Mercurial > prosody-modules

annotate mod_http_upload/mod_http_upload.lua @ 1842:98ad01cc83cf

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mod_tls_policy: Add README
author Kim Alvefur <zash@zash.se>
date Sat, 12 Sep 2015 21:02:33 +0200
parents 1971ff719e72
children e5243fa16210
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rev   line source
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45f7e3c2557f mod_http_upload: Implementation of Conversations HTTP upload file transfer mode
Kim Alvefur <zash@zash.se>
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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 -- depends
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20 module:depends("http");
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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 clients only
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38 if origin.type ~= "c2s" then
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39 origin.send(st.error_reply(stanza, "cancel", "not-authorized"));
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40 return true;
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41 end
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42 -- validate
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43 local filename = stanza.tags[1]:get_child_text("filename");
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44 if not filename or filename:find("/") then
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45 origin.send(st.error_reply(stanza, "modify", "bad-request"));
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46 return true;
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47 end
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48 local reply = st.reply(stanza);
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49 reply:tag("slot", { xmlns = xmlns_http_upload });
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50 local random = uuid();
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51 pending_slots[random.."/"..filename] = origin.full_jid;
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52 local url = module:http_url() .. "/" .. random .. "/" .. filename;
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53 reply:tag("get"):text(url):up();
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54 reply:tag("put"):text(url):up();
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55 origin.send(reply);
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56 return true;
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57 end);
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58
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59 -- http service
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60 local function upload_data(event, path)
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61 if not pending_slots[path] then
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62 return 401;
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63 end
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64 local random, filename = path:match("^([^/]+)/([^/]+)$");
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65 if not random then
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66 return 400;
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67 end
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68 local dirname = join_path(storage_path, random);
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69 if not lfs.mkdir(dirname) then
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70 module:log("error", "Could not create directory %s for upload", dirname);
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71 return 500;
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72 end
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73 local full_filename = join_path(dirname, filename);
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74 local fh, ferr = io.open(full_filename, "w");
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75 if not fh then
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76 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr);
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77 return 500;
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78 end
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79 local ok, err = fh:write(event.request.body);
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80 if not ok then
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81 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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82 os.remove(full_filename);
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83 return 500;
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84 end
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85 ok, err = fh:close();
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86 if not ok then
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87 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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88 os.remove(full_filename);
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89 return 500;
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90 end
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91 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random);
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92 pending_slots[path] = nil;
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93 return 200;
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94 end
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95
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96 local serve_uploaded_files = module:depends("http_files").serve(storage_path);
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97
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98 local function size_only(request, data)
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99 request.headers.content_size = #data;
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100 return 200;
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101 end
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102
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103 local function serve_head(event, path)
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104 event.send = size_only;
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105 return serve_uploaded_files(event, path);
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106 end
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107
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108 module:provides("http", {
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109 route = {
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110 ["GET /*"] = serve_uploaded_files;
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111 ["HEAD /*"] = serve_head;
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112 ["PUT /*"] = upload_data;
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113 };
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114 });