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Vendor libs
This commit is contained in:
Wim
288
vendor/github.com/alecthomas/log4go/config.go
generated
vendored
Normal file
288
vendor/github.com/alecthomas/log4go/config.go
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vendored
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@@ -0,0 +1,288 @@
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// Copyright (C) 2010, Kyle Lemons <kyle@kylelemons.net>. All rights reserved.
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package log4go
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import (
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"encoding/xml"
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"fmt"
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"io/ioutil"
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"os"
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"strconv"
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"strings"
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)
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type xmlProperty struct {
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Name string `xml:"name,attr"`
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Value string `xml:",chardata"`
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}
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type xmlFilter struct {
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Enabled string `xml:"enabled,attr"`
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Tag string `xml:"tag"`
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Level string `xml:"level"`
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Type string `xml:"type"`
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Property []xmlProperty `xml:"property"`
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}
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type xmlLoggerConfig struct {
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Filter []xmlFilter `xml:"filter"`
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}
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// Load XML configuration; see examples/example.xml for documentation
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func (log Logger) LoadConfiguration(filename string) {
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log.Close()
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// Open the configuration file
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fd, err := os.Open(filename)
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if err != nil {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Could not open %q for reading: %s\n", filename, err)
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os.Exit(1)
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}
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contents, err := ioutil.ReadAll(fd)
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if err != nil {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Could not read %q: %s\n", filename, err)
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os.Exit(1)
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}
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xc := new(xmlLoggerConfig)
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if err := xml.Unmarshal(contents, xc); err != nil {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Could not parse XML configuration in %q: %s\n", filename, err)
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os.Exit(1)
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}
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for _, xmlfilt := range xc.Filter {
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var filt LogWriter
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var lvl Level
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bad, good, enabled := false, true, false
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// Check required children
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if len(xmlfilt.Enabled) == 0 {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required attribute %s for filter missing in %s\n", "enabled", filename)
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bad = true
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} else {
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enabled = xmlfilt.Enabled != "false"
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}
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if len(xmlfilt.Tag) == 0 {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required child <%s> for filter missing in %s\n", "tag", filename)
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bad = true
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}
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if len(xmlfilt.Type) == 0 {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required child <%s> for filter missing in %s\n", "type", filename)
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bad = true
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}
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if len(xmlfilt.Level) == 0 {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required child <%s> for filter missing in %s\n", "level", filename)
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bad = true
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}
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switch xmlfilt.Level {
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case "FINEST":
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lvl = FINEST
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case "FINE":
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lvl = FINE
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case "DEBUG":
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lvl = DEBUG
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case "TRACE":
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lvl = TRACE
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case "INFO":
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lvl = INFO
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case "WARNING":
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lvl = WARNING
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case "ERROR":
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lvl = ERROR
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case "CRITICAL":
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lvl = CRITICAL
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default:
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required child <%s> for filter has unknown value in %s: %s\n", "level", filename, xmlfilt.Level)
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bad = true
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}
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// Just so all of the required attributes are errored at the same time if missing
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if bad {
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os.Exit(1)
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}
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switch xmlfilt.Type {
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case "console":
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filt, good = xmlToConsoleLogWriter(filename, xmlfilt.Property, enabled)
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case "file":
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filt, good = xmlToFileLogWriter(filename, xmlfilt.Property, enabled)
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case "xml":
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filt, good = xmlToXMLLogWriter(filename, xmlfilt.Property, enabled)
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case "socket":
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filt, good = xmlToSocketLogWriter(filename, xmlfilt.Property, enabled)
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default:
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Could not load XML configuration in %s: unknown filter type \"%s\"\n", filename, xmlfilt.Type)
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os.Exit(1)
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}
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// Just so all of the required params are errored at the same time if wrong
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if !good {
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os.Exit(1)
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}
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// If we're disabled (syntax and correctness checks only), don't add to logger
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if !enabled {
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continue
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}
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log[xmlfilt.Tag] = &Filter{lvl, filt}
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}
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}
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func xmlToConsoleLogWriter(filename string, props []xmlProperty, enabled bool) (*ConsoleLogWriter, bool) {
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// Parse properties
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for _, prop := range props {
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switch prop.Name {
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default:
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Warning: Unknown property \"%s\" for console filter in %s\n", prop.Name, filename)
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}
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}
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// If it's disabled, we're just checking syntax
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if !enabled {
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return nil, true
