linuxc++模拟简易网络爬虫实例

/*
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*/

/* 
* File: main.cpp
* Author: yangchao
*
*/

#include 
#include 
#include 
#include 
#include 

using namespace std;

void parseHostAndPagePath(const string url,string &hostUrl,string &pagePath){
hostUrl=url;
pagePath="/";
int pos=hostUrl.find("http://");
if(-1!=pos)
hostUrl=hostUrl.replace(pos,7,"");
pos=hostUrl.find("https://");
if(-1!=pos)
hostUrl=hostUrl.replace(pos,8,"");
pos=hostUrl.find("/");
if(-1!=pos)
{
pagePath=hostUrl.substr(pos);
hostUrl=hostUrl.substr(0,pos);
}
}

string getPageContent(const string url){
struct hostent *host;
string hostUrl,pagePath;
parseHostAndPagePath(url,hostUrl,pagePath);
if(0==(host=gethostbyname(hostUrl.c_str())))
{
cout<<"gethostbyname error\n"<h_addr))->s_addr;
int isock;
if((isock=socket(AF_INET,SOCK_STREAM,0))==-1)
{
cout<<"open socket error\n"<0){
if('\r'==c){
continue;
}else if('\n'==c){
if(false==flag)
break;
flag=false;
}else{
flag=true;
}
}
int len,BUFFER_SIZE=512;
char buffer[BUFFER_SIZE];
string pageContent="";
while((len=recv(isock,buffer,BUFFER_SIZE-1,0))>0){
buffer[len]='\0';
pageContent+=buffer;
}
return pageContent;
}

int main(int argc, char** argv) {
cout<