annotate mod_pastebin/mod_pastebin.lua @ 5256:44f7edd4f845

mod_http_oauth2: Reject non-local hosts in more code paths We're not issuing tokens for users on remote hosts, we can't even authenticate them since they're remote. Thus the host is always the local module.host so no need to pass around the host in most cases or use it for anything but enforcing the same host.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 17:52:10 +0100
parents f821eeac0e50
children 8aec430ba205
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2 local st = require "util.stanza";
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3 module:depends("http");
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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_remove = table.remove;
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7 local add_task = require "util.timer".add_task;
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8 local jid_bare = require "util.jid".bare;
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10 local function get_room_from_jid() end;
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11 local is_component = module:get_host_type() == "component";
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12 if is_component then
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13 local mod_muc = module:depends "muc";
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14 local muc_rooms = rawget(mod_muc, "rooms");
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15 get_room_from_jid = rawget(mod_muc, "get_room_from_jid") or
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16 function (jid)
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17 return muc_rooms[jid];
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18 end
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19 end
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21 local utf8_pattern = "[\194-\244][\128-\191]*$";
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22 local function drop_invalid_utf8(seq)
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23 local start = seq:byte();
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24 module:log("debug", "utf8: %d, %d", start, #seq);
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25 if (start <= 223 and #seq < 2)
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26 or (start >= 224 and start <= 239 and #seq < 3)
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27 or (start >= 240 and start <= 244 and #seq < 4)
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28 or (start > 244) then
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29 return "";
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30 end
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31 return seq;
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32 end
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33
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34 local function utf8_length(str)
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35 local _, count = string.gsub(str, "[^\128-\193]", "");
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36 return count;
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37 end
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38
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39 local pastebin_private_messages = module:get_option_boolean("pastebin_private_messages", not is_component);
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40 local length_threshold = module:get_option_number("pastebin_threshold", 500);
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41 local line_threshold = module:get_option_number("pastebin_line_threshold", 4);
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42 local max_summary_length = module:get_option_number("pastebin_summary_length", 150);
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43 local html_preview = module:get_option_boolean("pastebin_html_preview", true);
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44
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45 local base_url = module:get_option_string("pastebin_url", module:http_url()):gsub("/$", "").."/";
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46
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47 -- Seconds a paste should live for in seconds (config is in hours), default 24 hours
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48 local expire_after = math.floor(module:get_option_number("pastebin_expire_after", 24) * 3600);
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49
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50 local trigger_string = module:get_option_string("pastebin_trigger");
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51 trigger_string = (trigger_string and trigger_string .. " ");
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52
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53 local pastes = {};
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55 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im";
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56 local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
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57
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58 function pastebin_text(text)
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59 local uuid = uuid_new();
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60 pastes[uuid] = { body = text, time = os_time(), };
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61 pastes[#pastes+1] = uuid;
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62 if not pastes[2] then -- No other pastes, give the timer a kick
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63 add_task(expire_after, expire_pastes);
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64 end
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65 return base_url..uuid;
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66 end
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67
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68 function handle_request(event, pasteid)
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69 event.response.headers.content_type = "text/plain; charset=utf-8";
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70
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71 if not pasteid then
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72 return "Invalid paste id, perhaps it expired?";
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73 end
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75 --module:log("debug", "Received request, replying: %s", pastes[pasteid].text);
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76 local paste = pastes[pasteid];
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77
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78 if not paste then
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79 return "Invalid paste id, perhaps it expired?";
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80 end
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81
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82 return paste.body;
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83 end
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84
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85 local function replace_tag(s, replacement)
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86 local once = false;
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87 s:maptags(function (tag)
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88 if tag.name == replacement.name and tag.attr.xmlns == replacement.attr.xmlns then
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89 if not once then
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90 once = true;
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91 return replacement;
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92 else
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93 return nil;
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94 end
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95 end
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96 return tag;
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97 end);
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98 if not once then
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99 s:add_child(replacement);
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100 end
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101 end
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102
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103 local line_count_pattern = string.rep("[^\n]*\n", line_threshold + 1):sub(1,-2);
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104
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105 function check_message(data)
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106 local stanza = data.stanza;
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107
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108 -- Only check for MUC presence when loaded on a component.
