3.2.4 C代码实现
客户端后台代码如下：
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <netdb.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
//设备地址，以实际为准
#define DEVIP "10.129.250.151"
//设备web远程端口，默认80，以实际为准
#define WEBPORT 80
//缓冲区最大字节数
#define MAXDATASIZE 10240
int main(int argc, char *argv[])
{
int sockfd, numbytes;
int apilen;
char buf[MAXDATASIZE];
char apistr[256];
struct hostent *he;
struct sockaddr_in server_addr;
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket error");
exit(1);
}
memset(&server_addr, 0, sizeof(struct sockaddr_in));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(WEBPORT);
server_addr.sin_addr.s_addr = inet_addr(DEVIP);
if(connect(sockfd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) {
perror("connect error");
close(sockfd);
exit(1);
}
memset(apistr,0,256);
strcpy(apistr, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<Control attribute=\"Query\">\n<DeviceInfo/>\n</Control>\n");
apilen = strlen(apistr);
memset(buf, 0, MAXDATASIZE);
sprintf(buf, "POST /xml HTTP/1.1\nContent-Type:text/html\nHost:%s:%d\nContent-Length:%d\n\n%s",DEVIP,WEBPORT,apilen,apistr);
numbytes = send(sockfd, buf, strlen(buf), 0);
printf("send:%s\n",buf);
memset(buf, 0, MAXDATASIZE);
numbytes = recv(sockfd,buf, MAXDATASIZE,0);
if(numbytes<=0){
printf("recv failure\n");
close(sockfd);
exit(1);
}
printf("recv:%s\n",buf);
close(sockfd);
return 0;
}
可以保存成helloworld.c文件，编译：gcc –g –o helloworld helloworld.c，生成可执行文件helloworld。然后直接运行./helloworld即可，测试可用。