mirror of
https://github.com/release-engineering/dist-git.git
synced 2025-02-24 23:42:56 +00:00
255 lines
8.4 KiB
Python
255 lines
8.4 KiB
Python
#!/usr/bin/python
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#
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# CGI script to handle file updates for the rpms git repository. There
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# is nothing really complex here other than tedious checking of our
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# every step along the way...
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#
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# License: GPL
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import os
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import sys
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import cgi
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import tempfile
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import grp
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import pwd
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import syslog
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import smtplib
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import fedmsg
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import fedmsg.config
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from ConfigParser import ConfigParser
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from email import Header, Utils
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try:
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from email.mime.text import MIMEText
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except ImportError:
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from email.MIMEText import MIMEText
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import hashlib
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# Reading buffer size
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BUFFER_SIZE = 4096
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# We check modules exist from this dircetory
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GITREPO = '/var/lib/dist-git/git/rpms'
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# Lookaside cache directory
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CACHE_DIR = '/var/lib/dist-git/cache/lookaside/pkgs'
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# Fedora Packager Group
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PACKAGER_GROUP = 'packager'
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# dist git configuration file
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CONFIG_FILE = "/etc/dist-git/dist-git.conf"
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def send_error(text):
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print text
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sys.exit(1)
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def check_form(form, var):
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ret = form.getvalue(var, None)
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if ret is None:
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send_error('Required field "%s" is not present.' % var)
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if isinstance(ret, list):
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send_error('Multiple values given for "%s". Aborting.' % var)
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return ret
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def check_auth(username):
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authenticated = False
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try:
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if username in grp.getgrnam(PACKAGER_GROUP)[3]:
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authenticated = True
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except KeyError:
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pass
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return authenticated
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def send_email(pkg, checksum, filename, username, email_domain, owner_emails):
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text = """A file has been added to the lookaside cache for %(pkg)s:
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%(checksum)s %(filename)s""" % locals()
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msg = MIMEText(text)
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try:
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sender_name = pwd.getpwnam(username)[4]
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sender_email = "{username}@{domain}".format(username=username,
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domain=email_domain)
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except KeyError:
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sender_name = ''
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sender_email = "nobody@{domain}".format(domain=email_domain)
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syslog.syslog('Unable to find account info for %s (uploading %s)' %
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(username, filename))
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if sender_name:
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try:
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sender_name = unicode(sender_name, 'ascii')
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except UnicodeDecodeError:
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sender_name = Header.Header(sender_name, 'utf-8').encode()
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msg.set_charset('utf-8')
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sender = Utils.formataddr((sender_name, sender_email))
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recipients = owner_emails.replace("$PACKAGE", pkg).split(",")
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msg['Subject'] = 'File %s uploaded to lookaside cache by %s' % (
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filename, username)
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msg['From'] = sender
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msg['To'] = ', '.join(recipients)
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msg['X-Fedora-Upload'] = '%s, %s' % (pkg, filename)
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try:
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s = smtplib.SMTP('bastion')
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s.sendmail(sender, recipients, msg.as_string())
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except:
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syslog.syslog('sending mail for upload of %s failed!' % filename)
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def _get_conf(cp, section, option, default):
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if cp.has_section(section) and cp.has_option(section, option):
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return cp.get(section, option)
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return default
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def main():
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config = ConfigParser()
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config.read(CONFIG_FILE)
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EMAIL_DOMAIN = _get_conf(config, "notifications", "email_domain", "")
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PKG_OWNER_EMAILS = _get_conf(config, "notifications", "pkg_owner_emails", "")
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os.umask(002)
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username = os.environ.get('SSL_CLIENT_S_DN_CN', None)
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if not check_auth(username):
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print 'Status: 403 Forbidden'
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print 'Content-type: text/plain'
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print
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print 'You must connect with a valid certificate and be in the %s group to upload.' % PACKAGER_GROUP
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sys.exit(0)
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print 'Content-Type: text/plain'
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print
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assert os.environ['REQUEST_URI'].split('/')[1] == 'repo'
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form = cgi.FieldStorage()
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name = check_form(form, 'name')
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# Search for the file hash, start with stronger hash functions
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if form.has_key('sha512sum'):
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checksum = check_form(form, 'sha512sum')
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hash_type = "sha512"
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elif form.has_key('md5sum'):
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# Fallback on md5, as it's what we currently use
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checksum = check_form(form, 'md5sum')
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hash_type = "md5"
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else:
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send_error('Required checksum is not present.')
