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teal-src/util/xtemplate.tl @ 12894:0598d822614f 0.12 0.12.3
mod_websocket: Fire pre-session-close event (fixes #1800)
This event was added in a7c183bb4e64 and is required to make mod_smacks know
that a session was intentionally closed and shouldn't be hibernated (see
fcea4d9e7502).
Because this was missing from mod_websocket's session.close(), mod_smacks
would always attempt to hibernate websocket sessions even if they closed
cleanly.
That mod_websocket has its own copy of session.close() is something to fix
another day (probably not in the stable branch). So for now this commit makes
the minimal change to get things working again.
Thanks to Damian and the Jitsi team for reporting.
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 20 Feb 2023 18:10:15 +0000 |
parent | 12213:dc9d63166488 |
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-- render(template, stanza) --> string -- {path} --> stanza:find(path) -- {{ns}name/child|each({ns}name){sub-template}} --[[ template ::= "{" path ("|" name ("(" args ")")? (template)? )* "}" path ::= defined by util.stanza name ::= %w+ args ::= anything with balanced ( ) pairs ]] local s_gsub = string.gsub; local s_match = string.match; local s_sub = string.sub; local t_concat = table.concat; local st = require "util.stanza"; local type escape_t = function (string) : string local type filter_t = function (string, string | st.stanza_t, string) : string | st.stanza_t, boolean local type filter_coll = { string : filter_t } local function render(template : string, root : st.stanza_t, escape : escape_t, filters : filter_coll) : string escape = escape or st.xml_escape; return (s_gsub(template, "%b{}", function(block : string) : string local inner = s_sub(block, 2, -2); local path, pipe, pos = s_match(inner, "^([^|]+)(|?)()"); if not path is string then return end local value : string | st.stanza_t if path == "." then value = root; elseif path == "#" then value = root:get_text(); else value = root:find(path); end local is_escaped = false; while pipe == "|" do local func, args, tmpl, p = s_match(inner, "^(%w+)(%b())(%b{})()", pos as integer); if not func then func, args, p = s_match(inner, "^(%w+)(%b())()", pos as integer); end if not func then func, tmpl, p = s_match(inner, "^(%w+)(%b{})()", pos as integer); end if not func then func, p = s_match(inner, "^(%w+)()", pos as integer); end if not func then break end if tmpl then tmpl = s_sub(tmpl, 2, -2); end if args then args = s_sub(args, 2, -2); end if func == "each" and tmpl and st.is_stanza(value) then if not args then value, args = root, path; end local ns, name = s_match(args, "^(%b{})(.*)$"); if ns then ns = s_sub(ns, 2, -2); else name, ns = args, nil; end if ns == "" then ns = nil; end if name == "" then name = nil; end local out, i = {}, 1; for c in (value as st.stanza_t):childtags(name, ns) do out[i], i = render(tmpl, c, escape, filters), i + 1; end value = t_concat(out); is_escaped = true; elseif func == "and" and tmpl then local condition = value; if args then condition = root:find(args); end if condition then value = render(tmpl, root, escape, filters); is_escaped = true; end elseif func == "or" and tmpl then local condition = value; if args then condition = root:find(args); end if not condition then value = render(tmpl, root, escape, filters); is_escaped = true; end elseif filters and filters[func] then local f = filters[func]; if args == nil then value, is_escaped = f(value, tmpl); else value, is_escaped = f(args, value, tmpl); end else error("No such filter function: " .. func); end pipe, pos = s_match(inner, "^(|?)()", p as integer); end if value is string then if not is_escaped then value = escape(value); end return value; elseif st.is_stanza(value) then value = value:get_text(); if value then return escape(value); end end return ""; end)); end return { render = render };