[development] Xpath query for class matching

[Domenic Santangelo]

nitin gupta wrote:
> @URL: Maybe in hurry, I did not explain it properly. This was exactly 
> what I was doing. look at the project, 
> https://sourceforge.net/projects/absoluteurl/
>
> until I came across this image url on the google images page:
>
> http://t3.gstatic.com/images?q=tbn:7i1D2KAZcCd8yM:http://www.flash-slideshow-maker.com/images/help_clip_image004.jpg
>
> What would you consider here the query string or the path? Anything we 
> do, the URL is going to break unless we do nothing. Any ideas?(may be 
> just for encode the spaces).
>
scheme: http
host: t3.gstatic.com 
<http://t3.gstatic.com/images?q=tbn:7i1D2KAZcCd8yM:http://www.flash-slideshow-maker.com/images/help_clip_image004.jpg>
path: images 
<http://t3.gstatic.com/images?q=tbn:7i1D2KAZcCd8yM:http://www.flash-slideshow-maker.com/images/help_clip_image004.jpg>
query: 
q=tbn:7i1D2KAZcCd8yM:http://www.flash-slideshow-maker.com/images/help_clip_image004.jpg 
<http://t3.gstatic.com/images?q=tbn:7i1D2KAZcCd8yM:http://www.flash-slideshow-maker.com/images/help_clip_image004.jpg>

That url is some sort of thumbnail maker or something... compare to 
http://www.flash-slideshow-maker.com/images/help_clip_image004.jpg

-D


> --
> Regards,
> Nitin Kumar Gupta
> http://publicmind.in/blog/
>
>
> On Sat, Oct 3, 2009 at 2:22 AM, Domenic Santangelo 
> <domenic at workhabit.com <mailto:domenic at workhabit.com>> wrote:
>
>     nitin gupta wrote:
>>     Thanks for your help. but this query will probably select
>>     "abcfooxyz" as well when "foo" is supplied. (untested), although
>>     it will definitely select "foo" in "foo bar" (tested)
>>
>>     $xpath->query("//div[contains(@class, '" . $class . "')]")
>>
>>     How can we be more specific?
>     Try this example:
>     http://westhoffswelt.de/blog/0036_xpath_to_select_html_by_class.html
>
>
>>     @URL: Actually I am maintaining the module feedapi imagegrabber,
>>     which downloads images from external websites. Now sometimes the
>>     url I parse has spaces, so I am unable to decide whether or not
>>      to percentage encode the URL, because percentage encoding will
>>     make this URL valid but will break the following URL:
>>     http://www.google.com/search?q=hello
>>     by converting it to
>>     http://www.google.com/search?q%3Dhello
>     "q=hello" is a query string, not strictly part of the path. I
>     would strip the url to its component parts (parse_url) and encode
>     the path, then re-append the query string.
>
>     http://us2.php.net/manual/en/function.parse-url.php
>     http://www.faqs.org/rfcs/rfc1738.html
>
>     HTH,
>
>     -D
>
>
>
>>     Looking forward.
>>
>>     --
>>     Regards,
>>     Nitin Kumar Gupta
>>     http://publicmind.in/blog/
>>
>>
>>     On Sat, Oct 3, 2009 at 1:30 AM, Domenic Santangelo
>>     <domenic at workhabit.com <mailto:domenic at workhabit.com>> wrote:
>>     >
>>     > nitin gupta wrote:
>>     >
>>     > for eg <div class="foo"></div> is selected by the following query.
>>     > $class = "foo";
>>     > $xpath->query("//*[@class = '".$class."']");
>>     > But, this fails in case of multiple classes, i.e. does not
>>     select this :
>>     > <div class="foo bar"> </div>
>>     >
>>     > The "contains" function would probably work, eg (untested):
>>     > $xpath->query("//div[contains(@class, '" . $class . "')]");
>>     >
>>     > One more question: is this url valid : http://xyz.com/path with
>>     space.html
>>     >
>>     > Nope. You can escape the url if you just HAVE to have spaces:
>>     >
>>     > http://n00b.com/path%20with%20space.html
>>     >
>>     > but why not use dashes?
>>     >
>>     > http://pro.com/path-with-properly-indexed-spaces.html
>>     >
>>     > -Dom
>
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