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mod_http_upload/mod_http_upload.lua @ 1858:5daabb5fe24a
mod_limit_auth: Add README
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 14 Sep 2015 13:36:29 +0200 |
parent | 1851:03c5639882a7 |
child | 1874:8ef500508c59 |
rev | line source |
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1 -- mod_http_upload |
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2 -- |
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3 -- Copyright (C) 2015 Kim Alvefur |
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4 -- |
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5 -- This file is MIT/X11 licensed. |
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6 -- |
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7 -- Implementation of HTTP Upload file transfer mechanism used by Conversations |
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8 -- |
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9 |
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10 -- imports |
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11 local st = require"util.stanza"; |
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12 local lfs = require"lfs"; |
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13 local uuid = require"util.uuid".generate; |
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14 |
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15 local function join_path(a, b) |
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16 return a .. package.config:sub(1,1) .. b; |
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17 end |
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18 |
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19 -- config |
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20 local file_size_limit = module:get_option_number(module.name .. "_file_size_limit", 10 * 1024 * 1024); -- 10 MB |
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21 |
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22 -- depends |
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23 module:depends("http"); |
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24 module:depends("disco"); |
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25 |
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26 -- namespace |
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27 local xmlns_http_upload = "eu:siacs:conversations:http:upload"; |
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28 |
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29 module:add_feature(xmlns_http_upload); |
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30 |
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31 -- state |
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32 local pending_slots = module:shared("upload_slots"); |
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33 |
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34 local storage_path = join_path(prosody.paths.data, module.name); |
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35 lfs.mkdir(storage_path); |
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36 |
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37 -- hooks |
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38 module:hook("iq/host/"..xmlns_http_upload..":request", function (event) |
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39 local stanza, origin = event.stanza, event.origin; |
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40 local request = stanza.tags[1]; |
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41 -- local clients only |
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42 if origin.type ~= "c2s" then |
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43 origin.send(st.error_reply(stanza, "cancel", "not-authorized")); |
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44 return true; |
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45 end |
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46 -- validate |
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47 local filename = request:get_child_text("filename"); |
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48 if not filename or filename:find("/") then |
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49 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid filename")); |
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50 return true; |
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51 end |
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52 local filesize = tonumber(request:get_child_text("size")); |
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53 if not filesize then |
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54 origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing or invalid file size")); |
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55 return true; |
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56 elseif filesize > file_size_limit then |
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57 origin.send(st.error_reply(stanza, "modify", "not-acceptable", "File too large", |
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58 st.stanza("file-too-large", {xmlns=xmlns_http_upload}) |
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59 :tag("max-size"):text(tostring(file_size_limit)))); |
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60 return true; |
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61 end |
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62 local reply = st.reply(stanza); |
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63 reply:tag("slot", { xmlns = xmlns_http_upload }); |
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64 local random = uuid(); |
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65 pending_slots[random.."/"..filename] = origin.full_jid; |
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66 local url = module:http_url() .. "/" .. random .. "/" .. filename; |
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67 reply:tag("get"):text(url):up(); |
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68 reply:tag("put"):text(url):up(); |
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69 origin.send(reply); |
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70 return true; |
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71 end); |
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72 |
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73 -- http service |
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74 local function upload_data(event, path) |
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75 if not pending_slots[path] then |
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76 return 401; |
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77 end |
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78 local random, filename = path:match("^([^/]+)/([^/]+)$"); |
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79 if not random then |
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80 return 400; |
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81 end |
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82 if #event.request.body > file_size_limit then |
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83 module:log("error", "Uploaded file too large %d bytes", #event.request.body); |
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84 return 400; |
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85 end |
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86 local dirname = join_path(storage_path, random); |
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87 if not lfs.mkdir(dirname) then |
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88 module:log("error", "Could not create directory %s for upload", dirname); |
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89 return 500; |
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90 end |
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91 local full_filename = join_path(dirname, filename); |
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92 local fh, ferr = io.open(full_filename, "w"); |
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93 if not fh then |
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94 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr); |
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95 return 500; |
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96 end |
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97 local ok, err = fh:write(event.request.body); |
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98 if not ok then |
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99 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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100 os.remove(full_filename); |
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101 return 500; |
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102 end |
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103 ok, err = fh:close(); |
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104 if not ok then |
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105 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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106 os.remove(full_filename); |
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107 return 500; |
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108 end |
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109 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random); |
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110 pending_slots[path] = nil; |
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111 return 200; |
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112 end |
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113 |
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114 local serve_uploaded_files = module:depends("http_files").serve(storage_path); |
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115 |
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116 local function size_only(request, data) |
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117 request.headers.content_size = #data; |
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118 return 200; |
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119 end |
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120 |
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121 local function serve_head(event, path) |
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122 event.send = size_only; |
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123 return serve_uploaded_files(event, path); |
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124 end |
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125 |
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126 module:provides("http", { |
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127 route = { |
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128 ["GET /*"] = serve_uploaded_files; |
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129 ["HEAD /*"] = serve_head; |
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130 ["PUT /*"] = upload_data; |
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131 }; |
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132 }); |
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133 |
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134 module:log("info", "URL: <%s>; Storage path: %s", module:http_url(), storage_path); |