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// Copyright 2015 Matthew Holt and The Caddy Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package httpcaddyfile
import (
"encoding/json"
"fmt"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddyconfig"
"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
"github.com/dustin/go-humanize"
)
// serverOptions collects server config overrides parsed from Caddyfile global options
type serverOptions struct {
// If set, will only apply these options to servers that contain a
// listener address that matches exactly. If empty, will apply to all
// servers that were not already matched by another serverOptions.
ListenerAddress string
// These will all map 1:1 to the caddyhttp.Server struct
ListenerWrappersRaw []json.RawMessage
ReadTimeout caddy.Duration
ReadHeaderTimeout caddy.Duration
WriteTimeout caddy.Duration
IdleTimeout caddy.Duration
MaxHeaderBytes int
AllowH2C bool
ExperimentalHTTP3 bool
StrictSNIHost *bool
}
func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (interface{}, error) {
serverOpts := serverOptions{}
for d.Next() {
if d.NextArg() {
serverOpts.ListenerAddress = d.Val()
if d.NextArg() {
return nil, d.ArgErr()
}
}
for nesting := d.Nesting(); d.NextBlock(nesting); {
switch d.Val() {
case "listener_wrappers":
for nesting := d.Nesting(); d.NextBlock(nesting); {
mod, err := caddy.GetModule("caddy.listeners." + d.Val())
if err != nil {
return nil, fmt.Errorf("finding listener module '%s': %v", d.Val(), err)
}
unm, ok := mod.New().(caddyfile.Unmarshaler)
if !ok {
return nil, fmt.Errorf("listener module '%s' is not a Caddyfile unmarshaler", mod)
}
err = unm.UnmarshalCaddyfile(d.NewFromNextSegment())
if err != nil {
return nil, err
}
listenerWrapper, ok := unm.(caddy.ListenerWrapper)
if !ok {
return nil, fmt.Errorf("module %s is not a listener wrapper", mod)
}
jsonListenerWrapper := caddyconfig.JSONModuleObject(
listenerWrapper,
"wrapper",
listenerWrapper.(caddy.Module).CaddyModule().ID.Name(),
nil,
)
serverOpts.ListenerWrappersRaw = append(serverOpts.ListenerWrappersRaw, jsonListenerWrapper)
}
case "timeouts":
for nesting := d.Nesting(); d.NextBlock(nesting); {
switch d.Val() {
case "read_body":
if !d.NextArg() {
return nil, d.ArgErr()
}
dur, err := caddy.ParseDuration(d.Val())
if err != nil {
return nil, d.Errf("parsing read_body timeout duration: %v", err)
}
serverOpts.ReadTimeout = caddy.Duration(dur)
case "read_header":
if !d.NextArg() {
return nil, d.ArgErr()
}
dur, err := caddy.ParseDuration(d.Val())
if err != nil {
return nil, d.Errf("parsing read_header timeout duration: %v", err)
}
serverOpts.ReadHeaderTimeout = caddy.Duration(dur)
case "write":
if !d.NextArg() {
return nil, d.ArgErr()
}
dur, err := caddy.ParseDuration(d.Val())
if err != nil {
return nil, d.Errf("parsing write timeout duration: %v", err)
}
serverOpts.WriteTimeout = caddy.Duration(dur)
case "idle":
if !d.NextArg() {
return nil, d.ArgErr()
}
dur, err := caddy.ParseDuration(d.Val())
if err != nil {
return nil, d.Errf("parsing idle timeout duration: %v", err)
}
serverOpts.IdleTimeout = caddy.Duration(dur)
default:
return nil, d.Errf("unrecognized timeouts option '%s'", d.Val())
}
}
case "max_header_size":
var sizeStr string
if !d.AllArgs(&sizeStr) {
return nil, d.ArgErr()
}
size, err := humanize.ParseBytes(sizeStr)
if err != nil {
return nil, d.Errf("parsing max_header_size: %v", err)
}
serverOpts.MaxHeaderBytes = int(size)
case "protocol":
for nesting := d.Nesting(); d.NextBlock(nesting); {
switch d.Val() {
case "allow_h2c":
if d.NextArg() {
return nil, d.ArgErr()
}
serverOpts.AllowH2C = true
case "experimental_http3":
if d.NextArg() {
return nil, d.ArgErr()
}
serverOpts.ExperimentalHTTP3 = true
case "strict_sni_host":
if d.NextArg() {
return nil, d.ArgErr()
}
trueBool := true
serverOpts.StrictSNIHost = &trueBool
default:
return nil, d.Errf("unrecognized protocol option '%s'", d.Val())
}
}
default:
return nil, d.Errf("unrecognized servers option '%s'", d.Val())
}
}
}
return serverOpts, nil
}
// applyServerOptions sets the server options on the appropriate servers
func applyServerOptions(
servers map[string]*caddyhttp.Server,
options map[string]interface{},
warnings *[]caddyconfig.Warning,
) error {
// If experimental HTTP/3 is enabled, enable it on each server.
// We already know there won't be a conflict with serverOptions because
// we validated earlier that "experimental_http3" cannot be set at the same
// time as "servers"
if enableH3, ok := options["experimental_http3"].(bool); ok && enableH3 {
*warnings = append(*warnings, caddyconfig.Warning{Message: "the 'experimental_http3' global option is deprecated, please use the 'servers > protocol > experimental_http3' option instead"})
for _, srv := range servers {
srv.ExperimentalHTTP3 = true
}
}
serverOpts, ok := options["servers"].([]serverOptions)
if !ok {
return nil
}
for _, server := range servers {
// find the options that apply to this server
opts := func() *serverOptions {
for _, entry := range serverOpts {
if entry.ListenerAddress == "" {
return &entry
}
for _, listener := range server.Listen {
if entry.ListenerAddress == listener {
return &entry
}
}
}
return nil
}()
// if none apply, then move to the next server
if opts == nil {
continue
}
// set all the options
server.ListenerWrappersRaw = opts.ListenerWrappersRaw
server.ReadTimeout = opts.ReadTimeout
server.ReadHeaderTimeout = opts.ReadHeaderTimeout
server.WriteTimeout = opts.WriteTimeout
server.IdleTimeout = opts.IdleTimeout
server.MaxHeaderBytes = opts.MaxHeaderBytes
server.AllowH2C = opts.AllowH2C
server.ExperimentalHTTP3 = opts.ExperimentalHTTP3
server.StrictSNIHost = opts.StrictSNIHost
}
return nil
}
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