Exemplo n.º 1
0
// constructLine transforms tokens into a JSON-encodable structure;
// but only one line at a time, to be used at the top-level of
// a server block only (where the first token on each line is a
// directive) - not to be used at any other nesting level.
func constructLine(d parse.Dispenser) interface{} {
	var args []interface{}

	all := d.RemainingArgs()
	for _, arg := range all {
		args = append(args, arg)
	}

	d.Next()
	if d.Val() == "{" {
		args = append(args, constructBlock(d))
	}

	return args
}
Exemplo n.º 2
0
// NewStaticUpstreams parses the configuration input and sets up
// static upstreams for the proxy middleware.
func NewStaticUpstreams(c parse.Dispenser) ([]Upstream, error) {
	var upstreams []Upstream
	for c.Next() {
		upstream := &staticUpstream{
			from:              "",
			upstreamHeaders:   make(http.Header),
			downstreamHeaders: make(http.Header),
			Hosts:             nil,
			Policy:            &Random{},
			FailTimeout:       10 * time.Second,
			MaxFails:          1,
			MaxConns:          0,
		}

		if !c.Args(&upstream.from) {
			return upstreams, c.ArgErr()
		}
		to := c.RemainingArgs()
		if len(to) == 0 {
			return upstreams, c.ArgErr()
		}

		for c.NextBlock() {
			if err := parseBlock(&c, upstream); err != nil {
				return upstreams, err
			}
		}

		upstream.Hosts = make([]*UpstreamHost, len(to))
		for i, host := range to {
			uh, err := upstream.NewHost(host)
			if err != nil {
				return upstreams, err
			}
			upstream.Hosts[i] = uh
		}

		if upstream.HealthCheck.Path != "" {
			go upstream.HealthCheckWorker(nil)
		}
		upstreams = append(upstreams, upstream)
	}
	return upstreams, nil
}
Exemplo n.º 3
0
// constructBlock recursively processes tokens into a
// JSON-encodable structure.
func constructBlock(d parse.Dispenser) interface{} {
	block := make(map[string]interface{})

	for d.Next() {
		if d.Val() == "}" {
			break
		}

		dir := d.Val()
		all := d.RemainingArgs()

		var args []interface{}
		for _, arg := range all {
			args = append(args, arg)
		}
		if d.Val() == "{" {
			args = append(args, constructBlock(d))
		}

		block[dir] = args
	}

	return block
}
Exemplo n.º 4
0
// NewStaticUpstreams parses the configuration input and sets up
// static upstreams for the proxy middleware.
func NewStaticUpstreams(c parse.Dispenser) ([]Upstream, error) {
	var upstreams []Upstream
	for c.Next() {
		upstream := &staticUpstream{
			from:          "",
			proxyHeaders:  make(http.Header),
			hiddenHeaders: make(http.Header),
			Hosts:         nil,
			Policy:        &Random{},
			FailTimeout:   10 * time.Second,
			MaxFails:      1,
		}

		if !c.Args(&upstream.from) {
			return upstreams, c.ArgErr()
		}
		to := c.RemainingArgs()
		if len(to) == 0 {
			return upstreams, c.ArgErr()
		}

		for c.NextBlock() {
			if err := parseBlock(&c, upstream); err != nil {
				return upstreams, err
			}
		}

		upstream.Hosts = make([]*UpstreamHost, len(to))
		for i, host := range to {
			if !strings.HasPrefix(host, "http") &&
				!strings.HasPrefix(host, "unix:") {
				host = "http://" + host
			}
			uh := &UpstreamHost{
				Name:          host,
				Conns:         0,
				Fails:         0,
				FailTimeout:   upstream.FailTimeout,
				Unhealthy:     false,
				ExtraHeaders:  upstream.proxyHeaders,
				HiddenHeaders: upstream.hiddenHeaders,
				CheckDown: func(upstream *staticUpstream) UpstreamHostDownFunc {
					return func(uh *UpstreamHost) bool {
						if uh.Unhealthy {
							return true
						}
						if uh.Fails >= upstream.MaxFails &&
							upstream.MaxFails != 0 {
							return true
						}
						return false
					}
				}(upstream),
				WithoutPathPrefix: upstream.WithoutPathPrefix,
			}
			if baseURL, err := url.Parse(uh.Name); err == nil {
				uh.ReverseProxy = NewSingleHostReverseProxy(baseURL, uh.WithoutPathPrefix)
				if upstream.insecureSkipVerify {
					uh.ReverseProxy.Transport = InsecureTransport
				}
			} else {
				return upstreams, err
			}
			upstream.Hosts[i] = uh
		}

		if upstream.HealthCheck.Path != "" {
			go upstream.HealthCheckWorker(nil)
		}
		upstreams = append(upstreams, upstream)
	}
	return upstreams, nil
}
Exemplo n.º 5
0
func parseBlock(c *parse.Dispenser, u *staticUpstream) error {
	switch c.Val() {
	case "policy":
		if !c.NextArg() {
			return c.ArgErr()
		}
		policyCreateFunc, ok := supportedPolicies[c.Val()]
		if !ok {
			return c.ArgErr()
		}
		u.Policy = policyCreateFunc()
	case "fail_timeout":
		if !c.NextArg() {
			return c.ArgErr()
		}
		dur, err := time.ParseDuration(c.Val())
		if err != nil {
			return err
		}
		u.FailTimeout = dur
	case "max_fails":
		if !c.NextArg() {
			return c.ArgErr()
		}
		n, err := strconv.Atoi(c.Val())
		if err != nil {
			return err
		}
		u.MaxFails = int32(n)
	case "health_check":
		if !c.NextArg() {
			return c.ArgErr()
		}
		u.HealthCheck.Path = c.Val()
		u.HealthCheck.Interval = 30 * time.Second
		if c.NextArg() {
			dur, err := time.ParseDuration(c.Val())
			if err != nil {
				return err
			}
			u.HealthCheck.Interval = dur
		}
	case "proxy_header":
		var header, value string
		if !c.Args(&header, &value) {
			return c.ArgErr()
		}
		u.proxyHeaders.Add(header, value)
	case "hide_header":
		var header, value string
		if !c.Args(&header, &value) {
			return c.ArgErr()
		}
		u.hiddenHeaders.Add(header, value)
	case "websocket":
		u.proxyHeaders.Add("Connection", "{>Connection}")
		u.proxyHeaders.Add("Upgrade", "{>Upgrade}")
	case "without":
		if !c.NextArg() {
			return c.ArgErr()
		}
		u.WithoutPathPrefix = c.Val()
	case "except":
		ignoredPaths := c.RemainingArgs()
		if len(ignoredPaths) == 0 {
			return c.ArgErr()
		}
		u.IgnoredSubPaths = ignoredPaths
	case "insecure_skip_verify":
		u.insecureSkipVerify = true
	default:
		return c.Errf("unknown property '%s'", c.Val())
	}
	return nil
}