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#include <mbgl/util/http_header.hpp>
#include <mbgl/util/string.hpp>
#include <regex>
namespace mbgl {
namespace http {
CacheControl CacheControl::parse(const std::string& value) {
std::regex maxAgeRegex(R"((?:[^"]*"[^"]*[^\\]")*[^"]*max-age[\s]*=[\s]*([\d]+).*)");
std::smatch maxAgeMatch;
CacheControl result;
result.mustRevalidate = value.find("must-revalidate") != std::string::npos;
if (std::regex_match(value, maxAgeMatch, maxAgeRegex) && maxAgeMatch.size() == 2) {
result.maxAge = ::atoll(maxAgeMatch[1].str().c_str());
}
return result;
}
optional<Timestamp> CacheControl::toTimePoint() const {
return maxAge ? util::now() + Seconds(*maxAge) : optional<Timestamp>{};
}
optional<Timestamp> parseRetryHeaders(const optional<std::string>& retryAfter,
const optional<std::string>& xRateLimitReset) {
if (retryAfter) {
try {
auto secs = std::chrono::seconds(std::stoi(*retryAfter));
return std::chrono::time_point_cast<Seconds>(std::chrono::system_clock::now() + secs);
} catch (...) {
return util::parseTimestamp((*retryAfter).c_str());
}
} else if (xRateLimitReset) {
try {
return util::parseTimestamp(std::stoi(*xRateLimitReset));
} catch (...) {
return {};
}
}
return {};
}
} // namespace http
} // namespace mbgl
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