def __init__(self, host, port, username = "", password = ""):
"""
"""
if not Validator.validate_non_empty_string(host):
raise InvalidParameterError("host", "Must be non-empty String")
if not Validator.validate_integer(port):
raise InvalidParameterError("port", "Must be an integer value")
if not Validator.validate_string(username):
raise InvalidParameterError("username", "Must be a string value")
if not Validator.validate_string(password):
raise InvalidParameterError("password", "Must be a string value")
super(SqlClient, self).__init__()
self.__host = host
self.__port = port
self.__username = username
self.__password = password
self.__platform = Platform.get_current()
def download(cls, url, destination, replace = False, retry = 1):
"""
downloads a file from the web
@param url: the url of the file to be downloaded
@param destination: the destination where the file will be downloaded to
@param replace: if set True then the downloaded file will replae any existinf file
@param retry: number of retries
@rtype: bool
@return: True on success
@raise FileDownloadError: if error during downloading
"""
if not Validator.validate(url, "url"):
raise InvalidParameterError("url", "should be a non-empty string starts with 'http://'")
if not Validator.validate(destination, "non_empty_string"):
raise InvalidParameterError('destination', 'should be non-empty string')
if not Validator.validate(replace, 'boolean'):
raise InvalidParameterError('replace', 'should be a boolean value')
if not Validator.validate(retry, 'integer'):
raise InvalidParameterError('getting', 'should be an integer value')
separator = Platform.get_current().get_separator()
if not (re.match(r'/', destination) or re.match(r'[a-zA-Z]:\\', destination)):
destination = destination.rstrip(separator)
while retry:
retry -= 1
try:
result = urllib2.urlopen(url, "")
if os.path.exists(destination):
if os.path.isdir(destination):
if result.headers.has_key('content-disposition'):
tmp = result.headers.dict['content-disposition']
index = tmp.find('filename=')
if index == -1:
name = 'attachment'
else:
name = tmp[index+9: ]
name = name.split(' ')[0]
else:
name = result.geturl()
name = name.split('?')[0]
name = name.rstrip('/')
index = name.rfind('/')
name = name[index+1:]
destination = destination + separator + name
else:
if os.path.isfile(destination):
if replace:
os.remove(destination)
else:
raise FileExistsError, 'the destination file already exists'
else:
raise FileExistsError, 'destination is non-file, system cannot replace a non file'
file = open(destination, "wb")
buffer = result.read(4096)
while len(buffer) != 0:
file.write(buffer)
buffer = result.read(4096)
file.close()
except Exception, e:
if retry == 0:
raise FileDownloadError, str(e)
else:
break
def __init__(self, root = ""): platform = Platform.get_current() super(LocalClient, self).__init__(platform, root)
