mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-16 21:56:40 -05:00
3c90e370a4
This commit goes a long way toward making automated documentation of Caddy config and Caddy modules possible. It's a broad, sweeping change, but mostly internal. It allows us to automatically generate docs for all Caddy modules (including future third-party ones) and make them viewable on a web page; it also doubles as godoc comments. As such, this commit makes significant progress in migrating the docs from our temporary wiki page toward our new website which is still under construction. With this change, all host modules will use ctx.LoadModule() and pass in both the struct pointer and the field name as a string. This allows the reflect package to read the struct tag from that field so that it can get the necessary information like the module namespace and the inline key. This has the nice side-effect of unifying the code and documentation. It also simplifies module loading, and handles several variations on field types for raw module fields (i.e. variations on json.RawMessage, such as arrays and maps). I also renamed ModuleInfo.Name -> ModuleInfo.ID, to make it clear that the ID is the "full name" which includes both the module namespace and the name. This clarity is helpful when describing module hierarchy. As of this change, Caddy modules are no longer an experimental design. I think the architecture is good enough to go forward.
274 lines
6.5 KiB
Go
274 lines
6.5 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package httpcaddyfile
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import (
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"encoding/json"
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"fmt"
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"html"
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"net/http"
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"reflect"
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"github.com/caddyserver/caddy/v2"
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"github.com/caddyserver/caddy/v2/caddyconfig"
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"github.com/caddyserver/caddy/v2/modules/caddyhttp"
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"github.com/caddyserver/caddy/v2/modules/caddytls"
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)
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func init() {
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RegisterDirective("bind", parseBind)
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RegisterDirective("root", parseRoot)
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RegisterDirective("tls", parseTLS)
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RegisterHandlerDirective("redir", parseRedir)
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RegisterHandlerDirective("respond", parseRespond)
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}
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func parseBind(h Helper) ([]ConfigValue, error) {
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var lnHosts []string
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for h.Next() {
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lnHosts = append(lnHosts, h.RemainingArgs()...)
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}
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return h.NewBindAddresses(lnHosts), nil
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}
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func parseRoot(h Helper) ([]ConfigValue, error) {
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if !h.Next() {
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return nil, h.ArgErr()
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}
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matcherSet, ok, err := h.MatcherToken()
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if err != nil {
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return nil, err
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}
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if !ok {
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// no matcher token; oops
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h.Dispenser.Prev()
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}
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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root := h.Val()
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if h.NextArg() {
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return nil, h.ArgErr()
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}
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varsHandler := caddyhttp.VarsMiddleware{"root": root}
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route := caddyhttp.Route{
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HandlersRaw: []json.RawMessage{
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caddyconfig.JSONModuleObject(varsHandler, "handler", "vars", nil),
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},
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}
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if matcherSet != nil {
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route.MatcherSetsRaw = []caddy.ModuleMap{matcherSet}
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}
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return h.NewVarsRoute(route), nil
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}
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func parseTLS(h Helper) ([]ConfigValue, error) {
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var configVals []ConfigValue
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cp := new(caddytls.ConnectionPolicy)
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var fileLoader caddytls.FileLoader
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var folderLoader caddytls.FolderLoader
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var mgr caddytls.ACMEManagerMaker
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var off bool
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// fill in global defaults, if configured
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if email := h.Option("email"); email != nil {
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mgr.Email = email.(string)
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}
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if acmeCA := h.Option("acme_ca"); acmeCA != nil {
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mgr.CA = acmeCA.(string)
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}
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for h.Next() {
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// file certificate loader
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firstLine := h.RemainingArgs()
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switch len(firstLine) {
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case 0:
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case 1:
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if firstLine[0] == "off" {
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off = true
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} else {
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mgr.Email = firstLine[0]
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}
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case 2:
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fileLoader = append(fileLoader, caddytls.CertKeyFilePair{
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Certificate: firstLine[0],
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Key: firstLine[1],
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// TODO: add tags, for enterprise module's certificate selection
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})
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default:
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return nil, h.ArgErr()
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}
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var hasBlock bool
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for h.NextBlock(0) {
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hasBlock = true
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switch h.Val() {
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// connection policy
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case "protocols":
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args := h.RemainingArgs()
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if len(args) == 0 {
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return nil, h.SyntaxErr("one or two protocols")
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}
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if len(args) > 0 {
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if _, ok := caddytls.SupportedProtocols[args[0]]; !ok {
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return nil, h.Errf("Wrong protocol name or protocol not supported: '%s'", args[0])
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}
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cp.ProtocolMin = args[0]
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}
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if len(args) > 1 {
