def _parse_user_comment(val):
"""
Interprets a UserComment field value, supplied either as the raw value
or as a string containing comma separated byte codes.
"""
# Use the same data type conversion as the parse for field type 7
if CHAR_LIST_REGEX.match(val):
val = [parse_int(num) for num in val.split(',')]
# First 8 bytes gives string encoding - ASCII, JIS, or Unicode
encoding_char_1 = val[0:1]
val = val[8:]
# Decode the rest
if (type(val) != list):
# val was already a string
return val
else:
# val is a list of byte codes
encoding_char_1 = _safe_string(encoding_char_1)
if encoding_char_1 == '' or encoding_char_1 == 'A':
# ASCII
return _safe_string(val)
elif encoding_char_1 == 'J':
# JIS
return unicode(str(bytearray(val)), 'SJIS')
else:
# Unicode
return unicode(str(bytearray(val)))
def listen(self, tail=''):
parts = (tail + ' x x').split()[0:2]
nap_count = util.parse_int(parts[0], 30)
nap_time = util.parse_float(parts[1], 1)
for i in range(0, nap_count):
log.i([chr(b) for b in self.transport.peek()])
time.sleep(nap_time)
def handle_message(self, event, query):
number = parse_int(query)
if not number:
response = requests.get(_XKCD_API_CURRENT_URL)
response.raise_for_status()
number = response.json()['num']
return _XKCD_URL_TEMPLATE % number
def handle_message(self, event, query):
times = parse_int(query, default=1)
dice_gen = (random.randrange(1, 7) for _ in xrange(times))
if times > 10:
counter = Counter(dice_gen)
return ', '.join('%s: %s' % (k, counter[k]) for k in xrange(1, 7))
else:
return ', '.join(map(str, dice_gen))
def get_port(request):
"""
Returns the port number in use on a Flask/Werkzeug request object.
"""
sep_idx = request.host.find(':')
if sep_idx == -1:
return 443 if request.is_secure else 80
else:
return parse_int(request.host[sep_idx + 1:])
def _get_prop_val(prop_handlers, prop_val):
"""
Returns the string value of prop_val, as determined by the handlers in
prop_handlers (use _get_prop_handlers to obtain this object)
"""
try:
(_, field_type, print_fn, field_options) = prop_handlers
# Check for empty values
if not prop_val:
return ''
# Use custom handler if one is set
if print_fn:
return print_fn(prop_val)
if field_type:
if field_type in (5, 10):
# Ratios
sep_idx = prop_val.find('/')
if sep_idx > -1:
prop_val = Ratio(
parse_long(prop_val[0:sep_idx]),
parse_long(prop_val[sep_idx + 1:])
)
elif field_options:
# All those with pre-defined options are numeric, types 3, 4, or 7
vals = prop_val.split(',')
prop_val = ', '.join([field_options.get(parse_long(v), v) for v in vals])
elif field_type == 7:
# Custom encoding. Assume we have either a straight string or a
# string of comma separated byte codes. i.e. "ABC" or "65, 66, 67"
if CHAR_LIST_REGEX.match(prop_val):
prop_val = _safe_string([parse_int(num) for num in prop_val.split(',')])
else:
prop_val = _safe_string(prop_val)
else:
# Anything else we can just convert straight to a string
pass
# Return the string form of whatever we now have
return str(prop_val).strip()
except:
# Fall back to returning the value as-is
return str(prop_val).strip()
def diagnostics_submit():
required = set(('device', 'operating-system', 'udid', 'version', 'git-revision',
'build-date-epoch', 'time-since-launch', 'preprocessor-avg-runtime'))
if not required.issubset(set(request.form.keys())):
abort(404)
report = DiagnosticReport()
report.submit_date = datetime.datetime.utcnow()
report.device = request.form['device'].rstrip()
report.system = request.form['operating-system'].rstrip()
report.udid = request.form['udid'].rstrip()
report.version = request.form['version'].rstrip()
report.gitrev = request.form['git-revision'].rstrip()
report.build_date = parse_date_epoch(request.form['build-date-epoch'])
