Support index pages in static folder

Author: jtc42

examples/simple_extensions.py

@@ -168,7 +168,6 @@ def get(self):
 # Create LabThings Flask app
 app, labthing = create_app(
     __name__,
-    prefix="/api",
     title="My Lab Device API",
     description="Test LabThing-based API",
     version="0.1.0",

examples/static/index.html

@@ -0,0 +1 @@
+<h1>Hello world</h1>

examples/static/subfolder/index.html

@@ -0,0 +1 @@
+<h1>Hello subfolder</h1>

src/labthings/server/extensions.py

@@ -54,6 +54,9 @@ def __init__(
         self.add_view(
             self.static_view_class, f"{static_url_path}/<path:path>", endpoint="static"
         )
+        self.add_view(
+            self.static_view_class, f"{static_url_path}", endpoint="static_root"
+        )
 
     @property
     def views(self):

src/labthings/server/view/builder.py

@@ -7,7 +7,9 @@
 from . import View, ActionView, PropertyView
 from ..spec.utilities import compile_view_spec
 
-from flask import send_from_directory
+import os
+import glob
+from flask import send_file, abort
 import uuid
 
 
@@ -124,8 +126,19 @@ def static_from(static_folder: str, name=None):
         name = f"static-{uid}"
 
     # Create inner functions
-    def _get(self, path):
-        return send_from_directory(static_folder, path)
+    def _get(self, path=""):
+        full_path = os.path.join(static_folder, path)
+        if not os.path.exists(full_path):
+            return abort(404)
+
+        if os.path.isfile(full_path):
+            return send_file(full_path)
+
+        if os.path.isdir(full_path):
+            indexes = glob.glob(os.path.join(full_path, "index.*"))
+            if not indexes:
+                return abort(404)
+            return send_file(indexes[0])
 
     # Generate a basic property class
     generated_class = type(name, (View, object), {"get": _get})