Function zipStreamSize

common/transferprotocol.cpp:255–270

    }

    std::optional<uint64_t> zipStreamSize(const std::vector<SendFile>& files, const std::vector<std::string>& dirs)
    {
        uint64_t total = 22; // end of central directory
        for (const auto& dir : dirs) {
            total += 30 + dir.size(); // local header
            total += 46 + dir.size(); // central directory
        }
        for (const auto& entry : files) {
            total += 30 + entry.relPath.size() + (uint64_t)entry.size + 16; // local header + data + data descriptor
            total += 46 + entry.relPath.size();                             // central directory
        }
        if (total > kZipMaxSize) {
            return std::nullopt;
        }
        return total;
    }

    bool parseMultipart(const std::string& head, uint64_t bodyLen, const std::string& boundary, std::string& outMeta, uint64_t& outFileOffset,
        uint64_t& outFileLen, std::string& outError)