annotate mod_pastebin/mod_pastebin.lua @ 285:108ac6f16d2d

mod_muc_intercom: Add a delay to the forwarded message.
author Kim Alvefur <zash@zash.se>
date Wed, 08 Dec 2010 19:01:13 +0100
parents 7a695ee3884b
children 7f0cdde1e42a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2 local st = require "util.stanza";
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3 local httpserver = require "net.httpserver";
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4 local uuid_new = require "util.uuid".generate;
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5 local os_time = os.time;
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6 local t_insert, t_remove = table.insert, table.remove;
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7 local add_task = require "util.timer".add_task;
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9 local function drop_invalid_utf8(seq)
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10 local start = seq:byte();
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11 module:log("utf8: %d, %d", start, #seq);
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12 if (start <= 223 and #seq < 2)
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13 or (start >= 224 and start <= 239 and #seq < 3)
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14 or (start >= 240 and start <= 244 and #seq < 4)
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15 or (start > 244) then
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16 return "";
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17 end
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18 return seq;
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19 end
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21 local length_threshold = config.get(module.host, "core", "pastebin_threshold") or 500;
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22 local line_threshold = config.get(module.host, "core", "pastebin_line_threshold") or 4;
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24 local base_url = config.get(module.host, "core", "pastebin_url");
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26 -- Seconds a paste should live for in seconds (config is in hours), default 24 hours
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27 local expire_after = math.floor((config.get(module.host, "core", "pastebin_expire_after") or 24) * 3600);
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29 local trigger_string = config.get(module.host, "core", "pastebin_trigger");
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30 trigger_string = (trigger_string and trigger_string .. " ");
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32 local pastes = {};
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33 local default_headers = { ["Content-Type"] = "text/plain; charset=utf-8" };
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35 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im";
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36 local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
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38 function pastebin_text(text)
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39 local uuid = uuid_new();
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40 pastes[uuid] = { body = text, time = os_time(), headers = default_headers };
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41 pastes[#pastes+1] = uuid;
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42 if not pastes[2] then -- No other pastes, give the timer a kick
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43 add_task(expire_after, expire_pastes);
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44 end
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45 return base_url..uuid;
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46 end
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48 function handle_request(method, body, request)
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49 local pasteid = request.url.path:match("[^/]+$");
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50 if not pasteid or not pastes[pasteid] then
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51 return "Invalid paste id, perhaps it expired?";
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52 end
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54 --module:log("debug", "Received request, replying: %s", pastes[pasteid].text);
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56 return pastes[pasteid];
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57 end
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59 function check_message(data)
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60 local origin, stanza = data.origin, data.stanza;
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61
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62 local body, bodyindex, htmlindex;
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63 for k,v in ipairs(stanza) do
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64 if v.name == "body" then
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65 body, bodyindex = v, k;
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66 elseif v.name == "html" and v.attr.xmlns == xmlns_xhtmlim then
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67 htmlindex = k;
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68 end
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69 end
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71 if not body then return; end
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72 body = body:get_text();
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74 --module:log("debug", "Body(%s) length: %d", type(body), #(body or ""));
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76 if body and (
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77 (#body > length_threshold) or
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78 (trigger_string and body:find(trigger_string, 1, true) == 1) or
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79 (select(2, body:gsub("\n", "%0")) >= line_threshold)
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80 ) then
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81 if trigger_string then
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82 body = body:gsub("^" .. trigger_string, "", 1);
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83 end
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84 local url = pastebin_text(body);
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85 module:log("debug", "Pasted message as %s", url);
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86 --module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex]));
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87 stanza[bodyindex][1] = url;
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88 local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml });
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89 html:tag("p"):text(body:sub(1,150):gsub("[\194-\244][\128-\191]*$", drop_invalid_utf8)):up();
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90 html:tag("a", { href = url }):text("[...]"):up();
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91 stanza[htmlindex or #stanza+1] = html;
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92 end
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93 end
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94
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95 module:hook("message/bare", check_message);
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97 function expire_pastes(time)
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98 time = time or os_time(); -- COMPAT with 0.5
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99 if pastes[1] then
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100 pastes[pastes[1]] = nil;
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101 t_remove(pastes, 1);
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102 if pastes[1] then
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103 return (expire_after - (time - pastes[pastes[1]].time)) + 1;
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104 end
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105 end
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106 end
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107
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108
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109 local ports = config.get(module.host, "core", "pastebin_ports") or { 5280 };
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110 for _, options in ipairs(ports) do
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111 local port, base, ssl, interface = 5280, "pastebin", false, nil;
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112 if type(options) == "number" then
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113 port = options;
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114 elseif type(options) == "table" then
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115 port, base, ssl, interface = options.port or 5280, options.path or "pastebin", options.ssl or false, options.interface;
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116 elseif type(options) == "string" then
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117 base = options;
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118 end
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119
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120 base_url = base_url or ("http://"..module:get_host()..(port ~= 80 and (":"..port) or "").."/"..base.."/");
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121
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122 httpserver.new{ port = port, base = base, handler = handle_request, ssl = ssl }
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123 end