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【HarmonyOS HiSpark Wi-Fi IoT 套件試用連載】基于LwIP的Web Server 的演示與代碼分享

本文來(lái)源電子發(fā)燒友社區(qū)，作者：soon順soon，帖子地址：https://bbs.elecfans.com/jishu_2018138_1_1.html

硬件模塊：
WF-H861-SSA1 WiFi 模組

實(shí)現(xiàn)功能：在上電后進(jìn)入AP 模式，熱點(diǎn)名稱(chēng)：Soon-WiFi-IoT，連接上熱點(diǎn)后用瀏覽器訪問(wèn)http://192.168.10.1/
顯示“Hello Wifi IoT”

http://192.168.10.1/wifiiot
顯示“歡迎訪問(wèn)wifi-iot頁(yè)面”

http://192.168.10.1/error
顯示“404-Page not found”

主要代碼如下

#include
#include
#include
#include
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "wifi/ap_mode.h"
#include "lwip/sockets.h"
const unsigned char htmldata[] = "
<title>Wifi-iot
歡迎訪問(wèn)wifi-iot頁(yè)面
";
const unsigned char hellowifiiot[] = "
Hello Wifi IoT
";
const unsigned char errhtml[] = "
404-Page not found
";
/**
* [url=home.php?mod=space&uid=2666770]@Brief[/url] serve tcp connection
* [url=home.php?mod=space&uid=3142012]@param[/url] conn: connection socket
* @retval None
*/
void http_server(int conn)
{
int buflen = 1500;
int ret;
unsigned char recv_buffer[1500];
/* Read in the request */
ret = read(conn, recv_buffer, buflen);
if (ret <= 0)
{
close(conn);
printf("read failedrn");
return;
}
if (strncmp((char *)recv_buffer, "GET /wifiiot", 9) == 0)
{
write(conn, htmldata, sizeof(htmldata) - 1);
}
else if (strncmp((char *)recv_buffer, "GET /error", 9) == 0)
{
write(conn, errhtml, sizeof(errhtml) - 1);
}
else
{
write(conn, hellowifiiot, sizeof(hellowifiiot) - 1);
}
/* Close connection socket */
close(conn);
}
/**
* @briefhttp_task
* @param None
* @retval None
*/
static void http_task(void)
{
int sock, newconn, size;
struct sockaddr_in address, remotehost;
/* create a TCP socket */
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
printf("can not create socket");
return;
}
/* bind to port 80 at any interface */
address.sin_family = AF_INET;
address.sin_port = htons(80);
address.sin_addr.s_addr = INADDR_ANY;
if (bind(sock, (struct sockaddr *)&address, sizeof(address)) < 0)
{
printf("can not bind socket");
close(sock);
return;
}
/* listen for connections (TCP listen backlog = 1) */
listen(sock, 1);
size = sizeof(remotehost);
while (1)
{
newconn = accept(sock, (struct sockaddr *)&remotehost, (socklen_t *)&size);
if (newconn >= 0)
{
printf("newconn");
http_server(newconn);
}
else
{
close(newconn);
}
}
}
static void *Lwip_Web_Task(const char *arg)
{
(void)arg;
wifi_start_softap();
http_task();
return NULL;
}
static void Lwip_Web_Entry(void)
{
osThreadAttr_t attr = {0};
attr.name = "Lwip_Web_Task";
attr.attr_bits = 0U;
attr.cb_mem = NULL;
attr.cb_size = 0U;
attr.stack_mem = NULL;
attr.stack_size = 8192;
attr.priority = osPriorityNormal;
if (osThreadNew((osThreadFunc_t)Lwip_Web_Task, NULL, &attr) == NULL)
{
printf("Falied to create Lwip_Web_Entry!n");
}
}
SYS_RUN(Lwip_Web_Entry);

復(fù)制代碼

完整代碼，如附件

?lwip_webserver.7z(2.69 KB, 下載次數(shù): 3)

編譯好的測(cè)試bin

?Hi3861_wifiiot_app_allinone.bin(761.04 KB, 下載次數(shù): 5)

參考文章
LwIP之socket應(yīng)用--WebServer和Modbus TCP

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