report.time_since_launch = parse_float(request.form['time-since-launch'])
report.preprocessor_avg_runtime = parse_int(request.form['preprocessor-avg-runtime'])
report.put()
return ''
def decompress(source, target):
# some info
logging.debug("Starting decompression of %s to %s", repr(source),
repr(target))
with open(source, "rb") as fsource:
# some info
logging.debug("Parsing header")
magic, method, majorversion, minorversion, pagesize, uncompressed_size = util.parse_header(
fsource)
logging.debug(" Magic number: %s", repr(magic))
logging.debug(" Method: %s", repr(method))
logging.debug(" Major version number: %d", majorversion)
logging.debug(" Minor version number: %d", minorversion)
logging.debug(" Page size: %d", pagesize)
logging.debug(" Uncompressed size: %d", uncompressed_size)
nointra, delta, inner = parse_method_name(method)
fsource.flush()
tmphandle, tmpfile = None, None
if inner == "gzip":
fsource = gzip.GzipFile(fileobj=fsource,
mode="rb",
compresslevel=9)
elif inner == "bzip2":
fsource = bz2file.BZ2File(filename=fsource,
mode="rb",
compresslevel=9)
elif inner == "7zip":
util.create_dir(".tmp")
tmphandle, tmpfile = tempfile.mkstemp(dir=".tmp")
with open(tmpfile, "wb") as ftmp:
p = subprocess.Popen(["7za", "x", "-txz", "-si", "-so"],
stdin=fsource,
stdout=ftmp,
stderr=subprocess.PIPE)
p.communicate()
fsource = open(tmpfile, "rb")
try:
reference = util.parse_string(fsource)
logging.debug("Reference dump: %s", reference)
# parse deduplicated pages
fills = {}
reference_list = list(util.parse_pagenr_list(fsource))
for i in xrange(len(reference_list)):
for left, right in util.parse_interval_list(fsource):
for pagenr in xrange(left, right + 1):
fills[pagenr] = reference_list[i]
# parse diffs
if delta:
diffs = {}
pagenrs = list(util.parse_pagenr_list(fsource))
for i in xrange(len(pagenrs)):
diffs[pagenrs[i]] = util.parse_diff(fsource, pagesize)
# parse new pages
newpages = {}
newdistinct = set()
if nointra:
for left, right in list(util.parse_interval_list(fsource)):
for j in xrange(left, right + 1):
page = fsource.read(pagesize)
newdistinct.add(page)
newpages[j] = page
else:
newcnt = util.parse_int(fsource, 4)
intervals = []
for _ in xrange(newcnt):
intervals.append(list(util.parse_interval_list(fsource)))
for i in xrange(newcnt):
page = fsource.read(pagesize)
for left, right in intervals[i]:
for j in xrange(left, right + 1):
newdistinct.add(page)
newpages[j] = page
finally:
if tmphandle is not None:
os.close(tmphandle)
os.remove(tmpfile)
if inner is not None:
fsource.close()
# reconstruct file
pagenr = 0
final = uncompressed_size / pagesize
same_distinct, same_total = set(), 0
different_distinct, different_total = set(), 0
seen = set()
diff_seen = set()
with open(reference, "rb") as freference:
with open(target, "wb") as ftarget:
while pagenr < final:
if pagenr in fills:
freference.seek(pagesize * fills[pagenr])
page = freference.read(pagesize)
seen.add(page)
different_distinct.add(page)
different_total += 1
ftarget.write(page)
elif delta and pagenr in diffs:
freference.seek(pagenr * pagesize)
page = freference.read(pagesize)
newpage = util.apply_diff(page, diffs[pagenr])
diff_seen.add(newpage)
ftarget.write(newpage)
elif pagenr in newpages:
seen.add(newpages[pagenr])
ftarget.write(newpages[pagenr])
else:
freference.seek(pagesize * pagenr)
page = freference.read(pagesize)
seen.add(page)
same_distinct.add(page)
same_total += 1
ftarget.write(page)
pagenr += 1
# some info
logging.debug("New pages: %d/%d (%d/%d)", len(newpages), final,
len(newdistinct), len(seen))
logging.debug("Deduplicated pages at the same offset: %d/%d (%d/%d)",
same_total, final, len(same_distinct), len(seen))
