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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"
"reflect"
"sort"
"strings"
"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/caddyserver/caddy/v2/modules/caddytls"
"github.com/mholt/certmagic"
)
func init() {
caddyconfig.RegisterAdapter("caddyfile", caddyfile.Adapter{ServerType: ServerType{}})
}
// ServerType can set up a config from an HTTP Caddyfile.
type ServerType struct {
}
// Setup makes a config from the tokens.
func (st ServerType) Setup(originalServerBlocks []caddyfile.ServerBlock,
options map[string]interface{}) (*caddy.Config, []caddyconfig.Warning, error) {
var warnings []caddyconfig.Warning
gc := counter{new(int)}
// load all the server blocks and associate them with a "pile"
// of config values; also prohibit duplicate keys because they
// can make a config confusing if more than one server block is
// chosen to handle a request - we actually will make each
// server block's route terminal so that only one will run
sbKeys := make(map[string]struct{})
var serverBlocks []serverBlock
for i, sblock := range originalServerBlocks {
for j, k := range sblock.Keys {
if _, ok := sbKeys[k]; ok {
return nil, warnings, fmt.Errorf("duplicate site address not allowed: '%s' in %v (site block %d, key %d)", k, sblock.Keys, i, j)
}
sbKeys[k] = struct{}{}
}
serverBlocks = append(serverBlocks, serverBlock{
block: sblock,
pile: make(map[string][]ConfigValue),
})
}
// apply any global options
var err error
serverBlocks, err = st.evaluateGlobalOptionsBlock(serverBlocks, options)
if err != nil {
return nil, warnings, err
}
for _, sb := range serverBlocks {
// replace shorthand placeholders (which are
// convenient when writing a Caddyfile) with
// their actual placeholder identifiers or
// variable names
replacer := strings.NewReplacer(
"{dir}", "{http.request.uri.path.dir}",
"{file}", "{http.request.uri.path.file}",
"{host}", "{http.request.host}",
"{hostport}", "{http.request.hostport}",
"{method}", "{http.request.method}",
"{path}", "{http.request.uri.path}",
"{query}", "{http.request.uri.query}",
"{remote_host}", "{http.request.remote.host}",
"{remote_port}", "{http.request.remote.port}",
"{remote}", "{http.request.remote}",
"{scheme}", "{http.request.scheme}",
"{uri}", "{http.request.uri}",
)
for _, segment := range sb.block.Segments {
for i := 0; i < len(segment); i++ {
segment[i].Text = replacer.Replace(segment[i].Text)
}
}
if len(sb.block.Keys) == 0 {
return nil, warnings, fmt.Errorf("server block without any key is global configuration, and if used, it must be first")
}
// extract matcher definitions
matcherDefs := make(map[string]caddy.ModuleMap)
for _, segment := range sb.block.Segments {
if dir := segment.Directive(); strings.HasPrefix(dir, matcherPrefix) {
d := sb.block.DispenseDirective(dir)
err := parseMatcherDefinitions(d, matcherDefs)
if err != nil {
return nil, warnings, err
}
}
}
// evaluate each directive ("segment") in this block
for _, segment := range sb.block.Segments {
dir := segment.Directive()
if strings.HasPrefix(dir, matcherPrefix) {
// matcher definitions were pre-processed
continue
}
dirFunc, ok := registeredDirectives[dir]
if !ok {
tkn := segment[0]
return nil, warnings, fmt.Errorf("%s:%d: unrecognized directive: %s", tkn.File, tkn.Line, dir)
}
results, err := dirFunc(Helper{
Dispenser: caddyfile.NewDispenser(segment),
options: options,
warnings: &warnings,
matcherDefs: matcherDefs,
parentBlock: sb.block,
groupCounter: gc,
})
if err != nil {
return nil, warnings, fmt.Errorf("parsing caddyfile tokens for '%s': %v", dir, err)
