prosody-modules
e3a0ebe671cc
mod_http_upload/mod_http_upload.lua

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mod_http_upload/mod_http_upload.lua @ 1850:e3a0ebe671cc

mod_http_upload: Include failure reason in error response
author Kim Alvefur <zash@zash.se>
date Mon, 14 Sep 2015 12:45:00 +0200
parent 1849:5244c9b0b297
child 1851:03c5639882a7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1772
45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
parents:
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1 -- mod_http_upload
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Kim Alvefur <zash@zash.se>
parents:
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2 --
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Kim Alvefur <zash@zash.se>
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3 -- Copyright (C) 2015 Kim Alvefur
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Kim Alvefur <zash@zash.se>
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4 --
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Kim Alvefur <zash@zash.se>
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5 -- This file is MIT/X11 licensed.
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Kim Alvefur <zash@zash.se>
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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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abacf6698d97 mod_http_upload: Include join_path function, should make it work with 0.9.x
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15 local function join_path(a, b)
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1971ff719e72 mod_http_upload: Fix typo (thanks mo)
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16 return a .. package.config:sub(1,1) .. b;
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parents: 1805
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17 end
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18
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19 -- depends
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20 module:depends("http");
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25c28644fae8 mod_http_upload: Depend on mod_disco, allows it to be discovered when set up as a component
Kim Alvefur <zash@zash.se>
parents: 1772
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21 module:depends("disco");
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22
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23 -- namespace
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24 local xmlns_http_upload = "eu:siacs:conversations:http:upload";
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25
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26 module:add_feature(xmlns_http_upload);
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27
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28 -- state
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29 local pending_slots = module:shared("upload_slots");
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30
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31 local storage_path = join_path(prosody.paths.data, module.name);
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32 lfs.mkdir(storage_path);
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33
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34 -- hooks
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35 module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
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36 local stanza, origin = event.stanza, event.origin;
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37 local request = stanza.tags[1];
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38 -- local clients only
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39 if origin.type ~= "c2s" then
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40 origin.send(st.error_reply(stanza, "cancel", "not-authorized"));
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41 return true;
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42 end
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43 -- validate
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44 local filename = request:get_child_text("filename");
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45 if not filename or filename:find("/") then
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e3a0ebe671cc mod_http_upload: Include failure reason in error response
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parents: 1849
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46 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid filename"));
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47 return true;
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48 end
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Kim Alvefur <zash@zash.se>
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49 local reply = st.reply(stanza);
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Kim Alvefur <zash@zash.se>
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50 reply:tag("slot", { xmlns = xmlns_http_upload });
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Kim Alvefur <zash@zash.se>
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51 local random = uuid();
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52 pending_slots[random.."/"..filename] = origin.full_jid;
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53 local url = module:http_url() .. "/" .. random .. "/" .. filename;
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54 reply:tag("get"):text(url):up();
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55 reply:tag("put"):text(url):up();
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56 origin.send(reply);
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57 return true;
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58 end);
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59
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60 -- http service
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61 local function upload_data(event, path)
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62 if not pending_slots[path] then
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63 return 401;
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64 end
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65 local random, filename = path:match("^([^/]+)/([^/]+)$");
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66 if not random then
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67 return 400;
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68 end
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69 local dirname = join_path(storage_path, random);
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70 if not lfs.mkdir(dirname) then
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71 module:log("error", "Could not create directory %s for upload", dirname);
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72 return 500;
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73 end
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74 local full_filename = join_path(dirname, filename);
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75 local fh, ferr = io.open(full_filename, "w");
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76 if not fh then
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77 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr);
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78 return 500;
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79 end
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80 local ok, err = fh:write(event.request.body);
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81 if not ok then
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82 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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83 os.remove(full_filename);
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84 return 500;
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85 end
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86 ok, err = fh:close();
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87 if not ok then
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88 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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89 os.remove(full_filename);
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90 return 500;
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91 end
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92 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random);
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93 pending_slots[path] = nil;
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94 return 200;
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95 end
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96
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97 local serve_uploaded_files = module:depends("http_files").serve(storage_path);
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parents:
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98
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99 local function size_only(request, data)
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100 request.headers.content_size = #data;
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101 return 200;
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102 end
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103
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104 local function serve_head(event, path)
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105 event.send = size_only;
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parents:
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106 return serve_uploaded_files(event, path);
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107 end
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parents:
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108
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parents:
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109 module:provides("http", {
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parents:
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110 route = {
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111 ["GET /*"] = serve_uploaded_files;
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parents:
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112 ["HEAD /*"] = serve_head;
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Kim Alvefur <zash@zash.se>
parents:
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113 ["PUT /*"] = upload_data;
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Kim Alvefur <zash@zash.se>
parents:
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114 };
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115 });
1849
5244c9b0b297 mod_http_upload: Log a message with the upload URL and storage path for easy discovery
Kim Alvefur <zash@zash.se>
parents: 1848
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116
5244c9b0b297 mod_http_upload: Log a message with the upload URL and storage path for easy discovery
Kim Alvefur <zash@zash.se>
parents: 1848
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117 module:log("info", "URL: <%s>; Storage path: %s", module:http_url(), storage_path);