Mercurial > prosody-modules
view mod_http_dir_listing2/mod_http_dir_listing2.lua @ 4651:8231774f5bfd
mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8
The `body:sub()` call risks splitting the string in the middle of a
multi-byte UTF-8 sequence. This should have been caught by util.stanza
validation, but that would have caused some havoc, at the very least causing
the notification to not be sent.
There have been no reports of this happening. Likely because this module
isn't widely deployed among users with languages that use many longer UTF-8
sequences.
The util.encodings.utf8.valid() function is O(n) where only the last
sequence really needs to be checked, but it's in C and expected to be fast.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 22 Aug 2021 13:22:59 +0200 |
parents | ec2984aa53db |
children |
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-- Prosody IM -- Copyright (C) 2012 Kim Alvefur -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- module:set_global(); local server = require"net.http.server"; local lfs = require "lfs"; local stat = lfs.attributes; local build_path = require"socket.url".build_path; local base64_encode = require"util.encodings".base64.encode; local st = require"util.stanza"; local render = require"util.interpolation".new("%b{}", st.xml_escape); local mime = module:shared("/*/http_files/mime"); local function get_resource(resource) local fh = assert(module:load_resource(resource)); local data = fh:read"*a"; fh:close(); return data; end local dir_index_template = get_resource("resources/template.html"); local style = get_resource("resources/style.css"):gsub("url%((.-)%)", function(url) --module:log("debug", "Inlineing %s", url); return "url(data:image/png;base64,"..base64_encode(get_resource("resources/"..url))..")"; end); local function generate_directory_index(path, full_path) local filelist = {}; if path ~= "/" then table.insert(filelist, { class = "parent directory", href = "..", rel = "up", text = "Parent Directory" }); end local mime_map = mime.types; for file in lfs.dir(full_path) do if file:sub(1,1) ~= "." then local attr = stat(full_path..file) or {}; local path = { file }; local file_ext = file:match"%.([^.]+)$"; local type = attr.mode == "file" and file_ext and mime_map and mime_map[file_ext] or nil; local class = table.concat({ attr.mode or "unknown", file_ext, type and type:match"^[^/]+" }, " "); path.is_directory = attr.mode == "directory"; table.insert(filelist, { class = class, href = build_path(path), type = type, text = file }); end end table.sort(filelist, function (a, b) if a.href == ".." then return true end if b.href == ".." then return false end if a.class:match"directory" and not b.class:match"directory" then return true end if not a.class:match"directory" and b.class:match"directory" then return false end return a.text < b.text; end); return render(dir_index_template, { path = path, style = style, filelist = filelist, footer = "Prosody "..prosody.version, }); end module:hook_object_event(server, "directory-index", function (event) local ok, data = pcall(generate_directory_index, event.path, event.full_path); if ok then return data end module:log("warn", data); end);