kais-odoo
ed268f81f4
Before this commit, when the user shares a portal link, the receiver has to click on the link to understand what it is about. This commit uses new key called `preview_object` inside `portal.frontend_layout` template. When it is defined, it will add some useful information for the preview link. This commit also defines `preview_object` in portal view of project and task to be able to have the preview link to prevent the user from having to click on the link to understand what it is about. task-3186692 closes odoo/odoo#113622 Related: odoo/enterprise#37514 Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>
88 lines
3.5 KiB
Python
88 lines
3.5 KiB
Python
# -*- coding: utf-8 -*-
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# Part of Odoo. See LICENSE file for full copyright and licensing details.
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from lxml import html
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import requests
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def get_link_preview_from_url(url, request_session=None):
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"""
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Get the Open Graph properties of an url. (https://ogp.me/)
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If the url leads directly to an image mimetype, return
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the url as preview image else retrieve the properties from
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the html page.
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Using a stream request to prevent loading the whole page
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as those properties are declared in the <head> tag.
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The request session is optional as in some cases using
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a session could be beneficial performance wise
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(e.g. a lot of url could have the same domain).
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"""
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# Some websites are blocking non browser user agent.
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user_agent = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0'}
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try:
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if request_session:
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response = request_session.get(url, timeout=3, headers=user_agent, allow_redirects=True, stream=True)
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else:
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response = requests.get(url, timeout=3, headers=user_agent, allow_redirects=True, stream=True)
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except requests.exceptions.RequestException:
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return False
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if not response.ok or not response.headers.get('Content-Type'):
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return False
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# Content-Type header can return a charset, but we just need the
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# mimetype (eg: image/jpeg;charset=ISO-8859-1)
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content_type = response.headers['Content-Type'].split(';')
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if response.headers['Content-Type'].startswith('image/'):
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return {
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'image_mimetype': content_type[0],
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'og_image': url, # If the url mimetype is already an image type, set url as preview image
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'source_url': url,
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}
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elif response.headers['Content-Type'].startswith('text/html'):
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return get_link_preview_from_html(url, response)
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return False
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def get_link_preview_from_html(url, response):
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"""
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Retrieve the Open Graph properties from the html page. (https://ogp.me/)
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Load the page with chunks of 8kb to prevent loading the whole
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html when we only need the <head> tag content.
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Fallback on the <title> tag if the html doesn't have
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any Open Graph title property.
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"""
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content = b""
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for chunk in response.iter_content(chunk_size=8192):
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content += chunk
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pos = content.find(b'</head>', -8196 * 2)
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# Stop reading once all the <head> data is found
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if pos != -1:
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content = content[:pos + 7]
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break
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if not content:
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return False
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tree = html.fromstring(content)
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og_title = tree.xpath('//meta[@property="og:title"]/@content')
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if og_title:
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og_title = og_title[0]
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elif tree.find('.//title') is not None:
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# Fallback on the <title> tag if it exists
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og_title = tree.find('.//title').text
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else:
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return False
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og_description = tree.xpath('//meta[@property="og:description"]/@content')
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og_type = tree.xpath('//meta[@property="og:type"]/@content')
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og_site_name = tree.xpath('//meta[@property="og:site_name"]/@content')
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og_image = tree.xpath('//meta[@property="og:image"]/@content')
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og_mimetype = tree.xpath('//meta[@property="og:image:type"]/@content')
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return {
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'og_description': og_description[0] if og_description else None,
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'og_image': og_image[0] if og_image else None,
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'og_mimetype': og_mimetype[0] if og_mimetype else None,
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'og_title': og_title,
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'og_type': og_type[0] if og_type else None,
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'og_site_name': og_site_name[0] if og_site_name else None,
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'source_url': url,
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}
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