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Subject: Re: [boost] [ann] Urdl - a library for downloading web content
From: Christopher Kohlhoff (chris_at_[hidden])
Date: 2009-06-18 07:56:13

Ryan Gallagher wrote:
> After a brief look, one thing that wasn't obvious to me was why
> exactly the url constructor throws boost::system::system_error
> (other than performance of open). I can understand why you'd want
> the open functions to do so and are taking advantage of implicit
> conversion from std::string/char*. However, either letting them
> throw a std::runtime_error derived url_parsing_error exception or
> translating this exception to a system_error with an appropriate
> error_code makes more sense to me.

On reflection, adding new open() overloads that take std::string/char*
does sound better. That way the behaviour will be just like if you open
a std::ifstream with a bogus path.

> Also, what the specific error code would be for a url parsing error
> wasn't clear -- the constructor of url didn't document this from
> what I saw.

So far I was just lazy and used invalid_argument for all errors. Later I
intend to add more specific errors to give more information about what
was wrong with the URL.


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