func parseBlock(c *caddyfile.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
}
if n < 1 {
return c.Err("max_fails must be at least 1")
}
u.MaxFails = int32(n)
case "try_duration":
if !c.NextArg() {
return c.ArgErr()
}
dur, err := time.ParseDuration(c.Val())
if err != nil {
return err
}
u.TryDuration = dur
case "try_interval":
if !c.NextArg() {
return c.ArgErr()
}
interval, err := time.ParseDuration(c.Val())
if err != nil {
return err
}
u.TryInterval = interval
case "max_conns":
if !c.NextArg() {
return c.ArgErr()
}
n, err := strconv.ParseInt(c.Val(), 10, 64)
if err != nil {
return err
}
u.MaxConns = n
case "health_check":
if !c.NextArg() {
return c.ArgErr()
}
u.HealthCheck.Path = c.Val()
// Set defaults
if u.HealthCheck.Interval == 0 {
u.HealthCheck.Interval = 30 * time.Second
}
if u.HealthCheck.Timeout == 0 {
u.HealthCheck.Timeout = 60 * time.Second
}
case "health_check_interval":
var interval string
if !c.Args(&interval) {
return c.ArgErr()
}
dur, err := time.ParseDuration(interval)
if err != nil {
return err
}
u.HealthCheck.Interval = dur
case "health_check_timeout":
var interval string
if !c.Args(&interval) {
return c.ArgErr()
}
dur, err := time.ParseDuration(interval)
if err != nil {
return err
}
u.HealthCheck.Timeout = dur
case "proxy_header": // TODO: deprecate this shortly after 0.9
if !warnedProxyHeaderDeprecation {
fmt.Println("WARNING: proxy_header is deprecated and will be removed soon; use header_upstream instead.")
warnedProxyHeaderDeprecation = true
}
fallthrough
case "header_upstream":
var header, value string
if !c.Args(&header, &value) {
return c.ArgErr()
}
u.upstreamHeaders.Add(header, value)
case "header_downstream":
var header, value string
if !c.Args(&header, &value) {
return c.ArgErr()
}
u.downstreamHeaders.Add(header, value)
case "transparent":
u.upstreamHeaders.Add("Host", "{host}")
u.upstreamHeaders.Add("X-Real-IP", "{remote}")
u.upstreamHeaders.Add("X-Forwarded-For", "{remote}")
u.upstreamHeaders.Add("X-Forwarded-Proto", "{scheme}")
case "websocket":
u.upstreamHeaders.Add("Connection", "{>Connection}")
u.upstreamHeaders.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
case "keepalive":
if !c.NextArg() {
return c.ArgErr()
}
n, err := strconv.Atoi(c.Val())
if err != nil {
return err
}
if n < 0 {
return c.ArgErr()
}
u.KeepAlive = n
default:
return c.Errf("unknown property '%s'", c.Val())
}
return nil
}
// NewStaticUpstreams parses the configuration input and sets up
// static upstreams for the proxy middleware.
func NewStaticUpstreams(c caddyfile.Dispenser) ([]Upstream, error) {
var upstreams []Upstream
for c.Next() {
upstream := &staticUpstream{
from: "",
upstreamHeaders: make(http.Header),
downstreamHeaders: make(http.Header),
Hosts: nil,
Policy: &Random{},
MaxFails: 1,
TryInterval: 250 * time.Millisecond,
MaxConns: 0,
KeepAlive: http.DefaultMaxIdleConnsPerHost,
}
if !c.Args(&upstream.from) {
return upstreams, c.ArgErr()
}
var to []string
for _, t := range c.RemainingArgs() {
parsed, err := parseUpstream(t)
if err != nil {
return upstreams, err
}
to = append(to, parsed...)
}
for c.NextBlock() {
switch c.Val() {
case "upstream":
if !c.NextArg() {
return upstreams, c.ArgErr()
}
parsed, err := parseUpstream(c.Val())
if err != nil {
return upstreams, err
}
to = append(to, parsed...)
default:
if err := parseBlock(&c, upstream); err != nil {
return upstreams, err
}
}
}
if len(to) == 0 {
return upstreams, c.ArgErr()
}
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 != "" {
upstream.HealthCheck.Client = http.Client{
Timeout: upstream.HealthCheck.Timeout,
}
go upstream.HealthCheckWorker(nil)
}
upstreams = append(upstreams, upstream)
}
return upstreams, nil
}
func parseBlock(c *caddyfile.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 "max_conns":
if !c.NextArg() {
return c.ArgErr()
}
n, err := strconv.ParseInt(c.Val(), 10, 64)
if err != nil {
return err
}
u.MaxConns = n
case "health_check":
if !c.NextArg() {
return c.ArgErr()
}
u.HealthCheck.Path = c.Val()
// Set defaults
if u.HealthCheck.Interval == 0 {
u.HealthCheck.Interval = 30 * time.Second
}
if u.HealthCheck.Timeout == 0 {
u.HealthCheck.Timeout = 60 * time.Second
}
case "health_check_interval":
var interval string
if !c.Args(&interval) {
return c.ArgErr()
}
dur, err := time.ParseDuration(interval)
if err != nil {
return err
}
u.HealthCheck.Interval = dur
case "health_check_timeout":
var interval string
if !c.Args(&interval) {
return c.ArgErr()
}
dur, err := time.ParseDuration(interval)
if err != nil {
return err
}
u.HealthCheck.Timeout = dur
case "header_upstream":
fallthrough
case "proxy_header":
var header, value string
if !c.Args(&header, &value) {
return c.ArgErr()
}
u.upstreamHeaders.Add(header, value)
case "header_downstream":
var header, value string
if !c.Args(&header, &value) {
return c.ArgErr()
}
u.downstreamHeaders.Add(header, value)
case "transparent":
u.upstreamHeaders.Add("Host", "{host}")
u.upstreamHeaders.Add("X-Real-IP", "{remote}")
u.upstreamHeaders.Add("X-Forwarded-Proto", "{scheme}")
case "websocket":
u.upstreamHeaders.Add("Connection", "{>Connection}")
u.upstreamHeaders.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
}