示例#1
0
 def stringHash(self):
     h = HashVal()
     h.hashString(repr(self))
     return h.asHex()
示例#2
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    def __determineHostDir(self, hostDirBasename, hostUrl):
        """ Hashes the host URL into a (mostly) unique directory
        string, which will be the root of the host's install tree.
        Returns the resulting path, as a Filename.

        This code is duplicated in C++, in
        P3DHost::determine_host_dir(). """

        if hostDirBasename:
            # If the contents.xml specified a host_dir parameter, use
            # it.
            hostDir = str(self.rootDir) + '/hosts'
            for component in hostDirBasename.split('/'):
                if component:
                    if component[0] == '.':
                        # Forbid ".foo" or "..".
                        component = 'x' + component
                    hostDir += '/'
                    hostDir += component
            return Filename(hostDir)

        hostDir = 'hosts/'

        # Look for a server name in the URL.  Including this string in the
        # directory name makes it friendlier for people browsing the
        # directory.

        # We could use URLSpec, but we do it by hand instead, to make
        # it more likely that our hash code will exactly match the
        # similar logic in P3DHost.
        p = hostUrl.find('://')
        hostname = ''
        if p != -1:
            start = p + 3
            end = hostUrl.find('/', start)
            # Now start .. end is something like "username@host:port".

            at = hostUrl.find('@', start)
            if at != -1 and at < end:
                start = at + 1

            colon = hostUrl.find(':', start)
            if colon != -1 and colon < end:
                end = colon

            # Now start .. end is just the hostname.
            hostname = hostUrl[start : end]

        # Now build a hash string of the whole URL.  We'll use MD5 to
        # get a pretty good hash, with a minimum chance of collision.
        # Even if there is a hash collision, though, it's not the end
        # of the world; it just means that both hosts will dump their
        # packages into the same directory, and they'll fight over the
        # toplevel contents.xml file.  Assuming they use different
        # version numbers (which should be safe since they have the
        # same hostname), there will be minimal redownloading.

        hashSize = 16
        keepHash = hashSize
        if hostname:
            hostDir += hostname + '_'

            # If we successfully got a hostname, we don't really need the
            # full hash.  We'll keep half of it.
            keepHash = keepHash // 2

        md = HashVal()
        md.hashString(hostUrl)
        hostDir += md.asHex()[:keepHash * 2]

        hostDir = Filename(self.rootDir, hostDir)
        return hostDir
示例#3
0
    def readHash(self, pathname):
        """ Reads the hash only from the indicated pathname. """

        hv = HashVal()
        hv.hashFile(pathname)
        self.hash = hv.asHex()
示例#4
0
    def __determineHostDir(self, hostDirBasename, hostUrl):
        """ Hashes the host URL into a (mostly) unique directory
        string, which will be the root of the host's install tree.
        Returns the resulting path, as a Filename.

        This code is duplicated in C++, in
        P3DHost::determine_host_dir(). """

        if hostDirBasename:
            # If the contents.xml specified a host_dir parameter, use
            # it.
            hostDir = str(self.rootDir) + '/hosts'
            for component in hostDirBasename.split('/'):
                if component:
                    if component[0] == '.':
                        # Forbid ".foo" or "..".
                        component = 'x' + component
                    hostDir += '/'
                    hostDir += component
            return Filename(hostDir)

        hostDir = 'hosts/'

        # Look for a server name in the URL.  Including this string in the
        # directory name makes it friendlier for people browsing the
        # directory.

        # We could use URLSpec, but we do it by hand instead, to make
        # it more likely that our hash code will exactly match the
        # similar logic in P3DHost.
        p = hostUrl.find('://')
        hostname = ''
        if p != -1:
            start = p + 3
            end = hostUrl.find('/', start)
            # Now start .. end is something like "username@host:port".

            at = hostUrl.find('@', start)
            if at != -1 and at < end:
                start = at + 1

            colon = hostUrl.find(':', start)
            if colon != -1 and colon < end:
                end = colon

            # Now start .. end is just the hostname.
            hostname = hostUrl[start:end]

        # Now build a hash string of the whole URL.  We'll use MD5 to
        # get a pretty good hash, with a minimum chance of collision.
        # Even if there is a hash collision, though, it's not the end
        # of the world; it just means that both hosts will dump their
        # packages into the same directory, and they'll fight over the
        # toplevel contents.xml file.  Assuming they use different
        # version numbers (which should be safe since they have the
        # same hostname), there will be minimal redownloading.

        hashSize = 16
        keepHash = hashSize
        if hostname:
            hostDir += hostname + '_'

            # If we successfully got a hostname, we don't really need the
            # full hash.  We'll keep half of it.
            keepHash = keepHash // 2

        md = HashVal()
        md.hashString(hostUrl)
        hostDir += md.asHex()[:keepHash * 2]

        hostDir = Filename(self.rootDir, hostDir)
        return hostDir
示例#5
0
    def readHash(self, pathname):
        """ Reads the hash only from the indicated pathname. """

        hv = HashVal()
        hv.hashFile(pathname)
        self.hash = hv.asHex()