ESP8266 SDK 2.0 学习记录9_esp8266 sdk zalloc-优快云博客

本文链接：https://blog.youkuaiyun.com/cloudstep/article/details/104238015

本文介绍了一个简易HTTP服务器的实现代码，使用C语言编写，详细展示了如何处理客户端请求、设置socket参数、绑定地址、监听连接及响应200 OK状态。服务器在80端口运行，返回静态HTML页面。

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Http Server

实现代码

#define SERVERPORT 80


const char *DefaultPage=
"<html>"
"<head>"
"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />"
"<title>欢迎进入html世界</title>"
"</head>"
"<body>"
"<P>这会是一个很有趣的实验</P>"
"</body>"
"</html>";

/*
"<html>"
"<head><title>Default</title></head>"
"<body>I am Http server!</body>"
"</html>"
;
*/


// 发送200 ok报头
int file_ok(int cfd, long flen)
{
    char *send_buf = zalloc(sizeof(char)*100);
    sprintf(send_buf, "HTTP/1.1 200 OK\r\n");
    send(cfd, send_buf, strlen(send_buf), 0);
    sprintf(send_buf, "Connection: keep-alive\r\n");
    send(cfd, send_buf, strlen(send_buf), 0);
    sprintf(send_buf, "Content-Length: %ld\r\n", flen);
    send(cfd, send_buf, strlen(send_buf), 0);
    sprintf(send_buf, "Content-Type: text/html\r\n");
    send(cfd, send_buf, strlen(send_buf), 0);
    sprintf(send_buf, "\r\n");
    send(cfd, send_buf, strlen(send_buf), 0);
    free(send_buf);
    return 0;
}


void ATaskHttpServer(void *pvParameters)
{

    int iVariableExample = 0;
    int fd = -1;
    int cfd = -1;
    int NetTimerOut = 2000;
    int ret;
    struct sockaddr_in serverAddr;
    struct sockaddr ClientAddr;
    socklen_t ClientAddrlen = sizeof(struct sockaddr);
    char *Httpmsg;
    char *Sendmsg;

    STATION_STATUS StaStatus;
    //等待连接wifi
    do
    {
        StaStatus = wifi_station_get_connect_status();
        vTaskDelay(100);
    } while (StaStatus != STATION_GOT_IP);

    //建立socket
    fd = socket(PF_INET, SOCK_STREAM, 0);
    if (fd == -1)
    {
        printf("get socket fail!\n");
        vTaskDelete(NULL);
        return;
    }

    //设置socket超时时间
    setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &NetTimerOut, sizeof(int));

    //设置socket信息,ip,端口号
    memset(&serverAddr, 0, sizeof(serverAddr));
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = INADDR_ANY;
    serverAddr.sin_port = htons(SERVERPORT);
    serverAddr.sin_len = sizeof(serverAddr);

    //绑定ip信息
    if(bind(fd, (struct sockaddr *)&serverAddr, serverAddr.sin_len) != 0)
    {
        printf("bind socket fail!\n");
        vTaskDelete(NULL);
        return;
    }

    //最大连接数5
    if(listen(fd, 5)!=0)
    {
        printf("listen socket fail!\n");
        vTaskDelete(NULL);
        return;
    }

    Httpmsg = (char *)zalloc(sizeof(char)*1000);
    for (;;)
    {
        //等待客户端连接
        cfd = accept(fd, &ClientAddr, &ClientAddrlen);
        if(cfd != -1)
        {
            printf("HttpClient accept\n");
            ret = recv(cfd, Httpmsg, 1000, 0);
            if (ret > 0)
            {
                printf("HttpClient recv\n");
                printf("%s\n",Httpmsg);
                printf("%d\n",strlen(DefaultPage));
                file_ok(cfd,strlen(DefaultPage));
                send(cfd,DefaultPage,strlen(DefaultPage),0);
            }
            else
            {
                printf("HttpClient data is no!\n");
                /* code */
            }

        }
        //关闭连接
        close(cfd);

    }
    free(Httpmsg);
    vTaskDelete(NULL);
}

void HttpServer_int(void)
{
    xTaskCreate(ATaskHttpServer, "HttpServer", 256, NULL, 4, NULL);
}

串口界面