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mod_sentry/README.md

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author Kim Alvefur <zash@zash.se>
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1 ---
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2 labels:
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3 - 'Stage-Beta'
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4 summary: 'Send errors to a Sentry server'
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5 rockspec:
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6 build:
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7 modules:
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8 mod_sentry.sentry: sentry.lib.lua
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9 ---
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10
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11 # Introduction
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12
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13 This module forwards select events to a [Sentry](https://sentry.io/) server.
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14
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15 # Configuration
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16
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17 There is a single configuration option, `sentry`, which should be a table
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18 containing the following parameters (optional unless otherwise stated):
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19
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20 `dsn`
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21 : **Required.** The DSN of the project in Sentry.
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22
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23 `insecure`
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24 : Whether to allow untrusted HTTPS certificates.
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25
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26 `server_name`
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27 : The name of the current server (defaults to the system hostname).
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28
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29 `tags`
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30 : An optional table of tags that will be used as the default for all
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31 events from this module.
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32
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33 `extra`
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34 : An optional table of custom extra data to attach to all events from
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35 this module.
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36
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37 Example configuration:
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38
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39 ```
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40 sentry = {
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41 dsn = "https://37iNFnR4tferFhoTPNe8X0@example.com/11";
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42 tags = {
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43 environment = "prod";
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44 };
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45 }
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46 ```
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47
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48 ## Log forwarding
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49
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50 You can configure log messages to be automatically forwarded to Sentry.
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51 This example will send all "warn" and "error" messages to Sentry, while
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52 sending all "info" and higher messages to syslog:
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53
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54 ```
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55 log = {
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56 info = "*syslog";
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57 { levels = "warn", to = "sentry" };
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58 }
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59 ```
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60
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61 # Developers
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62
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63 In addition to the automatic log forwarder, you can integrate Sentry
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64 forwarding directly into modules using the API.
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65
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66 ## API
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67
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68 Usage example:
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69
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70 ```
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71 local sentry = module:depends("sentry").new({
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72 logger = module.name;
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73 });
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74
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75 sentry:event("warning")
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76 :message("This is a sample warning")
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77 :send();
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78 ```
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79
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80 ### Events
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81
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82 Event objects have a number of methods you can call to add data to them.
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83 All methods return the event itself, which means you can chain multiple
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84 calls together for convenience.
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85
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86 After attaching all the data you want to include in the event, simply
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87 call `event:send()` to submit it to the server.
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88
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89 #### set(key, value)
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90
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91 Directly set a property of the event to the given value.
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92
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93 #### tag(name, value)
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94
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95 Set the specified tag to the given value.
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96
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97 May also be called with a table of key/value pairs.
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98
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99 #### extra(name, value)
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100
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101 Sets the specified 'extra' data. May also be called
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102 with a table of key/value pairs.
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103
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104 #### message(text)
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105
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106 Sets the message text associated with the event.
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107
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108 #### set_request(request)
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109
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110 Sets the HTTP request associated with the event.
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111
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112 This is used to indicate what incoming HTTP request
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113 was being processed at the time of the event.
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114
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115 #### add_exception(e)
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116
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117 Accepts an error object (from util.error or any arbitrary value)
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118 and attempts to map it to a Sentry exception.
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119
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120 May be called multiple times on the same event, to represent
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121 nested exceptions (the outermost exception should be added first).
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122
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123 #### add_breadcrumb(timestamp, type, category, message, data)
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124
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125 Add a breadcrumb to the event. A breadcrumb represents any useful
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126 piece of information that led up to the event. See Sentry documentation
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127 for allowable types and categories.
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128
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129 #### add_http_request_breadcrumb(request, message)
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130
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131 Helper to add a breadcrumb representing a HTTP request that was made.
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132
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133 The `message` parameter is an optional human-readable text description
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134 of the request.
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135
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136 #### send()
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137
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138 Sends the event to the Sentry server. Returns a promise that resolves
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139 to the response from the server.