Software / code / prosody
File
util/session.lua @ 13854:0b01f40df0f9 13.0
mod_http_file_share: Add media-src 'self' to Content-Security-Policy header
This allows certain media files to be loaded when navigated to directly in a
web browser.
Note that in some browsers (Chrome), the media gets transformed
internally into a HTML page with some basic styles, but these are blocked due
to our default-src policy of 'none' Although this could be unblocked with
style-src unsafe-inline, it is not our plan to fix this, because this would
have negative security implications.
The reason for our CSP is to prevent the file share service from being used to
host malicious HTML/CSS/JS. Yes, CSS can be malicious.
Our file share service is for uploading and downloading files, it is not a
substitute for website/content hosting.
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Fri, 18 Apr 2025 12:25:06 +0100 |
| parent | 13165:9c13c11b199d |
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local initialize_filters = require "prosody.util.filters".initialize; local time = require "prosody.util.time"; local logger = require "prosody.util.logger"; local function new_session(typ) local session = { type = typ .. "_unauthed"; base_type = typ; since = time.now(); }; return session; end local function set_id(session) local id = session.base_type .. tostring(session):match("%x+$"):lower(); session.id = id; return session; end local function set_logger(session) local log = logger.init(session.id); session.log = log; return session; end local function set_conn(session, conn) session.conn = conn; session.ip = conn:ip(); return session; end local function set_send(session) local conn = session.conn; if not conn then function session.send(data) session.log("debug", "Discarding data sent to unconnected session: %s", data); return false; end return session; end local filter = initialize_filters(session); local w = conn.write; session.send = function (t) if t.name then t = filter("stanzas/out", t); end if t then t = filter("bytes/out", tostring(t)); if t then local ret, err = w(conn, t); if not ret then session.log("debug", "Error writing to connection: %s", err); return false, err; end end end return true; end return session; end local function set_role(session, role) session.role = role; end return { new = new_session; set_id = set_id; set_logger = set_logger; set_conn = set_conn; set_send = set_send; set_role = set_role; }