Web Scraping Advanced

Advanced Web Scraping with Scrapy. Web Scraping and Web Crawling go hand in hand when you want to scrape X number of pages. For example, if you want to scrape search. We are looking for a solution to do web scraping and extract the specified Google location data that is usually displayed on the Google search results. It should also extract the name of the location. We predefined the searches, example named BANK branches. G The KCB BRANCH ITEN KENYA Use. We are looking for a solution to do web scraping and extract the specified Google location data that is usually displayed on the Google search results. It should also extract the name of the location. We predefined the searches, example named BANK branches. G The KCB BRANCH ITEN KENYA Use.

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Extract Web Data in 3 Steps

Point, click and extract. No coding needed at all!

  • Enter the website URL you'd like to extract data from

  • Click on the target data to extract

  • Run the extraction and get data

  • Step 1Step 2Step 3

Extract Web Data in 3 Steps

Point, click and extract. No coding needed at all!

  • Step 1

    Enter the website URL you'd like to extract data from

    Step 3

    Run the extraction and get data

Advanced Web Scraping Features

Everything you need to automate your web scraping

Easy to Use

Scrape all data with simple point and click.
No coding needed.

Deal With All Websites

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Download Results

Download scraped data as CSV, Excel, API
or save to databases.

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IP Rotation

Automatic IP rotation to prevent IP
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What We Can Do

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  • It is very easy to use even though you don't have any experience on website scraping before.
    It can do a lot for you. Octoparse has enabled me to ingest a large number of data point and focus my time on statistical analysis versus data extraction.
  • Octoparse is an extremely powerful data extraction tool that has optimized and pushed our data scraping efforts to the next level.
    I would recommend this service to anyone. The price for the value provides a large return on the investment.
    For the free version, which works great, you can run at least 10 scraping tasks at a time.

In the beginning there were GET forms

When you’re searching for water atWalmart, the URL lookslike this:

It’s easy to scrape! If you wanted to search for guns instead, you’d justchange water to guns in the URL and off you go. This nice way of living isparameters in the query string.

But it isn’t always like that.

Advanced Web Scraping Using Python

But then: POST Forms

But for most forms, though, it isn’t that easy. You type in your info, you click“Search”, and there’s nothing in the URL. For example, try searching atCalifornia’s Engineer License Database.

The URL you end up at is something likehttp://www2.dca.ca.gov/pls/wllpub/WLLQRYNA$LCEV2.ActionQuery, which doesn’tmean anything. No parameters in that query string!

If you search through the browser you see a lot of table rows, but if you try itin Python it doesn’t give you anything.

Advanced Python Web Scraping

Nothing at all! What did it give us? Let’s look at response.text.

If you read closely, that’s an error. It’s because we didn’t send it anysearch data.

Looking at response.text is THE BEST WAY to find out whether your searchworked. You can ctrl+f or just visually search for words you know should be onthe page.

Finding our form data

When we clicked “Search,” it also sent the server a bunch of data - all of theoptions we typed in, or the dropdowns we selected. Here are the steps to findout what data needs to be sent along with your request.

We’re going to use Chrome’s Network tools to analyze all of the requests ourbrowser sends to the server, then imitate them in Python.

  1. Open up Developer Tools in Chrome by selecting View > Developer >Developer Tools.
  2. Select the Network Tab
  3. Visit the page you’re going to do your search from
  4. Click the Clear button up top - 🚫 - then submit your form
  5. The Network tab will fill with activity!
  6. Find the thing in the Network tab that looks like the same name as yourwebpage. Click it.
  7. On the right-hand side you get a new pane. If you scroll allllll the way downit lists Form Data.

This Form Data is what we need to send along with our request. We just needto convert it to a dictionary and send it along.

Advanced Web Scraping In Php

Sending data with the form request

Once we’ve converted our form data into a dictionary, we need to make sure oftwo things:

  1. We’re using requests.post to make our request
  2. We’re sending the form data with the request
Advanced

Normal browser requests are sent as GET requests, but these very fancy onesare sent as POST. POST just means “hey I’m sending extra data along withthis.”

If we didn’t know if it worked or not, we could also check the response bylooking at response.text.

Sending headers with your request

Sometimes that isn’t enough! Some web servers check to make sure you’re a realbrowser, or you came from their site, or other stuff like that.

We don’t need to do this for the Engineers page, but I’m going to do itanyway.

When you send a request, you also send thing called “Headers.” You can see theheaders inside of the same Network tab part where you found Form Data. It’slisted as Request Headers - ignore the response headers.

Pretending to be the browser

The most common thing you’ll need to do is impersonate a browser by sending aUser-Agent string. If we wanted to visit Columbia’s website pretending to beChrome, we might do this:

Finding the appropriate headers

Sometimes pretending to be the browser just isn’t enough. If you want to 100%imitate your browser when sending a request, you need to copy aaaaalllll of theheaders from the request.

It’s just above the Form Data information, but I’ll tell you how to find itagain just to be sure:

  1. Open up Developer Tools in Chrome by selecting View > Developer >Developer Tools.
  2. Select the Network Tab
  3. Visit the page you’re going to do your search from
  4. Click the Clear button up top - 🚫 - then submit your form
  5. The Network tab will fill with activity!
  6. Find the thing in the Network tab that looks like the same name as yourwebpage. Click it.
  7. On the right-hand side you get a new pane. If you scroll near to the bottomit shows you Request Headers.

You just need to convert these into a dictionary, and send them along with yourrequest.

Sending the appropriate headers

I just checked my results for the Engineers bit. It has a lot of headers!

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8Accept-Encoding:gzip, deflateAccept-Language:en-US,en;q=0.8Cache-Control:max-age=0Connection:keep-aliveContent-Length:156Content-Type:application/x-www-form-urlencodedHost:www2.dca.ca.govOrigin:http://www2.dca.ca.govReferer:http://www2.dca.ca.gov/pls/wllpub/wllqryna$lcev2.startup?p_qte_code=ENG&p_qte_pgm_code=7500Upgrade-Insecure-Requests:1User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36(KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

I’m usually too lazy to copy all of them so I only take the ones I think I need,but if you’d like to it’s probably easier than the weird curl thing I talkedabout in class.

Let’s make a request using both headers and POST data.

Perfect! By learning how .post requests, form data and headers work, you’renow going to be able to scrape a lot of very difficult sites.