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}
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return NewConsoleLogWriter(), true
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}
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// Parse a number with K/M/G suffixes based on thousands (1000) or 2^10 (1024)
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func strToNumSuffix(str string, mult int) int {
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num := 1
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if len(str) > 1 {
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switch str[len(str)-1] {
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case 'G', 'g':
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num *= mult
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fallthrough
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case 'M', 'm':
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num *= mult
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fallthrough
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case 'K', 'k':
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num *= mult
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str = str[0 : len(str)-1]
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}
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}
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parsed, _ := strconv.Atoi(str)
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return parsed * num
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}
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func xmlToFileLogWriter(filename string, props []xmlProperty, enabled bool) (*FileLogWriter, bool) {
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file := ""
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format := "[%D %T] [%L] (%S) %M"
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maxlines := 0
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maxsize := 0
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daily := false
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rotate := false
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// Parse properties
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for _, prop := range props {
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switch prop.Name {
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case "filename":
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file = strings.Trim(prop.Value, " \r\n")
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case "format":
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format = strings.Trim(prop.Value, " \r\n")
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case "maxlines":
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maxlines = strToNumSuffix(strings.Trim(prop.Value, " \r\n"), 1000)
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case "maxsize":
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maxsize = strToNumSuffix(strings.Trim(prop.Value, " \r\n"), 1024)
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case "daily":
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daily = strings.Trim(prop.Value, " \r\n") != "false"
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case "rotate":
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rotate = strings.Trim(prop.Value, " \r\n") != "false"
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default:
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Warning: Unknown property \"%s\" for file filter in %s\n", prop.Name, filename)
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}
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}
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// Check properties
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if len(file) == 0 {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required property \"%s\" for file filter missing in %s\n", "filename", filename)
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return nil, false
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}
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// If it's disabled, we're just checking syntax
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if !enabled {
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return nil, true
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}
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flw := NewFileLogWriter(file, rotate)
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flw.SetFormat(format)
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flw.SetRotateLines(maxlines)
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flw.SetRotateSize(maxsize)
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flw.SetRotateDaily(daily)
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return flw, true
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}
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func xmlToXMLLogWriter(filename string, props []xmlProperty, enabled bool) (*FileLogWriter, bool) {
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file := ""
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maxrecords := 0
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maxsize := 0
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daily := false
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rotate := false
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// Parse properties
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for _, prop := range props {
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switch prop.Name {
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case "filename":
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file = strings.Trim(prop.Value, " \r\n")
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case "maxrecords":
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maxrecords = strToNumSuffix(strings.Trim(prop.Value, " \r\n"), 1000)
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case "maxsize":
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maxsize = strToNumSuffix(strings.Trim(prop.Value, " \r\n"), 1024)
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case "daily":
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daily = strings.Trim(prop.Value, " \r\n") != "false"
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case "rotate":
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rotate = strings.Trim(prop.Value, " \r\n") != "false"
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default:
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Warning: Unknown property \"%s\" for xml filter in %s\n", prop.Name, filename)
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}
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}
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// Check properties
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if len(file) == 0 {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required property \"%s\" for xml filter missing in %s\n", "filename", filename)
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return nil, false
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}
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// If it's disabled, we're just checking syntax
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if !enabled {
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return nil, true
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}
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xlw := NewXMLLogWriter(file, rotate)
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xlw.SetRotateLines(maxrecords)
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xlw.SetRotateSize(maxsize)
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xlw.SetRotateDaily(daily)
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return xlw, true
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}
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func xmlToSocketLogWriter(filename string, props []xmlProperty, enabled bool) (SocketLogWriter, bool) {
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endpoint := ""
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protocol := "udp"
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// Parse properties
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for _, prop := range props {
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switch prop.Name {
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case "endpoint":
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endpoint = strings.Trim(prop.Value, " \r\n")
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case "protocol":
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protocol = strings.Trim(prop.Value, " \r\n")
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default:
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Warning: Unknown property \"%s\" for file filter in %s\n", prop.Name, filename)
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}
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}
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// Check properties
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if len(endpoint) == 0 {
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fmt.Fprintf(os.Stderr, "LoadConfiguration: Error: Required property \"%s\" for file filter missing in %s\n", "endpoint", filename)
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return nil, false
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}
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// If it's disabled, we're just checking syntax
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if !enabled {
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return nil, true
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}
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return NewSocketLogWriter(protocol, endpoint), true
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}
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