从curl的输出中提取模式 [英] Extract a pattern from the output of curl

问题描述

我想在命令行上使用curl来抓取网址，将其转换为模式，并返回与该模式匹配的网址列表。

我遇到了模式的贪婪方面的问题，似乎不能通过它。

  curl http://www.reddit.com/r/pics/ | grep -ioEhttp：//imgur\.com/.+（jpg | jpeg | gif | png）
  

所以，从url中获取数据，这会返回一堆html，这可能需要一些linebreaks以某种方式替换，无论正则表达式可以返回多个模式在一行。该模式很简单，任何匹配的字符串...

• 以 http://imgur.com/


• 有AZ AZ 0-9（也许是其他人），目前为止，5个字符长，8应该永远覆盖它，如果我想限制模式的方面，我不


• 结束于.grraphic_file_format_extention（jpg，jpeg，gif，png）

关于它，在那个url，使用默认设置，我通常应该得到一套好的图像。

感谢所有人！

我们不会反对在同一页面使用RSS感觉网址

编辑
感谢您的快速回答，我的最终命令是：

  $ curl -s http://www.reddit.com/r/pics/ | grep -ioEhttp：\ / \ / imgur \.com \ /。{1,10} \。（jpg | jpeg | gif | png）
  
 
 
解决方案
尝试：
  http：\ / \ / imgur \.com \ /。{5,8} \。（jpg | jpeg | gif | png）
  
 
I would like to use curl, on the command line, to grab a url, pipe it to a pattern, and return a list of urls that match that pattern.

I am running into problems with greedy aspects of the pattern, and can not seem to get past it.  Any help on this would be apprecaited.
curl http://www.reddit.com/r/pics/ | grep -ioE "http://imgur\.com/.+(jpg|jpeg|gif|png)"
So, grab the data from the url, which returns a mess of html, which may need some linebreaks somehow replaced in, onless the regex can return more than one pattern in a single line.  The patter is pretty simple, any string that matches...


starts with http://imgur.com/
has A-Z a-z 0-9 (maybe some others) and is so far, 5 chars long, 8 should cover it forever if I wanted to limit that aspect of the patter, which I don't
ends in a .grraphic_file_format_extention (jpg, jpeg, gif, png)


Thats about it, at that url, with default settings, I should generally get back a good set of images.  I would not be objectionable to using the RSS feel url for the same page, it may be easier to parse actually.

Thanks everyone!

Edit
Thanks for a quick answer, my final command is now:
$curl -s http://www.reddit.com/r/pics/ | grep -ioE "http:\/\/imgur\.com\/.{1,10}\.(jpg|jpeg|gif|png)"

解决方案
Try:
http:\/\/imgur\.com\/.{5,8}\.(jpg|jpeg|gif|png)


                        
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