Enable the hijacking proxy in the test suite to serve responses

1 files changed, 106 insertions, 0 deletions

diff --git a/test/server.py b/test/server.py
new file mode 100644
index 0000000..d396495
--- /dev/null
+++ b/test/server.py
@@ -0,0 +1,106 @@
+# Copyright (C) 2021 jahoti <jahoti@tilde.team>
+# Licensing information is collated in the `copyright` file
+
+"""
+A modular "virtual network" proxy,
+wrapping the classes in proxy_core.py
+"""
+
+from proxy_core import *
+from urllib.parse import parse_qs
+
+internet = {} # Add info here later
+mime_types = {
+	"7z": "application/x-7z-compressed",	"oga": "audio/ogg",
+	"abw": "application/x-abiword",		"ogv": "video/ogg",
+	"arc": "application/x-freearc",		"ogx": "application/ogg",
+	"bin": "application/octet-stream",	"opus": "audio/opus",
+	"bz": "application/x-bzip",		"otf": "font/otf",
+	"bz2": "application/x-bzip2",		"pdf": "application/pdf",
+	"css": "text/css",			"png": "image/png",
+	"csv": "text/csv",			"sh": "application/x-sh",
+	"gif": "image/gif",			"svg": "image/svg+xml",
+	"gz": "application/gzip",		"tar": "application/x-tar",
+	"htm": "text/html",			"ts": "video/mp2t",
+	"html": "text/html",			"ttf": "font/ttf",
+	"ico": "image/vnd.microsoft.icon",	"txt": "text/plain",
+	"js": "text/javascript",		"wav": "audio/wav",
+	"jpeg": "image/jpeg",			"weba": "audio/webm",
+	"jpg": "image/jpeg",			"webm": "video/webm",
+	"json": "application/json",		"woff": "font/woff",	
+	"mjs": "text/javascript",		"woff2": "font/woff2",
+	"mp3": "audio/mpeg",			"xhtml": "application/xhtml+xml",
+	"mp4": "video/mp4",			"zip": "application/zip",
+	"mpeg": "video/mpeg",
+	"odp": "application/vnd.oasis.opendocument.presentation",
+	"ods": "application/vnd.oasis.opendocument.spreadsheet",
+	"odt": "application/vnd.oasis.opendocument.text",
+	"xml": "application/xml" # text/xml if readable from casual users
+}
+
+class RequestHijacker(ProxyRequestHandler):
+	def handle_request(self, req_body):
+		path_components = self.path.split('?', maxsplit=1)
+		path = path_components[0]
+		try:
+			# Response format: (status_code, headers (dict. of strings),
+			#       body as bytes or filename containing body as string)
+			if path in internet:
+				info = internet[path]
+				if type(info) == tuple:
+					status_code, headers, body_file = info
+					if type(body_file) == str:
+						if 'Content-Type' not in headers and '.' in body_file:
+							ext = body_file.rsplit('.', maxsplit=1)[-1]
+							if ext in mime_types:
+								headers['Content-Type'] = mime_types[ext]
+							
+						with open(body_file, mode='rb') as f:
+							body_file = f.read()
+						
+				else:
+					# A function to evaluate to get the response
+					get_params, post_params = {}, {}
+					if len(path_components) == 2:
+						get_params = parse_qs(path_components[1])
+					
+					# Parse POST parameters; currently only supports
+					# application/x-www-form-urlencoded
+					if req_body:
+						post_params = parse_qs(req_body.encode())
+
+					status_code, headers, body_file = info(self.command, get_params, post_params)
+					if type(body_file) == str:
+						body_file = body_file.encode()
+			
+				if type(status_code) != int or status_code <= 0:
+					raise Exception('Invalid status code %r' % status_code)
+				
+				for header, header_value in headers.items():
+					if type(header) != str:
+						raise Exception('Invalid header key %r' % header)
+					
+					elif type(header_value) != str:
+						raise Exception('Invalid header value %r' % header_value)
+			else:
+				status_code, headers = 404, {'Content-Type': 'text/plain'}
+				body_file = b'Handler for this URL not found.'
+		
+		except Exception as e:
+			status_code, headers, body_file = 500, {'Content-Type': 'text/plain'}, b'Internal Error:\n' + repr(e).encode()
+		
+		headers['Content-Length'] = str(len(body_file))
+		self.send_response(status_code)
+		for header, header_value in headers.items():
+			self.send_header(header, header_value)
+		
+		self.end_headers()
+		self.wfile.write(body_file)
+		
+
+
+def do_an_internet(port=1337):
+	"""Start up the proxy/server"""
+	
+	httpd = ThreadingHTTPServer(('', port), RequestHijacker)
+	httpd.serve_forever()