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action = None
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upload_file = None
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filename = None
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# Is this a submission or a test?
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# in a test, we don't get a file, just a filename.
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# In a submission, we don;t get a filename, just the file.
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if form.has_key('filename'):
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action = 'check'
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filename = check_form(form, 'filename')
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filename = os.path.basename(filename)
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print >> sys.stderr, '[username=%s] Checking file status: NAME=%s FILENAME=%s %sSUM=%s' % (username, name, filename, hash_type.upper(), checksum)
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else:
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action = 'upload'
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if form.has_key('file'):
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upload_file = form['file']
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if not upload_file.file:
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send_error('No file given for upload. Aborting.')
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filename = os.path.basename(upload_file.filename)
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else:
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send_error('Required field "file" is not present.')
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print >> sys.stderr, '[username=%s] Processing upload request: NAME=%s FILENAME=%s %sSUM=%s' % (username, name, filename, hash_type.upper(), checksum)
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module_dir = os.path.join(CACHE_DIR, name)
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hash_dir = os.path.join(module_dir, filename, hash_type, checksum)
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msgpath = os.path.join(name, module_dir, filename, hash_type, checksum, filename)
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if hash_type == "md5":
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# Preserve compatibility with the current folder hierarchy for md5
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hash_dir = os.path.join(module_dir, filename, checksum)
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msgpath = os.path.join(name, module_dir, filename, checksum, filename)
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unwanted_prefix = '/var/lib/dist-git/cache/lookaside/pkgs/'
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if msgpath.startswith(unwanted_prefix):
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msgpath = msgpath[len(unwanted_prefix):]
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# first test if the module really exists
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git_dir = os.path.join(GITREPO, '%s.git' % name)
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if not os.path.isdir(git_dir):
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print >> sys.stderr, '[username=%s] Unknown module: %s' % (username, name)
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send_error('Module "%s" does not exist!' % name)
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# try to see if we already have this file...
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dest_file = os.path.join(hash_dir, filename)
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if os.path.exists(dest_file):
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if action == 'check':
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print 'Available'
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else:
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upload_file.file.close()
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dest_file_stat = os.stat(dest_file)
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print 'File %s already exists' % filename
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print 'File: %s Size: %d' % (dest_file, dest_file_stat.st_size)
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sys.exit(0)
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elif action == 'check':
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print 'Missing'
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sys.exit(0)
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# check that all directories are in place
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if not os.path.isdir(module_dir):
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os.makedirs(module_dir, 02775)
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# grab a temporary filename and dump our file in there
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tempfile.tempdir = module_dir
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tmpfile = tempfile.mkstemp(checksum)[1]
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tmpfd = open(tmpfile, 'w')
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# now read the whole file in
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m = getattr(hashlib, hash_type)()
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filesize = 0
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while True:
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data = upload_file.file.read(BUFFER_SIZE)
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if not data:
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break
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tmpfd.write(data)
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m.update(data)
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filesize += len(data)
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# now we're done reading, check the checksum of what we got
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tmpfd.close()
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check_checksum = m.hexdigest()
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if checksum != check_checksum:
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os.unlink(tmpfile)
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send_error("%s check failed. Received %s instead of %s." % (hash_type.upper(), check_checksum, checksum))
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# wow, even the checksum matches. make sure full path is valid now
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if not os.path.isdir(hash_dir):
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os.makedirs(hash_dir, 02775)
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print >> sys.stderr, '[username=%s] mkdir %s' % (username, hash_dir)
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os.rename(tmpfile, dest_file)
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os.chmod(dest_file, 0644)
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print >> sys.stderr, '[username=%s] Stored %s (%d bytes)' % (username, dest_file, filesize)
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print 'File %s size %d %s %s stored OK' % (filename, filesize, hash_type.upper(), checksum)
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send_email(name, checksum, filename, username, EMAIL_DOMAIN, PKG_OWNER_EMAILS)
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# Emit a fedmsg message. Load the config to talk to the fedmsg-relay.
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try:
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config = fedmsg.config.load_config([], None)
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config['active'] = True
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config['endpoints']['relay_inbound'] = config['relay_inbound']
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fedmsg.init(name="relay_inbound", cert_prefix="lookaside", **config)
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topic = "lookaside.new"
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msg = dict(name=name, md5sum=checksum, filename=filename.split('/')[-1],
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agent=username, path=msgpath)
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fedmsg.publish(modname="git", topic=topic, msg=msg)
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except Exception as e:
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print "Error with fedmsg", str(e)
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if __name__ == '__main__':
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main()
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