Server

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <errno.h>
#include <netdb.h>
#include <unistd.h>
#include <ctype.h>


#define  MYPORT    12345
#define  BACKLOG   5

int KEY_QUIT = 0;
static char copybuf[16384]={0};
#define DEBUG 1



int copy(FILE *read_f, FILE * write_f) //複製html文件
{
    int n;
    int wrote;
    n = fread(copybuf,1,sizeof(copybuf),read_f);
    wrote = fwrite(copybuf,n,1,write_f);
    return 0;
}

int DoHTML(FILE *f, char * name)
{
    FILE *infile;
    infile = fopen(name,"r"); //打開Client端請求的html文件

    printf("Sending mesg...\n");
    copy(infile,f); //複製Client客戶端請求的html文件
    printf("Complete sending.\n");
    fgets(copybuf,1000,infile);
    printf("\n");
    puts(copybuf);
    printf("\n");
    fread(copybuf,1,sizeof(copybuf),f);
    printf("DoHTML->fread done");
    fclose(infile);
    return 0;
}

int ParseReq(FILE *f, char *r) //分析當中的內容,提取client請求的文件名
{
    char *bp;
    char *c;
    #ifdef DEBUG
    #endif
    while(*(++r) != ' '); //去掉請求內容開頭的空格部分
    while(isspace(*r)) r++; //判斷輸入字符是否為空格/換行等，去掉所有這些字符
    while(*r == '/') r++; //去掉所有的'/'字符
    bp = r; //得到文件名的起始
    while(*r && (*r != ' ') && (*r != '?')) r++;
    *r = 0;
    c = bp;
    printf("The Request FileName is %s\n", c);
    DoHTML(f, c); //得到文件名之後處理請求
    return 0;
}

int HandleConnect(int fd)
{
    FILE *f;
    char buf[160];
    f = fdopen(fd, "a+"); //打開對應文件名的html文件
    setbuf(f, 0); //清除f文件緩存
    fgets(buf, 150, f); //從Client請求中獲取前面150個字符
    #ifdef DEBUG
    #endif
    ParseReq(f, buf); //分析請求的內容
    printf("ParseReq done");
    fflush(f);
    printf("free success");
    fclose(f);
    return 1;
}

void * key(void *data)
{
    int c;
    for(;;)
    {
    c = getchar();
        if(c == 'q'||c == 'Q')
        {
        KEY_QUIT = 1;
        exit(10);
        break;
        }
    }
}



int main(void)
{
   int  sockfd, new_fd; // listen on sock_fd, new connection on new_fd
   struct sockaddr_in   my_addr; // my address information
   struct sockaddr_in   their_addr; // connector’s address information
   int sin_size;

   if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
      perror("socket");
      exit(1);
   }

   my_addr.sin_family = AF_INET; // host byte order
   my_addr.sin_port = htons(MYPORT); // short, network byte order
   my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
   memset(&(my_addr.sin_zero), 0, 8); // zero the rest of the struct

  if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1) {
      perror("bind");
      exit(1);
  }
  if (listen(sockfd, BACKLOG) == -1) {
      perror("listen");
      exit(1);
  }

  while(1) {                     // main accept() loop

      printf("Wait for connection....\n");

      sin_size = sizeof(struct sockaddr_in);
      if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
          perror("accept");
          continue;
      }

      printf("Handle Connection...\n");
      HandleConnect(new_fd);


      close(new_fd);

   } // end of while
   return 0;
}