frontend-tools: Add script to update text source from URL

Adds a python example script which updates a text source to the text
retrieved from a specific URL that refreshes every specified interval.

UI/frontend-plugins/frontend-tools/data/scripts/url-text.py

+import obspython as obs
+import urllib.request
+import urllib.error
+
+url         = ""
+interval    = 30
+source_name = ""
+
+# ------------------------------------------------------------
+
+def update_text():
+	global url
+	global interval
+	global source_name
+
+	source = obs.obs_get_source_by_name(source_name)
+	if source is not None:
+		try:
+			with urllib.request.urlopen(url) as response:
+				data = response.read()
+				text = data.decode('utf-8')
+
+				settings = obs.obs_data_create()
+				obs.obs_data_set_string(settings, "text", text)
+				obs.obs_source_update(source, settings)
+				obs.obs_data_release(settings)
+
+		except urllib.error.URLError as err:
+			obs.script_log(obs.LOG_WARNING, "Error opening URL '" + url + "': " + err.reason)
+			obs.remove_current_callback()
+
+		obs.obs_source_release(source)
+
+def refresh_pressed(props, prop):
+	update_text()
+
+# ------------------------------------------------------------
+
+def script_description():
+	return "Updates a text source to the text retrieved from a URL at every specified interval.\n\nBy Jim"
+
+def script_update(settings):
+	global url
+	global interval
+	global source_name
+
+	url         = obs.obs_data_get_string(settings, "url")
+	interval    = obs.obs_data_get_int(settings, "interval")
+	source_name = obs.obs_data_get_string(settings, "source")
+
+	obs.timer_remove(update_text)
+
+	if url != "" and source_name != "":
+		obs.timer_add(update_text, interval * 1000)
+
+def script_defaults(settings):
+	obs.obs_data_set_default_int(settings, "interval", 30)
+
+def script_properties():
+	props = obs.obs_properties_create()
+
+	obs.obs_properties_add_text(props, "url", "URL", obs.OBS_TEXT_DEFAULT)
+	obs.obs_properties_add_int(props, "interval", "Update Interval (seconds)", 5, 3600, 1)
+
+	p = obs.obs_properties_add_list(props, "source", "Text Source", obs.OBS_COMBO_TYPE_EDITABLE, obs.OBS_COMBO_FORMAT_STRING)
+	sources = obs.obs_enum_sources()
+	if sources is not None:
+		for source in sources:
+			source_id = obs.obs_source_get_id(source)
+			if source_id == "text_gdiplus" or source_id == "text_ft2_source":
+				name = obs.obs_source_get_name(source)
+				obs.obs_property_list_add_string(p, name, name)
+
+		obs.source_list_release(sources)
+
+	obs.obs_properties_add_button(props, "button", "Refresh", refresh_pressed)
+	return props