Add data serving scripts

Add histplorer.py, implementing the http query interface
Add unit test
Add server.py as a simple backend dev server
Update documentation

1 files changed, 39 insertions, 0 deletions

diff --git a/backend/server.py b/backend/server.py
new file mode 100755
index 0000000..70e847b
--- /dev/null
+++ b/backend/server.py
@@ -0,0 +1,39 @@
+#!/usr/bin/python3
+
+"""
+Runs a basic dev server that serves a WSGI script and image files
+"""
+
+from typing import Iterable
+import os
+from wsgiref import simple_server, util
+import mimetypes
+from histplorer import application
+
+import argparse
+parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
+parser.parse_args()
+
+def wrappingApp(environ: dict[str, str], start_response) -> Iterable[bytes]:
+	""" WSGI handler that uses 'application', but also serves image files """
+	urlPath = environ['PATH_INFO']
+	if urlPath.startswith('/data/'):
+		# Run WSGI script
+		return application(environ, start_response)
+	elif urlPath.startswith('/hist_data/img/'):
+		# Serve image file
+		imgPath = os.path.join(os.getcwd(), urlPath[1:])
+		if os.path.exists(imgPath):
+			imgType = mimetypes.guess_type(imgPath)[0]
+			start_response('200 OK', [('Content-type', imgType)])
+			return util.FileWrapper(open(imgPath, 'rb'))
+		else:
+			start_response('404 Not Found', [('Content-type', 'text/plain')])
+			return [b'No image found']
+	else:
+		start_response('404 Not Found', [('Content-type', 'text/plain')])
+		return [b'Unrecognised path']
+# Start server
+with simple_server.make_server('', 8000, wrappingApp) as httpd:
+    print('Serving HTTP on port 8000...')
+    httpd.serve_forever()