404错误页面

在C++中，我们可以使用Boost库来处理HTTP请求和响应，当服务器返回一个404错误时，我们可以创建一个自定义的类，该类包含一个静态成员函数，该函数接收一个HTTP请求对象，并返回一个HTTP响应对象，以下是一个简单的示例：

#include <boost/asio.hpp>
#include <string>
#include <iostream>
#include <fstream>
#include <sstream>
#include <algorithm>
#include <cctype>
#include <locale>
#include <codecvt>
#include <cstdint>
#include <cstddef>
#include <iterator>
#include <limits>
#include <vector>
#include <array>
#include <deque>
#include <list>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <memory>
#include <tuple>
#include <bitset>
#include <functional>
#include <numeric>
#include <chrono>
#include <condition_variable>
#include <future>
#include <mutex>
#include <regex>
#include <system_error>
#include <stdexcept>
#include <tuple>
#include <type_traits>
#include <utility>
#include <any>
#include <optional>
#include <variant>
#include <initializer_list>
#include <forward_list>
#include <istreambuf_iterator>
#include <ostreambuf_iterator>
#include <complex>
#include <valarray>
#include <iterator>
#include <numeric_limits>
#include <ratio>
#include <deque>
#include <stack>
#include <queue>
#include <bitset>
#include <cmath>
#include <ctime>
#include <cstdlib> // atoi(), atol(), strtol(), strtoul(), strtod(), strtof(), strtoll(), strtoull(), strtogf(), strtold() etc.) std::abs(x), std::round(x), std::floor(x), std::ceil(x), std::log2(x), std::log10(x), std::exp2(x), std::sqrt(x) std::pow(x, y) std::lround(x) std::lrint(x) std::llrint(x) std::llround(x) std::ullround(x) std::stof(x), std::stod(x), std::stoul(x), std::stoll(x), std::stoull(x), std::stoimax(x), std::stoq(x), std::stoa(x), std::stoll10(x), std::stodbl(x), std::stold(x), std::to_string(x). see also: http://www.cplusplus.com/reference/string/stof/ http://www.cplusplus.com/reference/string/stod/ http://www.cplusplus.com/reference/string/stoul/ http://www.cplusplus.com/reference/string/stoll/ http://www.cplusplus.com/reference/string/stoull/ http://www.cplusplus.com/reference/string/stoimax/ http://www.cplusplus.com/reference/string/stoq/ http://www.cplusplus.com/reference/string/stoa/ http://www.cplusplus.com/reference/string/stoll10/ http://www.cplusplus.com/reference/string/stodbl/ http://www.cplusplus.com/reference/string/stold/ https://stackoverflow.com/questions/36579669/how-do-i-convert-a-double-to-an-integer-in-c11 see also: http://wwww20.pl/~kamil-babiak