logging.debug("Deduplicated pages at different offsets: %d/%d (%d/%d)",
len(fills), final, len(different_distinct), len(seen))
logging.debug("Deduplicated pages in total: %d/%d (%d/%d)",
same_total + len(fills), final,
len(same_distinct | different_distinct), len(seen))
if delta:
logging.debug("Diffed pages: %d/%d (%d/%d)", len(diffs), final,
len(diff_seen), len(seen))
logging.debug("Done")
return 0
def image():
logger.debug(request.method + ' ' + request.url)
try:
logged_in = session_logged_in()
allow_uncache = app.config['BENCHMARKING'] or app.config['DEBUG']
args = request.args
# Get URL parameters for the image
src = args.get('src', '')
page = args.get('page', None)
iformat = args.get('format', None)
template = args.get('tmp', None)
width = args.get('width', None)
height = args.get('height', None)
halign = args.get('halign', None)
valign = args.get('valign', None)
autosizefit = args.get('autosizefit', None)
rotation = args.get('angle', None)
flip = args.get('flip', None)
top = args.get('top', None)
left = args.get('left', None)
bottom = args.get('bottom', None)
right = args.get('right', None)
autocropfit = args.get('autocropfit', None)
fill = args.get('fill', None)
quality = args.get('quality', None)
sharpen = args.get('sharpen', None)
ov_src = args.get('overlay', None)
ov_size = args.get('ovsize', None)
ov_opacity = args.get('ovopacity', None)
ov_pos = args.get('ovpos', None)
icc_profile = args.get('icc', None)
icc_intent = args.get('intent', None)
icc_bpc = args.get('bpc', None)
colorspace = args.get('colorspace', None)
strip = args.get('strip', None)
dpi = args.get('dpi', None)
tile = args.get('tile', None)
# Get URL parameters for handling options
attach = args.get('attach', None)
xref = args.get('xref', None)
stats = args.get('stats', None)
# Get protected admin/internal parameters
cache = args.get('cache', '1') if logged_in or allow_uncache else '1'
recache = args.get('recache', None) if allow_uncache else None
# eRez compatibility mode
src = erez_params_compat(src)
# Tweak strings as necessary and convert non-string parameters
# to the correct data types
try:
# Image options
if page is not None:
page = parse_int(page)
if iformat is not None:
iformat = iformat.lower()
if template is not None:
template = template.lower()
if width is not None:
width = parse_int(width)
if height is not None:
height = parse_int(height)
if halign is not None:
halign = halign.lower()
if valign is not None:
valign = valign.lower()
if autosizefit is not None:
autosizefit = parse_boolean(autosizefit)
if rotation is not None:
rotation = parse_float(rotation)
if flip is not None:
flip = flip.lower()
if top is not None:
top = parse_float(top)
if left is not None:
left = parse_float(left)
if bottom is not None:
bottom = parse_float(bottom)
if right is not None:
right = parse_float(right)
if autocropfit is not None:
autocropfit = parse_boolean(autocropfit)
if fill is not None:
fill = parse_colour(fill)
if quality is not None:
quality = parse_int(quality)
if sharpen is not None:
sharpen = parse_int(sharpen)
if ov_size is not None:
ov_size = parse_float(ov_size)
if ov_pos is not None:
ov_pos = ov_pos.lower()
if ov_opacity is not None:
ov_opacity = parse_float(ov_opacity)
if icc_profile is not None:
icc_profile = icc_profile.lower()
if icc_intent is not None:
icc_intent = icc_intent.lower()
if icc_bpc is not None:
icc_bpc = parse_boolean(icc_bpc)
if colorspace is not None:
colorspace = colorspace.lower()
if strip is not None:
strip = parse_boolean(strip)
if dpi is not None:
dpi = parse_int(dpi)
if tile is not None:
tile = parse_tile_spec(tile)
# Handling options
if attach is not None:
attach = parse_boolean(attach)
if xref is not None:
validate_string(xref, 0, 1024)
