Mercurial > repos > shellac > sam_consensus_v3
diff env/lib/python3.9/site-packages/galaxy/util/checkers.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/env/lib/python3.9/site-packages/galaxy/util/checkers.py Mon Mar 22 18:12:50 2021 +0000 @@ -0,0 +1,179 @@ +import bz2 +import gzip +import re +import tarfile +import zipfile +from io import ( + BytesIO, + StringIO +) + +from galaxy import util +from galaxy.util.image_util import image_type + +HTML_CHECK_LINES = 100 +CHUNK_SIZE = 2 ** 15 # 32Kb +HTML_REGEXPS = ( + re.compile(r"<A\s+[^>]*HREF[^>]+>", re.I), + re.compile(r"<IFRAME[^>]*>", re.I), + re.compile(r"<FRAMESET[^>]*>", re.I), + re.compile(r"<META[\W][^>]*>", re.I), + re.compile(r"<SCRIPT[^>]*>", re.I), +) + + +def check_html(name, file_path=True): + """ + Returns True if the file/string contains HTML code. + """ + # Handles files if file_path is True or text if file_path is False + if file_path: + temp = open(name, encoding='utf-8') + else: + temp = StringIO(util.unicodify(name)) + try: + for _ in range(HTML_CHECK_LINES): + line = temp.readline(CHUNK_SIZE) + if not line: + break + if any(regexp.search(line) for regexp in HTML_REGEXPS): + return True + except UnicodeDecodeError: + return False + finally: + temp.close() + return False + + +def check_binary(name, file_path=True): + # Handles files if file_path is True or text if file_path is False + if file_path: + temp = open(name, "rb") + else: + temp = BytesIO(name) + try: + return util.is_binary(temp.read(1024)) + finally: + temp.close() + + +def check_gzip(file_path, check_content=True): + # This method returns a tuple of booleans representing ( is_gzipped, is_valid ) + # Make sure we have a gzipped file + try: + with open(file_path, "rb") as temp: + magic_check = temp.read(2) + if magic_check != util.gzip_magic: + return (False, False) + except Exception: + return (False, False) + # We support some binary data types, so check if the compressed binary file is valid + # If the file is Bam, it should already have been detected as such, so we'll just check + # for sff format. + try: + with gzip.open(file_path, 'rb') as fh: + header = fh.read(4) + if header == b'.sff': + return (True, True) + except Exception: + return(False, False) + + if not check_content: + return (True, True) + + with gzip.open(file_path, mode='rb') as gzipped_file: + chunk = gzipped_file.read(CHUNK_SIZE) + # See if we have a compressed HTML file + if check_html(chunk, file_path=False): + return (True, False) + return (True, True) + + +def check_bz2(file_path, check_content=True): + try: + with open(file_path, "rb") as temp: + magic_check = temp.read(3) + if magic_check != util.bz2_magic: + return (False, False) + except Exception: + return(False, False) + + if not check_content: + return (True, True) + + with bz2.BZ2File(file_path, mode='rb') as bzipped_file: + chunk = bzipped_file.read(CHUNK_SIZE) + # See if we have a compressed HTML file + if check_html(chunk, file_path=False): + return (True, False) + return (True, True) + + +def check_zip(file_path, check_content=True, files=1): + if not zipfile.is_zipfile(file_path): + return (False, False) + + if not check_content: + return (True, True) + + chunk = None + for filect, member in enumerate(iter_zip(file_path)): + handle, name = member + chunk = handle.read(CHUNK_SIZE) + if chunk and check_html(chunk, file_path=False): + return (True, False) + if filect >= files: + break + return (True, True) + + +def is_bz2(file_path): + is_bz2, is_valid = check_bz2(file_path, check_content=False) + return is_bz2 + + +def is_gzip(file_path): + is_gzipped, is_valid = check_gzip(file_path, check_content=False) + return is_gzipped + + +def is_zip(file_path): + is_zipped, is_valid = check_zip(file_path, check_content=False) + return is_zipped + + +def is_single_file_zip(file_path): + for i, _ in enumerate(iter_zip(file_path)): + if i > 1: + return False + return True + + +def is_tar(file_path): + return tarfile.is_tarfile(file_path) + + +def iter_zip(file_path): + with zipfile.ZipFile(file_path) as z: + for f in filter(lambda x: not x.endswith('/'), z.namelist()): + yield (z.open(f), f) + + +def check_image(file_path): + """ Simple wrapper around image_type to yield a True/False verdict """ + if image_type(file_path): + return True + return False + + +__all__ = ( + 'check_binary', + 'check_bz2', + 'check_gzip', + 'check_html', + 'check_image', + 'check_zip', + 'is_gzip', + 'is_bz2', + 'is_zip', +)