linux arm 嵌入式webserver 项目案例

linux arm 嵌入式webserver 项目案例

ihf3

CC = $(CROSS_COMPILE)gcc

CFLAGS += -std=gnu99 -Wall -ljpeg -lappweb

appweb.conf

#
#   appweb.conf - Appweb configuration for the simple server sample
#
ErrorLog "stdout" level=2
#ErrorLog "error.log" size=10MB level=2 backup=5 append anew stamp=1hr
Log                     rx conn=5 first=2 headers=3 body=5 limits=5 size=10K exclude="jpg,gif,png,ico,css,js"
Log                     tx first=3 headers=3 body=5 limits=5 time=6 size=10K exclude="jpg,gif,png,ico,css,js"

Listen *:80
Home			"/etc/appweb"
Documents 		"/var/web"
LoadModulePath	"/lib"

DirectoryIndex index.html

Cache                   1hour
ExitTimeout             10secs
RequestParseTimeout     30secs
InactivityTimeout       30secs
RequestTimeout          40min
SessionTimeout          30secs

MemoryPolicy            restart
LimitBuffer             32K
LimitCache              1MB
LimitCacheItem          512K
LimitChunk              128K
LimitClients            20
LimitConnections        100
LimitFiles              0
LimitKeepAlive          400
LimitMemory             300MB
LimitProcesses          100
LimitRequestsPerClient  200
LimitRequestBody        64MB
LimitRequestForm        32K
LimitRequestHeader      128K
LimitRequestHeaderLines 128 
LimitResponseBody       6GB
LimitSessions           1000
LimitUpload             1GB
LimitUri                64K
LimitWorkers            10

AddHandler              fileHandler html gif jpeg jpg png pdf ico css js txt ""

<if DIR_MODULE>
    Options Indexes
    IndexOrder ascending name
    IndexOptions FancyIndexing FoldersFirst
</if>


# Authorization
#	AuthType basic
#	authpass auth.conf appweb zjh user
#	AuthType digest
#	authpass --cipher md5 auth.conf appweb zjh user
<Route />
	AuthRealm "appweb"
	AuthType digest
	include auth.conf
	
	<Route ^/ihf/>
   		 SetHandler actionHandler
	</Route>
</Route>

#
#   Enable the action handler for simple URI to "C" bindings
#   This is used by the web-form Auth mech
#


<if CGI_MODULE>
	LoadModule cgiHandler libmod_cgi
	AddHandler cgiHandler cgi
	ScriptAlias /cgi-bin/ "$Documents/cgi-bin/"
<else>
    AddHandler errorHandler exe cgi cgi-nph bat cmd pl py
</if>

11

#
#   auth.conf - Authorization data
#


User zjh ecb933d4a576ed38f49f6b8bad0e2f20 user

main.c

#include <appweb.h>
#include <mpr.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <fcntl.h>

// 针对自己的开发板修改Led控制函数
int led_ctl(int ctl, int n)
{
	int fd = open("/dev/led", O_RDWR);
	if (fd < 0)
	{
		perror("open");
		return -1;
	}
	
	if (ioctl(fd, ctl, n) < 0)
	{
		perror("ioctl");
		close(fd);
		return -1;
	}
	
	close(fd);
	return 0;
}

// 针对自己的开发板修改温度获取函数
int get_temp(float *val)
{
#define IOCTL_DS18B20_S_RESET			0x10002
#define IOCTL_DS18B20_S_START			0x10003
#define IOCTL_DS18B20_S_BIT				0x10004
#define IOCTL_DS18B20_G_TEMPERATURE		0x10001

	int bit = 12;
	int tmp;
	int fd = open("/dev/ds18b20", O_RDWR);
	if (fd < 0)
	{
		perror("open");
		return -1;
	}
	
	if (ioctl(fd, IOCTL_DS18B20_S_BIT, &bit) < 0)
	{
		perror("ioctl");
		close(fd);
		return -1;
	}
	
	if (read(fd, &tmp,4) < 0)
	{
		perror("read");
		close(fd);
		return -1;
	}
	*val = tmp;
	*val /= 100;
	
	return 0;
}

static void led_action(HttpConn *conn)
{
    HttpQueue   *q;
	int n, ctl;
	
    q = conn->writeq;
    /* Set the HTTP response status */
    httpSetStatus(conn, 200);

	n = httpGetIntParam(conn, "n", 1);
	ctl = httpGetIntParam(conn, "ctl", 1);
	
	printf("n = %d,ctl = %d\n", n, ctl);
	
	led_ctl(ctl, n);

    httpFinalize(conn);
}

static void temp_action(HttpConn *conn)
{
    HttpQueue   *q;
	float val;
    q = conn->writeq;
    /* Set the HTTP response status */
    httpSetStatus(conn, 200);

    /* Add desired headers. "Set" will overwrite, add will create if not already defined. */
    httpAddHeaderString(conn, "Content-Type", "text/plain");
    httpSetHeaderString(conn, "Cache-Control", "no-cache");

	if (get_temp(&val) == 0)
		httpWrite(q, "%.2f", val);
	else
		httpWrite(q, "Error");

    httpFinalize(conn);
}

int main(int argc, char **argv)
{
    Mpr         *mpr;
    MaAppweb    *appweb;
    MaServer    *server;
	
    if ((mpr = mprCreate(0, NULL, MPR_USER_EVENTS_THREAD)) == 0)
	{
        mprError("Cannot create the web server runtime");
        return -1;
    }
    mprStart();
	
    appweb = maCreateAppweb();
    mprAddRoot(appweb);

    server = maCreateServer(appweb, 0);
    if (maParseConfig(server, "/etc/appweb/appweb.conf", 0) < 0)
	{
        mprError("Cannot parse the config file %s", "appweb.conf");
        return -1;
    }
    httpDefineAction("/ihf/led", led_action);
	httpDefineAction("/ihf/temp", temp_action);

    if (maStartServer(server) < 0) {
        mprError("Cannot start the web server");
        return -1;
    }
    mprServiceEvents(-1, 0);
    maStopServer(server);
    mprRemoveRoot(appweb);
    mprDestroy(MPR_EXIT_DEFAULT);
	
    return 0;
}

嵌入式Web视频监控（开源项目）.doc

mjpg-streamer-r63-mod.tar

别人的库

另外附上基于事件驱动模型的socket函数库。
当有数据可读时，系统就会调用用户注册的函数。
当有新的客户连接时，系统就会调用用户注册的函数。

源码下载地址：https://sourceforge.net/projects/libsocketc/