1from __future__ import unicode_literals
2
3import hashlib
4import json
5import os
6import platform
7import subprocess
8import sys
9import traceback
10from zipimport import zipimporter
11
12from .compat import compat_realpath
13from .utils import encode_compat_str, Popen, write_string
14
15from .version import __version__
16
17
18'''  # Not signed
19def rsa_verify(message, signature, key):
20    from hashlib import sha256
21    assert isinstance(message, bytes)
22    byte_size = (len(bin(key[0])) - 2 + 8 - 1) // 8
23    signature = ('%x' % pow(int(signature, 16), key[1], key[0])).encode()
24    signature = (byte_size * 2 - len(signature)) * b'0' + signature
25    asn1 = b'3031300d060960864801650304020105000420'
26    asn1 += sha256(message).hexdigest().encode()
27    if byte_size < len(asn1) // 2 + 11:
28        return False
29    expected = b'0001' + (byte_size - len(asn1) // 2 - 3) * b'ff' + b'00' + asn1
30    return expected == signature
31'''
32
33
34def detect_variant():
35    if hasattr(sys, 'frozen'):
36        prefix = 'mac' if sys.platform == 'darwin' else 'win'
37        if getattr(sys, '_MEIPASS', None):
38            if sys._MEIPASS == os.path.dirname(sys.executable):
39                return f'{prefix}_dir'
40            return f'{prefix}_exe'
41        return 'py2exe'
42    elif isinstance(globals().get('__loader__'), zipimporter):
43        return 'zip'
44    elif os.path.basename(sys.argv[0]) == '__main__.py':
45        return 'source'
46    return 'unknown'
47
48
49_NON_UPDATEABLE_REASONS = {
50    'win_exe': None,
51    'zip': None,
52    'mac_exe': None,
53    'py2exe': None,
54    'win_dir': 'Auto-update is not supported for unpackaged windows executable; Re-download the latest release',
55    'mac_dir': 'Auto-update is not supported for unpackaged MacOS executable; Re-download the latest release',
56    'source': 'You cannot update when running from source code; Use git to pull the latest changes',
57    'unknown': 'It looks like you installed yt-dlp with a package manager, pip, setup.py or a tarball; Use that to update',
58}
59
60
61def is_non_updateable():
62    return _NON_UPDATEABLE_REASONS.get(detect_variant(), _NON_UPDATEABLE_REASONS['unknown'])
63
64
65def run_update(ydl):
66    """
67    Update the program file with the latest version from the repository
68    Returns whether the program should terminate
69    """
70
71    JSON_URL = 'https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest'
72
73    def report_error(msg, expected=False):
74        ydl.report_error(msg, tb='' if expected else None)
75
76    def report_unable(action, expected=False):
77        report_error(f'Unable to {action}', expected)
78
79    def report_permission_error(file):
80        report_unable(f'write to {file}; Try running as administrator', True)
81
82    def report_network_error(action, delim=';'):
83        report_unable(f'{action}{delim} Visit  https://github.com/yt-dlp/yt-dlp/releases/latest', True)
84
85    def calc_sha256sum(path):
86        h = hashlib.sha256()
87        b = bytearray(128 * 1024)
88        mv = memoryview(b)
89        with open(os.path.realpath(path), 'rb', buffering=0) as f:
90            for n in iter(lambda: f.readinto(mv), 0):
91                h.update(mv[:n])
92        return h.hexdigest()
93
94    # Download and check versions info
95    try:
96        version_info = ydl._opener.open(JSON_URL).read().decode('utf-8')
97        version_info = json.loads(version_info)
98    except Exception:
99        return report_network_error('obtain version info', delim='; Please try again later or')
100
101    def version_tuple(version_str):
102        return tuple(map(int, version_str.split('.')))
103
104    version_id = version_info['tag_name']
105    ydl.to_screen(f'Latest version: {version_id}, Current version: {__version__}')
106    if version_tuple(__version__) >= version_tuple(version_id):
107        ydl.to_screen(f'yt-dlp is up to date ({__version__})')
108        return
109
110    err = is_non_updateable()
111    if err:
112        return report_error(err, True)
113
114    # sys.executable is set to the full pathname of the exe-file for py2exe
115    # though symlinks are not followed so that we need to do this manually
116    # with help of realpath
117    filename = compat_realpath(sys.executable if hasattr(sys, 'frozen') else sys.argv[0])
118    ydl.to_screen(f'Current Build Hash {calc_sha256sum(filename)}')
119    ydl.to_screen(f'Updating to version {version_id} ...')
