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;
}