}
for _, result := range results {
result.directive = dir
sb.pile[result.Class] = append(sb.pile[result.Class], result)
}
}
}
// map
sbmap, err := st.mapAddressToServerBlocks(serverBlocks, options)
if err != nil {
return nil, warnings, err
}
// reduce
pairings := st.consolidateAddrMappings(sbmap)
// each pairing of listener addresses to list of server
// blocks is basically a server definition
servers, err := st.serversFromPairings(pairings, options, &warnings, gc)
if err != nil {
return nil, warnings, err
}
// now that each server is configured, make the HTTP app
httpApp := caddyhttp.App{
HTTPPort: tryInt(options["http_port"], &warnings),
HTTPSPort: tryInt(options["https_port"], &warnings),
Servers: servers,
}
// now for the TLS app! (TODO: refactor into own func)
tlsApp := caddytls.TLS{CertificatesRaw: make(caddy.ModuleMap)}
for _, p := range pairings {
for i, sblock := range p.serverBlocks {
// tls automation policies
if mmVals, ok := sblock.pile["tls.automation_manager"]; ok {
for _, mmVal := range mmVals {
mm := mmVal.Value.(caddytls.ManagerMaker)
sblockHosts, err := st.autoHTTPSHosts(sblock)
if err != nil {
return nil, warnings, err
}
if len(sblockHosts) > 0 {
if tlsApp.Automation == nil {
tlsApp.Automation = new(caddytls.AutomationConfig)
}
tlsApp.Automation.Policies = append(tlsApp.Automation.Policies, &caddytls.AutomationPolicy{
Hosts: sblockHosts,
ManagementRaw: caddyconfig.JSONModuleObject(mm, "module", mm.(caddy.Module).CaddyModule().ID.Name(), &warnings),
})
} else {
warnings = append(warnings, caddyconfig.Warning{
Message: fmt.Sprintf("Server block %d %v has no names that qualify for automatic HTTPS, so no TLS automation policy will be added.", i, sblock.block.Keys),
})
}
}
}
// tls certificate loaders
if clVals, ok := sblock.pile["tls.certificate_loader"]; ok {
for _, clVal := range clVals {
loader := clVal.Value.(caddytls.CertificateLoader)
loaderName := caddy.GetModuleName(loader)
tlsApp.CertificatesRaw[loaderName] = caddyconfig.JSON(loader, &warnings)
}
}
}
}
// if global ACME CA, DNS, or email were set, append a catch-all automation
// policy that ensures they will be used if no tls directive was used
acmeCA, hasACMECA := options["acme_ca"]
acmeDNS, hasACMEDNS := options["acme_dns"]
email, hasEmail := options["email"]
if hasACMECA || hasACMEDNS || hasEmail {
if tlsApp.Automation == nil {
tlsApp.Automation = new(caddytls.AutomationConfig)
}
if !hasACMECA {
acmeCA = ""
}
if !hasEmail {
email = ""
}
mgr := caddytls.ACMEManagerMaker{
CA: acmeCA.(string),
Email: email.(string),
}
if hasACMEDNS {
provName := acmeDNS.(string)
dnsProvModule, err := caddy.GetModule("tls.dns." + provName)
if err != nil {
return nil, warnings, fmt.Errorf("getting DNS provider module named '%s': %v", provName, err)
}
mgr.Challenges = &caddytls.ChallengesConfig{
DNSRaw: caddyconfig.JSONModuleObject(dnsProvModule.New(), "provider", provName, &warnings),
}
}
tlsApp.Automation.Policies = append(tlsApp.Automation.Policies, &caddytls.AutomationPolicy{
ManagementRaw: caddyconfig.JSONModuleObject(mgr, "module", "acme", &warnings),
})
}
if tlsApp.Automation != nil {
// consolidate automation policies that are the exact same
tlsApp.Automation.Policies = consolidateAutomationPolicies(tlsApp.Automation.Policies)
}
// if experimental HTTP/3 is enabled, enable it on each server
if enableH3, ok := options["experimental_http3"].(bool); ok && enableH3 {
for _, srv := range httpApp.Servers {
srv.ExperimentalHTTP3 = true
}
}
// annnd the top-level config, then we're done!
