86 lines
2.2 KiB
Factor
86 lines
2.2 KiB
Factor
! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors peg peg.parsers memoize kernel sequences
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logging arrays words strings vectors io io.files
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io.encodings.utf8 namespaces make combinators logging.server
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calendar calendar.format ;
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IN: logging.parser
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TUPLE: log-entry date level word-name message ;
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: string-of ( quot -- parser )
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satisfy repeat0 [ >string ] action ; inline
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SYMBOL: multiline
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: 'date' ( -- parser )
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[ "]" member? not ] string-of [
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dup multiline-header =
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[ drop multiline ] [ rfc3339>timestamp ] if
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] action
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"[" "]" surrounded-by ;
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: 'log-level' ( -- parser )
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log-levels [
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[ name>> token ] keep [ nip ] curry action
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] map choice ;
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: 'word-name' ( -- parser )
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[ " :" member? not ] string-of ;
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SYMBOL: malformed
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: 'malformed-line' ( -- parser )
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[ drop t ] string-of
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[ log-entry new swap >>message malformed >>level ] action ;
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: 'log-message' ( -- parser )
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[ drop t ] string-of
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[ 1vector ] action ;
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: 'log-line' ( -- parser )
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[
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'date' ,
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" " token hide ,
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'log-level' ,
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" " token hide ,
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'word-name' ,
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": " token hide ,
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'log-message' ,
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] seq* [ first4 log-entry boa ] action
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'malformed-line' 2choice ;
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PEG: parse-log-line ( string -- entry ) 'log-line' ;
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: malformed? ( line -- ? )
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level>> malformed eq? ;
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: multiline? ( line -- ? )
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level>> multiline eq? ;
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: malformed-line ( line -- )
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"Warning: malformed log line:" print
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message>> print ;
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: add-multiline ( line -- )
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building get empty? [
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"Warning: log begins with multiline entry" print drop
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] [
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message>> first building get peek message>> push
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] if ;
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: parse-log ( lines -- entries )
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[
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[
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parse-log-line {
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{ [ dup malformed? ] [ malformed-line ] }
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{ [ dup multiline? ] [ add-multiline ] }
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[ , ]
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} cond
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] each
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] { } make ;
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: parse-log-file ( service -- entries )
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log-path 1 log# dup exists?
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[ utf8 file-lines parse-log ] [ drop f ] if ;
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