Mercurial > prosody-modules

annotate mod_log_ringbuffer/mod_log_ringbuffer.lua @ 4989:b74d592df9e2

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mod_http_muc_log: Remove dead code This might be something left over since a different variant where the loop went like `for n = i-1, i-100, -1 do ... end` i.e. it went trough a fixed number of items instead of all the page until the current message. Then it would have needed something to stop going over the end, but since the checks are simple it shouldn't be much of a problem looping over even a very busy day.
author Kim Alvefur <zash@zash.se>
date Tue, 16 Aug 2022 01:27:59 +0200
parents df2ccb42a241
children 133b23758cf6
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1 module:set_global();
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2
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3 local loggingmanager = require "core.loggingmanager";
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4 local format = require "util.format".format;
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5 local pposix = require "util.pposix";
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6 local rb = require "util.ringbuffer";
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7 local queue = require "util.queue";
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8
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9 local default_timestamp = "%b %d %H:%M:%S ";
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10 local max_chunk_size = module:get_option_number("log_ringbuffer_chunk_size", 16384);
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11
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12 local os_date = os.date;
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13
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14 local default_filename_template = "{paths.data}/ringbuffer-logs-{pid}-{count}.log";
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15 local render_filename = require "util.interpolation".new("%b{}", function (s) return s; end, {
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16 yyyymmdd = function (t)
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17 return os_date("%Y%m%d", t);
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18 end;
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19 hhmmss = function (t)
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20 return os_date("%H%M%S", t);
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21 end;
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22 });
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23
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24 local dump_count = 0;
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25
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26 local function dump_buffer(dump, filename)
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27 dump_count = dump_count + 1;
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28 local f, err = io.open(filename, "a+");
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29 if not f then
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30 module:log("error", "Unable to open output file: %s", err);
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31 return;
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32 end
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33 f:write(("-- Dumping log buffer at %s --\n"):format(os_date(default_timestamp)));
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34 dump(f);
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35 f:write("-- End of dump --\n\n");
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36 f:close();
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37 end
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38
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39 local function get_filename(filename_template)
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40 filename_template = filename_template or default_filename_template;
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41 return render_filename(filename_template, {
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42 paths = prosody.paths;
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43 pid = pposix.getpid();
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44 count = dump_count;
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45 time = os.time();
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46 });
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47 end
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48
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49 local function new_buffer(config)
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50 local write, dump;
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51
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52 if config.lines then
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53 local buffer = queue.new(config.lines, true);
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54 function write(line)
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55 buffer:push(line);
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56 end
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57 function dump(f)
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58 -- COMPAT w/0.11 - update to use :consume()
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59 for line in buffer.pop, buffer do
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60 f:write(line);
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61 end
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62 end
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63 else
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64 local buffer_size = config.size or 100*1024;
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65 local buffer = rb.new(buffer_size);
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66 function write(line)
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67 if not buffer:write(line) then
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68 if #line > buffer_size then
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69 buffer:discard(buffer_size);
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70 buffer:write(line:sub(-buffer_size));
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71 else
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72 buffer:discard(#line);
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73 buffer:write(line);
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74 end
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75 end
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76 end
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77 function dump(f)
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78 local bytes_remaining = buffer:length();
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79 while bytes_remaining > 0 do
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80 local chunk_size = math.min(bytes_remaining, max_chunk_size);
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81 local chunk = buffer:read(chunk_size);
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82 if not chunk then
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83 return;
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84 end
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85 f:write(chunk);
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86 bytes_remaining = bytes_remaining - chunk_size;
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87 end
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88 end
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89 end
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90 return write, dump;
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91 end
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92
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93 local function ringbuffer_log_sink_maker(sink_config)
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94 local write, dump = new_buffer(sink_config);
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95
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96 local timestamps = sink_config.timestamps;
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97
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98 if timestamps == true or timestamps == nil then
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99 timestamps = default_timestamp; -- Default format
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100 elseif timestamps then
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101 timestamps = timestamps .. " ";
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102 end
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103
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104 local function handler()
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105 dump_buffer(dump, sink_config.filename or get_filename(sink_config.filename_template));
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106 end
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107
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108 if sink_config.signal then
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109 require "util.signal".signal(sink_config.signal, handler);
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110 elseif sink_config.event then
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111 module:hook_global(sink_config.event, handler);
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112 end
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113
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114 return function (name, level, message, ...)
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115 local line = format("%s%s\t%s\t%s\n", timestamps and os_date(timestamps) or "", name, level, format(message, ...));
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116 write(line);
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117 end;
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118 end
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119
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120 loggingmanager.register_sink_type("ringbuffer", ringbuffer_log_sink_maker);