cfg := &caddy.Config{AppsRaw: make(caddy.ModuleMap)}
if !reflect.DeepEqual(httpApp, caddyhttp.App{}) {
cfg.AppsRaw["http"] = caddyconfig.JSON(httpApp, &warnings)
}
if !reflect.DeepEqual(tlsApp, caddytls.TLS{CertificatesRaw: make(caddy.ModuleMap)}) {
cfg.AppsRaw["tls"] = caddyconfig.JSON(tlsApp, &warnings)
}
if storageCvtr, ok := options["storage"].(caddy.StorageConverter); ok {
cfg.StorageRaw = caddyconfig.JSONModuleObject(storageCvtr,
"module",
storageCvtr.(caddy.Module).CaddyModule().ID.Name(),
&warnings)
}
if adminConfig, ok := options["admin"].(string); ok && adminConfig != "" {
cfg.Admin = &caddy.AdminConfig{Listen: adminConfig}
}
return cfg, warnings, nil
}
// evaluateGlobalOptionsBlock evaluates the global options block,
// which is expected to be the first server block if it has zero
// keys. It returns the updated list of server blocks with the
// global options block removed, and updates options accordingly.
func (ServerType) evaluateGlobalOptionsBlock(serverBlocks []serverBlock, options map[string]interface{}) ([]serverBlock, error) {
if len(serverBlocks) == 0 || len(serverBlocks[0].block.Keys) > 0 {
return serverBlocks, nil
}
for _, segment := range serverBlocks[0].block.Segments {
dir := segment.Directive()
var val interface{}
var err error
disp := caddyfile.NewDispenser(segment)
// TODO: make this switch into a map
switch dir {
case "http_port":
val, err = parseOptHTTPPort(disp)
case "https_port":
val, err = parseOptHTTPSPort(disp)
case "order":
val, err = parseOptOrder(disp)
case "experimental_http3":
val, err = parseOptExperimentalHTTP3(disp)
case "storage":
val, err = parseOptStorage(disp)
case "acme_ca", "acme_dns", "acme_ca_root":
val, err = parseOptACME(disp)
case "email":
val, err = parseOptEmail(disp)
case "admin":
val, err = parseOptAdmin(disp)
default:
return nil, fmt.Errorf("unrecognized parameter name: %s", dir)
}
if err != nil {
return nil, fmt.Errorf("%s: %v", dir, err)
}
options[dir] = val
}
return serverBlocks[1:], nil
}
// hostsFromServerBlockKeys returns a list of all the
// hostnames found in the keys of the server block sb.
// The list may not be in a consistent order.
func (st *ServerType) hostsFromServerBlockKeys(sb caddyfile.ServerBlock) ([]string, error) {
// first get each unique hostname
hostMap := make(map[string]struct{})
for _, sblockKey := range sb.Keys {
addr, err := ParseAddress(sblockKey)
if err != nil {
return nil, fmt.Errorf("parsing server block key: %v", err)
}
addr = addr.Normalize()
if addr.Host == "" {
continue
}
hostMap[addr.Host] = struct{}{}
}
// convert map to slice
sblockHosts := make([]string, 0, len(hostMap))
for host := range hostMap {
sblockHosts = append(sblockHosts, host)
}
return sblockHosts, nil
}
// serversFromPairings creates the servers for each pairing of addresses
// to server blocks. Each pairing is essentially a server definition.
func (st *ServerType) serversFromPairings(
pairings []sbAddrAssociation,
options map[string]interface{},
warnings *[]caddyconfig.Warning,
groupCounter counter,
) (map[string]*caddyhttp.Server, error) {
servers := make(map[string]*caddyhttp.Server)
for i, p := range pairings {
srv := &caddyhttp.Server{
Listen: p.addresses,
}
// sort server blocks by their keys; this is important because
// only the first matching site should be evaluated, and we should
// attempt to match most specific site first (host and path), in
// case their matchers overlap; we do this somewhat naively by
// descending sort by length of host then path
sort.SliceStable(p.serverBlocks, func(i, j int) bool {
// TODO: we could pre-process the specificities for efficiency,
// but I don't expect many blocks will have SO many keys...
