[pkg] unify client and server into a single python package

We have been discussing about this merge for a while.
Its main goal is to simplify things: code navigation, but also
packaging.

The rationale is that the code is more cohesive in this way, and there's
only one source package to install.

Dependencies that are only for the server or the client will not be
installed by default, and they are expected to be provided by the
environment. There are setuptools extras defined for the client and the
server.

Debianization is still expected to split the single source package into
3 binaries.

Another avantage is that the documentation can now install a single
package with a single step, and therefore include the docstrings into
the generated docs.

- Resolves: #8896

1 files changed, 67 insertions, 0 deletions

diff --git a/src/leap/soledad/server/gzip_middleware.py b/src/leap/soledad/server/gzip_middleware.py
new file mode 100644
index 00000000..c77f9f67
--- /dev/null
+++ b/src/leap/soledad/server/gzip_middleware.py
@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+# gzip_middleware.py
+# Copyright (C) 2013 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+Gzip middleware for WSGI apps.
+"""
+from six import StringIO
+from gzip import GzipFile
+
+
+class GzipMiddleware(object):
+    """
+    GzipMiddleware class for WSGI.
+    """
+    def __init__(self, app, compresslevel=9):
+        self.app = app
+        self.compresslevel = compresslevel
+
+    def __call__(self, environ, start_response):
+        if 'gzip' not in environ.get('HTTP_ACCEPT_ENCODING', ''):
+            return self.app(environ, start_response)
+
+        buffer = StringIO.StringIO()
+        output = GzipFile(
+            mode='wb',
+            compresslevel=self.compresslevel,
+            fileobj=buffer
+        )
+
+        start_response_args = []
+
+        def dummy_start_response(status, headers, exc_info=None):
+            start_response_args.append(status)
+            start_response_args.append(headers)
+            start_response_args.append(exc_info)
+            return output.write
+
+        app_iter = self.app(environ, dummy_start_response)
+        for line in app_iter:
+            output.write(line)
+        if hasattr(app_iter, 'close'):
+            app_iter.close()
+        output.close()
+        buffer.seek(0)
+        result = buffer.getvalue()
+        headers = []
+        for name, value in start_response_args[1]:
+            if name.lower() != 'content-length':
+                headers.append((name, value))
+        headers.append(('Content-Length', str(len(result))))
+        headers.append(('Content-Encoding', 'gzip'))
+        start_response(start_response_args[0], headers, start_response_args[2])
+        buffer.close()
+        return [result]