120
121    version_labels = {
122        'zip_3': '',
123        'win_exe_64': '.exe',
124        'py2exe_64': '_min.exe',
125        'win_exe_32': '_x86.exe',
126        'mac_exe_64': '_macos',
127    }
128
129    def get_bin_info(bin_or_exe, version):
130        label = version_labels['%s_%s' % (bin_or_exe, version)]
131        return next((i for i in version_info['assets'] if i['name'] == 'yt-dlp%s' % label), {})
132
133    def get_sha256sum(bin_or_exe, version):
134        filename = 'yt-dlp%s' % version_labels['%s_%s' % (bin_or_exe, version)]
135        urlh = next(
136            (i for i in version_info['assets'] if i['name'] in ('SHA2-256SUMS')),
137            {}).get('browser_download_url')
138        if not urlh:
139            return None
140        hash_data = ydl._opener.open(urlh).read().decode('utf-8')
141        return dict(ln.split()[::-1] for ln in hash_data.splitlines()).get(filename)
142
143    if not os.access(filename, os.W_OK):
144        return report_permission_error(filename)
145
146    # PyInstaller
147    variant = detect_variant()
148    if variant in ('win_exe', 'py2exe'):
149        directory = os.path.dirname(filename)
150        if not os.access(directory, os.W_OK):
151            return report_permission_error(directory)
152        try:
153            if os.path.exists(filename + '.old'):
154                os.remove(filename + '.old')
155        except (IOError, OSError):
156            return report_unable('remove the old version')
157
158        try:
159            arch = platform.architecture()[0][:2]
160            url = get_bin_info(variant, arch).get('browser_download_url')
161            if not url:
162                return report_network_error('fetch updates')
163            urlh = ydl._opener.open(url)
164            newcontent = urlh.read()
165            urlh.close()
166        except (IOError, OSError):
167            return report_network_error('download latest version')
168
169        try:
170            with open(filename + '.new', 'wb') as outf:
171                outf.write(newcontent)
172        except (IOError, OSError):
173            return report_permission_error(f'{filename}.new')
174
175        expected_sum = get_sha256sum(variant, arch)
176        if not expected_sum:
177            ydl.report_warning('no hash information found for the release')
178        elif calc_sha256sum(filename + '.new') != expected_sum:
179            report_network_error('verify the new executable')
180            try:
181                os.remove(filename + '.new')
182            except OSError:
183                return report_unable('remove corrupt download')
184
185        try:
186            os.rename(filename, filename + '.old')
187        except (IOError, OSError):
188            return report_unable('move current version')
189        try:
190            os.rename(filename + '.new', filename)
191        except (IOError, OSError):
192            report_unable('overwrite current version')
193            os.rename(filename + '.old', filename)
194            return
195        try:
196            # Continues to run in the background
197            Popen(
198                'ping 127.0.0.1 -n 5 -w 1000 & del /F "%s.old"' % filename,
199                shell=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
200            ydl.to_screen('Updated yt-dlp to version %s' % version_id)
201            return True  # Exit app
202        except OSError:
203            report_unable('delete the old version')
204
205    elif variant in ('zip', 'mac_exe'):
206        pack_type = '3' if variant == 'zip' else '64'
207        try:
208            url = get_bin_info(variant, pack_type).get('browser_download_url')
209            if not url:
210                return report_network_error('fetch updates')
211            urlh = ydl._opener.open(url)
212            newcontent = urlh.read()
213            urlh.close()
214        except (IOError, OSError):
215            return report_network_error('download the latest version')
216
217        expected_sum = get_sha256sum(variant, pack_type)
218        if not expected_sum:
219            ydl.report_warning('no hash information found for the release')
220        elif hashlib.sha256(newcontent).hexdigest() != expected_sum:
221            return report_network_error('verify the new package')
222
223        try:
224            with open(filename, 'wb') as outf:
225                outf.write(newcontent)
226        except (IOError, OSError):
227            return report_unable('overwrite current version')
228
229        ydl.to_screen('Updated yt-dlp to version %s; Restart yt-dlp to use the new version' % version_id)
230        return
231
232    assert False, f'Unhandled variant: {variant}'
233
234
235'''  # UNUSED
236def get_notes(versions, fromVersion):
237    notes = []
238    for v, vdata in sorted(versions.items()):
239        if v > fromVersion:
240            notes.extend(vdata.get('notes', []))
241    return notes
242
243
244def print_notes(to_screen, versions, fromVersion=__version__):
245    notes = get_notes(versions, fromVersion)
246    if notes:
247        to_screen('PLEASE NOTE:')
248        for note in notes:
249            to_screen(note)
250'''
251
252
253# Deprecated
254def update_self(to_screen, verbose, opener):
255
256    printfn = to_screen
257
258    write_string(
259        'DeprecationWarning: "yt_dlp.update.update_self" is deprecated and may be removed in a future version. '
260        'Use "yt_dlp.update.run_update(ydl)" instead\n')
261
262    class FakeYDL():
263        _opener = opener
264        to_screen = printfn
265
266        @staticmethod
267        def report_warning(msg, *args, **kwargs):
268            return printfn('WARNING: %s' % msg, *args, **kwargs)
269
270        @staticmethod
271        def report_error(msg, tb=None):
272            printfn('ERROR: %s' % msg)
273            if not verbose:
274                return
275            if tb is None:
276                # Copied from YoutubeDl.trouble
277                if sys.exc_info()[0]:
278                    tb = ''
279                    if hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]:
280                        tb += ''.join(traceback.format_exception(*sys.exc_info()[1].exc_info))
281                    tb += encode_compat_str(traceback.format_exc())
282                else:
283                    tb_data = traceback.format_list(traceback.extract_stack())
284                    tb = ''.join(tb_data)
285            if tb:
286                printfn(tb)
287
288    return run_update(FakeYDL())
289