Question

Look up PageRank and Backlinks Programmatically?

Asked by: jonleehacker

Basically I want to know how this site:

http://www.seochat.com/?tool=7&option=com_seotools&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=diesel+trucks&result_mode=relevance&num=10&btnG=+++Search+++

did what they do? [no I don't want to compete with them, I need similar info for a win32 [.net] application that I am building.]

So the points are for explaining to me how they have done it. I realize that the Google API can do some of the work, but it is limited to 1000 searches a day and it is a separate search for each link look up.

Therefore a just a single lookup with backlinks counts for each result would burn up 11 searches. A site such as the one above would use the 1000 very quickly.

so to be more specific:

- how did they lookup the page rank for each site?
- how do they lookup the backlinks [separated by insite and offsite] for each site?
- how do they lookup [parse] the meta data and display it?
- how do they get around the 1000 daily uses of the Google API.
- any other relevant info that is necessary

partial points will be awarded.

Thanks a lot,

Jon

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Asked On
2005-06-15 at 18:55:37ID21459843
Tags

pagerank

,

programmatically

,

page

,

rank

Topic

Web Languages/Standards

Participating Experts
1
Points
500
Comments
7

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Answers

 

by: T22Posted on 2005-06-16 at 04:05:40ID: 14229671

Hi there,

As for the PageRank part.

You can use the following url to retrieve the PageRank info for experts-exchange.com:
http://www.google.com/search?client=navclient-auto&ch=62360705356&features=Rank&q=info:www.experts-exchange.com

For every PageRank you want, you will have to calculate a checksum (the 'ch' part in the url above). How to do this is already figured out by someone, please look at this piece of php: http://www.mobileread.com/forums/showpost.php?p=7769&postcount=87

You can also let the checksum be returned with http://www.flexficie.nl/pr.php?url=www.experts-exchange.com

The first mentioned url will return this html:
Rank_1:1:7

So what you have got to do is:
- generate checksum (maybe you or someone else can convert the php code to ...)
- retrieve html
- parse the PageRank-number out of it

I don't know if you want a PageRank-number or a PageRank-graphic, but the last one is available on quite a few websites.

Greetings

 

by: T22Posted on 2005-06-16 at 07:18:00ID: 14231363

I did some further searching...

Stephane Queraud has created a PageRank bar for Mozilla and Firefox: http://pagerankstatus.mozdev.org/index.html
It is actually a javascript, the checksum-coding is based on the php code mentioned in my previous post. Source code is available so if you understand javascript better than php you should check it out.

I don't  know anything about .NET programming, but parsing the meta tags from the html should not be hard (it isn't hard in VBScript, so...).

And I'm sorry, but I cant help you with the Google API (never heard of it). And I'm pretty sure Seochat.com isn't using it.  I think that seochat.com uses php for their functions; it could be possible that they are using just using the same php code as I mentioned for the PageRank.

Regards, T22

 

by: jonleehackerPosted on 2005-06-16 at 09:44:42ID: 14233137

Thanks T22,

I'll have a look tonight...you've given me enough to get started for sure.

here's the google api, if you're curious...it's pretty cool, but quite limited: http://www.google.com/apis/

Jon

 

by: T22Posted on 2005-06-16 at 10:55:08ID: 14233796

Yet another post, some Google backlinks info

The google syntax for looking up links to a page is (actually there are more syntaxes, but ...)
http://www.google.com/search?q=link:www.experts-exchange.com

In the page it returns, the insite backlinks are in the first blockquote element, the offsite backlinks come next.

For above url the html page structure is like this (simplified)
- insite backlink 1 (the best result)
- <blockquote>
   - insite backlinks continued
- </blockquote>
- offsite backlinks

Every backlink (not all, but I don't know why that is) has this structure (also simplified):

<a href="[url backlink]">[title]</a><br>[description]<br>[url backlink] - [size page] - <a href="[cached page url]">Cached</a> - <a href="[similar pages url]">Similar pages</a>

I hope I have saved you some research, you can parse the backlinks knowing Googles search page structure

You have enough to try out I guess
So, greetings
T22

 

by: jonleehackerPosted on 2005-06-20 at 19:08:41ID: 14262421

Thanks T22,

I've been able to implement everything from my original list thanks to your info!!!

Much appreciated.

I wasn't able to translate the checksum algo from php to vb.net so I'm using the page you provided...I don't like to be dependent on that but until I find someone who knows php & vb it will have to do....

The only thing I forgot to put on my list was this:

I want to be able to find out a given page's ranking in Google for a certain keyword.

For example:

page = http://mydomain.com/pageA.html
keyword = my keyword phrase

and get back the position in Google's result's for this page

position = 233

I want to be able to create a program to do it so I can track my pages' progress as I work on the SEO.

There are sites that offer this service [ex. http://www.websitehostdirectory.com/googlepageranktool.html ] and I can't figure out how they do it.

So I'll throw in an extra 100 points [I'm assuming I can do that :0] if you or anyone else can provide a way to get this info programmatically.

Thanks,

Jon

 

by: T22Posted on 2005-06-21 at 09:19:35ID: 14267553

Hi there again,

I'm glad to help!

it seems to me that the service is looking for the url in the first 100 results of a given search because if you search for "www.experts-exchange.com" with the keyword "dude", the service will return "www.experts-exchange.com not found in first 100 results.".

So to get 100 results on 1 page, add the query "num" to the Google url, example:

http://www.google.com/search?q=dude&num=100
this will return a page with 100 results.

You then search for the first occurrence of your url in the requested page.

Greetings

 

by: jonleehackerPosted on 2005-06-22 at 19:13:20ID: 14281015

Thanks a lot...you saved my a bunch of time.

I forgot to add the bonus points before I closed the question, so I created this question to give them to you...

Just add a comment here: http://www.experts-exchange.com/Web/Web_Languages/Q_21467805.html

and I'll pass over another 100 points.

thanks again,

Jon

20120131-EE-VQP-002

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