C++ urljoin equivalent

Python has a function urljoin that takes two URLs and concatenates them intelligently. Is th开发者_如何转开发ere a library that provides a similar function in c++?

urljoin documentation: http://docs.python.org/library/urlparse.html

And python example:

>>> urljoin('http://www.cwi.nl/%7Eguido/Python.html', 'FAQ.html')
'http://www.cwi.nl/%7Eguido/FAQ.html'

I figured it out. I used the library uriparser: http://uriparser.sourceforge.net/ and hastily implemented the function as follows. It does sparse error checking and may leak memory.

std::string urljoin(std::string &base, std::string &relative)
{
    UriParserStateA state;
    UriUriA uriOne;
    UriUriA uriTwo;

    state.uri = &uriOne;

    if (uriParseUriA(&state, base.c_str()) != URI_SUCCESS)
    {
        return "";
    }
    state.uri = &uriTwo;
    if (uriParseUriA(&state, relative.c_str()) != URI_SUCCESS)
    {
        uriFreeUriMembersA(&uriTwo);
        return "";
    }

    UriUriA result;
    if (uriAddBaseUriA(&result, &uriTwo, &uriOne) != URI_SUCCESS)
    {
        uriFreeUriMembersA(&result);
        return "";
    }
    uriFreeUriMembersA(&uriOne);
    uriFreeUriMembersA(&uriTwo);

    int charsRequired;
    uriToStringCharsRequiredA(&result, &charsRequired);
    charsRequired++;

    char *buf = (char*) malloc(charsRequired * sizeof(char)); if (uriToStringA(buf, &result, charsRequired, NULL) != URI_SUCCESS)
        return "";
    uriFreeUriMembersA(&result);

    std::string ret(buf);
    free(buf);

    return ret;
}

The Poco::URI class in the POCO C++ Libraries can do that (see the resolve() member function).

Short answer, not really.

You would have to parse the string and replace the tail. This would be fairly easy using, for example, boost::regex.