if stats is not None:
stats = parse_boolean(stats)
# Admin/internal options
if cache is not None:
cache = parse_boolean(cache)
if recache is not None:
recache = parse_boolean(recache)
except (ValueError, TypeError) as e:
raise httpexc.BadRequest(unicode(e))
# Package and validate the parameters
try:
# #2694 Enforce public image limits - perform easy parameter checks
if not logged_in:
width, height, autosizefit = _public_image_limits_pre_image_checks(
width, height, autosizefit, tile, template
)
# Store and normalise all the parameters
image_attrs = ImageAttrs(src, -1, page, iformat, template,
width, height, halign, valign,
rotation, flip,
top, left, bottom, right, autocropfit,
autosizefit, fill, quality, sharpen,
ov_src, ov_size, ov_pos, ov_opacity,
icc_profile, icc_intent, icc_bpc,
colorspace, strip, dpi, tile)
image_engine.finalise_image_attrs(image_attrs)
except ValueError as e:
raise httpexc.BadRequest(unicode(e))
# Get/create the database ID (from cache, validating path on create)
image_id = data_engine.get_or_create_image_id(
image_attrs.filename(),
return_deleted=False,
on_create=on_image_db_create_anon_history
)
if (image_id == 0):
raise DoesNotExistError() # Deleted
elif (image_id < 0):
raise DBError('Failed to add image to database')
image_attrs.set_database_id(image_id)
# Require view permission or file admin
permissions_engine.ensure_folder_permitted(
image_attrs.folder_path(),
FolderPermission.ACCESS_VIEW,
get_session_user()
)
# Ditto for overlays
if ov_src:
permissions_engine.ensure_folder_permitted(
filepath_parent(ov_src),
FolderPermission.ACCESS_VIEW,
get_session_user()
)
# v1.17 If this is a conditional request with an ETag, see if we can just return a 304
if 'If-None-Match' in request.headers and not recache:
etag_valid, modified_time = _etag_is_valid(
image_attrs,
request.headers['If-None-Match'],
False
)
if etag_valid:
# Success HTTP 304
return make_304_response(image_attrs, False, modified_time)
# Get the requested image data
image_wrapper = image_engine.get_image(
image_attrs,
'refresh' if recache else cache
)
if (image_wrapper is None):
raise DoesNotExistError()
# #2694 Enforce public image limits - check the dimensions
# of images that passed the initial parameter checks
if not logged_in:
try:
_public_image_limits_post_image_checks(
image_attrs.width(),
image_attrs.height(),
image_attrs.template(),
image_wrapper.data(),
image_wrapper.attrs().format()
)
except ValueError as e:
raise httpexc.BadRequest(unicode(e)) # As for the pre-check
# Success HTTP 200
return make_image_response(image_wrapper, False, stats, attach, xref)
except httpexc.HTTPException:
# Pass through HTTP 4xx and 5xx
raise
except ServerTooBusyError:
logger.warn(u'503 Too busy for ' + request.url)
raise httpexc.ServiceUnavailable()
except ImageError as e:
logger.warn(u'415 Invalid image file \'' + src + '\' : ' + unicode(e))
raise httpexc.UnsupportedMediaType(unicode(e))
except SecurityError as e:
if app.config['DEBUG']:
raise
log_security_error(e, request)
raise httpexc.Forbidden()
except DoesNotExistError as e:
# First time around the ID will be set. Next time around it
# won't but we should check whether the disk file now exists.
if image_attrs.database_id() > 0 or path_exists(image_attrs.filename(), require_file=True):
image_engine.reset_image(image_attrs)
logger.warn(u'404 Not found: ' + unicode(e))
raise httpexc.NotFound(unicode(e))
except Exception as e:
if app.config['DEBUG']:
raise
logger.error(u'500 Error for ' + request.url + '\n' + unicode(e))
raise httpexc.InternalServerError(unicode(e))
async def fetch_playlist(playlistId: str, chunk_size: int = 1024):
"""
Fetch all metadata of a YouTube playlist.
