简单的linux -c http-client

#include<stdio.h>
#include <unistd.h>
#include<fcntl.h>
#include<netdb.h>
#include<stdlib.h>
#include "httpclient.h"
#include<string.h>
#include<sys/types.h>
#include<sys/socket.h>
#include <netinet/in.h>

const char * http_s = "http://";

typedef struct{

char *url;
int port;
char *host;
char *anyurl;
int isip;

}Hostinfo;

int isip(const char * s){

         while( *s ){
                 if(isalpha(*s) && *s != '.')
                  {
                         return 0;
                  }     
                  s++;  
         }       
        
         return 1;
        
}

int gethostinfobyurl(const char * url, char ** host, int *port, char ** anyurl)
{

if(url == NULL || 0!=strncmp(url, http_s, strlen(http_s)) ){

printf("url is not legal, %s\n", url);

return -1;
}


char * h_url = strstr(url,"//");

h_url = h_url + 2;

*anyurl= strchr(h_url,'/');

printf("hurl: %s\n",h_url);
if(anyurl != NULL){

char cc[1024];
char *pcc = cc;
strcpy(cc,h_url);
h_url = strsep(&pcc,"/");
printf("hhurl:%s\n",h_url);
}

if(NULL !=strchr(h_url,':')){

*host = strsep(&h_url,":");
char *cport = strsep(&h_url,":");
*port = atoi(cport);
}
else{

*host = h_url;
}
return 0;
}

void datas(int fp,Hostinfo *hinfo){

char request[1024];
bzero(&request,1024);
//sprintf(request,"GET %s  HTTP/1.1\r\nHost:  61.135.169.125:80\r\nConnection:   Close\r\n\r\n","/");
sprintf(request,   "GET   %s   HTTP/1.1\r\nAccept:   */*\r\nAccept-Language:   zh-cn\r\n\
Host:  %s:%d\r\nConnection:   Close\r\n\r\n ", hinfo->anyurl,hinfo->host,hinfo->port);

printf("\n\n");
printf("%s",request);

printf("\n\n");

printf("request is %s\n", request);
int send = write(fp, request,strlen(request));

if(send == -1){

printf("send error\n");
exit(1);
}


printf("send num: %d\n", send);
int BUFFER_SIZE = 2048;
char buffer[BUFFER_SIZE];
int length;
bzero(&buffer, BUFFER_SIZE);

        length = read(fp,buffer,BUFFER_SIZE);
char * content = buffer;


if(length <=0){

printf("error! read http return content!");

//return NULL;
}
char * head = strsep(&content,"\r\n");
printf("head:%s\n",head);

strsep(&head," ");

printf("1-->>head:%s\n",head);
if(head == NULL){


printf("error! read http return content!");
return;
}


head = strsep(&head," ");

printf("2-->>head:%s\n",head);
int result = atoi(head);

if(result == 200){
printf("success\n");

}

/*while( length = read(fp,buffer,BUFFER_SIZE)){
if(length <=0){
return ;
}
bzero(&buffer,1024);
}

*/



}
int connect_http(Hostinfo * hinfo)
{
int cfd;
struct sockaddr_in s_add;
        struct sockaddr_in * sinp;
struct addrinfo hint;
struct addrinfo *ailist, *aip;
int i = 0, err;
char seraddr[128];

printf(" hinfo->host: %s\n", hinfo->host);
  if(!(hinfo -> isip)){

  hint.ai_family = AF_INET;
  hint.ai_socktype = SOCK_STREAM;
  hint.ai_flags = AI_CANONNAME;
  hint.ai_protocol = 0;
  hint.ai_addrlen = 0;
  hint.ai_addr = NULL;
  hint.ai_canonname = NULL;
  hint.ai_next = NULL;
char name[1024];
strcpy(name, hinfo->host);
      if ((err = getaddrinfo(name, NULL, &hint, &ailist)) != 0) {
          printf("getaddrinfo error: %s host :%s\n", gai_strerror(err), hinfo->host);
          exit(-1);
       }

for (aip = ailist; i==0 && aip != NULL; aip = aip->ai_next) {
 
sinp = (struct sockaddr_in *)aip->ai_addr;
//break;
         i = i+1;

if (inet_ntop(sinp->sin_family, &sinp->sin_addr, seraddr, INET_ADDRSTRLEN) != NULL)
               {
                    printf("\nserver address is %s\n", seraddr);
               }



  }
}
else{

strcpy(seraddr,hinfo->host);
}
cfd = socket(AF_INET,SOCK_STREAM,0);
if(cfd == -1){
printf("socket error\n");
return -1;
}

struct timeval timeo = {3, 0};
socklen_t len = sizeof(timeo);
setsockopt(cfd, SOL_SOCKET, SO_SNDTIMEO, &timeo, len);
bzero(&s_add, sizeof(struct sockaddr_in));
s_add.sin_family=AF_INET; 
s_add.sin_addr.s_addr= inet_addr(seraddr);  
s_add.sin_port=htons(hinfo->port);

if(-1 == connect(cfd,(struct sockaddr *)(&s_add), sizeof(struct sockaddr))) 
{ 
    printf("connect fail !\r\n"); 
    return -1; 
} 
  // int flags = fcntl(cfd, F_GETFL, 0);                       //设置异步
       //fcntl(cfd, F_SETFL, flags | O_NONBLOCK); 
printf("connect ok !\r\n");
datas(cfd,hinfo);
close(cfd);
return 1;

}

char *  get(const char * url)
{
char * host = (char *)malloc(200);
char * curl = (char *)malloc(200);
int port = 80;
int *cport = &port;
int result = gethostinfobyurl(url,&host,cport,&curl);

if(result < 0){
return NULL;
}

printf("parase host:%s\n",host);
Hostinfo *hinfo = (Hostinfo*)calloc(1,sizeof(Hostinfo));

hinfo->port = port;
hinfo->host = host;
hinfo->anyurl = curl;
hinfo->isip = isip(hinfo->host);
connect_http(hinfo);
return NULL;
}


int main()
{
const char * url = "http://61.135.169.105:80/";
/* char * host = (char *)malloc(200);
char * curl = (char *)malloc(200);
int port = 80;
int *cport = &port;
gethostinfobyurl(url,&host,cport,&curl);
printf("host:%s \t address: %s\n",host,curl);
printf("port : %d\n",port);
*/
get(url);
return 0;

}