Mercurial > prosody-modules
annotate mod_http_upload/mod_http_upload.lua @ 1912:24c22cbb86e4
mod_http_upload: Duplicate code from net.http.server in order send proper HEAD responses
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 18 Oct 2015 17:25:14 +0200 |
parents | 5849d70bcd37 |
children | b01d60dfa405 |
rev | line source |
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mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
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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 local t_concat = table.concat; |
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15 local t_insert = table.insert; |
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16 |
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17 local function join_path(a, b) |
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18 return a .. package.config:sub(1,1) .. b; |
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19 end |
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20 |
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21 -- config |
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22 local file_size_limit = module:get_option_number(module.name .. "_file_size_limit", 10 * 1024 * 1024); -- 10 MB |
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23 |
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24 -- depends |
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25 module:depends("http"); |
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26 module:depends("disco"); |
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27 |
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28 -- namespace |
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29 local xmlns_http_upload = "urn:xmpp:http:upload"; |
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30 |
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31 module:add_feature(xmlns_http_upload); |
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32 |
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33 -- state |
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34 local pending_slots = module:shared("upload_slots"); |
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35 |
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36 local storage_path = join_path(prosody.paths.data, module.name); |
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37 lfs.mkdir(storage_path); |
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38 |
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39 -- hooks |
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40 module:hook("iq/host/"..xmlns_http_upload..":request", function (event) |
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41 local stanza, origin = event.stanza, event.origin; |
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42 local request = stanza.tags[1]; |
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43 -- local clients only |
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44 if origin.type ~= "c2s" then |
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45 origin.send(st.error_reply(stanza, "cancel", "not-authorized")); |
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46 return true; |
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47 end |
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48 -- validate |
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49 local filename = request:get_child_text("filename"); |
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50 if not filename or filename:find("/") then |
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51 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid filename")); |
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52 return true; |
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53 end |
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54 local filesize = tonumber(request:get_child_text("size")); |
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55 if not filesize then |
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56 origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing or invalid file size")); |
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57 return true; |
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58 elseif filesize > file_size_limit then |
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59 origin.send(st.error_reply(stanza, "modify", "not-acceptable", "File too large", |
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60 st.stanza("file-too-large", {xmlns=xmlns_http_upload}) |
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61 :tag("max-size"):text(tostring(file_size_limit)))); |
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62 return true; |
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63 end |
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64 local reply = st.reply(stanza); |
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65 reply:tag("slot", { xmlns = xmlns_http_upload }); |
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66 local random = uuid(); |
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67 pending_slots[random.."/"..filename] = origin.full_jid; |
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68 local url = module:http_url() .. "/" .. random .. "/" .. filename; |
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69 reply:tag("get"):text(url):up(); |
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70 reply:tag("put"):text(url):up(); |
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71 origin.send(reply); |
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72 return true; |
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73 end); |
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74 |
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75 -- http service |
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76 local function upload_data(event, path) |
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77 if not pending_slots[path] then |
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78 return 401; |
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79 end |
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80 local random, filename = path:match("^([^/]+)/([^/]+)$"); |
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81 if not random then |
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82 return 400; |
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83 end |
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84 if #event.request.body > file_size_limit then |
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85 module:log("error", "Uploaded file too large %d bytes", #event.request.body); |
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86 return 400; |
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87 end |
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88 local dirname = join_path(storage_path, random); |
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89 if not lfs.mkdir(dirname) then |
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90 module:log("error", "Could not create directory %s for upload", dirname); |
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91 return 500; |
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92 end |
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93 local full_filename = join_path(dirname, filename); |
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94 local fh, ferr = io.open(full_filename, "w"); |
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95 if not fh then |
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96 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr); |
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97 return 500; |
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98 end |
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99 local ok, err = fh:write(event.request.body); |
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100 if not ok then |
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101 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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102 os.remove(full_filename); |
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103 return 500; |
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104 end |
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105 ok, err = fh:close(); |
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106 if not ok then |
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107 module:log("error", "Could not write to file %s for upload: %s", full_filename, err); |
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108 os.remove(full_filename); |
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109 return 500; |
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110 end |
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111 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random); |
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112 pending_slots[path] = nil; |
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113 return 200; |
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114 end |
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115 |
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116 -- FIXME Duplicated from net.http.server |
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117 |
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118 local codes = require "net.http.codes"; |
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119 local headerfix = setmetatable({}, { |
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120 __index = function(t, k) |
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121 local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": "; |
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122 t[k] = v; |
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123 return v; |
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124 end |
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125 }); |
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126 |
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127 local function send_response_sans_body(response, body) |
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128 if response.finished then return; end |
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129 response.finished = true; |
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130 response.conn._http_open_response = nil; |
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131 |
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132 local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]); |
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133 local headers = response.headers; |
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134 body = body or response.body or ""; |
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135 headers.content_length = #body; |
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136 |
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137 local output = { status_line }; |
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138 for k,v in pairs(headers) do |
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139 t_insert(output, headerfix[k]..v); |
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140 end |
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141 t_insert(output, "\r\n\r\n"); |
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142 -- Here we *don't* add the body to the output |
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143 |
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144 response.conn:write(t_concat(output)); |
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145 if response.on_destroy then |
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146 response:on_destroy(); |
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147 response.on_destroy = nil; |
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148 end |
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149 if response.persistent then |
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150 response:finish_cb(); |
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151 else |
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152 response.conn:close(); |
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153 end |
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154 end |
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155 |
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156 local serve_uploaded_files = module:depends("http_files").serve(storage_path); |
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157 |
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158 local function serve_head(event, path) |
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159 event.response.send = send_response_sans_body; |
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160 return serve_uploaded_files(event, path); |
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161 end |
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162 |
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163 module:provides("http", { |
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164 route = { |
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165 ["GET /*"] = serve_uploaded_files; |
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166 ["HEAD /*"] = serve_head; |
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167 ["PUT /*"] = upload_data; |
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168 }; |
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169 }); |
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170 |
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171 module:log("info", "URL: <%s>; Storage path: %s", module:http_url(), storage_path); |