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109 if is_component then
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110 local room = get_room_from_jid(jid_bare(stanza.attr.to));
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111 if not room then return; end
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112
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113 local nick = room._jid_nick[stanza.attr.from];
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114 if not nick then return; end
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115 end
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116
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117 local body = stanza:get_child_text("body");
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118
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119 if not body then return; end
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120
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121 --module:log("debug", "Body(%s) length: %d", type(body), #(body or ""));
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122
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123 if ( #body > length_threshold and utf8_length(body) > length_threshold ) or
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124 (trigger_string and body:find(trigger_string, 1, true) == 1) or
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125 body:find(line_count_pattern) then
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126 if trigger_string and body:sub(1, #trigger_string) == trigger_string then
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127 body = body:sub(#trigger_string+1);
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0d37d18ea073 mod_pastebin: Fix trigger_string matching when no trigger is set, and add support for counting lines (pastebin_line_threshold, default: 4)
Matthew Wild <mwild1@gmail.com>
parents: 156
diff changeset
128 end
75
3c7189e26848 mod_pastebin: Rename pastebin_message() to pastebin_text() and make it global so it can be called by other plugins
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parents: 71
diff changeset
129 local url = pastebin_text(body);
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1017
diff changeset
130 module:log("debug", "Pasted message as %s", url);
5
9c1c6c5344dc mod_pastebin: Initial commit
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parents:
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131 --module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex]));
446
56f1c29ee7f1 mod_pastebin: Some experimental summary changes
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parents: 445
diff changeset
132 local summary = (body:sub(1, max_summary_length):gsub(utf8_pattern, drop_invalid_utf8) or ""):match("[^\n]+") or "";
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133 summary = summary:match("^%s*(.-)%s*$");
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134 local summary_prefixed = summary:match("[,:]$");
3196
01503000d2f1 mod_pastebin: Make first line and URL more clearly separated
Kim Alvefur <zash@zash.se>
parents: 3140
diff changeset
135 replace_tag(stanza, st.stanza("body"):text(summary .. "\n" .. url));
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1017
diff changeset
136
3034
6e9096b66704 mod_pastebin: Add an OOB tag pointing to the pastebin URL
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parents: 3033
diff changeset
137 stanza:add_child(st.stanza("query", { xmlns = "jabber:iq:oob" }):tag("url"):text(url));
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parents: 3033
diff changeset
138
446
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parents: 445
diff changeset
139 if html_preview then
513
5e8843a869a3 mod_pastebin: Fix off-by-one in line counting (display issue only)
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parents: 512
diff changeset
140 local line_count = select(2, body:gsub("\n", "%0")) + 1;
446
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parents: 445
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141 local link_text = ("[view %spaste (%d line%s)]"):format(summary_prefixed and "" or "rest of ", line_count, line_count == 1 and "" or "s");
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parents: 445
diff changeset
142 local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml });
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parents: 445
diff changeset
143 html:tag("p"):text(summary.." "):up();
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parents: 445
diff changeset
144 html:tag("a", { href = url }):text(link_text):up();
3028
ded630a87563 mod_pastebin: Replace tags using :maptags API instead of hacky direct manipulation
Kim Alvefur <zash@zash.se>
parents: 3027
diff changeset
145 replace_tag(stanza, html);
446
56f1c29ee7f1 mod_pastebin: Some experimental summary changes
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parents: 445
diff changeset
146 end
5
9c1c6c5344dc mod_pastebin: Initial commit
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parents:
diff changeset
147 end
9c1c6c5344dc mod_pastebin: Initial commit
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parents:
diff changeset
148 end
9c1c6c5344dc mod_pastebin: Initial commit
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parents:
diff changeset
149
9c1c6c5344dc mod_pastebin: Initial commit
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parents:
diff changeset
150 module:hook("message/bare", check_message);
438
7f0cdde1e42a mod_pastebin: Add option 'pastebin_private_messages', defaults to false for components and true for other hosts (thanks Kelden/Maranda)
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parents: 190
diff changeset
151 if pastebin_private_messages then
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parents: 190
diff changeset
152 module:hook("message/full", check_message);
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parents: 190
diff changeset
153 end
5
9c1c6c5344dc mod_pastebin: Initial commit
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parents:
diff changeset
154
3345
4a12abccdbaf mod_pastebin: Advertise a disco feature and current thresholds
Kim Alvefur <zash@zash.se>
parents: 3196
diff changeset
155 module:hook("muc-disco#info", function (event)
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Kim Alvefur <zash@zash.se>
parents: 3196
diff changeset
156 local reply, form, formdata = event.reply, event.form, event.formdata;
4a12abccdbaf mod_pastebin: Advertise a disco feature and current thresholds
Kim Alvefur <zash@zash.se>
parents: 3196
diff changeset
157 reply:tag("feature", { var = "https://modules.prosody.im/mod_pastebin" }):up();
3868
09e7e880e056 mod_pastebin: Follow XEP-0068 and use Clark notation in disco#info
Kim Alvefur <zash@zash.se>
parents: 3346
diff changeset
158 table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_lines", datatype = "xs:integer" });
