stats.narInfoRead++;

    stats.narInfoRead++;

protected:

#include "nar-info.hh"

struct S3Error : public Error
{
    Aws::S3::S3Errors err;
    S3Error(Aws::S3::S3Errors err, const FormatOrString & fs)
        : Error(fs), err(err) { };
};

        throw Error(format("AWS error: %1%") % outcome.GetError().GetMessage());

        throw S3Error(
            outcome.GetError().GetErrorType(),
            format("AWS error: %1%") % outcome.GetError().GetMessage());

}
/* This is a specialisation of isValidPath() that optimistically
   fetches the .narinfo file, rather than first checking for its
   existence via a HEAD request. Since .narinfos are small, doing a
   GET is unlikely to be slower than HEAD. */
bool S3BinaryCacheStore::isValidPath(const Path & storePath)
{
    try {
        readNarInfo(storePath);
        return true;
    } catch (S3Error & e) {
        if (e.err == Aws::S3::S3Errors::NO_SUCH_KEY) return false;
        throw;
    }

    bool isValidPath(const Path & storePath) override;