From a0700df668b5169c3b63742730ce22f9b03f5cb1 Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@libreserver.org>
Date: Sun, 26 Jun 2022 23:27:42 +0100
Subject: [PATCH] Show activitypub protocol images

---
 daemon.py | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/daemon.py b/daemon.py
index d07691d3c..42df0f2e7 100644
--- a/daemon.py
+++ b/daemon.py
@@ -8233,6 +8233,56 @@ class PubServer(BaseHTTPRequestHandler):
                 return
         self._404()
 
+    def _show_specification_image(self, path: str,
+                                  base_dir: str, getreq_start_time) -> None:
+        """Shows an image within the ActivityPub specification document
+        """
+        image_filename = path.split('/', 1)[1]
+        if '/' in image_filename:
+            self._404()
+            return
+        media_filename = \
+            base_dir + '/specification/' + image_filename
+        if self._etag_exists(media_filename):
+            # The file has not changed
+            self._304()
+            return
+        if self.server.iconsCache.get(media_filename):
+            media_binary = self.server.iconsCache[media_filename]
+            mime_type_str = media_file_mime_type(media_filename)
+            self._set_headers_etag(media_filename,
+                                   mime_type_str,
+                                   media_binary, None,
+                                   self.server.domain_full,
+                                   False, None)
+            self._write(media_binary)
+            fitness_performance(getreq_start_time, self.server.fitness,
+                                '_GET', '_show_specification_image',
+                                self.server.debug)
+            return
+        if os.path.isfile(media_filename):
+            media_binary = None
+            try:
+                with open(media_filename, 'rb') as av_file:
+                    media_binary = av_file.read()
+            except OSError:
+                print('EX: unable to read specification image ' +
+                      media_filename)
+            if media_binary:
+                mime_type = media_file_mime_type(media_filename)
+                self._set_headers_etag(media_filename,
+                                       mime_type,
+                                       media_binary, None,
+                                       self.server.domain_full,
+                                       False, None)
+                self._write(media_binary)
+                self.server.iconsCache[media_filename] = media_binary
+            fitness_performance(getreq_start_time, self.server.fitness,
+                                '_GET', '_show_specification_image',
+                                self.server.debug)
+            return
+        self._404()
+
     def _show_help_screen_image(self, calling_domain: str, path: str,
                                 base_dir: str, getreq_start_time) -> None:
         """Shows a help screen image
@@ -16737,6 +16787,14 @@ class PubServer(BaseHTTPRequestHandler):
                             self.server.base_dir, getreq_start_time)
             return
 
+        # show images within https://instancedomain/activitypub
+        if self.path.startswith('/activitypub-tutorial-'):
+            if self.path.endswith('.png'):
+                self._show_specification_image(self.path,
+                                               self.server.base_dir,
+                                               getreq_start_time)
+                return
+
         # help screen images
         # Note that this comes before the busy flag to avoid conflicts
         if self.path.startswith('/helpimages/'):