C语言HTTP请求GET

因对《所谓黑客揭秘》，大家都攻击代码的要求。所以我开始了为期两周的C/C++学习。由于没有任何C/C++基础，而是临时突击，所以代码肯定漏洞甚多，请观者见谅。同时欢迎拍砖或者支出代码错误，以求大家共同进步。

#include <stdio.h>#include <string.h>#include <winsock.h>#include <stdlib.h>void DownLoad(char *url){WSADATA WsaData;SOCKET socketfd;SOCKADDR_IN addr;HOSTENT *pURL;int i=0;char myurl[BUFSIZ];char *pHost =0,* pGet =0;char host[BUFSIZ],GET[BUFSIZ];char Header[BUFSIZ];FILE * pf;static char text[BUFSIZ];if (WSAStartup(MAKEWORD(2,2),&WsaData)){printf("The socket failed");return;}strcpy(myurl,url);for (i=0,pHost= myurl;*pHost!='/'&&*pHost!='/0';pHost++,i++){host[i] = *pHost;}host[i]='/0';strcpy(GET,pHost);strnset(Header,'/0',BUFSIZ);socketfd = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);pURL = gethostbyname(host);addr.sin_addr.s_addr = *((unsigned long *)pURL->h_addr);addr.sin_family = AF_INET;addr.sin_port = htons(80);strcat(Header,"GET / ");strcat(Header,GET);strcat(Header,"HTTP/1.1/r/n");strcat(Header,"Accept: */*/r/n");strcat(Header,"Accept-Language: zh-cn/r/n");strcat(Header,"User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; InfoPath.2)/r/n");//strcat(Header,"Accept-Encoding: gzip, deflate/r/n");strcat(Header,"Host: ");strcat(Header,host);strcat(Header,"/r/nConnection: Keep-Alive/r/n");strcat(Header,"/r/n/r/n");connect(socketfd,(SOCKADDR *)&addr,sizeof(addr));send(socketfd,Header,strlen(Header),0);printf("%s",Header);pf = fopen("1.txt","w");while(recv(socketfd,text,BUFSIZ,0)>0){printf("%s",text);fputs(text,pf);strnset(text,'/0',BUFSIZ);}fclose(pf);closesocket(socketfd);WSACleanup();}int main(){char a[256];printf("http://");scanf("%s",a);DownLoad(a);}