var iLongestPath, jLongestPath string
var iLongestHost, jLongestHost string
for _, key := range p.serverBlocks[i].block.Keys {
addr, _ := ParseAddress(key)
if specificity(addr.Host) > specificity(iLongestHost) {
iLongestHost = addr.Host
}
if specificity(addr.Path) > specificity(iLongestPath) {
iLongestPath = addr.Path
}
}
for _, key := range p.serverBlocks[j].block.Keys {
addr, _ := ParseAddress(key)
if specificity(addr.Host) > specificity(jLongestHost) {
jLongestHost = addr.Host
}
if specificity(addr.Path) > specificity(jLongestPath) {
jLongestPath = addr.Path
}
}
if specificity(iLongestHost) == specificity(jLongestHost) {
return len(iLongestPath) > len(jLongestPath)
}
return specificity(iLongestHost) > specificity(jLongestHost)
})
// create a subroute for each site in the server block
for _, sblock := range p.serverBlocks {
matcherSetsEnc, err := st.compileEncodedMatcherSets(sblock.block)
if err != nil {
return nil, fmt.Errorf("server block %v: compiling matcher sets: %v", sblock.block.Keys, err)
}
// tls: connection policies and toggle auto HTTPS
autoHTTPSQualifiedHosts, err := st.autoHTTPSHosts(sblock)
if err != nil {
return nil, err
}
if _, ok := sblock.pile["tls.off"]; ok && len(autoHTTPSQualifiedHosts) > 0 {
// tls off: disable TLS (and automatic HTTPS) for server block's names
if srv.AutoHTTPS == nil {
srv.AutoHTTPS = new(caddyhttp.AutoHTTPSConfig)
}
srv.AutoHTTPS.Skip = append(srv.AutoHTTPS.Skip, autoHTTPSQualifiedHosts...)
} else if cpVals, ok := sblock.pile["tls.connection_policy"]; ok {
// tls connection policies
var hasCatchAll bool
for _, cpVal := range cpVals {
cp := cpVal.Value.(*caddytls.ConnectionPolicy)
// make sure the policy covers all hostnames from the block
hosts, err := st.hostsFromServerBlockKeys(sblock.block)
if err != nil {
return nil, err
}
// TODO: are matchers needed if every hostname of the resulting config is matched?
if len(hosts) > 0 {
cp.MatchersRaw = caddy.ModuleMap{
"sni": caddyconfig.JSON(hosts, warnings), // make sure to match all hosts, not just auto-HTTPS-qualified ones
}
} else {
hasCatchAll = true
}
srv.TLSConnPolicies = append(srv.TLSConnPolicies, cp)
}
// a catch-all is necessary to ensure TLS can be offered to
// all hostnames of the server; even though only one policy
// is needed to enable TLS for the server, that policy might
// apply to only certain TLS handshakes; but when using the
// Caddyfile, user would expect all handshakes to at least
// have a matching connection policy, so here we append a
// catch-all/default policy if there isn't one already (it's
// important that it goes at the end) - see issue #3004:
// https://github.com/caddyserver/caddy/issues/3004
if !hasCatchAll {
srv.TLSConnPolicies = append(srv.TLSConnPolicies, new(caddytls.ConnectionPolicy))
}
// TODO: consolidate equal conn policies
}
// exclude any hosts that were defined explicitly with
// "http://" in the key from automated cert management (issue #2998)
for _, key := range sblock.block.Keys {
addr, err := ParseAddress(key)
if err != nil {
return nil, err
}
addr = addr.Normalize()
if addr.Scheme == "http" {
if srv.AutoHTTPS == nil {
srv.AutoHTTPS = new(caddyhttp.AutoHTTPSConfig)
}
if !sliceContains(srv.AutoHTTPS.Skip, addr.Host) {
srv.AutoHTTPS.Skip = append(srv.AutoHTTPS.Skip, addr.Host)
}
}
}
// set up each handler directive, making sure to honor directive order
dirRoutes := sblock.pile["route"]
siteSubroute, err := buildSubroute(dirRoutes, groupCounter)
if err != nil {
return nil, err
}
if len(matcherSetsEnc) == 0 && len(p.serverBlocks) == 1 {
// no need to wrap the handlers in a subroute if this is
// the only server block and there is no matcher for it
srv.Routes = append(srv.Routes, siteSubroute.Routes...)
