Mercurial > prosody-modules
annotate mod_pastebin/mod_pastebin.lua @ 2170:4652a112a4ba
mod_graceful_shutdown: Experiment in improving the shutdown experience
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Thu, 05 May 2016 15:43:01 +0200 |
| parents | 7dbde05b48a9 |
| children | 314cebb3071e |
| rev | line source |
|---|---|
| 5 | 1 |
| 2 local st = require "util.stanza"; | |
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3 module:depends("http"); |
| 5 | 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; |
| 5 | 8 |
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9 local utf8_pattern = "[\194-\244][\128-\191]*$"; |
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10 local function drop_invalid_utf8(seq) |
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11 local start = seq:byte(); |
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12 module:log("debug", "utf8: %d, %d", start, #seq); |
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13 if (start <= 223 and #seq < 2) |
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14 or (start >= 224 and start <= 239 and #seq < 3) |
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15 or (start >= 240 and start <= 244 and #seq < 4) |
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16 or (start > 244) then |
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17 return ""; |
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18 end |
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19 return seq; |
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20 end |
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21 |
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22 local function utf8_length(str) |
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23 local _, count = string.gsub(str, "[^\128-\193]", ""); |
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24 return count; |
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25 end |
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26 |
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27 local pastebin_private_messages = module:get_option_boolean("pastebin_private_messages", hosts[module.host].type ~= "component"); |
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28 local length_threshold = module:get_option_number("pastebin_threshold", 500); |
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29 local line_threshold = module:get_option_number("pastebin_line_threshold", 4); |
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30 local max_summary_length = module:get_option_number("pastebin_summary_length", 150); |
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31 local html_preview = module:get_option_boolean("pastebin_html_preview", true); |
| 5 | 32 |
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33 local base_url = module:get_option_string("pastebin_url", module:http_url()):gsub("/$", "").."/"; |
| 5 | 34 |
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35 -- Seconds a paste should live for in seconds (config is in hours), default 24 hours |
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36 local expire_after = math.floor(module:get_option_number("pastebin_expire_after", 24) * 3600); |
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37 |
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38 local trigger_string = module:get_option_string("pastebin_trigger"); |
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39 trigger_string = (trigger_string and trigger_string .. " "); |
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40 |
| 5 | 41 local pastes = {}; |
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42 local default_headers = { ["Content-Type"] = "text/plain; charset=utf-8" }; |
| 5 | 43 |
| 44 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im"; | |
| 45 local xmlns_xhtml = "http://www.w3.org/1999/xhtml"; | |
| 46 | |
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47 function pastebin_text(text) |
| 5 | 48 local uuid = uuid_new(); |
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49 pastes[uuid] = { body = text, time = os_time(), headers = default_headers }; |
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50 pastes[#pastes+1] = uuid; |
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51 if not pastes[2] then -- No other pastes, give the timer a kick |
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52 add_task(expire_after, expire_pastes); |
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53 end |
| 5 | 54 return base_url..uuid; |
| 55 end | |
| 56 | |
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57 function handle_request(event, pasteid) |
| 5 | 58 if not pasteid or not pastes[pasteid] then |
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59 event.response.headers = default_headers; |
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60 return event.response:send("Invalid paste id, perhaps it expired?"); |
| 5 | 61 end |
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62 |
| 5 | 63 --module:log("debug", "Received request, replying: %s", pastes[pasteid].text); |
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64 |
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65 return pastes[pasteid]; |
| 5 | 66 end |
| 67 | |
| 68 function check_message(data) | |
| 69 local origin, stanza = data.origin, data.stanza; | |
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70 |
| 5 | 71 local body, bodyindex, htmlindex; |
| 72 for k,v in ipairs(stanza) do | |
| 73 if v.name == "body" then | |
| 74 body, bodyindex = v, k; | |
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75 elseif v.name == "html" and v.attr.xmlns == xmlns_xhtmlim then |
| 5 | 76 htmlindex = k; |
| 77 end | |
| 78 end | |
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79 |
| 5 | 80 if not body then return; end |
| 81 body = body:get_text(); | |
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82 |
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83 --module:log("debug", "Body(%s) length: %d", type(body), #(body or "")); |
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84 |
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85 if body and ( |
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86 ((#body > length_threshold) |
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87 and (utf8_length(body) > length_threshold)) or |
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88 (trigger_string and body:find(trigger_string, 1, true) == 1) or |
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89 (select(2, body:gsub("\n", "%0")) >= line_threshold) |
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90 ) then |
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91 if trigger_string then |
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92 body = body:gsub("^" .. trigger_string, "", 1); |
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93 end |
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94 local url = pastebin_text(body); |
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95 module:log("debug", "Pasted message as %s", url); |
| 5 | 96 --module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex])); |
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97 local summary = (body:sub(1, max_summary_length):gsub(utf8_pattern, drop_invalid_utf8) or ""):match("[^\n]+") or ""; |
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98 summary = summary:match("^%s*(.-)%s*$"); |
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99 local summary_prefixed = summary:match("[,:]$"); |
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100 stanza[bodyindex][1] = (summary_prefixed and (summary.." ") or "")..url; |
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101 |
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102 if html_preview then |
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103 local line_count = select(2, body:gsub("\n", "%0")) + 1; |
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104 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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105 local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml }); |
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106 html:tag("p"):text(summary.." "):up(); |
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107 html:tag("a", { href = url }):text(link_text):up(); |
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108 stanza[htmlindex or #stanza+1] = html; |
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109 end |
| 5 | 110 end |
| 111 end | |
| 112 | |
| 113 module:hook("message/bare", check_message); | |
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114 if pastebin_private_messages then |
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115 module:hook("message/full", check_message); |
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116 end |
| 5 | 117 |
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118 function expire_pastes(time) |
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119 time = time or os_time(); -- COMPAT with 0.5 |
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120 if pastes[1] then |
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121 pastes[pastes[1]] = nil; |
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122 t_remove(pastes, 1); |
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123 if pastes[1] then |
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124 return (expire_after - (time - pastes[pastes[1]].time)) + 1; |
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125 end |
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126 end |
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127 end |
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128 |
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129 |
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130 module:provides("http", { |
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131 route = { |
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132 ["GET /*"] = handle_request; |
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133 }; |
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134 }); |
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135 |
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136 local function set_pastes_metatable() |
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137 if expire_after == 0 then |
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138 local dm = require "util.datamanager"; |
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139 setmetatable(pastes, { |
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140 __index = function (pastes, id) |
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141 if type(id) == "string" then |
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142 return dm.load(id, module.host, "pastebin"); |
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143 end |
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144 end; |
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145 __newindex = function (pastes, id, data) |
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146 if type(id) == "string" then |
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147 dm.store(id, module.host, "pastebin", data); |
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148 end |
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149 end; |
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150 }); |
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151 else |
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152 setmetatable(pastes, nil); |
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153 end |
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154 end |
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155 |
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156 module.load = set_pastes_metatable; |
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157 |
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158 function module.save() |
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159 return { pastes = pastes }; |
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160 end |
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161 |
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162 function module.restore(data) |
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163 pastes = data.pastes or pastes; |
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164 set_pastes_metatable(); |
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165 end |