web服务器

来源：互联网发布：手机图片点击放大js 编辑：程序博客网时间：2024/05/30 13:42
//============================================================================// Name        : CExercise.cpp// Author      : Haier// Version     : 0.1// Copyright   : Your copyright notice// Description : webserver in c , Ansi-style//============================================================================#include <stdio.h>#include <string.h>#include <stdlib.h>#include <errno.h>#include <unistd.h>#include <fcntl.h>#include <sys/socket.h>#include <sys/types.h>#include <netinet/in.h>#include <arpa/inet.h>#define PORT 32000int endWith(char *src,char *dst){int srclen=strlen(src);int dstlen=strlen(dst);int i,j;if(srclen<dstlen){return 0;}for(i=srclen-1,j=dstlen-1; i>=0 && j>=0; i--,j--){if(src[i] != dst[j]){return 0;}}return 1;}int main(){int serversockfd,clientsockfd;struct sockaddr_in addr;int addrlen=sizeof(addr);char buffer[2048];char type[256];char filePath[1024];char content[2048*512];char sendBuf[2048*1024];char fileLenth[20];int fileSize;int number;int fd;int i,j;//建立套接字if((serversockfd=socket(AF_INET,SOCK_STREAM,0))<0){printf("%s",strerror(errno));exit(1);}bzero(&addr,sizeof(addr));addr.sin_family=AF_INET;addr.sin_port=htons(PORT);addr.sin_addr.s_addr=inet_addr("127.0.0.1");//绑定端口if(bind(serversockfd,(struct sockaddr*)&addr,sizeof(addr))<0){printf("%s",strerror(errno));exit(1);}//监听端口if(listen(serversockfd,4)<0){printf("%s",strerror(errno));exit(1);}printf("webserver is started ...\n");while(1){if((clientsockfd=accept(serversockfd,(struct sockaddr*)&addr,(socklen_t*)&addrlen))<0){printf("error1: %s\n",strerror(errno));exit(1);}if((number=read(clientsockfd,buffer,sizeof(buffer)))){buffer[number]='\0';}//解析报文，判断请求资源类型char *token=strtok(buffer," ");if(token!=NULL){token=strtok(NULL," ");}if(endWith(token,".jpg")){strcpy(type,"image/jpeg\r\nAccept-Ranges:bytes");}else if(endWith(token,".gif")){strcpy(type,"image/gif");}else if(endWith(token,".js")){strcpy(type,"text/javascript");}else if(endWith(token,".css")){strcpy(type,"text/css");}else{strcpy(type,"text/html");}//查找并提供请求资源strcpy(filePath,"/home/Lenovo/workspace/webserver/WebRoot");strcat(filePath,token);if((fd=open(filePath,O_RDONLY,0766))<0){strcpy(content,strerror(errno));printf("error2: %s\n",strerror(errno));}else{if((fileSize=read(fd,content,sizeof(content)))){content[fileSize]='\0';}else{strcpy(content,"Empty !");}close(fd);}//拼装报文memset(sendBuf,'\0',sizeof(sendBuf));strcat(sendBuf,"HTTP/1.1 200 OK\r\n");strcat(sendBuf,"Server:MENGXIANLU\r\n");strcat(sendBuf,"Content-Length:");sprintf(fileLenth,"%d",fileSize);strcat(sendBuf,fileLenth);strcat(sendBuf,"\r\n");strcat(sendBuf,"Content-Type: ");strcat(sendBuf,type);strcat(sendBuf,"\r\n");strcat(sendBuf,"\r\n");for(i=0,j=strlen(sendBuf); i<fileSize ; i++,j++){*(sendBuf+j)=*(content+i);}*(sendBuf+j)='\0';if((write(clientsockfd,sendBuf,j))<0){printf("error3: %s\n",strerror(errno));}close(clientsockfd);}close(serversockfd);return 0;}
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