server模型代码示例

来源：互联网发布：安全网络知识教育平台编辑：程序博客网时间：2024/05/25 23:57

简单 WEB服务器接受GET请求,返回测试页面
<html><title>test</title><body>this is a test web page</body></html>

启动服务器:(默认全网,8888端口)
./httpserver
绑定ip
./httpserver 192.168.3.131
绑定端口
./httpserver 192.168.3.131 3333

运行实例:
root:/home/vickenyang/myserver# ls
httpserver* httpserver.cpp makefile
root:/home/vickenyang/myserver# make
cc -g -Wall -o httpserver httpserver.cpp
root:/home/vickenyang/myserver# ./httpserver 192.168.3.131 8888
http server start...
http server start successfully :
http server is on. Port:8888
accept request from :172.30.7.196
accept request from :172.30.7.196

root:/home/vickenyang/myserver#

先fork一堆进程,然后用竞争accept方式
./httpserversuper
./httpserversuper 192.168.3.131

//httpserver.cpp

#include<stdio.h>

#include<stdlib.h>

#include<unistd.h>

#include<string.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<arpa/inet.h>

#include<sys/ipc.h>

#define BUFFER_SIZE 65535

#define false 0

#define true 1

//http请求处理函数

//只支持GET请求

void process(int fd)

{

char buffer[BUFFER_SIZE];

int n;

const char http_error_406[] = "HTTP/1.0 406 Not Acceptable ";

const char http_ok[] = "HTTP/1.0 200 OK ";

const char http_html[] = "Content-Type: text/html ";

const char http_content[] = "<html><title>test</title><body>this is a test web page</body></html>";

const char http_content_length[] = "Content=Length:";

const char http_content_close[] = "Connection: close ";

if((n = read(fd,buffer,BUFFER_SIZE))>0)

{

//printf("accept:%s",buffer);

if(strncmp(buffer,"GET",3)==0)

{

int p = 0;

p += sprintf(buffer+p,http_ok);

p += sprintf(buffer+p,http_html);

p += sprintf(buffer+p,http_content_length);

p += sprintf(buffer+p,"%d ",strlen(http_content));

p += sprintf(buffer+p,http_content_close);

p += sprintf(buffer+p," ");

p += sprintf(buffer+p,http_content);

write(fd,buffer,p);

//printf("send:%s",buffer);

}

else

{

write(fd,http_error_406,strlen(http_error_406));

}

close(fd);

}

int main(int argc,char ** argv)

{

int port = 8888;

char * ip ;

ip = "0.0.0.0";

if(argc==2)

{

ip = argv[1];

}

if(argc==3)

{

ip = argv[1];

port = atoi(argv[2]);

}

int listenfd,connfd;

struct sockaddr_in servaddr,cliaddr;

socklen_t len;

pid_t pid;

if((listenfd = socket(AF_INET,SOCK_STREAM,0))<0)

{

printf("http server error! ");

exit(1);

}

printf("http server start... ");

bzero(&servaddr,sizeof(servaddr));

servaddr.sin_family = AF_INET;

servaddr.sin_addr.s_addr = inet_addr(ip);

servaddr.sin_port = htons(port);

if(bind(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr))<0)

{

printf("http server bind %d error! ",port);

exit(1);

}

if(listen(listenfd,20)<0)

{

printf("http server listen error! ");

exit(1);

}

printf("http server start successfully : ");

printf("http server is on. Port:%d ",ntohs(servaddr.sin_port));

fflush(stdout);

//并发服务器

while(true)

{

len = sizeof(cliaddr);

static int accept_max_error = 9;

if((connfd = accept(listenfd,(struct sockaddr *)&cliaddr,&len))<0)

{

accept_max_error --;

printf("http server accept error! ");

fflush(stdout);

if(accept_max_error<0)

{

exit(1);

}

else

{

continue;

}

if((pid = fork())<0)

{

printf("fork error! ");

fflush(stdout);

continue;

}

if(pid==0)

{

//子进程,处理请求

close(listenfd);

//处理请求

process(connfd);

exit(0);

