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756.Text file parser -- How to extract all specific links from webpage?

User: bruce lee -- 2011-04-01          << 755  757 >>
Hits: 3314
Type: Text file parser   
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Description:
how to extract all specific links from webpage? 
Input Sample:
eg,there are many links in a webpage  
http://www.51.la/?3550778 
http://member/reg.asp 
http://buyers-list.asp?=4 
http://buyers-list.asp?=5 
http://buyers-list.asp?=6
Output Sample:
http://buyers-list.asp?=4 
http://buyers-list.asp?=5 
http://buyers-list.asp?=6
Answer:
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
You need to use Regular Expression to describe what kind of links you need to extract, for this example, the Regexp is: 
 
 
Steps: 
1. ctrl-o open downloaded webpage file. 
Note: if you want to open webpage directly, select "File->Load->WWW Page" menu, input URL and set "Type" to "Html", click "ok". 
2. ctrl-h open 'replace' window 
* set 'search for pattern' to: 
 
* set 'replace with pattern' to: 
 
* uncheck 'print unmatched unit' option 
3. click 'replace', all required link will be extracted. 

Screenshot 1:  Replace_Window


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