FTP mirror script，ftpmirrorscript,'''PYTHON SO

FTP mirror script，ftpmirrorscript,'''PYTHON SO

'''PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2--------------------------------------------1. This LICENSE AGREEMENT is between the Python Software Foundation('PSF'), and the Individual or Organization ('Licensee') accessing andotherwise using this software ('Python') in source or binary form andits associated documentation.2. Subject to the terms and conditions of this License Agreement, PSFhereby grants Licensee a nonexclusive, royalty-free, world-widelicense to reproduce, analyze, test, perform and/or display publicly,prepare derivative works, distribute, and otherwise use Pythonalone or in any derivative version, provided, however, that PSF'sLicense Agreement and PSF's notice of copyright, i.e., 'Copyright (c)2001, 2002, 2003, 2004 Python Software Foundation; All Rights Reserved'are retained in Python alone or in any derivative version preparedby Licensee.3. In the event Licensee prepares a derivative work that is based onor incorporates Python or any part thereof, and wants to makethe derivative work available to others as provided herein, thenLicensee hereby agrees to include in any such work a brief summary ofthe changes made to Python.4. PSF is making Python available to Licensee on an 'AS IS'basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS ORIMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO ANDDISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESSFOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOTINFRINGE ANY THIRD PARTY RIGHTS.5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHONFOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS ASA RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.6. This License Agreement will automatically terminate upon a materialbreach of its terms and conditions.7. Nothing in this License Agreement shall be deemed to create anyrelationship of agency, partnership, or joint venture between PSF andLicensee.  This License Agreement does not grant permission to use PSFtrademarks or trade name in a trademark sense to endorse or promoteproducts or services of Licensee, or any third party.8. By copying, installing or otherwise using Python, Licenseeagrees to be bound by the terms and conditions of this LicenseAgreement.'''#! /usr/bin/env python'''Mirror a remote ftp subtree into a local directory tree.usage: ftpmirror [-v] [-q] [-i] [-m] [-n] [-r] [-s pat]                 [-l username [-p passwd [-a account]]]                 hostname[:port] [remotedir [localdir]]-v: verbose-q: quiet-i: interactive mode-m: macintosh server (NCSA telnet 2.4) (implies -n -s '*.o')-n: don't log in-r: remove local files/directories no longer pertinent-l username [-p passwd [-a account]]: login info (default .netrc or anonymous)-s pat: skip files matching patternhostname: remote host w/ optional port separated by ':'remotedir: remote directory (default initial)localdir: local directory (default current)'''import osimport sysimport timeimport getoptimport ftplibimport netrcfrom fnmatch import fnmatch# Print usage message and exitdef usage(*args):    sys.stdout = sys.stderr    for msg in args: print msg    print __doc__    sys.exit(2)verbose = 1 # 0 for -q, 2 for -vinteractive = 0mac = 0rmok = 0nologin = 0skippats = ['.', '..', '.mirrorinfo']# Main program: parse command line and start processingdef main():    global verbose, interactive, mac, rmok, nologin    try:        opts, args = getopt.getopt(sys.argv[1:], 'a:bil:mnp:qrs:v')    except getopt.error, msg:        usage(msg)    login = ''    passwd = ''    account = ''    if not args: usage('hostname missing')    host = args[0]    port = 0    if ':' in host:        host, port = host.split(':', 1)        port = int(port)    try:        auth = netrc.netrc().authenticators(host)        if auth is not None:            login, account, passwd = auth    except (netrc.NetrcParseError, IOError):        pass    for o, a in opts:        if o == '-l': login = a        if o == '-p': passwd = a        if o == '-a': account = a        if o == '-v': verbose = verbose + 1        if o == '-q': verbose = 0        if o == '-i': interactive = 1        if o == '-m': mac = 1; nologin = 1; skippats.append('*.o')        if o == '-n': nologin = 1        if o == '-r': rmok = 1        if o == '-s': skippats.append(a)    remotedir = ''    localdir = ''    if args[1:]:        remotedir = args[1]        if args[2:]:            localdir = args[2]            if args[3:]: usage('too many arguments')    #    f = ftplib.FTP()    if verbose: print 'Connecting to '%s%s'...' % (host,                                                   (port and ':%d'%port or ''))    f.connect(host,port)    if not nologin:        if verbose:            print 'Logging in as %r...' % (login or 'anonymous')        f.login(login, passwd, account)    if verbose: print 'OK.'    pwd = f.pwd()    if verbose > 1: print 'PWD =', repr(pwd)    if remotedir:        if verbose > 1: print 'cwd(%s)' % repr(remotedir)        f.cwd(remotedir)        if verbose > 1: print 'OK.'        pwd = f.pwd()        if verbose > 1: print 'PWD =', repr(pwd)    #    mirrorsubdir(f, localdir)# Core logic: mirror one subdirectory (recursively)def mirrorsubdir(f, localdir):    pwd = f.pwd()    if localdir and not os.path.isdir(localdir):        if verbose: print 'Creating local directory', repr(localdir)        try:            makedir(localdir)        except os.error, msg:            print 'Failed to establish local directory', repr(localdir)            return    infofilename = os.path.join(localdir, '.mirrorinfo')    try:        text = open(infofilename, 'r').read()    except IOError, msg:        text = '{}'    try:        info = eval(text)    except (SyntaxError, NameError):        print 'Bad mirror info in', repr(infofilename)        info = {}    subdirs = []    listing = []    if verbose: print 'Listing remote directory %r...' % (pwd,)    f.retrlines('LIST', listing.append)    filesfound = []    for line in listing:        if verbose > 1: print '-->', repr(line)        if mac:            # Mac listing has just filenames;            # trailing / means subdirectory            filename = line.strip()            mode = '-'            if filename[-1:] == '/':                filename = filename[:-1]                mode = 'd'            infostuff = ''        else:            # Parse, assuming a UNIX listing            words = line.split(None, 8)            if len(words) < 6:                if verbose > 1: print 'Skipping short line'                continue            filename = words[-1].lstrip()            i = filename.find(' -> ')            if i >= 0:                # words[0] had better start with 'l'...                if verbose > 1:                    print 'Found symbolic link %r' % (filename,)                linkto = filename[i+4:]                filename = filename[:i]            infostuff = words[-5:-1]            mode = words[0]        skip = 0        for pat in skippats:            if fnmatch(filename, pat):                if verbose > 1:                    print 'Skip pattern', repr(pat),                    print 'matches', repr(filename)                skip = 1                break        if skip:            continue        if mode[0] == 'd':            if verbose > 1:                print 'Remembering subdirectory', repr(filename)            subdirs.append(filename)            continue        filesfound.append(filename)        if info.has_key(filename) and info[filename] == infostuff:            if verbose > 1:                print 'Already have this version of',repr(filename)            continue        fullname = os.path.join(localdir, filename)        tempname = os.path.join(localdir, '@'+filename)        if interactive:            doit = askabout('file', filename, pwd)            if not doit:                if not info.has_key(filename):                    info[filename] = 'Not retrieved'                continue        try:            os.unlink(tempname)        except os.error:            pass        if mode[0] == 'l':            if verbose:                print 'Creating symlink %r -> %r' % (filename, linkto)            try:                os.symlink(linkto, tempname)            except IOError, msg:                print 'Can't create %r: %s' % (tempname, msg)                continue        else:            try:                fp = open(tempname, 'wb')            except IOError, msg:                print 'Can't create %r: %s' % (tempname, msg)                continue            if verbose:                print 'Retrieving %r from %r as %r...' % (filename, pwd, fullname)            if verbose:                fp1 = LoggingFile(fp, 1024, sys.stdout)            else:                fp1 = fp            t0 = time.time()            try:                f.retrbinary('RETR ' + filename,                             fp1.write, 8*1024)            except ftplib.error_perm, msg:                print msg            t1 = time.time()            bytes = fp.tell()            fp.close()            if fp1 != fp:                fp1.close()        try:            os.unlink(fullname)        except os.error:            pass            # Ignore the error        try:            os.rename(tempname, fullname)        except os.error, msg:            print 'Can't rename %r to %r: %s' % (tempname, fullname, msg)            continue        info[filename] = infostuff        writedict(info, infofilename)        if verbose and mode[0] != 'l':            dt = t1 - t0            kbytes = bytes / 1024.0            print int(round(kbytes)),            print 'Kbytes in',            print int(round(dt)),            print 'seconds',            if t1 > t0:                print '(~%d Kbytes/sec)' % \                          int(round(kbytes/dt),)            print    #    # Remove files from info that are no longer remote    deletions = 0    for filename in info.keys():        if filename not in filesfound:            if verbose:                print 'Removing obsolete info entry for',                print repr(filename), 'in', repr(localdir or '.')            