Golang Logger.Debug方法代码示例

// materializeFile takes a physical file or stream (named pipe, user input,
// ...) and returns an io.Reader and the number of bytes that can be read
// from it.
func materializeFile(log *logging.Logger, f *os.File) (io.Reader, int64, error) {
	fi, err := f.Stat()
	if err != nil {
		return nil, 0, err
	}

	// If the file is actually a char device (like user typed input)
	// or a named pipe (like a streamed in file), buffer it up.
	//
	// When uploading a file, you need to either explicitly set the
	// Content-Length header or send a chunked request. Since the
	// github upload server doesn't accept chunked encoding, we have
	// to set the size of the file manually. Since a stream doesn't have a
	// predefined length, it's read entirely into a byte buffer.
	if fi.Mode()&(os.ModeCharDevice|os.ModeNamedPipe) == 1 {
		log.Debug("input was a stream, buffering up")

		var buf bytes.Buffer
		n, err := buf.ReadFrom(f)
		if err != nil {
			return nil, 0, errors.New("req: could not buffer up input stream: " + err.Error())
		}
		return &buf, n, err
	}

	// We know the os.File is most likely an actual file now.
	n, err := GetFileSize(f)
	return f, n, err
}

// Execute a given command without waiting for its result.
func ExecDetached(log *log.Logger, cmdName string, arguments ...string) error {
	if log != nil {
		log.Debug("Running %s %v", cmdName, arguments)
	}
	cmd := exec.Command(cmdName, arguments...)
	return cmd.Start()
}

func buildDispatcher(
	startup *StartupConfig,
	cfg *config.Configuration,
	consul *api.Client,
	handler *proxy.ProxyHandler,
	rpool *redis.Pool,
	logger *logging.Logger,
	lastIndex uint64,
) (dispatcher.Dispatcher, uint64, error) {
	var disp dispatcher.Dispatcher
	var err error
	var meta *api.QueryMeta
	var configs api.KVPairs
	var localCfg config.Configuration = *cfg
	var appCfgs map[string]config.Application = make(map[string]config.Application)

	dispLogger := logging.MustGetLogger("dispatch")

	switch startup.DispatchingMode {
	case "path":
		disp, err = dispatcher.NewPathBasedDispatcher(&localCfg, dispLogger, handler)
	case "host":
		disp, err = dispatcher.NewHostBasedDispatcher(&localCfg, dispLogger, handler)
	default:
		err = fmt.Errorf("unsupported dispatching mode: '%s'", startup.DispatchingMode)
	}

	if err != nil {
		return nil, 0, fmt.Errorf("error while creating proxy builder: %s", err)
	}

	applicationConfigBase := startup.ConsulBaseKey + "/applications"
	queryOpts := api.QueryOptions{
		WaitIndex: lastIndex,
		WaitTime:  30 * time.Minute,
	}

	logger.Info("loading gateway config from KV %s", startup.ConsulBaseKey)
	configs, meta, err = consul.KV().List(startup.ConsulBaseKey, &queryOpts)
	if err != nil {
		return nil, 0, err
	}

	for _, cfgKVPair := range configs {
		logger.Debug("found KV pair with key '%s'", cfgKVPair.Key)

		switch strings.TrimPrefix(startup.ConsulBaseKey+"/", cfgKVPair.Key) {
		case "authentication":
			if err := json.Unmarshal(cfgKVPair.Value, &localCfg.Authentication); err != nil {
				return nil, meta.LastIndex, fmt.Errorf("JSON error on consul KV pair '%s': %s", cfgKVPair.Key, err)
			}
		case "rate_limiting":
			if err := json.Unmarshal(cfgKVPair.Value, &localCfg.RateLimiting); err != nil {
				return nil, meta.LastIndex, fmt.Errorf("JSON error on consul KV pair '%s': %s", cfgKVPair.Key, err)
			}
		}

		if strings.HasPrefix(cfgKVPair.Key, applicationConfigBase) {
			var appCfg config.Application

			if err := json.Unmarshal(cfgKVPair.Value, &appCfg); err != nil {
				return nil, meta.LastIndex, fmt.Errorf("JSON error on consul KV pair '%s': %s", cfgKVPair.Key, err)
			}

			name := strings.TrimPrefix(cfgKVPair.Key, applicationConfigBase+"/")
			appCfgs[name] = appCfg
		}
	}

	authHandler, err := auth.NewAuthDecorator(&localCfg.Authentication, rpool, logging.MustGetLogger("auth"), startup.UiDir)
	if err != nil {
		return nil, meta.LastIndex, err
	}

	rlim, err := ratelimit.NewRateLimiter(localCfg.RateLimiting, rpool, logging.MustGetLogger("ratelimiter"))
	if err != nil {
		logger.Fatal(fmt.Sprintf("error while configuring rate limiting: %s", err))
	}

	cch := cache.NewCache(4096)

	// Order is important here! Behaviours will be called in LIFO order;
	// behaviours that are added last will be called first!
	disp.AddBehaviour(dispatcher.NewCachingBehaviour(cch))
	disp.AddBehaviour(dispatcher.NewAuthenticationBehaviour(authHandler))
	disp.AddBehaviour(dispatcher.NewRatelimitBehaviour(rlim))

	for name, appCfg := range appCfgs {
		logger.Info("registering application '%s' from Consul", name)
		if err := disp.RegisterApplication(name, appCfg); err != nil {
			return nil, meta.LastIndex, err
		}
	}

	for name, appCfg := range localCfg.Applications {
		logger.Info("registering application '%s' from local config", name)
		if err := disp.RegisterApplication(name, appCfg); err != nil {
			return nil, meta.LastIndex, err
		}
	}
//.........这里部分代码省略.........