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Report position where parsing failed; resolves #2168

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Daniel J. Hofmann 2016-04-07 13:22:28 +02:00 committed by Patrick Niklaus
parent 58ebadd7b3
commit 996a27dbd1
1 changed files with 16 additions and 8 deletions
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24
src/server/api/url_parser.cpp
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@ -15,7 +15,6 @@ namespace qi = boost::spirit::qi;
template <typename Iterator, typename Into> //
struct URLParser final : qi::grammar<Iterator, Into>
{
URLParser() : URLParser::base_type(start)
{
alpha_numeral = qi::char_("a-zA-Z0-9");
@ -29,10 +28,10 @@ struct URLParser final : qi::grammar<Iterator, Into>
// Example input: /route/v1/driving/7.416351,43.731205;7.420363,43.736189
start = qi::lit('/') >> service //
>> qi::lit('/') >> qi::lit('v') >> version //
>> qi::lit('/') >> profile //
>> qi::lit('/') >> query; //
start = qi::lit('/') > service //
> qi::lit('/') > qi::lit('v') > version //
> qi::lit('/') > profile //
> qi::lit('/') > query; //
BOOST_SPIRIT_DEBUG_NODES((start)(service)(version)(profile)(query))
}
@ -65,10 +64,19 @@ boost::optional<ParsedURL> parseURL(std::string::iterator &iter, const std::stri
static URLParser<It, ParsedURL()> const parser;
ParsedURL out;
const auto ok = boost::spirit::qi::parse(iter, end, parser, out);
try
{
const auto ok = boost::spirit::qi::parse(iter, end, parser, out);
if (ok && iter == end)
return boost::make_optional(out);
if (ok && iter == end)
return boost::make_optional(out);
}
catch (const qi::expectation_failure<It> &failure)
{
// The grammar above using expectation parsers ">" does not automatically increment the
// iterator to the failing position. Extract the position from the exception ourselves.
iter = failure.first;
}
return boost::none;
}