Performs multiple asynchronous HTTP requests to obtain all metadata and
playlist items. Does not provide rich YouTube metadata: fields that are
included in browse_request queries for modern JS YT-Clients.
Result:
{
'id': string,
'title': string,
'description': string,
'thumbnail': string,
'length': integer,
'views': integer,
'uploader': {
'name': string,
'url': string
},
'items': [
{
'id': string,
'title': string,
'uploader': {
'name': string,
'url': string
},
'lengthSeconds': integer,
}
]
}
"""
#
# Initialize the result
#
playlist = {'id': playlistId, 'items': []}
#
# Build the headers for the ClientSession.
#
headers = get_default_headers()
# Only accept HTML.
headers['Accept'] = 'text/html'
#
# Retrieve landing page.
#
# Open a auto-raising ClientSession with default cookie handling.
async with ClientSession(headers=headers,
raise_for_status=True) as session:
# Step 1: Get the initial landing page.
async with session.get('https://www.youtube.com/playlist',
params={'list': playlistId}) as response:
# Assert that this really worked the way we wanted.
assert response.status == 200
assert response.content_type == 'text/html'
encoding = response.get_encoding()
assert is_valid_encoding(encoding)
# Retrieve the '//div[@id=""]' node.
is_content = lambda x: (x.tag, x.get('id')) == ('div', '')
parser = etree.HTMLPullParser(events=('start', 'end'))
content, discard = None, True
while content is None and not response.content.at_eof():
# Feed the parser the next chunk of data.
parser.feed(
(await response.content.read(chunk_size)).decode(encoding))
for event, node in parser.read_events():
if event == 'start':
if is_content(node):
# Content node reached, stop discarding.
discard = False
continue
if is_content(node):
# Content node finished, exit.
content = node
break
if discard:
# Discard everything before this point.
node.clear()
for ancestor in node.xpath('ancestor-or-self::*'):
while ancestor.getprevious() is not None:
del ancestor.getparent()[0]
#
# Parse the playlist header.
#
pl_header = content[0]
assert pl_header.get('id') == 'pl-header'
# Get the thumbnail.
pl_thumb = pl_header[0][0]
assert pl_thumb.tag == 'img'
playlist['thumbnail'] = pl_thumb.get('src')
# Get the title.
pl_title = pl_header[1][0]
assert pl_title.tag == 'h1'
playlist['title'] = pl_title.text.strip()
# Get the uploader.
pl_uploader = pl_header[1][1][0][0]
assert pl_uploader.tag == 'a'
playlist['uploader'] = {
'name': pl_uploader.text,
'url': 'https://www.youtube.com' + pl_uploader.get('href')
}
# Get the length.
pl_length = pl_header[1][1][1]
assert pl_length.tag == 'li'
playlist['length'] = parse_int(pl_length.text, aggressive=True)
# Get the view count.
pl_views = pl_header[1][1][2]
assert pl_views.tag == 'li'
playlist['views'] = parse_int(pl_views.text, aggressive=True)
# Get the description.
pl_description = pl_header[1][2][0]
assert pl_description.tag == 'span'
playlist['description'] = pl_description.text.strip()
#
# Parse the playlist items.
#
def parse_item(node):
item = {'id': node.get('data-video-id')}
# Get the video thumbnail.
vid_thumb = node[2][0][0][0][0][0][0]
assert vid_thumb.tag == 'img'
item['thumbnail'] = vid_thumb.get('data-thumb')
# Get video title.
vid_title = node[3][0]
assert vid_title.tag == 'a'
item['title'] = vid_title.text.strip()
# Get video uploader.
vid_uploader = node[3][1][0]
assert vid_uploader.tag == 'a'
item['uploader'] = {
'name': vid_uploader.text,
'url': 'https://www.youtube.com' + vid_uploader.get('href')
}
# Get video length.
vid_length = node[6][0][0][0]
assert vid_length.tag == 'span'
item['lengthSeconds'] = parse_ts(vid_length.text)
return item
pl_items = content[1][0][0][0][0]
assert pl_items.get('id') == 'pl-load-more-destination'
playlist['items'] += map(parse_item, pl_items)