} else {
srv.Routes = append(srv.Routes, caddyhttp.Route{
MatcherSetsRaw: matcherSetsEnc,
HandlersRaw: []json.RawMessage{
caddyconfig.JSONModuleObject(siteSubroute, "handler", "subroute", warnings),
},
Terminal: true, // only first matching site block should be evaluated
})
}
}
srv.Routes = consolidateRoutes(srv.Routes)
servers[fmt.Sprintf("srv%d", i)] = srv
}
return servers, nil
}
func buildSubroute(routes []ConfigValue, groupCounter counter) (*caddyhttp.Subroute, error) {
for _, val := range routes {
if !directiveIsOrdered(val.directive) {
return nil, fmt.Errorf("directive '%s' is not ordered, so it cannot be used here", val.directive)
}
}
sortRoutes(routes)
subroute := new(caddyhttp.Subroute)
// some directives are mutually exclusive (only first matching
// instance should be evaluated); this is done by putting their
// routes in the same group
mutuallyExclusiveDirs := map[string]*struct {
count int
groupName string
}{
// as a special case, group rewrite directives so that they are mutually exclusive;
// this means that only the first matching rewrite will be evaluated, and that's
// probably a good thing, since there should never be a need to do more than one
// rewrite (I think?), and cascading rewrites smell bad... imagine these rewrites:
// rewrite /docs/json/* /docs/json/index.html
// rewrite /docs/* /docs/index.html
// (We use this on the Caddy website, or at least we did once.) The first rewrite's
// result is also matched by the second rewrite, making the first rewrite pointless.
// See issue #2959.
"rewrite": {},
// handle blocks are also mutually exclusive by definition
"handle": {},
// root just sets a variable, so if it was not mutually exclusive, intersecting
// root directives would overwrite previously-matched ones; they should not cascade
"root": {},
}
for meDir, info := range mutuallyExclusiveDirs {
// see how many instances of the directive there are
for _, r := range routes {
if r.directive == meDir {
info.count++
if info.count > 1 {
break
}
}
}
// if there is more than one, put them in a group
if info.count > 1 {
info.groupName = groupCounter.nextGroup()
}
}
// add all the routes piled in from directives
for _, r := range routes {
// put this route into a group if it is mutually exclusive
if info, ok := mutuallyExclusiveDirs[r.directive]; ok {
route := r.Value.(caddyhttp.Route)
route.Group = info.groupName
r.Value = route
}
switch route := r.Value.(type) {
case caddyhttp.Subroute:
// if a route-class config value is actually a Subroute handler
// with nothing but a list of routes, then it is the intention
// of the directive to keep these handlers together and in this
// same order, but not necessarily in a subroute (if it wanted
// to keep them in a subroute, the directive would have returned
// a route with a Subroute as its handler); this is useful to
// keep multiple handlers/routes together and in the same order
// so that the sorting procedure we did above doesn't reorder them
if route.Errors != nil {
// if error handlers are also set, this is confusing; it's
// probably supposed to be wrapped in a Route and encoded
// as a regular handler route... programmer error.
panic("found subroute with more than just routes; perhaps it should have been wrapped in a route?")
}
subroute.Routes = append(subroute.Routes, route.Routes...)
case caddyhttp.Route:
subroute.Routes = append(subroute.Routes, route)
}
}
subroute.Routes = consolidateRoutes(subroute.Routes)
return subroute, nil
}
func (st ServerType) autoHTTPSHosts(sb serverBlock) ([]string, error) {
// get the hosts for this server block...
hosts, err := st.hostsFromServerBlockKeys(sb.block)
if err != nil {
return nil, err
}
// ...and of those, which ones qualify for auto HTTPS
var autoHTTPSQualifiedHosts []string
for _, h := range hosts {
if certmagic.HostQualifies(h) {
autoHTTPSQualifiedHosts = append(autoHTTPSQualifiedHosts, h)
}
}
return autoHTTPSQualifiedHosts, nil
}
// consolidateRoutes combines routes with the same properties
// (same matchers, same Terminal and Group settings) for a
// cleaner overall output.
func consolidateRoutes(routes caddyhttp.RouteList) caddyhttp.RouteList {
for i := 0; i < len(routes)-1; i++ {
if reflect.DeepEqual(routes[i].MatcherSetsRaw, routes[i+1].MatcherSetsRaw) &&
routes[i].Terminal == routes[i+1].Terminal &&
routes[i].Group == routes[i+1].Group {
// keep the handlers in the same order, then splice out repetitive route
routes[i].HandlersRaw = append(routes[i].HandlersRaw, routes[i+1].HandlersRaw...)
