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index.js
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'use strict';
const getUrl=require('./libs/getUrl'),
gbk=require('gbk'),
jsdom=require('jsdom').jsdom,
fs=require('fs'),
trimHtml=require('trim-html');
fs.readFile('./target/urls.txt','utf-8',function(err,data){//读取抓取目标地址文件
if(err){
console.log('写入有错',err);
}else{
var dataArr=data.split('\r\n');
for(let [index,elem] of dataArr.entries()){//循环抓取数据
init(elem,index);
}
}
});
function init(url,index){//抓取数据方法
getPageCount(url).then(
function(data){
var pageCount=data[0].pageCount;
getPages(url,pageCount).then(
function(data){
console.log(`一共${data.length}个数据`);
//抓取成功后,写入data目录里
fs.writeFile(`./data/email_${index}.txt`,data.join('\r\n'),{flag: 'a'},function(err){
if(err){
console.log('写入有错',err);
}else{
console.log('写好了');
}
});
},function(err){
console.log(err);
}
);
},function(err){
console.log(err);
}
);
};
/*getPageCount('http://tieba.baidu.com/p/4229061162').then(
function(data){
var pageCount=data[0].pageCount;
getPages('http://tieba.baidu.com/p/4229061162',pageCount).then(
function(data){
console.log(`一共${data.length}个数据`);
fs.writeFile('./data/email.txt',JSON.stringify(data),function(err){
if(err){
console.log('写入有错',err);
}else{
console.log('写好了');
}
});
},function(err){
console.log(err);
}
);
},function(err){
console.log(err);
}
);*/
/*getBaiduPages('python',2).then(
function(data){
console.log(data);
},function(err){
console.log(err);
}
);*/
function getPages(url, page_count){
return new Promise(function(resolve, reject){
var i=1;
var result=[];
_qu();
function _qu(){
getFromListHTML(url,i).then(function(data){
result=result.concat(data);
i++;
if(i<=page_count){
_qu();
}else{
resolve(result);
}
}, reject);
};
});
};
/*function getBaiduPages(keyword, page_count){
return new Promise(function(resolve, reject){
var i=1;
var result=[];
_qu();
function _qu(){
getFromListHTMLtoBaidu(keyword,i).then(function(data){
result=result.concat(data);
i++;
if(i<=page_count){
_qu();
}else{
resolve(result);
}
}, reject);
};
});
};*/
function getPageCount(url){
return new Promise(function(resolve, reject){
var i=1;
var result=[];
_qu();
function _qu(){
getFromListHTMLtoPageCount(url,i).then(function(data){
result=result.concat(data);
resolve(result);
}, reject);
};
});
};
/*function getFromListHTMLtoBaidu(keyword, page){
var url = `https://www.baidu.com/s?wd=site%3Atieba.baidu.com%20${encodeURIComponent(keyword)}%20%E9%82%AE%E7%AE%B1&pn=${(page-1)*10}&oq=site%3Atieba.baidu.com%20python%20%E9%82%AE%E7%AE%B1&tn=50000021_hao_pg&ie=utf-8&rsv_pq=a95de61b0000748b&rsv_t=8481gsQroDX7HYwBzimPBZNxh5NX1XOz8Je4ZBMgV5xBILITiie8R%2BEQArryvM6sYiGaw8Zt&srcqid=1227457316821399132`;
return new Promise(function(resolve, reject){
getUrl(url).then(function(data){
var str=data;
var document=jsdom(str);
var searchLink=document.querySelectorAll('#content_left div.result h3.t a');
var aData=[];
for(var item of searchLink){
try{
aData.push(item.href);
}catch(e){};
}
console.log(aData);
resolve(aData);
}, reject);
});
};*/
function getFromListHTMLtoPageCount(url, page){
var url=`${url}?pn=${page}`;
return new Promise(function(resolve, reject){
getUrl(url).then(function(data){
var str=data;
var document=jsdom(str);
var pageCount=document.querySelectorAll('#thread_theme_5 .l_reply_num .red')[1].innerHTML;
resolve({"pageCount":pageCount});
}, reject);
});
};
function getFromListHTML(url, page){
var url=`${url}?pn=${page}`;
return new Promise(function(resolve, reject){
getUrl(url).then(function(data){
/*function normalizeCount(str){
if(str.endsWith('万')){
return parseInt(parseFloat(str)*10000);
}else if(str.endsWith('亿')){
return parseInt(parseFloat(str)*100000000);
}else{
return parseInt(str);
}
}*/
var str=data;
var aData=[];
var bData=[];
var itemStr='';
var resultData;
var document=jsdom(str);
var dPostContent=document.querySelectorAll('.j_d_post_content');
var replyContent=document.querySelectorAll('.lzl_content_main');
//console.log([...replyContent]);
var regPattern=/[\w!#$%&'*+/=?^_`{|}~-]+(?:\.[\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\w](?:[\w-]*[\w])?\.)+[\w](?:[\w-]*[\w])?/;
for(var item of dPostContent){
try{
itemStr=trimHtml(item.innerHTML,{preserveTags:true}).html.replace(/<[^>]+>/g,"");
itemStr=itemStr.match(regPattern).length?itemStr.match(regPattern).join(''):'';
aData.push(itemStr);
}catch(e){};
}
for(var item of replyContent){
try{
itemStr=trimHtml(item.innerHTML,{preserveTags:true}).html.replace(/<[^>]+>/g,"");
itemStr=itemStr.match(regPattern).length?itemStr.match(regPattern).join(''):'';
bData.push(itemStr);
}catch(e){};
}
resultData=[... new Set([...aData,...bData])];//合并并去重
resolve(resultData);
}, reject);
});
};