening).
>
> https://github.com/rockdaboot/libpsl
>
> The first step was a psl_is_tld() function.
> There is a test case for some major things (wildcards, exceptions).

So, your public api seems to be this:

psl_ctx_t *psl_load_file(const char *fname);

void psl_free(psl_ctx_t **psl)

int psl_is_tld(const psl_ctx_t *psl, const char *domain)

Fisrt, I wouldn't call the function is_tld(), not just because tlds 
simply won't have any dot inside, (just extract the last label in a DNS 
name)* since there are more ambiguous cases. I would name it 
is_public(), defining it as “one domain under which anyone* can register 
a subdomain”. Additionally, I think there should be a function to 
extract the public suffix from a given domain. Both functions should 
take a flags argument. The immediate use I foresee is to choose whether 
private registries should be taken into account or not. (a private 
registry is a domain used for the public but not owned by a registry, 
dyndns.org and blogspot.com are examples of that) * "anyone" understood 
as a random person unaffiliated with the owner of the parent domain, 
notwithstanding any condition that such "anyone" is required to fulfill 
in order to register it (such as residing in a given region or having 
payed certain fees). PS: It's funny to see 1994 rfc1591 talking about 
TLDs and saying «It is extremely unlikely that any other TLDs will be 
created.»