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Highlight matched search term

Author:
doniyor
Posted:
May 13, 2014
Language:
Python
Version:
1.4
Tags:
highlighting custom-template-tag
Score:
0 (after 0 ratings)

sterm is the search term. text is the result search text.

it will highlight every matched search term in search result. please define your own .yellow css class.

use:

{{search_result_var|highlight:search_term}}

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@register.filter(needs_autoescape=True)
def highlight(text, sterm, autoescape=None):
    if autoescape:
        esc = conditional_escape
    else:
        esc = lambda x: x
    pattern = re.compile('(%s)' % esc(sterm), re.IGNORECASE)
    result = pattern.sub(r'<strong class="yellow">\1</strong>',text)
    return mark_safe(result)

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Comments

arthur (on May 14, 2014):

You should probably use str.replace(). If you want to use re you should escape input to the filter. If the search term is '.*' it will break, also see https://www.owasp.org/index.php/Regular_expression_Denial_of_Service_-_ReDoS

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doniyor (on May 14, 2014):

thanks Arthur, very good point. i didnot consider this case.

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