prosody
2d38242a08dd
util/error.lua

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util/error.lua @ 11121:2d38242a08dd

make: Add way to run individual tests
author Kim Alvefur <zash@zash.se>
date Fri, 02 Oct 2020 16:35:05 +0200
parent 11102:5a0ff475ecfd
child 11161:f51ed2652602
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11075
d8fad2b48b05 util.error: Add unique 'instance_id' to error objects
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1 local id = require "util.id";
11051
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2
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3 -- Library configuration (see configure())
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4 local auto_inject_traceback = false;
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5 local display_tracebacks = false;
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6
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7
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8 local error_mt = { __name = "error" };
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9
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10 function error_mt:__tostring()
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11 if display_tracebacks and self.context.traceback then
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12 return ("error<%s:%s:%s:%s>"):format(self.type, self.condition, self.text or "", self.context.traceback);
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13 end
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14 return ("error<%s:%s:%s>"):format(self.type, self.condition, self.text or "");
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15 end
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16
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17 local function is_err(e)
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18 return getmetatable(e) == error_mt;
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19 end
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20
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21 local function configure(opt)
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22 if opt.display_tracebacks ~= nil then
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23 display_tracebacks = opt.display_tracebacks;
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24 end
11050
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25 if opt.auto_inject_traceback ~= nil then
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26 auto_inject_traceback = opt.auto_inject_traceback;
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27 end
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28 end
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29
10493
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30 -- Do we want any more well-known fields?
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31 -- Or could we just copy all fields from `e`?
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32 -- Sometimes you want variable details in the `text`, how to handle that?
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33 -- Translations?
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34 -- Should the `type` be restricted to the stanza error types or free-form?
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35 -- What to set `type` to for stream errors or SASL errors? Those don't have a 'type' attr.
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36
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37 local function new(e, context, registry, source)
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38 local template = registry and registry[e];
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39 if not template then
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40 if type(e) == "table" then
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41 template = {
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42 code = e.code;
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43 type = e.type;
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44 condition = e.condition;
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45 text = e.text;
11081
0b68697450c5 util.error: Add well-known field 'extra'
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46 extra = e.extra;
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47 };
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48 else
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49 template = {};
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50 end
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51 end
11076
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52 context = context or {};
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53
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54 if auto_inject_traceback then
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55 context.traceback = debug.traceback("error stack", 2);
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56 end
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57
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58 local error_instance = setmetatable({
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59 instance_id = id.short();
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60
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61 type = template.type or "cancel";
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62 condition = template.condition or "undefined-condition";
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63 text = template.text;
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64 code = template.code;
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65 extra = template.extra;
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66
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67 context = context;
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68 source = source;
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69 }, error_mt);
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70
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71 return error_instance;
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72 end
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73
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74 -- compact --> normal form
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75 local function expand_registry(namespace, registry)
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76 local mapped = {}
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77 for err,template in pairs(registry) do
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78 local e = {
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79 type = template[1];
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80 condition = template[2];
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81 text = template[3];
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82 };
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83 if namespace and template[4] then
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84 e.extra = { namespace = namespace, condition = template[4] };
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85 end
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86 mapped[err] = e;
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87 end
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88 return mapped;
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89 end
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90
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91 local function init(source, namespace, registry)
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92 if type(namespace) == "table" then
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93 -- registry can be given as second argument if namespace is either not used
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94 registry, namespace = namespace, nil;
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95 end
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96 local _, protoerr = next(registry, nil);
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97 if protoerr and type(next(protoerr)) == "number" then
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98 registry = expand_registry(namespace, registry);
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99 end
11078
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100 return {
11098
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101 source = source;
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102 registry = registry;
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103 new = function (e, context)
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104 return new(e, context, registry, source);
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105 end;
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106 };
11054
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107 end
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108
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109 local function coerce(ok, err, ...)
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110 if ok or is_err(err) then
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111 return ok, err, ...;
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112 end
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113
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114 local new_err = new({
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115 type = "cancel", condition = "undefined-condition"
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116 }, { wrapped_error = err });
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117
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118 return ok, new_err, ...;
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119 end
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120
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121 local function from_stanza(stanza, context, source)
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122 local error_type, condition, text, extra_tag = stanza:get_error();
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123 local error_tag = stanza:get_child("error");
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124 context = context or {};
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125 context.stanza = stanza;
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126 context.by = error_tag.attr.by or stanza.attr.from;
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127
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128 local uri;
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129 if condition == "gone" or condition == "redirect" then
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130 uri = error_tag:get_child_text(condition, "urn:ietf:params:xml:ns:xmpp-stanzas");
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131 end
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132
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133 return new({
9749
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134 type = error_type or "cancel";
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135 condition = condition or "undefined-condition";
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136 text = text;
11095
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137 extra = (extra_tag or uri) and {
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138 uri = uri;
11092
bd13aa89262d util.error: Collect Application-Specific Conditions from stanza errors
Kim Alvefur <zash@zash.se>
parents: 11091
diff changeset
139 tag = extra_tag;
11091
4b4b5188492f util.error: Add special case handling of <gone> with an URI
Kim Alvefur <zash@zash.se>
parents: 11090
diff changeset
140 } or nil;
11094
03fdf41fd948 util.error: Pass converted stanza errors throguh new()
Kim Alvefur <zash@zash.se>
parents: 11092
diff changeset
141 }, context, nil, source);
9749
9361bd1b9c9b util.error: Add a function for creating an error object from an error stanza
Kim Alvefur <zash@zash.se>
parents: 9746
diff changeset
142 end
9361bd1b9c9b util.error: Add a function for creating an error object from an error stanza
Kim Alvefur <zash@zash.se>
parents: 9746
diff changeset
143
9746
848fd204708c util.error: Add new util library for structured errors
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
144 return {
848fd204708c util.error: Add new util library for structured errors
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
145 new = new;
11054
ad07152d7bde util.error: Add a wrapper for common parameters
Kim Alvefur <zash@zash.se>
parents: 11053
diff changeset
146 init = init;
9746
848fd204708c util.error: Add new util library for structured errors
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
147 coerce = coerce;
848fd204708c util.error: Add new util library for structured errors
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parents:
diff changeset
148 is_err = is_err;
9749
9361bd1b9c9b util.error: Add a function for creating an error object from an error stanza
Kim Alvefur <zash@zash.se>
parents: 9746
diff changeset
149 from_stanza = from_stanza;
11050
51be24b16e8a util.error: Allow optional tracebacks to be injected on errors
Matthew Wild <mwild1@gmail.com>
parents: 10501
diff changeset
150 configure = configure;
9746
848fd204708c util.error: Add new util library for structured errors
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151 }