I want to write a regular expression to parse this webpage(view-source:http://www.imdb.com/search/title?title=spiderman&title_type=feature). Basically I want to extract all the sections between <tr class=".+"> and </tr>. This webpage is a list of movies from imdb(http://www.imdb.com/search/title?title=spiderman&title_type=feature) and each section here indicates a movie. I tried the regular expression
<tr class=".+">(.+\n)+</tr>
However, it doesn't work. Also, I'm not allowed to use DOM. Does anyone have any suggestions? Thanks!
I strongly suggest you use a proper parser. But here is the regex for your case.
<tr class="(.+)">([\s\S]+?)</tr>
Related
So what I'm trying to do is add ":" character into a regular expression so that it come's to the matching value when I'm parsing all the values.
Here's the code that I'm parsing from:
<tr>
<td>165.227.124.179</td>
<td>3128</td>
</tr>
<tr>
<td>13.56.91.112</td>
<td>443</td>
</tr>
I need to get the values inside the "td" tags and add ":" between them like so:
165.227.124.179:3128
13.56.91.112:443
I get both of the values parsed, but what I can't find out is that is it possible to add the ":" character between these 2 values inside the regular expression and not after the matching value is parsed.
I've tried googling it real hard, but I just can't seem to get a right sort of match for the problem I have. Sorry if the question is confusing, I've gotten so confused along the way, feel free to ask a clearance.
Regex not recommended to parse html, but if you have to use it something like
Find <td>(\d+(?:\.\d+)+)</td>\s*<td>(\d+)</td>
Replace <td>$1:$2</td>
https://regex101.com/r/SiOgKy/1
I havent worked with regex before... But I need to parse values in about 500 urls and I need regex for automate it.
Each site contains about 10 values, I need to separate them to own list.
1.
<td width="78" style="padding-left:9px;" align="left"><a style="font-weight:bold;color:#E93393;" href="/meanings/Example1.html">Example1</a> </td>
2.
<td width="78" style="padding-left:9px;" align="left"><a style="font-weight:bold;color:#004EFF;" href="/meanings/Example2.html">Example2</a> </td>
So, I need to get those 2 values to separate list. It should look for color code to determine in which list value goes.
Could somebody help me? :)
NO..NO..NO..
Regex doesnt work for parsing HTML files..
HTML is not strict nor is it regular with its format..
Use htmlagilitypack
I am trying to determine in which column the name "Phone" appears, by checking the HTML of a web page.
The string in which I am doing the search looks like this :
<tr class="C1">
<td>Name</td>
<td>Address</td>
...
... < some more columns, but their number is not fixed >
...
<td>Phone</td>
...
... <more columns>
...
</tr>
Is it possible to determine using regular expressions ?
From the viewpoint of theoretical computer science: It is not possible, since tables could be nested; and regular expressions generally cannot cope with nested structures (you need a Typ-2-Grammer (Chomsky-Hierarchy), i.e. a Parser, to analyse the structure of a html-Text, it's not Typ-3, i.e. regular).
From a practical viewpoint, however, if you assume, that the tables are not nested, you could use a RegEx to extract table rows (something like <tr (?!</tr>)*</tr>), match the entries afterwards (something like <td (?!</td>)*</td>) to produce a List of columns and search that list for an Entry containing the string "Phone"....
Tough task. I'm referring you to various posts that explain why HTML parsing using RegEx is (virtually) imposibble:
RegEx match open tags except XHTML self-contained tags
https://stackoverflow.com/a/590789/290343
https://stackoverflow.com/a/133684/290343
I am working on a site that is using the unfortunate practice of wrapping <tr/> tags inside of <form/> tags for the purpose of being able to submit the contents of single rows as form posts to the server. The HTML is generated via XSL, and sometimes there is XSL flow control (<xsl:if/>, <xsl:choose/>, etc.) or <xsl:attribute/> tags between the <form/> and <tr/> tags.
Example:
<table>
<tbody>
<form id="row1_form">
<xsl:if test="test">
<xsl:attribute name="foo">bar</xsl:attribute>
</xsl:if>
<tr id="row1">
...
I am trying to write an regex that will find all the places that a "<tr" string occurs at some point after a "<form" string. The following works for this:
<form[^<]*?>[\s\w\<\:\>\/]*<tr
What I really need, though, is for the above regex to only match when the string "<table" does NOT occur between the "<form" and "<tr" strings. If the string "<table" does not occur between "<form" and "<tr", then I know that I have found an invalid placement of a form tag.
Thanks,
Matt
This regex will find a form containing a <tr with no preceding <table:
<form[^<]*(?:<(?!/?form|tr|table)[^<]*)*<tr\b
It does require that the tool support negative lookahead. Note that this regex implements Jeffrey Friedl's unrolling-the-loop efficiency technique and is quite fast.
If your regular expression engine supports negative lookarounds you can do:
<form[^<]*?>((?!<table)[\s\w\<\:\>\/])*<tr
I'm trying to figure out the regex for the following:
String</td><td>[number 0-100]%</td><td>[number 0-100]%</td><td>String</td><td>String</td>
Also, some of these td tags may have style attributes at some point.
I tried this:
String<.*>
and that returned
String</td>
but trying
String<.*><.*>
returned nothing. Why is this?
You probably shouldn't be trying to use a regex to parse HTML, because that way lies madness.
(.+)</td><td>(1?\d?\d)%</td><td>(1?\d?\d)%</td><td>(.+)</td><td>(.+)</td>
use Character class, like <td[^>]*> if <td> or <td class="abc">
Try the following:
(.+)(<[^>]+>){2}(1?\d?\d)%(<[^>]+>){2}(1?\d?\d)%(<[^>]+>){2}(.+)(<[^>]+>){2}(.+)<[^>]+>
You can test it here.
EDIT: Although this will work for most of the time, if there is > character in one attribute of the tag, this regex won't work.