# HG changeset patch
# User Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
# Date 1527883546 -7200
# Node ID 1cff081abbedc20df817b861b6f1bf8b576e92fc
# Parent  e0ef90e9693149cc56ecaaaff5136c891623ba89
mod_http_avatar: Add a module to serve vCard-temp avatars over HTTP.

diff -r e0ef90e96931 -r 1cff081abbed mod_http_avatar/README.markdown
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_http_avatar/README.markdown	Fri Jun 01 22:05:46 2018 +0200
@@ -0,0 +1,28 @@
+---
+summary: Serve avatars from HTTP
+...
+
+Introduction
+============
+
+This module serves avatars from local users who have one set in their
+vCard, see XEP-0054 and XEP-0153.
+
+Configuring
+===========
+
+Simply load the module.  Avatars are then available at
+http://<host>:5280/avatar/<username>
+
+    modules_enabled = {
+        ...
+        "http_avatar";
+    }
+
+Compatibility
+=============
+
+  ------- --------------
+  trunk   Works
+  0.10    Should work
+  ------- --------------
diff -r e0ef90e96931 -r 1cff081abbed mod_http_avatar/mod_http_avatar.lua
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_http_avatar/mod_http_avatar.lua	Fri Jun 01 22:05:46 2018 +0200
@@ -0,0 +1,43 @@
+-- Prosody IM
+-- Copyright (C) 2018 Emmanuel Gil Peyrot
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+
+local base64 = require"util.encodings".base64;
+local st = require"util.stanza";
+module:depends"http";
+
+local vcard_storage = module:open_store"vcard";
+
+local default_avatar = [[<svg xmlns='http://www.w3.org/2000/svg' version='1.1' viewBox='0 0 150 150'>
+<rect width='150' height='150' fill='#888' stroke-width='1' stroke='#000'/>
+<text x='75' y='100' text-anchor='middle' font-size='100'>?</text>
+</svg>]];
+
+local function get_avatar(event, path)
+	local request, response = event.request, event.response;
+	local photo_type, binval;
+	local vcard, err = vcard_storage:get(path);
+	if vcard then
+		vcard = st.deserialize(vcard);
+		local photo = vcard:get_child("PHOTO", "vcard-temp");
+		if photo then
+			photo_type = photo:get_child_text("TYPE", "vcard-temp");
+			binval = photo:get_child_text("BINVAL", "vcard-temp");
+		end
+	end
+	if not photo_type or not binval then
+		response.status_code = 404;
+		response.headers.content_type = "image/svg+xml";
+		return default_avatar;
+	end
+	response.headers.content_type = photo_type;
+	return base64.decode(binval);
+end
+
+module:provides("http", {
+	route = {
+		["GET /*"] = get_avatar;
+	};
+});