del info[filename]            deletions = deletions + 1    if deletions:        writedict(info, infofilename)    #    # Remove local files that are no longer in the remote directory    try:        if not localdir: names = os.listdir(os.curdir)        else: names = os.listdir(localdir)    except os.error:        names = []    for name in names:        if name[0] == '.' or info.has_key(name) or name in subdirs:            continue        skip = 0        for pat in skippats:            if fnmatch(name, pat):                if verbose > 1:                    print 'Skip pattern', repr(pat),                    print 'matches', repr(name)                skip = 1                break        if skip:            continue        fullname = os.path.join(localdir, name)        if not rmok:            if verbose:                print 'Local file', repr(fullname),                print 'is no longer pertinent'            continue        if verbose: print 'Removing local file/dir', repr(fullname)        remove(fullname)    #    # Recursively mirror subdirectories    for subdir in subdirs:        if interactive:            doit = askabout('subdirectory', subdir, pwd)            if not doit: continue        if verbose: print 'Processing subdirectory', repr(subdir)        localsubdir = os.path.join(localdir, subdir)        pwd = f.pwd()        if verbose > 1:            print 'Remote directory now:', repr(pwd)            print 'Remote cwd', repr(subdir)        try:            f.cwd(subdir)        except ftplib.error_perm, msg:            print 'Can't chdir to', repr(subdir), ':', repr(msg)        else:            if verbose: print 'Mirroring as', repr(localsubdir)            mirrorsubdir(f, localsubdir)            if verbose > 1: print 'Remote cwd ..'            f.cwd('..')        newpwd = f.pwd()        if newpwd != pwd:            print 'Ended up in wrong directory after cd + cd ..'            print 'Giving up now.'            break        else:            if verbose > 1: print 'OK.'# Helper to remove a file or directory treedef remove(fullname):    if os.path.isdir(fullname) and not os.path.islink(fullname):        try:            names = os.listdir(fullname)        except os.error:            names = []        ok = 1        for name in names:            if not remove(os.path.join(fullname, name)):                ok = 0        if not ok:            return 0        try:            os.rmdir(fullname)        except os.error, msg:            print 'Can't remove local directory %r: %s' % (fullname, msg)            return 0    else:        try:            os.unlink(fullname)        except os.error, msg:            print 'Can't remove local file %r: %s' % (fullname, msg)            return 0    return 1# Wrapper around a file for writing to write a hash sign every block.class LoggingFile:    def __init__(self, fp, blocksize, outfp):        self.fp = fp        self.bytes = 0        self.hashes = 0        self.blocksize = blocksize        self.outfp = outfp    def write(self, data):        self.bytes = self.bytes + len(data)        hashes = int(self.bytes) / self.blocksize        while hashes > self.hashes:            self.outfp.write('#')            self.outfp.flush()            self.hashes = self.hashes + 1        self.fp.write(data)    def close(self):        self.outfp.write('\n')# Ask permission to download a file.def askabout(filetype, filename, pwd):    prompt = 'Retrieve %s %s from %s ? [ny] ' % (filetype, filename, pwd)    while 1:        reply = raw_input(prompt).strip().lower()        if reply in ['y', 'ye', 'yes']:            return 1        if reply in ['', 'n', 'no', 'nop', 'nope']:            return 0        print 'Please answer yes or no.'# Create a directory if it doesn't exist.  Recursively create the# parent directory as well if needed.def makedir(pathname):    if os.path.isdir(pathname):        return    dirname = os.path.dirname(pathname)    if dirname: makedir(dirname)    os.mkdir(pathname, 0777)# Write a dictionary to a file in a way that can be read back using# rval() but is still somewhat readable (i.e. not a single long line).# Also creates a backup file.def writedict(dict, filename):    dir, fname = os.path.split(filename)    tempname = os.path.join(dir, '@' + fname)    backup = os.path.join(dir, fname + '~')    try:        os.unlink(backup)    except os.error:        pass    fp = open(tempname, 'w')    fp.write('{\n')    for key, value in dict.items():        fp.write('%r: %r,\n' % (key, value))    fp.write('}\n')    fp.close()    try:        os.rename(filename, backup)    except os.error:        pass    os.rename(tempname, filename)if __name__ == '__main__':    main()