gsoap：实现线程池处理时获取到客户端的ip

问题：

在使用线程池处理客户端请求时发现不能获取到客户端的ip！

原因：

    由于在server_loop注循环中只把连接字sock加到queue队列中，并没有客户端IP，所以每一次queue回调函数只能取得sock连接字，没有客户端的ip

解决方法：

    在将sock加入queue队列的同时把ip也加入到ips队列中，ips队列的长度和queue相同，而且存的数据下标要相同，取sock处理时也把IP取出来，即可得到了客户端IP

步骤：

    定义全局保存IP地址的变量

    static unsigned long ips[MAX_QUEUE];

    修改 enqueue函数

int enqueue(SOAP_SOCKET sock,unsigned long ip)//添加ip的参数
{
        int status = SOAP_OK;
        int next;
        int ret; 
        if ((ret = MUTEX_LOCK(queue_cs)))
                fprintf(stderr, "MUTEX_LOCK error %d
", ret);
        next = (tail + 1) % MAX_QUEUE;  //1000
        if (head == next)
        {    
                /* don't block on full queue,
                 * 队列已满，return SOAP_EOM */
                status = SOAP_EOM;
        }    
        else 
        {    
                queue[tail] = sock;
                ips[tail] = ip;  //保存ip
                tail = next;
                if ((ret = COND_SIGNAL(queue_cv)))
                        fprintf(stderr, "COND_SIGNAL error %d
", ret);
        }    
        if ((ret = MUTEX_UNLOCK(queue_cs)))
                fprintf(stderr, "MUTEX_UNLOCK error %d
", ret);
        return status;
}

    添加dequeue_ip()函数

unsigned long  dequeue_ip()
{
        unsigned long ip;
        int num=0;
        if(head == 0)
            num = MAX_QUEUE - 1;
        else 
            num = head -1;
        ip = ips[num];
        return ip;
}

修改queue回调函数函数

void *process_queue(void *soap)
{
        struct soap *tsoap = (struct soap*)soap;
        for (;;)
        {
                tsoap->socket = dequeue();
                tsoap->ip = dequeue_ip();//获取相应的ip地址
                if (!soap_valid_socket(tsoap->socket))
                {
#ifdef DEBUG
                        fprintf(stderr, "Thread %d terminating
", (int)(long)tsoap->user);
#endif
                        break;
                }

解决！

测试：

在http_get_handler函数中测试

int http_get_handler(struct soap *soap)
｛
    。。。。。
     fprintf(stderr, "Request accepts connection from IP %d.%d.%d.%d
",
           (int)(soap->ip>>24)&0xFF, (int)(soap->ip>>16)&0xFF,(int) (soap->ip>>8)&0xFF, (int)soap->ip&0xFF);
。。。。。。
}

输出：

Request accepts connection from IP 192.168.1.136
Request accepts connection from IP 192.168.1.136
Thread 3 finished serving request with failure 404
Error 404 fault: SOAP-ENV:Client [no subcode]
"HTTP Error: 404 Not Found"
Detail: [no detail]
Request accepts connection from IP 192.168.1.87
Request accepts connection from IP 192.168.1.87
Request accepts connection from IP 192.168.1.87