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parents: 3346
diff changeset
159 table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_characters", datatype = "xs:integer" });
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parents: 3346
diff changeset
160 formdata["{https://modules.prosody.im/mod_pastebin}max_lines"] = tostring(line_threshold);
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parents: 3346
diff changeset
161 formdata["{https://modules.prosody.im/mod_pastebin}max_characters"] = tostring(length_threshold);
3345
4a12abccdbaf mod_pastebin: Advertise a disco feature and current thresholds
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parents: 3196
diff changeset
162 end);
4a12abccdbaf mod_pastebin: Advertise a disco feature and current thresholds
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parents: 3196
diff changeset
163
24
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
Matthew Wild <mwild1@gmail.com>
parents: 23
diff changeset
164 function expire_pastes(time)
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parents: 23
diff changeset
165 time = time or os_time(); -- COMPAT with 0.5
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parents: 23
diff changeset
166 if pastes[1] then
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
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parents: 23
diff changeset
167 pastes[pastes[1]] = nil;
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
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parents: 23
diff changeset
168 t_remove(pastes, 1);
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
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parents: 23
diff changeset
169 if pastes[1] then
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parents: 23
diff changeset
170 return (expire_after - (time - pastes[pastes[1]].time)) + 1;
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
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parents: 23
diff changeset
171 end
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
Matthew Wild <mwild1@gmail.com>
parents: 23
diff changeset
172 end
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
Matthew Wild <mwild1@gmail.com>
parents: 23
diff changeset
173 end
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
Matthew Wild <mwild1@gmail.com>
parents: 23
diff changeset
174
72bcc0475e2f mod_pastebin: Expire pastes after 'pastebin_expire_after' hours, 24 by default
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parents: 23
diff changeset
175
654
7e444de959bb mod_pastebin: Update to the new HTTP API
Kim Alvefur <zash@zash.se>
parents: 565
diff changeset
176 module:provides("http", {
7e444de959bb mod_pastebin: Update to the new HTTP API
Kim Alvefur <zash@zash.se>
parents: 565
diff changeset
177 route = {
7e444de959bb mod_pastebin: Update to the new HTTP API
Kim Alvefur <zash@zash.se>
parents: 565
diff changeset
178 ["GET /*"] = handle_request;
7e444de959bb mod_pastebin: Update to the new HTTP API
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parents: 565
diff changeset
179 };
7e444de959bb mod_pastebin: Update to the new HTTP API
Kim Alvefur <zash@zash.se>
parents: 565
diff changeset
180 });
454
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
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parents: 446
diff changeset
181
517
f866325305ed mod_pastebin: Make last commit work (also set on restore)
Matthew Wild <mwild1@gmail.com>
parents: 516
diff changeset
182 local function set_pastes_metatable()
3033
b2b129f699ed mod_pastebin: Silence some warnings [luacheck]
Kim Alvefur <zash@zash.se>
parents: 3032
diff changeset
183 -- luacheck: ignore 212/pastes 431/pastes
516
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
184 if expire_after == 0 then
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
185 local dm = require "util.datamanager";
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
186 setmetatable(pastes, {
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parents: 514
diff changeset
187 __index = function (pastes, id)
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
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parents: 514
diff changeset
188 if type(id) == "string" then
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
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parents: 514
diff changeset
189 return dm.load(id, module.host, "pastebin");
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
190 end
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
191 end;
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
192 __newindex = function (pastes, id, data)
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
193 if type(id) == "string" then
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
194 dm.store(id, module.host, "pastebin", data);
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
195 end
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
196 end;
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
197 });
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
198 else
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
199 setmetatable(pastes, nil);
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
200 end
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
201 end
3d3687fef751 mod_pastebin: Fix issue with metatable not being set when a reload changes expires_after to 0
Matthew Wild <mwild1@gmail.com>
parents: 514
diff changeset
202
517
f866325305ed mod_pastebin: Make last commit work (also set on restore)
Matthew Wild <mwild1@gmail.com>
parents: 516
diff changeset
203 module.load = set_pastes_metatable;
f866325305ed mod_pastebin: Make last commit work (also set on restore)
Matthew Wild <mwild1@gmail.com>
parents: 516
diff changeset
204
454
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
Matthew Wild <mwild1@gmail.com>
parents: 446
diff changeset
205 function module.save()
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
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parents: 446
diff changeset
206 return { pastes = pastes };
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
Matthew Wild <mwild1@gmail.com>
parents: 446
diff changeset
207 end
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
Matthew Wild <mwild1@gmail.com>
parents: 446
diff changeset
208
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
Matthew Wild <mwild1@gmail.com>
parents: 446
diff changeset
209 function module.restore(data)
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
Matthew Wild <mwild1@gmail.com>
parents: 446
diff changeset
210 pastes = data.pastes or pastes;
517
f866325305ed mod_pastebin: Make last commit work (also set on restore)
Matthew Wild <mwild1@gmail.com>
parents: 516
diff changeset
211 set_pastes_metatable();
454
3f101f7a26d0 mod_pastebin: Preserve pastes through a reload
Matthew Wild <mwild1@gmail.com>
parents: 446
diff changeset
212 end