block_page.hpp File Reference

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Namespaces
namespace	BlockPage

Functions
static std::string	load_logo_base64 ()
std::string	BlockPage::make (const std::string &host, const std::string &type)

Function Documentation

load_logo_base64()

std::string load_logo_base64 ( )

inlinestatic

Definition at line 28 of file block_page.hpp.

                                           {
    static std::string cached;
    static bool loaded = false;
    if (loaded) return cached;
    loaded = true;
 
    std::ifstream f("/usr/share/BastionGuard/data/logo.png", std::ios::binary);
    if (!f) return cached;
 
    std::ostringstream ss;
    ss << f.rdbuf();
    const std::string raw = ss.str();
    if (raw.empty()) return cached;
 
    static constexpr char b64[] =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    std::string out;
    out.reserve(((raw.size() + 2) / 3) * 4);
    for (std::size_t i = 0; i < raw.size(); i += 3) {
        const unsigned char a = static_cast<unsigned char>(raw[i]);
        const unsigned char b = (i+1 < raw.size()) ? static_cast<unsigned char>(raw[i+1]) : 0;
        const unsigned char c = (i+2 < raw.size()) ? static_cast<unsigned char>(raw[i+2]) : 0;
        out += b64[(a >> 2) & 0x3F];
        out += b64[((a << 4) | (b >> 4)) & 0x3F];
        out += (i+1 < raw.size()) ? b64[((b << 2) | (c >> 6)) & 0x3F] : '=';
        out += (i+2 < raw.size()) ? b64[c & 0x3F] : '=';
    }
    cached = "data:image/png;base64," + out;
    return cached;
}

References load_logo_base64().

Referenced by load_logo_base64(), and BlockPage::make().