}

else

{

//父进程

printf("accept request from :%s ",inet_ntoa(cliaddr.sin_addr));

fflush(stdout);

close(connfd);

}

#include<stdio.h>

#include<stdlib.h>

#include<unistd.h>

#include<string.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<arpa/inet.h>

#include<fcntl.h>

#include<sys/stat.h>

#include<sys/msg.h>

#include<sys/ipc.h>

//httpserversuper.cpp

#define BUFFER_SIZE 65535

#define MSG_FILE "server.msg"

#define false 0

#define true 1

//http请求处理函数

//只支持GET请求

void process(int fd,int msg)

{

char buffer[BUFFER_SIZE];

int n;

//const char http_error_406[] = "HTTP/1.0 406 Not Acceptable ";

const char http_ok[] = "HTTP/1.0 200 OK ";

const char http_html[] = "Content-Type: text/html ";

const char http_content[] = "<html><title>test</title><body>this is a test web page</body></html>";

const char http_content_length[] = "Content=Length:";

const char http_content_close[] = "Connection: close ";

if((n = read(fd,buffer,BUFFER_SIZE))>0)

{

//printf("accept:%s",buffer);

//if(strncmp(buffer,"GET",3)==0)

{

int p = 0;

p += sprintf(buffer+p,http_ok);

p += sprintf(buffer+p,http_html);

p += sprintf(buffer+p,http_content_length);

p += sprintf(buffer+p,"%d ",strlen(http_content));

p += sprintf(buffer+p,http_content_close);

p += sprintf(buffer+p," ");

//p += sprintf(buffer+p,http_content);

p += sprintf(buffer+p,"<html><body>this is from pid : %d</body></html>",msg);

write(fd,buffer,p);

//printf("send:%s",buffer);

}

//else

//{

// write(fd,http_error_406,strlen(http_error_406));

//}

close(fd);

}

int main(int argc,char ** argv)

{

int port = 8888;

char * ip ;

ip = "0.0.0.0";

if(argc==2)

{

ip = argv[1];

}

if(argc==3)

{

ip = argv[1];

port = atoi(argv[2]);

}

int listenfd,connfd;

struct sockaddr_in servaddr,cliaddr;

socklen_t len;

pid_t pid;

if((listenfd = socket(AF_INET,SOCK_STREAM,0))<0)

{

fprintf(stderr,"http server error! ");

exit(1);

}

fprintf(stdout,"http server start... ");

bzero(&servaddr,sizeof(servaddr));

servaddr.sin_family = AF_INET;

servaddr.sin_addr.s_addr = inet_addr(ip);

servaddr.sin_port = htons(port);

if(bind(listenfd,(struct sockaddr *)&servaddr,sizeof(servaddr))<0)

{

fprintf(stderr,"http server bind %d error! ",port);

exit(1);

}

if(listen(listenfd,20)<0)

{

fprintf(stderr,"http server listen error! ");

exit(1);

}

fprintf(stdout,"http server start successfully : ");

fprintf(stdout,"http server is on. Port:%d ",ntohs(servaddr.sin_port));

fflush(stdout);

//预先fork多个进程

for(int t=0;t<20;t++)

{

if((pid = fork())==0)

{

while(true)

{

//测试竞争是否有效

//sleep(t);

len = sizeof(cliaddr);

if((connfd = accept(listenfd,(struct sockaddr *)&cliaddr,&len))<0)

{

fprintf(stderr,"http server accept error! ");

fflush(stderr);

exit(1);

}

process(connfd,t);

fprintf(stdout,"accept request from :%s ",inet_ntoa(cliaddr.sin_addr));

fflush(stdout);

close(connfd);

}

while(true)

{

len = sizeof(cliaddr);

if((connfd = accept(listenfd,(struct sockaddr *)&cliaddr,&len))<0)

{

fprintf(stderr,"http server accept error! ");

fflush(stderr);

exit(1);

}

//父进程

process(connfd,4);

fprintf(stdout,"accept request from :%s ",inet_ntoa(cliaddr.sin_addr));

fflush(stdout);

close(connfd);

}