page-simplify/app/app.py

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from bottle import route, run, template, request
from bs4 import BeautifulSoup, Tag
import time
import urllib
targets = {
"html2_0": {
"elements": [
"div", "a", "address", "b", "base", "blockquote", "body", "br", "cite", "code", "dd", "dir", "dl", "dt", "em", "form", "h1", "h2", "h3", "h4", "h5", "h6", "head", "hr", "html", "i", "img", "input", "isindex", "kbd", "li", "listing", "menu", "meta", "nextid", "ol", "option", "p", "plaintext", "pre", "samp", "select", "strong", "textarea", "title", "tt", "ul", "var", "xmp"
# "link"
],
"flatten_elements": [
"cite", "span", "address", "samp", "p", "div"
],
"allowed_attributes": {
"a": ["href", "methods", "name", "rel", "rev", "title", "urn" ],
"base": ["href"],
"dir": ["compact"],
"dl": ["compact"],
"form": ["action", "enctype", "method"],
"html": ["version"],
"img": ["align", "alt", "ismap", "src"],
"input": ["align", "checked", "maxlength", "name", "size", "src", "type", "value"],
"link": ["href", "methods", "rel", "rev", "title", "urn"],
"menu": ["compact"],
"meta": ["content", "http-equiv", "name"],
"nextid": ["n"],
"ol": ["compact"],
"option": ["selected", "value"],
"pre": ["width"],
"select": ["multiple", "name", "size"],
"textarea": ["cols", "name", "rows"],
"ul": ["compact"]
}
}
}
def parse_for_target(src, target, targets_dict):
current_target = targets_dict[target]
target_tags = current_target["elements"]
allowed_attrs = current_target["allowed_attributes"]
flatten_elements = current_target["flatten_elements"]
html = BeautifulSoup(src, "html.parser")
body = html.find("body")
final_html = ""
for x in body.find_all(recursive=True):
# Remove the element if its not in our allowlist
if (x.name not in target_tags):
x.extract()
continue
# Strip all attributes aside from the ones we added into the allowlist
new_attrs = {}
for key, value in list(x.attrs.items()):
if (x.name in allowed_attrs) and (key in allowed_attrs[x.name]):
new_attrs[key] = value
x.attrs = new_attrs
# Remove elements that have no content and no attributes
if (len(x.get_text(strip=True)) == 0 and x.attrs == {}):
x.extract()
for x in body.find_all(flatten_elements, recursive=True):
x.unwrap()
for t in body:
final_html += str(t)
return final_html
@route('/page/html20/view')
def index():
print("* process page begin - target: html20(html2_0); via: http")
print(" --> fetch page begin")
fetch_start_time = time.time()
chosen_page_content = urllib.request.urlopen(request.query.url)
fetch_end_time = time.time()
fetch_time_taken = round(fetch_end_time - fetch_start_time, 3)
print(f" --> fetch page finished - time_taken: { fetch_time_taken }s")
print(" --> render page begin")
render_page_start_time = time.time()
parsed_page = parse_for_target(chosen_page_content, "html2_0", targets)
render_page_end_time = time.time()
render_page_time_taken = round(render_page_end_time - render_page_start_time, 3)
print(f" --> render page finished - time_taken: { render_page_time_taken }s")
total_time_taken = round(render_page_time_taken + fetch_time_taken, 3)
print(f"* process page finished - total_time_taken: { total_time_taken }s")
return parsed_page
run(host='localhost', port=8080)