prosody-modules
ff3ea8735d61
mod_xml_status/mod_xml_status.lua

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mod_xml_status/mod_xml_status.lua @ 524:ff3ea8735d61

mod_xml_status: initial commit. Expose server status in xml format to be used on external webapps.
author Marco Cirillo <maranda@lightwitch.org>
date Fri, 06 Jan 2012 23:15:51 +0000
child 525:a9cd75cc9563
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524
ff3ea8735d61 mod_xml_status: initial commit. Expose server status in xml format to be used on external webapps.
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1 -- (C) 2011, Marco Cirillo (LW.Org)
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2 -- Display server stats in readable XML format
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3
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4 module:set_global()
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5
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6 local ports = module:get_option_array("xml_status_http_ports", {{ port = 5280 }})
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7 local show_hosts = module:get_option_array("xml_status_show_hosts", nil)
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8 local show_comps = module:get_option_array("xml_status_show_comps", nil)
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9
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10 local httpserver = require "net.httpserver"
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11
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12 -- code begin
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13
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14 if not prosody.stanza_counter and not show_hosts and not show_comps then
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15 module:log ("error", "mod_xml_status requires at least one of the following things:")
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16 module:log ("error", "mod_stanza_counter loaded, or either xml_status_show_hosts or xml_status_show_comps configuration values set.")
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17 module:log ("error", "check the module wiki at: http://code.google.com/p/prosody-modules/wiki/mod_xml_status")
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18 return false
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19 end
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20
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21 local r_err = "\n<html>\n<head>\n<title>Prosody's XML Status - Error %s</title>\n<meta name=\"robots\" content=\"noindex, nofollow\" />\n</head>\n\n<body>\n<h3>%s</h3>\n</body>\n\n</html>\n"
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22
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23 local response_table = {}
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24 response_table.header = '<?xml version="1.0" encoding="UTF-8" ?>'
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25 response_table.doc_header = '<document>'
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26 response_table.doc_closure = '</document>'
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27 response_table.stanzas = {
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28 elem_header = ' <stanzas>', elem_closure = ' </stanzas>',
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29 incoming = ' <incoming iq="%d" message="%d" presence="%d" />',
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30 outgoing = ' <outgoing iq="%d" message="%d" presence="%d" />'
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31 }
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32 response_table.hosts = {
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33 elem_header = ' <hosts>', elem_closure = ' </hosts>',
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34 status = ' <status name="%s" current="%s" />'
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35 }
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36 response_table.comps = {
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37 elem_header = ' <components>', elem_closure = ' </components>',
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38 status = ' <status name="%s" current="%s" />'
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39 }
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40
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41 local function forge_response()
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42 local hosts_s = {}; local components = {}; local stats = {}; local hosts_stats = {}; local comps_stats = {}
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43
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44 -- add headers
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45 local result = {}; result[#result+1] = response_table.header; result[#result+1] = response_table.doc_header
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46
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47 if show_hosts then for _, name in ipairs(show_hosts) do hosts_s[#hosts_s+1] = name end end
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48 if show_comps then for _, name in ipairs(show_comps) do components[#components+1] = name end end
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49
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50 -- build stanza stats if there
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51 if prosody.stanza_counter then
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52 stats[1] = response_table.stanzas.elem_header
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53 stats[2] = response_table.stanzas.incoming:format(prosody.stanza_counter.iq["incoming"],
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54 prosody.stanza_counter.message["incoming"],
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55 prosody.stanza_counter.presence["incoming"])
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56 stats[3] = response_table.stanzas.outgoing:format(prosody.stanza_counter.iq["outgoing"],
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57 prosody.stanza_counter.message["outgoing"],
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58 prosody.stanza_counter.presence["outgoing"])
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59 stats[4] = response_table.stanzas.elem_closure
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60 end
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61
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62 -- build hosts stats if there
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63 if hosts_s[1] then
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64 hosts_stats[1] = response_table.hosts.elem_header
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65 for _, name in ipairs(hosts_s) do
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66 hosts_stats[#hosts_stats+1] = response_table.hosts.status:format(
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67 name, hosts[name] and "online" or "offline")
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68 end
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69 hosts_stats[#hosts_stats+1] = response_table.hosts.elem_closure
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70 end
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71
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72 -- build components stats if there
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73 if components[1] then
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74 comps_stats[1] = response_table.comps.elem_header
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75 for _, name in ipairs(components) do
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76 comps_stats[#comps_stats+1] = response_table.comps.status:format(
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77 name, hosts[name].modules.component and hosts[name].modules.component.connected and "online" or
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78 hosts[name] and hosts[name].modules.component == nil and "online" or "offline")
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79 end
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80 comps_stats[#comps_stats+1] = response_table.comps.elem_closure
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81 end
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82
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83 -- finish building xml stats document
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84 for _, bstring in ipairs(stats) do result[#result+1] = bstring end
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85 for _, bstring in ipairs(hosts_stats) do result[#result+1] = bstring end
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86 for _, bstring in ipairs(comps_stats) do result[#result+1] = bstring end
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87 result[#result+1] = response_table.doc_closure
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88
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89 return table.concat(result, "\n")
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90 end
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91
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92 -- http handlers
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93
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94 local function response(code, r, h)
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95 local response = {
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96 status = code;
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97 body = r;
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98 }
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99
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100 if h then response.headers = h; end
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101 return response
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102 end
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103
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104 local function request(method, body, request)
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105 if not prosody.stanza_counter then
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106 local err500 = r_err:format("500", "Internal server error")
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107 return response(500, err500) end
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108 if method == "GET" then
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109 return response(200, forge_response())
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110 else
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111 local err405 = r_err:format("405", "Only GET is supported")
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112 return response(405, err405, {["Allow"] = "GET"})
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113 end
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114 end
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115
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116 -- initialization.
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117 -- init http interface
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118 local function setup()
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119 httpserver.new_from_config(ports, request, { base = "xml-status" })
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120 end
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121
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122 if prosody.start_time then
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123 setup();
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124 else
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125 module:hook("server-started", setup);
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126 end