#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <winsock2.h>
#include <ws2tcpip.h>

#pragma comment(lib, "ws2_32.lib")

#define BUFFER_SIZE 4096 // バッファサイズを増やす

int main() {
    // 初期化
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        fprintf(stderr, "WSAStartup failed\n");
        return 1;
    }

    // サーバーの情報
    const char* serverHost = "www5e.biglobe.ne.jp";
    const char* serverPort = "80";
    const char* resource = "/~develop/c/CharIsNumber.c";

    // HTTPリクエストの生成
    char request[256];
    sprintf(request, "GET %s HTTP/1.1\r\nHost: %s\r\nConnection: close\r\n\r\n", resource, serverHost);

    // サーバーアドレスの解決
    struct addrinfo hints, * result;
    memset(&hints, 0, sizeof(hints));
    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;
    if (getaddrinfo(serverHost, serverPort, &hints, &result) != 0) {
        fprintf(stderr, "getaddrinfo failed\n");
        WSACleanup();
        return 1;
    }

    // ソケットの作成
    SOCKET clientSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
    if (clientSocket == INVALID_SOCKET) {
        fprintf(stderr, "socket creation failed\n");
        freeaddrinfo(result);
        WSACleanup();
        return 1;
    }

    // サーバーに接続
    if (connect(clientSocket, result->ai_addr, (int)result->ai_addrlen) == SOCKET_ERROR) {
        fprintf(stderr, "connection failed\n");
        closesocket(clientSocket);
        freeaddrinfo(result);
        WSACleanup();
        return 1;
    }

    // HTTPリクエストの送信
    send(clientSocket, request, (int)strlen(request), 0);

    // レスポンスの受信と表示
    char buffer[BUFFER_SIZE];
    int bytesRead;
    while ((bytesRead = recv(clientSocket, buffer, BUFFER_SIZE - 1, 0)) > 0) {
        buffer[bytesRead] = '\0';

        // UTF-8エンコーディングでデータを表示
        printf("%s", buffer);
    }

    // 後始末
    closesocket(clientSocket);
    freeaddrinfo(result);
    WSACleanup();

    return 0;
}