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selection mode

Posted: Sun Oct 02, 2011 4:34 pm
by relicon
There are times when Helium Scraper scrapes data it somehow skips some of the data, even though it can be selected and recognized by the Kind.

Like for example, I was scraping the Prices and item numbers in ebay. Some prices were skipped and some item numbers were skipped also, however, they can be selected and recognized by the Kind that I added.

Re: selection mode

Posted: Mon Oct 03, 2011 4:59 pm
by webmaster

If your kind is properly selecting them, this is most likely because the item loads dynamically (with AJAX) and has not fully loaded when you attempt to extract it. One solution would be to use the Force Select premade. If you wish, send me your project and I'll see what the problem is.

Re: selection mode

Posted: Mon Oct 03, 2011 8:55 pm
by relicon
Hi Webmaster,

You are definitely right about the Ajax code that Ebay uses. I have attached the project below. By the way, how do you add the premade "Force Select"?

Thanks a lot.

Re: selection mode

Posted: Mon Oct 03, 2011 10:14 pm
by webmaster

Here is a version of your project that uses the Force Select action. This action can be used as you would use any other action from New action -> Execute actions tree -> More.... All you need to do is set it before your Extract action so that execution holds while the item number has not loaded. You can double click it to see how is configured.

Re: selection mode

Posted: Mon Oct 03, 2011 10:53 pm
by relicon
Thanks a whole lot Webmaster, this is the one I've been looking for!

I also figured out that I can also add the "Wait" action.

There is only one thing though...

When I played the Ebay2.hsp, I checked the memory usage and it was increasing a lot.

Is there anyway, to lower the memory usage?

It seems to keep adding up. And then it would load very slowly.

The memory usage is constantly increasing and it never stops increasing.

You can know the memory usage by playing the Ebay2.hsp and then press Ctrl+alt+Delete in order to open the Task Manager window and then click "Processes" tab. You will find that helium scraper is constantly increasing its memory usage.

Re: selection mode

Posted: Mon Oct 03, 2011 11:03 pm
by relicon
Oh wait!

I think I know how to solve this very easily.

I think I need to add a "Wait" action and then disable all of my javascript....

I'll let u know the results soon.

I believe this will prevent the memory usage from increasing.

Re: selection mode

Posted: Tue Oct 04, 2011 12:13 am
by webmaster

Regarding the Wait action, it will work, but I'd recommend using the Force Select instead because on one hand you might need to wait less than you would on your Wait action, which would make your extraction process slower, or you might need to wait longer, which would cause the item number not to be extracted. The Force Select action will wait just as long as necessary.

Regarding the memory issue, how high did your memory get? The slower speed could be due to slower server response. However, we have experienced memory issues with Manta, which could be related to the one you are having. One possible solution is to install Internet Explorer 9 and perform the following change in Window's registry, which will force Helium Scraper to use the IE 9 component (instead of the IE 7 which is the default one):

  1. Click Start -> Run.
  2. Type regedit and press OK.
  3. Navigate to the "HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION" folder from the left panel.
  4. Make sure the "FEATURE_BROWSER_EMULATION" folder is selected, and from the main menu, go to Edit -> New -> DWORD (32-bit) Value.
  5. Rename the new value added to Helium Scraper.exe.
  6. Double click Helium Scraper.exe.
  7. Select the Decimal base.
  8. Set the Value data to 9000 and press OK.
Only perform this changes after you have installed IE9.

Let me know how this goes.

Re: selection mode

Posted: Tue Oct 04, 2011 12:14 am
by webmaster
The problem with disabling JavaScript is that it might affect Helium Scraper functionality. For instance, the Force Select action won't work because it uses JavaScript (I assume you mean disabling it from your Internet Options).

Re: selection mode

Posted: Tue Oct 04, 2011 12:19 am
by relicon
I will install IE9 and follow the instructions that you have provided.

And yes, you are right. When I disabled the Javascript, the Force Select didn't work and even though I added a "waiting time," it didn't scrape some of the item numbers.

Re: selection mode

Posted: Tue Oct 04, 2011 12:21 am
by relicon
There is one more thing though....

What option do I add if there is no item number?

I found out that if it lacks the item number, it will say "Timeout reached when trying to select 'item number.' Execution will pause."

How do you make it continue without manually clicking play?

I was wondering that if it cannot Force Select the item number (because it's lacking in the page), it should skip it.

Is there any way to configure that?