【HarmonyOS HiSpark Wi-Fi IoT 套件试用连载】基于LwIP的Web Server 的演示与代码分享

本文来源电子发烧友社区，作者：soon顺soon， 帖子地址：https://bbs.elecfans.com/jishu_2018138_1_1.html

硬件模块：
WF-H861-SSA1 WiFi 模组

实现功能：在上电后进入AP 模式，热点名称：Soon-WiFi-IoT，连接上热点后用浏览器访问http://192.168.10.1/
显示“Hello Wifi IoT”

http://192.168.10.1/wifiiot
显示“欢迎访问wifi-iot页面”

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


主要代码如下

1. #include
2. #include
3. #include
4. #include
5. #include "ohos_init.h"
6. #include "cmsis_os2.h"
7. #include "wifi/ap_mode.h"
8. #include "lwip/sockets.h"
10. const unsigned char htmldata[] = "
14. <title>Wifi-iot

17. 欢迎访问wifi-iot页面

19. ";
20. const unsigned char hellowifiiot[] = "

26. Hello Wifi IoT

28. ";
29. const unsigned char errhtml[] = "

35. 404-Page not found

37. ";
39. /**
40. * [url=home.php?mod=space&uid=2666770]@Brief[/url] serve tcp connection
41. * [url=home.php?mod=space&uid=3142012]@param[/url] conn: connection socket
42. * @retval None
43. */
44. void http_server(int conn)
45. {
46. int buflen = 1500;
47. int ret;
48. unsigned char recv_buffer[1500];
50. /* Read in the request */
51. ret = read(conn, recv_buffer, buflen);
52. if (ret <= 0)
53. {
54. close(conn);
55. printf("read failedrn");
56. return;
57. }
59. if (strncmp((char *)recv_buffer, "GET /wifiiot", 9) == 0)
60. {
61. write(conn, htmldata, sizeof(htmldata) - 1);
62. }
63. else if (strncmp((char *)recv_buffer, "GET /error", 9) == 0)
64. {
65. write(conn, errhtml, sizeof(errhtml) - 1);
66. }
67. else
68. {
69. write(conn, hellowifiiot, sizeof(hellowifiiot) - 1);
70. }
71. /* Close connection socket */
72. close(conn);
73. }
75. /**
76. * @briefhttp_task
77. * @param None
78. * @retval None
79. */
80. static void http_task(void)
81. {
82. int sock, newconn, size;
83. struct sockaddr_in address, remotehost;
85. /* create a TCP socket */
86. if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
87. {
88. printf("can not create socket");
89. return;
90. }
92. /* bind to port 80 at any interface */
93. address.sin_family = AF_INET;
94. address.sin_port = htons(80);
95. address.sin_addr.s_addr = INADDR_ANY;
96. if (bind(sock, (struct sockaddr *)&address, sizeof(address)) < 0)
97. {
98. printf("can not bind socket");
99. close(sock);
100. return;
101. }
103. /* listen for connections (TCP listen backlog = 1) */
104. listen(sock, 1);
105. size = sizeof(remotehost);
106. while (1)
107. {
108. newconn = accept(sock, (struct sockaddr *)&remotehost, (socklen_t *)&size);
109. if (newconn >= 0)
110. {
111. printf("newconn");
112. http_server(newconn);
113. }
114. else
115. {
116. close(newconn);
117. }
118. }
119. }
121. static void *Lwip_Web_Task(const char *arg)
122. {
123. (void)arg;
124. wifi_start_softap();
125. http_task();
126. return NULL;
127. }
129. static void Lwip_Web_Entry(void)
130. {
131. osThreadAttr_t attr = {0};
133. attr.name = "Lwip_Web_Task";
134. attr.attr_bits = 0U;
135. attr.cb_mem = NULL;
136. attr.cb_size = 0U;
137. attr.stack_mem = NULL;
138. attr.stack_size = 8192;
139. attr.priority = osPriorityNormal;
141. if (osThreadNew((osThreadFunc_t)Lwip_Web_Task, NULL, &attr) == NULL)
142. {
143. printf("Falied to create Lwip_Web_Entry!n");
144. }
145. }
147. SYS_RUN(Lwip_Web_Entry);

复制代码

完整代码，如附件
 lwip_webserver.7z(2.69 KB, 下载次数: 3)

编译好的测试bin
 Hi3861_wifiiot_app_allinone.bin(761.04 KB, 下载次数: 5)

参考文章
LwIP之socket应用--WebServer和Modbus TCP