With Web Scraping (https://www.octoparse.jp/), you can get the information you need in seconds and get the great value behind it. But before we do that, there are 10 questions to check.
[robot.txt](https://ja.wikipedia.org/wiki/Robots_exclusion_standard If crawls are allowed according to the file rules, we recommend that you read the Target Website Terms of Service (ToS) in advance to assess the legal feasibility of your data project. Some sites have made a clear statement that scraping is prohibited without permission. In that case, you must get permission.
What is the purpose of collecting data? Lead generation? Price monitoring? Or is it a sales list? SEO analysis? Where can I find high quality information? How can I find the target data? Making information decisions when choosing a data source is very important because it can have a significant impact on results. You can get hints from introductory articles scraping various information from popular websites in the Help Center.
The acquisition destination website is APIを提供している場合、提供されているAPIプラットフォームを使用して直接データを取得できます。わざわざ時間をかけてスクレイピングする必要はありません。APIプラットフォームへの接続方法については、次の例を参考してください。
Scraping small amounts of data is quick and easy with free scraping tools or free Python scripts. However, if you want to scrape a large amount of data with different website structures from multiple pages, you need to automate your business. You can scrape by spending time learning programming or outsourcing. In fact, many dedicated data service providers offer data collection services. Octoparse is one of them. Even if you turn on your computer, you can extract a large amount of data in the cloud in just a meal.
Do not dive deep into the web page URLs before (or after entering / selecting parameters) and after setting the filter, as they may be different. Therefore, instead of the pattern entered from the URL of the homepage, the Web page of the direct acquisition destination (link after search / data acquisition after login）にアクセスします。
If the web crawler visits frequently within a very short period of time (which is likely not human), the website will track and ban the local IP. The solution can slow down the scraping process as much as possible without triggering bot detection. However, if you want to get the latest data or get it at high speed, use the IP rotation function.
In Octoparse, just like you would normally do when browsing a website, [CAPTCHA](https://helpcenter.octoparse.jp/hc/ja/articles/360015816473-Octoparse%E3%81%AFCAPTCHA-reCAPTHCA % E3% 82% 92% E5% 87% A6% E7% 90% 86% E3% 81% A7% E3% 81% 8D% E3% 81% BE% E3% 81% 99% E3% 81% 8B-? source = search & auth_token = eyJhbGciOiJIUzI1NiJ9.eyJhY2NvdW50X2lkIjo5MDc3MjYzLCJ1c2VyX2lkIjozOTUyNDkzNjQyNzQsInRpY2tldF9pZCI6OTQxLCJjaGFubmVsX2lkIjo2MywidHlwZSI6IlNFQVJDSCIsImV4cCI6MTU3ODAxNTI4NH0.WOZ-IR83jS4KbRxYvM21mEEFBYI338aV022wJyH5yhc) can be solved manually. However, it is better not to touch it from the beginning. Don't scrape your website too much, be human and scrape it.
You can export the data in the following formats: Excel, JASON, CSV, HTML, MySql, or API (API) https://helpcenter.octoparse.jp/hc/ja/articles/360017791934-API?source=search&auth_token=eyJhbGciOiJIUzI1NiJ9.eyJhY2NvdW50X2lkIjo5MDc3MjYzLCJ1c2VyX2lkIjozOTUyNDkzNjQyNzQsInRpY2tldF9pZCI6OTQxLCJjaGFubmVsX2lkIjo2MywidHlwZSI6IlNFQVJDSCIsImV4cCI6MTU3ODAxNTI4NH0.WOZ-IR83jS4KbRxYvM21mEEFBYI338aV022wJyH5yhc)を使用して独自のシステムにエクスポートします。
If you need to keep up to date with the latest data, crawlers written in programming languages are no longer useful due to changes in the structure of your website. Rewriting a script is not an easy task, it can be very tedious and time consuming. Unlike the tedious task of rewriting code, you can keep your crawlers up-to-date by simply clicking the web page again in Octoparse's built-in browser.
It's not the data collection that has the big impact on the business, but the analysis of the data. It is very important to be able to make decisions based on those data.
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