2
フォーラムから投稿タイトル、ユーザー名、最終投稿時刻を取得するシンプルなWebスクレイパーを作成しています。フォーラムのタイトルweb scraper
問題は、スクレーパがテーブルの最後の最後のエントリだけをプルすることです。例えば
: テーブルはこのように構成されている場合:
<tbody>
<tr class="">
<td class="title">
<a href="/forums/marketplace/8827" title="View full post details">Title number 1</a>
</td>
<td class="author"><a href="/members/pursu" title="View member, pursu">pursu</a></td>
<td class="count">0</td>
<td class="last_post">9 minutes ago</td>
</tr>
<tr class="color2">
<td class="title">
<a href="/forums/marketplace/8826" title="View full post details">Title number 2</a>
</td>
<td class="author"><a href="/members/colinatx" title="View member, colinatx">colinatx</a></td>
<td class="count">0</td>
<td class="last_post">9 minutes ago</td>
</tr>
<tr class="">
<td class="title">
<a href="/forums/marketplace/8785" title="View full post details">Title number 3</a>
</td>
<td class="author"><a href="/members/Object117" title="View member, Object117">Object117</a></td>
<td class="count">11</td>
<td class="last_post">about 1 hour ago</td>
</tr>
</tbody>
.json出力ファイルに書き込まれる結果が代わりにこの
{
"title": "Title number 3",
"author": "Object117",
"lastpost": "about 1 hour ago"
}
ですそれは次のようになります:
{
"title": "Title number 1",
"author": "pursu",
"lastpost": "9 minutes ago"
}
{
"title": "Title number 2",
"author": "colinatx",
"lastpost": "9 minutes ago"
}
{
"title": "Title number 3",
"author": "Object117",
"lastpost": "about 1 hour ago"
}
私はJavaScript:
var express = require('express');
var fs = require('fs');
var request = require('request');
var cheerio = require('cheerio');
var app = express();
app.get('/scrape', function(req, res){
//This is the URL to pull data from
url = 'http://www.pedalroom.com/forums/marketplace';
// The first parameter is our URL
// The callback function takes 3 parameters, an error, response status code and the html
request(url, function(error, response, html){
if(!error){
//pulling HTML
var $ = cheerio.load(html);
//Variables that capture data
var title, author, lastpost;
var json = { title : "", author : "", lastpost : ""};
$('.title').filter(function(){
var data = $(this);
title = data.children().first().text();
json.title = title;
})
$('.author').filter(function(){
var data = $(this);
author = data.children().first().text();
json.author = author;
})
$('.last_post').filter(function(){
var data = $(this);
lastpost = data.text();
json.lastpost = lastpost;
})
}
fs.writeFile('output.json', JSON.stringify(json, null, 4), function(err){
console.log('File successfully written! - Check your project directory for the output.json file');
})
// Finally, we'll just send out a message to the browser reminding you that this app does not have a UI.
res.send('Check your console!')
});
})
app.listen('8081')
console.log('Magic happens on port 8081');
exports = module.exports = app;
は私が何とかループにコードまたは多分何か他のものを必要とすること、それか?