代码没有优化,仅仅作为大概的流程记录:
var http = require('http')
, fs = require('fs');
var urlTpl = 'http://somedomain/loadmore.ashx?page={PAGE}&price=0&brandid=0&country=0&deliveryCapacity=0&level=0&struct=0&seat=0';
var counter = 0;
var page = 1,
saveImage = function(res,name){
var imagedata = '';
res.setEncoding('binary');
res.on('data', function(chunk){
imagedata += chunk
});
res.on('end', function(){
fs.writeFile("D:/ziliao/Node/pic/" + name + ".jpg", imagedata, 'binary', function(err){
if (err) throw err
console.log('File saved.')
})
});
};
var reg = /src="(.*?)".*?title="(.*?)"/gi;
var reconvert = function(str){
return str.replace(/(\\u)(\w{4}|\w{2})/gi, function($0,$1,$2){
return String.fromCharCode(parseInt($2,16));
});
}
while(page < 26){
url = urlTpl.replace(/\{PAGE\}/,page);
var req = http.get(url,function(res){
res.setEncoding('utf-8');
var rs = null ,str = '';
res.on('data', function (chunk) {
str += chunk;
});
res.on('end',function(){
while(true){
//测试用,我们只要50张图片
if(counter++ > 50) {break;}
rs = reg.exec(str);
if(rs === null){ break;}
(
function(url,name){
http.get(url,function(res){
//name = reconvert(name);
saveImage(res,reconvert(name));
});
}
)(rs[1],rs[2]);
}
})
});
page++;
}