Function trim

app/server/multipart.cpp:17–22

}

std::string trim(std::string value) {
    auto is_space = [](unsigned char ch) { return std::isspace(ch) != 0; };
    value.erase(value.begin(), std::find_if(value.begin(), value.end(), [&](char ch) { return !is_space(ch); }));
    value.erase(std::find_if(value.rbegin(), value.rend(), [&](char ch) { return !is_space(ch); }).base(), value.end());
    return value;
}

// Extracts a `key="value"` or `key=value` parameter from a header value such as
// `form-data; name="file"; filename="clip.wav"`.