#
# Fetch and parse all continuations.
#
load_more = index_s(content, 1, 0, 0, 1)
assert load_more.tag == 'button'
load_more = load_more.get(
'data-uix-load-more-href') if load_more is not None else None
while load_more is not None:
# Request the continuation contents.
async with session.get('https://www.youtube.com' + load_more,
headers={'Accept':
'application/json'}) as response:
# Assert that this really worked the way we wanted.
assert response.status == 200
assert response.content_type == 'application/json'
encoding = response.get_encoding()
assert is_valid_encoding(encoding)
# Parse the result data (large!)
# TODO: This ought to be streamed as well.
data = await response.json()
assert 'content_html' in data
assert 'load_more_widget_html' in data
# Parse all new items.
parser = etree.HTMLPullParser(events=('end', ))
parser.feed(data['content_html'])
for _, node in parser.read_events():
if node.tag == 'tr':
playlist['items'] += [parse_item(node)]
# Discard everything before this point.
node.clear()
for ancestor in node.xpath('ancestor-or-self::*'):
while ancestor.getprevious() is not None:
del ancestor.getparent()[0]
# Extract the next continuation link
match = re.search(r'data-uix-load-more-href=\"(.+?)\"',
data['load_more_widget_html'])
if match:
# Next continuation link.
load_more = match.group(1)
else:
# No more continuations.
load_more = None
return playlist
def decompress(source, target):
# some info
logging.debug("Starting decompression of %s to %s", repr(source),
repr(target))
with open(source, "rb") as fsource:
# some info
logging.debug("Parsing header")
magic, method, majorversion, minorversion, pagesize, uncompressed_size = util.parse_header(
fsource)
logging.debug(" Magic number: %s", repr(magic))
logging.debug(" Method: %s", repr(method))
logging.debug(" Major version number: %d", majorversion)
logging.debug(" Minor version number: %d", minorversion)
logging.debug(" Page size: %d", pagesize)
logging.debug(" Uncompressed size: %d", uncompressed_size)
inner = method.split("intradedup")[1]
if not method.startswith("intradedup") or inner not in ("", "gzip",
"bzip2",
"7zip"):
logging.error("Invalid method %s", repr(method))
return -1
fsource.flush()
tmphandle, tmpfile = None, None
if inner == "gzip":
fsource = gzip.GzipFile(fileobj=fsource,
mode="rb",
compresslevel=9)
elif inner == "bzip2":
fsource = bz2file.BZ2File(filename=fsource,
mode="rb",
compresslevel=9)
elif inner == "7zip":
util.create_dir(".tmp")
tmphandle, tmpfile = tempfile.mkstemp(dir=".tmp")
with open(tmpfile, "wb") as ftmp:
p = subprocess.Popen(["7za", "x", "-txz", "-si", "-so"],
stdin=fsource,
stdout=ftmp,
stderr=subprocess.PIPE)
p.communicate()
fsource = open(tmpfile, "rb")
try:
# parse dictionary
distinct = util.parse_int(fsource, 4)
fills = {}
pagelist = []
for _ in xrange(distinct):
page = fsource.read(pagesize)
pagelist.append(page)
for i in xrange(distinct):
for left, right in util.parse_interval_list(fsource):
for pagenr in xrange(left, right + 1):
fills[pagenr] = pagelist[i]
# reconstruct file
pagenr = 0
seen = set()
with open(target, "wb") as ftarget:
while True:
if pagenr in fills:
ftarget.write(fills[pagenr])
seen.add(fills[pagenr])
else:
page = fsource.read(pagesize)
seen.add(page)
if not page:
pagenr += 1
break
ftarget.write(page)
pagenr += 1
while pagenr in fills:
ftarget.write(fills[pagenr])
seen.add(fills[pagenr])
pagenr += 1
logging.debug("Deduplicated pages: %d/%d (%d/%d)", len(fills),
uncompressed_size / pagesize, distinct, len(seen))
finally:
if tmphandle is not None:
os.close(tmphandle)
os.remove(tmpfile)
if inner is not None:
fsource.close()
logging.debug("Done")
return 0
