Embedded web server subsystem
A control process embedded web server
Shown below embedded web server may be implemented to control remote embedded development board over the network , convenient and practical.
Process Control: browser --- >>> embedded development board
1) the browser sends a command, the development board web server receives the request , in the development board " #boa" Run the web server, the application program configured CGI program calling the specified directory in the paper boa_conf / cam / in (arm-linux-gcc movctl.c -o movctl.cgi);
2) CGI program call other procedures developed board system , to achieve control of the development board ;
<<< --- browser embedded development board
1) development board system returns the control result , by generating HTMI CGI program file -> Web server ;
2) Web server to the network , the browser can receive IP Development Board according to the control of the return result;
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Second embedded web server -> BOA transplant, cgi application library transplant --- >>>
BOA: BOA download server and then decompressed -> Change file .configure cross compiler-Linux- ARM -> the make an application which generates boa, boa_conf profile ;
cgi library: .configure modified cross-compiler Linux- ARM, the make generate libraries libcgi.a moved to / rootfs / lib / lower can;
Boa_conf modify configuration items in the configuration file, such as: designated web interface design documents /web/~.html , menu jump cgi program source directory /web/cam/~.cgi .
Development board running "#boa" , the browser login boards ip -192.168.1.2, you can log in web design interface embedded web server. Then start moving the main body monitoring system "motion -c motion_dist_conf", you can login server interface to obtain monitored moving images and video information.
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Among them, the web interface, get pictures and video surveillance cgi program development
Web interface: the original .html program carried out on the basis of changes, modifications only: "class = " the MENU " href = " /cam/movie.cgi " , ie the interface menu text --- web / cgi run the program after the jump ;
cgi program: main function cgiMain () , the
. 1) Print_File (cgiOut, "../ top.html"); // add head, the print content to cgiOut top.html
2）total = list_pic("/mnt/sd","jpg"); //将图片加入显示列表
3）if (cgiFormSubmitClicked("gopage") == cgiFormSuccess) { //处理用户的选择请求
4）show_pic(start,end,total); //显示图片
5）print_file(cgiOut,"../bottom.html"); //加尾，将bottom.html内容打印到cgiOut
arm-linux-gcc -L ./cgic205/ -lcgi movie.c -o movie.cgi
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嵌入式web服务器程序设计---流程：
移植BOA服务器，移植CGI库 -> 设置网页界面程序 .html、cgi监控程序 -> 配置boa_conf配置文件，指定浏览服务器网页界面文件、及菜单跳转的cgi程序 -> 启动motion 、boa -> 浏览器登录web服务器的ip(开发板ip)即可。