Mercurial > prosody-modules

annotate mod_http_upload/mod_http_upload.lua @ 1809:0b7d65b4f576

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CONTRIBUTING: Run through pandoc to normalize markdown syntax
author Kim Alvefur <zash@zash.se>
date Mon, 31 Aug 2015 17:29:48 +0200
parents 25c28644fae8
children abacf6698d97
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>
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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 join_path = require"util.paths".join;
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14 local uuid = require"util.uuid".generate;
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15
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16 -- depends
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17 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
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18 module:depends("disco");
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19
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20 -- namespace
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21 local xmlns_http_upload = "eu:siacs:conversations:http:upload";
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22
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23 module:add_feature(xmlns_http_upload);
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24
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25 -- state
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26 local pending_slots = module:shared("upload_slots");
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27
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28 local storage_path = join_path(prosody.paths.data, module.name);
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29 lfs.mkdir(storage_path);
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30
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31 -- hooks
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32 module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
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33 local stanza, origin = event.stanza, event.origin;
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34 -- local clients only
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35 if origin.type ~= "c2s" then
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36 origin.send(st.error_reply(stanza, "cancel", "not-authorized"));
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37 return true;
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38 end
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39 -- validate
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40 local filename = stanza.tags[1]:get_child_text("filename");
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41 if not filename or filename:find("/") then
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42 origin.send(st.error_reply(stanza, "modify", "bad-request"));
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43 return true;
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44 end
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45 local reply = st.reply(stanza);
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46 reply:tag("slot", { xmlns = xmlns_http_upload });
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47 local random = uuid();
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48 pending_slots[random.."/"..filename] = origin.full_jid;
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49 local url = module:http_url() .. "/" .. random .. "/" .. filename;
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50 reply:tag("get"):text(url):up();
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51 reply:tag("put"):text(url):up();
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52 origin.send(reply);
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53 return true;
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54 end);
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55
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56 -- http service
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57 local function upload_data(event, path)
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58 if not pending_slots[path] then
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59 return 401;
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60 end
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61 local random, filename = path:match("^([^/]+)/([^/]+)$");
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62 if not random then
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63 return 400;
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64 end
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65 local dirname = join_path(storage_path, random);
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66 if not lfs.mkdir(dirname) then
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67 module:log("error", "Could not create directory %s for upload", dirname);
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68 return 500;
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69 end
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70 local full_filename = join_path(dirname, filename);
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71 local fh, ferr = io.open(full_filename, "w");
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72 if not fh then
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73 module:log("error", "Could not open file %s for upload: %s", full_filename, ferr);
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74 return 500;
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75 end
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76 local ok, err = fh:write(event.request.body);
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77 if not ok then
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78 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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79 os.remove(full_filename);
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80 return 500;
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81 end
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82 ok, err = fh:close();
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83 if not ok then
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84 module:log("error", "Could not write to file %s for upload: %s", full_filename, err);
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85 os.remove(full_filename);
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86 return 500;
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87 end
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88 module:log("info", "File uploaded by %s to slot %s", pending_slots[path], random);
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89 pending_slots[path] = nil;
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90 return 200;
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91 end
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92
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93 local serve_uploaded_files = module:depends("http_files").serve(storage_path);
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94
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95 local function size_only(request, data)
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96 request.headers.content_size = #data;
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97 return 200;
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98 end
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99
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100 local function serve_head(event, path)
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101 event.send = size_only;
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102 return serve_uploaded_files(event, path);
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103 end
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104
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105 module:provides("http", {
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106 route = {
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107 ["GET /*"] = serve_uploaded_files;
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108 ["HEAD /*"] = serve_head;
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109 ["PUT /*"] = upload_data;
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110 };
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111 });