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if _, ok := caddytls.SupportedProtocols[args[1]]; !ok {
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return nil, h.Errf("Wrong protocol name or protocol not supported: '%s'", args[1])
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}
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cp.ProtocolMax = args[1]
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}
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case "ciphers":
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for h.NextArg() {
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if _, ok := caddytls.SupportedCipherSuites[h.Val()]; !ok {
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return nil, h.Errf("Wrong cipher suite name or cipher suite not supported: '%s'", h.Val())
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}
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cp.CipherSuites = append(cp.CipherSuites, h.Val())
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}
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case "curves":
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for h.NextArg() {
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if _, ok := caddytls.SupportedCurves[h.Val()]; !ok {
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return nil, h.Errf("Wrong curve name or curve not supported: '%s'", h.Val())
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}
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cp.Curves = append(cp.Curves, h.Val())
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}
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case "alpn":
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args := h.RemainingArgs()
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if len(args) == 0 {
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return nil, h.ArgErr()
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}
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cp.ALPN = args
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// certificate folder loader
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case "load":
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folderLoader = append(folderLoader, h.RemainingArgs()...)
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// automation policy
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case "ca":
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arg := h.RemainingArgs()
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if len(arg) != 1 {
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return nil, h.ArgErr()
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}
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mgr.CA = arg[0]
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default:
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return nil, h.Errf("unknown subdirective: %s", h.Val())
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}
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}
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// a naked tls directive is not allowed
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if len(firstLine) == 0 && !hasBlock {
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return nil, h.ArgErr()
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}
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}
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// connection policy
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configVals = append(configVals, ConfigValue{
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Class: "tls.connection_policy",
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Value: cp,
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})
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// certificate loaders
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if len(fileLoader) > 0 {
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configVals = append(configVals, ConfigValue{
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Class: "tls.certificate_loader",
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Value: fileLoader,
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})
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}
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if len(folderLoader) > 0 {
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configVals = append(configVals, ConfigValue{
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Class: "tls.certificate_loader",
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Value: folderLoader,
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})
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}
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// automation policy
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if off {
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configVals = append(configVals, ConfigValue{
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Class: "tls.off",
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Value: true,
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})
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} else if !reflect.DeepEqual(mgr, caddytls.ACMEManagerMaker{}) {
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configVals = append(configVals, ConfigValue{
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Class: "tls.automation_manager",
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Value: mgr,
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})
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}
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return configVals, nil
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}
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func parseRedir(h Helper) (caddyhttp.MiddlewareHandler, error) {
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if !h.Next() {
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return nil, h.ArgErr()
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}
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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to := h.Val()
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var code string
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if h.NextArg() {
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code = h.Val()
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}
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if code == "permanent" {
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code = "301"
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}
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if code == "temporary" || code == "" {
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code = "307"
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}
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var body string
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if code == "meta" {
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// Script tag comes first since that will better imitate a redirect in the browser's
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// history, but the meta tag is a fallback for most non-JS clients.
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const metaRedir = `<!DOCTYPE html>
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<html>
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<head>
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<title>Redirecting...</title>
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<script>window.location.replace("%s");</script>
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<meta http-equiv="refresh" content="0; URL='%s'">
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</head>
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<body>Redirecting to <a href="%s">%s</a>...</body>
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</html>
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`
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safeTo := html.EscapeString(to)
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body = fmt.Sprintf(metaRedir, safeTo, safeTo, safeTo, safeTo)
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}
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return caddyhttp.StaticResponse{
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StatusCode: caddyhttp.WeakString(code),
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Headers: http.Header{"Location": []string{to}},
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Body: body,
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}, nil
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}
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func parseRespond(h Helper) (caddyhttp.MiddlewareHandler, error) {
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sr := new(caddyhttp.StaticResponse)
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err := sr.UnmarshalCaddyfile(h.Dispenser)
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if err != nil {
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return nil, err
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}
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return sr, nil
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}
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