Sat, 06 Nov 2010 01:08:30 +0500
util.httpstream: A little refactoring of the coroutine control flow.
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1 | -- Copyright (C) 2009-2010 Florian Zeitz |
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2 | -- |
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3 | -- This file is MIT/X11 licensed. Please see the |
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4 | -- COPYING file in the source package for more information. |
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5 | -- |
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6 | |
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7 | local st, uuid = require "util.stanza", require "util.uuid"; |
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8 | |
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9 | local xmlns_cmd = "http://jabber.org/protocol/commands"; |
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10 | |
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11 | local states = {} |
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12 | |
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13 | local _M = {}; |
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14 | |
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15 | function _cmdtag(desc, status, sessionid, action) |
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16 | local cmd = st.stanza("command", { xmlns = xmlns_cmd, node = desc.node, status = status }); |
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17 | if sessionid then cmd.attr.sessionid = sessionid; end |
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18 | if action then cmd.attr.action = action; end |
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19 | |
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20 | return cmd; |
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21 | end |
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22 | |
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23 | function _M.new(name, node, handler, permission) |
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24 | return { name = name, node = node, handler = handler, cmdtag = _cmdtag, permission = (permission or "user") }; |
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25 | end |
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26 | |
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27 | function _M.handle_cmd(command, origin, stanza) |
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28 | local sessionid = stanza.tags[1].attr.sessionid or uuid.generate(); |
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29 | local dataIn = {}; |
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30 | dataIn.to = stanza.attr.to; |
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31 | dataIn.from = stanza.attr.from; |
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32 | dataIn.action = stanza.tags[1].attr.action or "execute"; |
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33 | dataIn.form = stanza.tags[1]:child_with_ns("jabber:x:data"); |
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34 | |
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35 | local data, state = command:handler(dataIn, states[sessionid]); |
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36 | states[sessionid] = state; |
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37 | local stanza = st.reply(stanza); |
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38 | if data.status == "completed" then |
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39 | states[sessionid] = nil; |
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40 | cmdtag = command:cmdtag("completed", sessionid); |
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41 | elseif data.status == "canceled" then |
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42 | states[sessionid] = nil; |
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43 | cmdtag = command:cmdtag("canceled", sessionid); |
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44 | elseif data.status == "error" then |
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45 | states[sessionid] = nil; |
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46 | stanza = st.error_reply(stanza, data.error.type, data.error.condition, data.error.message); |
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47 | origin.send(stanza); |
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48 | return true; |
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49 | else |
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50 | cmdtag = command:cmdtag("executing", sessionid); |
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51 | end |
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52 | |
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53 | for name, content in pairs(data) do |
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54 | if name == "info" then |
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55 | cmdtag:tag("note", {type="info"}):text(content):up(); |
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56 | elseif name == "warn" then |
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57 | cmdtag:tag("note", {type="warn"}):text(content):up(); |
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58 | elseif name == "error" then |
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59 | cmdtag:tag("note", {type="error"}):text(content.message):up(); |
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60 | elseif name =="actions" then |
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61 | local actions = st.stanza("actions"); |
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62 | for _, action in ipairs(content) do |
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63 | if (action == "prev") or (action == "next") or (action == "complete") then |
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64 | actions:tag(action):up(); |
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65 | else |
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66 | module:log("error", 'Command "'..command.name.. |
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67 | '" at node "'..command.node..'" provided an invalid action "'..action..'"'); |
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68 | end |
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69 | end |
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70 | cmdtag:add_child(actions); |
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71 | elseif name == "form" then |
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72 | cmdtag:add_child((content.layout or content):form(content.values)); |
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73 | elseif name == "result" then |
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74 | cmdtag:add_child((content.layout or content):form(content.values, "result")); |
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75 | elseif name == "other" then |
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76 | cmdtag:add_child(content); |
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77 | end |
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78 | end |
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79 | stanza:add_child(cmdtag); |
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80 | origin.send(stanza); |
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81 | |
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82 | return true; |
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83 | end |
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84 | |
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85 | return _M; |