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77 lines
2.4 KiB
ReStructuredText
77 lines
2.4 KiB
ReStructuredText
===============================
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Preparation for offline engines
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===============================
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Offline engines
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===============
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To extend the functionality of searx, offline engines are going to be
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introduced. An offline engine is an engine which does not need Internet
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connection to perform a search and does not use HTTP to communicate.
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Offline engines can be configured as online engines, by adding those to the
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`engines` list of :origin:`settings.yml <searx/settings.yml>`. Thus, searx
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finds the engine file and imports it.
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Example skeleton for the new engines:
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.. code:: python
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from subprocess import PIPE, Popen
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categories = ['general']
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offline = True
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def init(settings):
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pass
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def search(query, params):
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process = Popen(['ls', query], stdout=PIPE)
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return_code = process.wait()
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if return_code != 0:
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raise RuntimeError('non-zero return code', return_code)
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results = []
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line = process.stdout.readline()
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while line:
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result = parse_line(line)
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results.append(results)
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line = process.stdout.readline()
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return results
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Development progress
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====================
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First, a proposal has been created as a Github issue. Then it was moved to the
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wiki as a design document. You can read it here: :wiki:`Offline-engines`.
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In this development step, searx core was prepared to accept and perform offline
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searches. Offline search requests are scheduled together with regular offline
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requests.
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As offline searches can return arbitrary results depending on the engine, the
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current result templates were insufficient to present such results. Thus, a new
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template is introduced which is caplable of presenting arbitrary key value pairs
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as a table. You can check out the pull request for more details see
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:pull-searx:`1700`.
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Next steps
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==========
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Today, it is possible to create/run an offline engine. However, it is going to be publicly available for everyone who knows the searx instance. So the next step is to introduce token based access for engines. This way administrators are able to limit the access to private engines.
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Acknowledgement
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===============
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This development was sponsored by `Search and Discovery Fund`_ of `NLnet Foundation`_ .
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.. _Search and Discovery Fund: https://nlnet.nl/discovery
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.. _NLnet Foundation: https://nlnet.nl/
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| Happy hacking.
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| kvch // 2019.10.21 17:03
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