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package logger
// Get all handlers based on the Config (if available)
import (
"fmt"
"github.com/revel/config"
"log"
"os"
"path/filepath"
"strings"
)
func InitializeFromConfig(basePath string, config *config.Context) (c *CompositeMultiHandler) {
// If running in test mode suppress anything that is not an error
if config != nil && config.BoolDefault(TEST_MODE_FLAG, false) {
// Preconfigure all the options
config.SetOption("log.info.output", "none")
config.SetOption("log.debug.output", "none")
config.SetOption("log.warn.output", "none")
config.SetOption("log.error.output", "stderr")
config.SetOption("log.crit.output", "stderr")
}
// If the configuration has an all option we can skip some
c, _ = NewCompositeMultiHandler()
// Filters are assigned first, non filtered items override filters
if config != nil && !config.BoolDefault(TEST_MODE_FLAG, false) {
initAllLog(c, basePath, config)
}
initLogLevels(c, basePath, config)
if c.CriticalHandler == nil && c.ErrorHandler != nil {
c.CriticalHandler = c.ErrorHandler
}
if config != nil && !config.BoolDefault(TEST_MODE_FLAG, false) {
initFilterLog(c, basePath, config)
if c.CriticalHandler == nil && c.ErrorHandler != nil {
c.CriticalHandler = c.ErrorHandler
}
initRequestLog(c, basePath, config)
}
return c
}
// Init the log.all configuration options
func initAllLog(c *CompositeMultiHandler, basePath string, config *config.Context) {
if config != nil {
extraLogFlag := config.BoolDefault(SPECIAL_USE_FLAG, false)
if output, found := config.String("log.all.output"); found {
// Set all output for the specified handler
if extraLogFlag {
log.Printf("Adding standard handler for levels to >%s< ", output)
}
initHandlerFor(c, output, basePath, NewLogOptions(config, true, nil, LvlAllList...))
}
}
}
// Init the filter options
// log.all.filter ....
// log.error.filter ....
func initFilterLog(c *CompositeMultiHandler, basePath string, config *config.Context) {
if config != nil {
extraLogFlag := config.BoolDefault(SPECIAL_USE_FLAG, false)
for _, logFilter := range logFilterList {
// Init for all filters
for _, name := range []string{"all", "debug", "info", "warn", "error", "crit",
"trace", // TODO trace is deprecated
} {
optionList := config.Options(logFilter.LogPrefix + name + logFilter.LogSuffix)
for _, option := range optionList {
splitOptions := strings.Split(option, ".")
keyMap := map[string]interface{}{}
for x := 3; x < len(splitOptions); x += 2 {
keyMap[splitOptions[x]] = splitOptions[x+1]
}
phandler := logFilter.parentHandler(keyMap)
if extraLogFlag {
log.Printf("Adding key map handler %s %s output %s", option, name, config.StringDefault(option, ""))
fmt.Printf("Adding key map handler %s %s output %s matching %#v\n", option, name, config.StringDefault(option, ""), keyMap)
}
if name == "all" {
initHandlerFor(c, config.StringDefault(option, ""), basePath, NewLogOptions(config, false, phandler))
} else {
initHandlerFor(c, config.StringDefault(option, ""), basePath, NewLogOptions(config, false, phandler, toLevel[name]))
}
}
}
}
}
}
// Init the log.error, log.warn etc configuration options
func initLogLevels(c *CompositeMultiHandler, basePath string, config *config.Context) {
for _, name := range []string{"debug", "info", "warn", "error", "crit",
"trace", // TODO trace is deprecated
} {
if config != nil {
extraLogFlag := config.BoolDefault(SPECIAL_USE_FLAG, false)
output, found := config.String("log." + name + ".output")
if found {
if extraLogFlag {
log.Printf("Adding standard handler %s output %s", name, output)
}
initHandlerFor(c, output, basePath, NewLogOptions(config, true, nil, toLevel[name]))
}
// Gets the list of options with said prefix
} else {
initHandlerFor(c, "stderr", basePath, NewLogOptions(config, true, nil, toLevel[name]))
}
}
}
// Init the request log options
func initRequestLog(c *CompositeMultiHandler, basePath string, config *config.Context) {
// Request logging to a separate output handler
// This takes the InfoHandlers and adds a MatchAbHandler handler to it to direct
// context with the word "section=requestlog" to that handler.
// Note if request logging is not enabled the MatchAbHandler will not be added and the
// request log messages will be sent out the INFO handler
outputRequest := "stdout"
if config != nil {
outputRequest = config.StringDefault("log.request.output", "")
}
oldInfo := c.InfoHandler
c.InfoHandler = nil
if outputRequest != "" {
initHandlerFor(c, outputRequest, basePath, NewLogOptions(config, false, nil, LvlInfo))
}
if c.InfoHandler != nil || oldInfo != nil {
if c.InfoHandler == nil {
c.InfoHandler = oldInfo
} else {
c.InfoHandler = MatchAbHandler("section", "requestlog", c.InfoHandler, oldInfo)
}
}
}
// Returns a handler for the level using the output string
// Accept formats for output string are
// LogFunctionMap[value] callback function
// `stdout` `stderr` `full/file/path/to/location/app.log` `full/file/path/to/location/app.json`
func initHandlerFor(c *CompositeMultiHandler, output, basePath string, options *LogOptions) {
if options.Ctx != nil {
options.SetExtendedOptions(
"noColor", !options.Ctx.BoolDefault("log.colorize", true),
"smallDate", options.Ctx.BoolDefault("log.smallDate", true),
"maxSizeMB", options.Ctx.IntDefault("log.maxsize", 1024*10),
"maxAgeDays", options.Ctx.IntDefault("log.maxage", 14),
"maxBackups", options.Ctx.IntDefault("log.maxbackups", 14),
"compress", !options.Ctx.BoolDefault("log.compressBackups", true),
)
}
output = strings.TrimSpace(output)
if funcHandler, found := LogFunctionMap[output]; found {
funcHandler(c, options)
} else {
switch output {
case "":
fallthrough
case "off":
// No handler, discard data
default:
// Write to file specified
if !filepath.IsAbs(output) {
output = filepath.Join(basePath, output)
}
if err := os.MkdirAll(filepath.Dir(output), 0755); err != nil {
log.Panic(err)
}
if strings.HasSuffix(output, "json") {
c.SetJsonFile(output, options)
} else {
// Override defaults for a terminal file
options.SetExtendedOptions("noColor", true)
options.SetExtendedOptions("smallDate", false)
c.SetTerminalFile(output, options)
}
}
}
return
}
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