#!/usr/bin/python # # CGI script to handle file updates for the rpms git repository. There # is nothing really complex here other than tedious checking of our # every step along the way... # # License: GPL import os import sys import cgi import tempfile import grp import pwd import syslog import smtplib import fedmsg import fedmsg.config from email import Header, Utils try: from email.mime.text import MIMEText except ImportError: from email.MIMEText import MIMEText try: import hashlib md5_constructor = hashlib.md5 except ImportError: import md5 md5_constructor = md5.new # Reading buffer size BUFFER_SIZE = 4096 # We check modules exist from this dircetory GITREPO = '/srv/git/rpms' # Lookaside cache directory CACHE_DIR = '/srv/cache/lookaside/pkgs' # Fedora Packager Group PACKAGER_GROUP = 'packager' def send_error(text): print text sys.exit(1) def check_form(form, var): ret = form.getvalue(var, None) if ret is None: send_error('Required field "%s" is not present.' % var) if isinstance(ret, list): send_error('Multiple values given for "%s". Aborting.' % var) return ret def check_auth(username): authenticated = False try: if username in grp.getgrnam(PACKAGER_GROUP)[3]: authenticated = True except KeyError: pass return authenticated def send_email(pkg, md5, filename, username): text = """A file has been added to the lookaside cache for %(pkg)s: %(md5)s %(filename)s""" % locals() msg = MIMEText(text) try: sender_name = pwd.getpwnam(username)[4] sender_email = '%s@fedoraproject.org' % username except KeyError: sender_name = '' sender_email = 'nobody@fedoraproject.org' syslog.syslog('Unable to find account info for %s (uploading %s)' % (username, filename)) if sender_name: try: sender_name = unicode(sender_name, 'ascii') except UnicodeDecodeError: sender_name = Header.Header(sender_name, 'utf-8').encode() msg.set_charset('utf-8') sender = Utils.formataddr((sender_name, sender_email)) recipients = ['%s-owner@fedoraproject.org' % pkg, 'scm-commits@lists.fedoraproject.org'] msg['Subject'] = 'File %s uploaded to lookaside cache by %s' % ( filename, username) msg['From'] = sender msg['To'] = ', '.join(recipients) msg['X-Fedora-Upload'] = '%s, %s' % (pkg, filename) try: s = smtplib.SMTP('bastion') s.sendmail(sender, recipients, msg.as_string()) except: syslog.syslog('sending mail for upload of %s failed!' % filename) def main(): os.umask(002) username = os.environ.get('SSL_CLIENT_S_DN_CN', None) if not check_auth(username): print 'Status: 403 Forbidden' print 'Content-type: text/plain' print print 'You must connect with a valid certificate and be in the %s group to upload.' % PACKAGER_GROUP sys.exit(0) print 'Content-Type: text/plain' print assert os.environ['REQUEST_URI'].split('/')[1] == 'repo' form = cgi.FieldStorage() name = check_form(form, 'name') md5sum = check_form(form, 'md5sum') action = None upload_file = None filename = None # Is this a submission or a test? # in a test, we don't get a file, just a filename. # In a submission, we don;t get a filename, just the file. if form.has_key('filename'): action = 'check' filename = check_form(form, 'filename') filename = os.path.basename(filename) print >> sys.stderr, '[username=%s] Checking file status: NAME=%s FILENAME=%s MD5SUM=%s' % (username, name, filename, md5sum) else: action = 'upload' if form.has_key('file'): upload_file = form['file'] if not upload_file.file: send_error('No file given for upload. Aborting.') filename = os.path.basename(upload_file.filename) else: send_error('Required field "file" is not present.') print >> sys.stderr, '[username=%s] Processing upload request: NAME=%s FILENAME=%s MD5SUM=%s' % (username, name, filename, md5sum) module_dir = os.path.join(CACHE_DIR, name) md5_dir = os.path.join(module_dir, filename, md5sum) # first test if the module really exists git_dir = os.path.join(GITREPO, '%s.git' % name) if not os.path.isdir(git_dir): print >> sys.stderr, '[username=%s] Unknown module: %s' % (username, name) send_error('Module "%s" does not exist!' % name) # try to see if we already have this file... dest_file = os.path.join(md5_dir, filename) if os.path.exists(dest_file): if action == 'check': print 'Available' else: upload_file.file.close() dest_file_stat = os.stat(dest_file) print 'File %s already exists' % filename print 'File: %s Size: %d' % (dest_file, dest_file_stat.st_size) sys.exit(0) elif action == 'check': print 'Missing' sys.exit(0) # check that all directories are in place if not os.path.isdir(module_dir): os.makedirs(module_dir, 02775) # grab a temporary filename and dump our file in there tempfile.tempdir = module_dir tmpfile = tempfile.mkstemp(md5sum)[1] tmpfd = open(tmpfile, 'w') # now read the whole file in m = md5_constructor() filesize = 0 while True: data = upload_file.file.read(BUFFER_SIZE) if not data: break tmpfd.write(data) m.update(data) filesize += len(data) # now we're done reading, check the MD5 sum of what we got tmpfd.close() check_md5sum = m.hexdigest() if md5sum != check_md5sum: send_error("MD5 check failed. Received %s instead of %s." % (check_md5sum, md5sum)) # wow, even the MD5SUM matches. make sure full path is valid now if not os.path.isdir(md5_dir): os.makedirs(md5_dir, 02775) print >> sys.stderr, '[username=%s] mkdir %s' % (username, md5_dir) os.rename(tmpfile, dest_file) os.chmod(dest_file, 0644) print >> sys.stderr, '[username=%s] Stored %s (%d bytes)' % (username, dest_file, filesize) print 'File %s size %d MD5 %s stored OK' % (filename, filesize, md5sum) send_email(name, md5sum, filename, username) # Emit a fedmsg message. Load the config to talk to the fedmsg-relay. try: config = fedmsg.config.load_config([], None) config['active'] = True config['endpoints']['relay_inbound'] = config['relay_inbound'] fedmsg.init(name="relay_inbound", cert_prefix="lookaside", **config) topic = "lookaside.new" msg = dict(name=name, md5sum=md5sum, filename=filename, agent=username) fedmsg.publish(modname="git", topic=topic, msg=msg) except Exception as e: print "Error with fedmsg", str(e) if __name__ == '__main__': main()