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# coding: utf8
A WeasyPrint-based web browser. In your web browser.
:copyright: Copyright 2011-2012 Simon Sapin and contributors, see AUTHORS.
:license: BSD, see LICENSE for details.
# Do NOT import unicode_literals here. Raw WSGI requires native strings.
from __future__ import division
import os.path
from weasyprint import HTML, CSS
from weasyprint.formatting_structure import boxes
from weasyprint.urls import url_is_absolute
from weasyprint.compat import parse_qs, base64_encode
FAVICON = os.path.join(os.path.dirname(__file__),
'tests', 'resources', 'icon.png')
STYLESHEET = CSS(string='''
:root { font-size: 10pt }
def find_links(box, links, anchors):
link =
# 'link' is inherited but redundant on text boxes
if link and not isinstance(box, boxes.TextBox):
type_, href =
if type_ == 'internal':
href = '#' + href
href = '/view/' + href
# "Border area. That's the area that hit-testing is done on."
links.append((href,) + box.hit_area())
anchor =
if anchor:
anchors.append((anchor,) + box.hit_area())
if isinstance(box, boxes.ParentBox):
for child in box.children:
find_links(child, links, anchors)
def get_pages(html):
document = html.render(enable_hinting=True, stylesheets=[STYLESHEET])
for page in document.pages:
links = []
anchors = []
find_links(page._page_box, links, anchors)
png_bytes, width, height = (
data_url = 'data:image/png;base64,' + (
base64_encode(png_bytes).decode('ascii').replace('\n', ''))
yield width, height, data_url, links, anchors
def render_template(url):
parts = ['''\
<!doctype html>
<meta charset=utf-8>
<title>WeasyPrint Navigator</title>
form { position: fixed; z-index: 1; top: 8px; left: 16px; right: 0; }
nav, input { font: 24px/30px sans-serif }
input:not([type]) { background: rgba(255, 255, 255, .9); border-width: 2px;
border-radius: 6px; padding: 0 3px }
input:not([type]):focus { outline: none }
body { margin-top: 0; padding-top: 50px }
section { box-shadow: 0 0 10px 2px #aaa; margin: 25px;
position: relative; overflow: hidden; }
section a { position: absolute; display: block }
section a[href]:hover, a[href]:focus { outline: 1px dotted }
nav { margin: 25px }
<body onload="var u=document.forms[0].url; u.value || u.focus()">
<form action="/" onsubmit="
window.location.href = '/view/' + this.url.value; return false;">
<input name=url style="width: 80%" placeholder="Enter an URL to start"
write = parts.append
if url:
html = HTML(url)
url = html.base_url
write('" />\n<input type=submit value=Go />\n')
if url:
write('<a href="/pdf/')
if url:
for width, height, data_url, links, anchors in get_pages(html):
write('<section style="width: {0}px; height: {1}px">\n'
' <img src="{2}">\n'.format(width, height, data_url))
for href, pos_x, pos_y, width, height in links:
write(' <a style="left: {0}px; top: {1}px; '
'width: {2}px; height: {3}px" href="{4}"></a>\n'
.format(pos_x, pos_y, width, height, href))
for anchor, pos_x, pos_y, width, height in anchors:
# Remove 60px to pos_y so that the real pos is below
# the address bar.
write(' <a style="left: {0}px; top: {1}px;" name="{2}"></a>\n'
.format(pos_x, pos_y - 60, anchor))
<li><a href="/view/">
<li><a href="/view/">
CSS specifications</a></li>
<li><a href="/view/">
English Wikipedia</a></li>
return ''.join(parts).encode('utf8')
def normalize_url(url, query_string=None):
if url:
if query_string:
url += '?' + query_string
if not url_is_absolute(url):
# Default to HTTP rather than relative filenames
url = 'http://' + url
return url
def app(environ, start_response):
def make_response(body, status='200 OK', headers=(),
content_type='text/html; charset=UTF-8'):
start_response(status, [
('Content-Type', content_type),
('Content-Length', str(len(body))),
] + list(headers))
return [body]
path = environ['PATH_INFO']
if path == '/favicon.ico':
with open(FAVICON, 'rb') as fd:
return make_response(, content_type='image/x-icon')
elif path.startswith('/pdf/') and len(path) > 5: # len('/pdf/') == 5
url = normalize_url(path[5:], environ.get('QUERY_STRING'))
body = HTML(url=url).write_pdf(stylesheets=[STYLESHEET])
filename = url.rstrip('/').rsplit('/', 1)[-1] or 'out'
return make_response(body, content_type='application/pdf',
'attachement; filename=%s.pdf' % filename)])
elif path.startswith('/view/'):
url = normalize_url(path[6:], environ.get('QUERY_STRING'))
return make_response(render_template(url))
elif path == '/':
args = parse_qs(environ.get('QUERY_STRING') or '')
url = normalize_url(args.get('url', [''])[0])
return make_response(render_template(url))
return make_response(b'<h1>Not Found</h1>', status='404 Not Found')
def run(port=5000):
host = ''
from werkzeug.serving import run_simple
except ImportError:
run_simple(host, port, app, use_reloader=True, use_debugger=True)
print('Could not import Werkzeug, running without the reloader '
'or debugger.')
from wsgiref.simple_server import make_server
server = make_server(host, port, app)
print('Listening on http://%s:%s/ ...' % (host, port))
if __name__ == '__main__':
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