Mitra Fixes (#207)

Don't send a list when populating Accept header. This seems to work fine on Mastodon and friends, and fixes a bug with the Mitra server until resolved upstream.

core/html.py

@@ -20,7 +20,7 @@ def sanitize_post(post_html: str) -> str:
     Only allows a, br, p and span tags, and class attributes.
     """
     cleaner = bleach.Cleaner(
-        tags=["br", "p"],
+        tags=["br", "p", "a"],
         attributes={  # type:ignore
             "a": allow_a,
             "p": ["class"],

core/signatures.py

@@ -200,7 +200,7 @@ class HttpSignature:
             body_bytes = b""
         # GET requests get implicit accept headers added
         if method == "get":
-            headers["Accept"] = "application/activity+json, application/ld+json"
+            headers["Accept"] = "application/activity+json"
         # Sign the headers
         signed_string = "\n".join(
             f"{name.lower()}: {value}" for name, value in headers.items()

docker/Dockerfile

@@ -3,6 +3,8 @@ ARG IMAGE_LABEL=3.11.1-slim-buster
 
 FROM ${IMAGE_HOST}:${IMAGE_LABEL}
 
+ENV PYTHONUNBUFFERED=1
+
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
         libpq5 \