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1 | {-# LANGUAGE DeriveDataTypeable #-} |
2 | {-# LANGUAGE DeriveGeneric #-} | |
3 | {-# LANGUAGE OverloadedStrings #-} | |
8c9d965d | 4 | {-# LANGUAGE RecordWildCards #-} |
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6 | -- | Default formatting for Graylog messages, |
7 | -- see http://docs.graylog.org/en/latest/pages/gelf.html | |
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8 | module Graylog.Gelf where |
9 | ||
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10 | import Data.Aeson (ToJSON (..), Value (..), object, |
11 | toJSON, (.=)) | |
12 | import Data.HashMap.Strict (HashMap) | |
13 | import Data.Semigroup ((<>)) | |
14 | import Data.Text (Text) | |
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15 | import Data.Time |
16 | import Data.Typeable | |
8c9d965d | 17 | import GHC.Exts (toList) |
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18 | import GHC.Generics |
19 | ||
20 | data GELF | |
21 | = GELF | |
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22 | { _gelfVersion :: Version |
23 | , _gelfHost :: Text | |
24 | , _gelfShortMessage :: Text | |
25 | , _gelfFullMessage :: Maybe Text | |
26 | , _gelfTimestamp :: Maybe UTCTime | |
27 | , _gelfLevel :: Maybe SyslogLevel | |
28 | , _gelfLine :: Maybe Word | |
29 | , _gelfFile :: Maybe Text | |
8c9d965d | 30 | , _gelfMeta :: HashMap Text Text |
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31 | } |
32 | deriving (Show, Typeable, Generic) | |
33 | ||
34 | instance ToJSON GELF where | |
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35 | toJSON GELF{..} = object $ [ "version" .= _gelfVersion |
36 | , "host" .= _gelfHost | |
37 | , "short_message" .= _gelfShortMessage | |
38 | , "full_message" .= _gelfFullMessage | |
39 | , "timestamp" .= _gelfTimestamp | |
40 | , "level" .= _gelfLevel | |
41 | , "line" .= _gelfLine | |
42 | , "file" .= _gelfFile | |
43 | ] <> toList (String <$> _gelfMeta) | |
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44 | |
45 | -- | |
46 | ||
47 | data Version | |
48 | = Version1x1 | |
49 | deriving (Eq, Show, Typeable, Generic) | |
50 | ||
51 | instance ToJSON Version where | |
52 | toJSON Version1x1 = String "1.1" | |
53 | ||
54 | -- | |
55 | ||
56 | data SyslogLevel | |
57 | = Emergency | |
58 | | Alert | |
59 | | Critical | |
60 | | Error | |
61 | | Warning | |
62 | | Notice | |
63 | | Informational | |
64 | | Debug | |
65 | deriving (Eq, Ord, Show, Typeable, Generic) | |
66 | ||
67 | instance ToJSON SyslogLevel where | |
68 | toJSON Emergency = Number 0 | |
69 | toJSON Alert = Number 1 | |
70 | toJSON Critical = Number 2 | |
71 | toJSON Error = Number 3 | |
72 | toJSON Warning = Number 4 | |
73 | toJSON Notice = Number 5 | |
74 | toJSON Informational = Number 6 | |
75 | toJSON Debug = Number 7 | |
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76 | |
77 | -- | |
78 | ||
79 | simpleGelf | |
80 | :: Text -- ^ Hostname | |
81 | -> Text -- ^ Short message | |
82 | -> GELF | |
83 | simpleGelf host short = | |
8c9d965d | 84 | GELF Version1x1 host short Nothing Nothing Nothing Nothing Nothing mempty |