forked from mirror/logrus
some minimal documentation for Logger.Writer{,Level}
This also includes two examples extracted from the readme.
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@ -6,10 +6,16 @@ import (
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"runtime"
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)
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// Writer at INFO level. See WriterLevel for details.
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func (logger *Logger) Writer() *io.PipeWriter {
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return logger.WriterLevel(InfoLevel)
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}
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// WriterLevel returns an io.Writer that can be used to write arbitrary text to
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// the logger at the given log level. Each line written to the writer will be
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// printed in the usual way using formatters and hooks. The writer is part of an
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// io.Pipe and it is the callers responsibility to close the writer when done.
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// This can be used to override the standard library logger easily.
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func (logger *Logger) WriterLevel(level Level) *io.PipeWriter {
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return NewEntry(logger).WriterLevel(level)
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}
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@ -0,0 +1,34 @@
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package logrus_test
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import (
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"log"
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"net/http"
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"github.com/sirupsen/logrus"
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)
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func ExampleLogger_Writer_httpServer() {
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logger := logrus.New()
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w := logger.Writer()
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defer w.Close()
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srv := http.Server{
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// create a stdlib log.Logger that writes to
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// logrus.Logger.
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ErrorLog: log.New(w, "", 0),
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}
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if err := srv.ListenAndServe(); err != nil {
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logger.Fatal(err)
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}
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}
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func ExampleLogger_Writer_stdlib() {
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logger := logrus.New()
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logger.Formatter = &logrus.JSONFormatter{}
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// Use logrus for standard log output
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// Note that `log` here references stdlib's log
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// Not logrus imported under the name `log`.
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log.SetOutput(logger.Writer())
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}
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