first commit

backend/venv/lib/python3.9/site-packages/docker/utils/proxy.py

@@ -0,0 +1,77 @@
+from .utils import format_environment
+
+
+class ProxyConfig(dict):
+    '''
+    Hold the client's proxy configuration
+    '''
+    @property
+    def http(self):
+        return self.get('http')
+
+    @property
+    def https(self):
+        return self.get('https')
+
+    @property
+    def ftp(self):
+        return self.get('ftp')
+
+    @property
+    def no_proxy(self):
+        return self.get('no_proxy')
+
+    @staticmethod
+    def from_dict(config):
+        '''
+        Instantiate a new ProxyConfig from a dictionary that represents a
+        client configuration, as described in `the documentation`_.
+
+        .. _the documentation:
+            https://docs.docker.com/network/proxy/#configure-the-docker-client
+        '''
+        return ProxyConfig(
+            http=config.get('httpProxy'),
+            https=config.get('httpsProxy'),
+            ftp=config.get('ftpProxy'),
+            no_proxy=config.get('noProxy'),
+        )
+
+    def get_environment(self):
+        '''
+        Return a dictionary representing the environment variables used to
+        set the proxy settings.
+        '''
+        env = {}
+        if self.http:
+            env['http_proxy'] = env['HTTP_PROXY'] = self.http
+        if self.https:
+            env['https_proxy'] = env['HTTPS_PROXY'] = self.https
+        if self.ftp:
+            env['ftp_proxy'] = env['FTP_PROXY'] = self.ftp
+        if self.no_proxy:
+            env['no_proxy'] = env['NO_PROXY'] = self.no_proxy
+        return env
+
+    def inject_proxy_environment(self, environment):
+        '''
+        Given a list of strings representing environment variables, prepend the
+        environment variables corresponding to the proxy settings.
+        '''
+        if not self:
+            return environment
+
+        proxy_env = format_environment(self.get_environment())
+        if not environment:
+            return proxy_env
+        # It is important to prepend our variables, because we want the
+        # variables defined in "environment" to take precedence.
+        return proxy_env + environment
+
+    def __str__(self):
+        return (
+            'ProxyConfig('
+            f'http={self.http}, https={self.https}, '
+            f'ftp={self.ftp}, no_proxy={self.no_proxy}'
+            ')'
+        )