routes = append(routes[:i+1], routes[i+2:]...)
i--
}
}
return routes
}
// consolidateAutomationPolicies combines automation policies that are the same,
// for a cleaner overall output.
func consolidateAutomationPolicies(aps []*caddytls.AutomationPolicy) []*caddytls.AutomationPolicy {
for i := 0; i < len(aps); i++ {
for j := 0; j < len(aps); j++ {
if j == i {
continue
}
// if they're exactly equal in every way, just keep one of them
if reflect.DeepEqual(aps[i], aps[j]) {
aps = append(aps[:j], aps[j+1:]...)
i--
break
}
// if the policy is the same, we can keep just one, but we have
// to be careful which one we keep; if only one has any hostnames
// defined, then we need to keep the one without any hostnames,
// otherwise the one without any hosts (a catch-all) would be
// eaten up by the one with hosts; and if both have hosts, we
// need to combine their lists
if reflect.DeepEqual(aps[i].ManagementRaw, aps[j].ManagementRaw) &&
aps[i].ManageSync == aps[j].ManageSync {
if len(aps[i].Hosts) == 0 && len(aps[j].Hosts) > 0 {
aps = append(aps[:j], aps[j+1:]...)
} else if len(aps[i].Hosts) > 0 && len(aps[j].Hosts) == 0 {
aps = append(aps[:i], aps[i+1:]...)
} else {
aps[i].Hosts = append(aps[i].Hosts, aps[j].Hosts...)
aps = append(aps[:j], aps[j+1:]...)
}
i--
break
}
}
}
// ensure any catch-all policies go last
sort.SliceStable(aps, func(i, j int) bool {
return len(aps[i].Hosts) > len(aps[j].Hosts)
})
return aps
}
func matcherSetFromMatcherToken(
tkn caddyfile.Token,
matcherDefs map[string]caddy.ModuleMap,
warnings *[]caddyconfig.Warning,
) (caddy.ModuleMap, bool, error) {
// matcher tokens can be wildcards, simple path matchers,
// or refer to a pre-defined matcher by some name
if tkn.Text == "*" {
// match all requests == no matchers, so nothing to do
return nil, true, nil
} else if strings.HasPrefix(tkn.Text, "/") {
// convenient way to specify a single path match
return caddy.ModuleMap{
"path": caddyconfig.JSON(caddyhttp.MatchPath{tkn.Text}, warnings),
}, true, nil
} else if strings.HasPrefix(tkn.Text, matcherPrefix) {
// pre-defined matcher
m, ok := matcherDefs[tkn.Text]
if !ok {
return nil, false, fmt.Errorf("unrecognized matcher name: %+v", tkn.Text)
}
return m, true, nil
}
return nil, false, nil
}
func (st *ServerType) compileEncodedMatcherSets(sblock caddyfile.ServerBlock) ([]caddy.ModuleMap, error) {
type hostPathPair struct {
hostm caddyhttp.MatchHost
pathm caddyhttp.MatchPath
}
// keep routes with common host and path matchers together
var matcherPairs []*hostPathPair
for _, key := range sblock.Keys {
addr, err := ParseAddress(key)
if err != nil {
return nil, fmt.Errorf("server block %v: parsing and standardizing address '%s': %v", sblock.Keys, key, err)
}
addr = addr.Normalize()
// choose a matcher pair that should be shared by this
// server block; if none exists yet, create one
var chosenMatcherPair *hostPathPair
for _, mp := range matcherPairs {
if (len(mp.pathm) == 0 && addr.Path == "") ||
(len(mp.pathm) == 1 && mp.pathm[0] == addr.Path) {
chosenMatcherPair = mp
break
}
}
if chosenMatcherPair == nil {
chosenMatcherPair = new(hostPathPair)
if addr.Path != "" {
chosenMatcherPair.pathm = []string{addr.Path}
}
matcherPairs = append(matcherPairs, chosenMatcherPair)
}
// add this server block's keys to the matcher
// pair if it doesn't already exist
if addr.Host != "" {
var found bool
for _, h := range chosenMatcherPair.hostm {
if h == addr.Host {
found = true
break
}
}
if !found {
chosenMatcherPair.hostm = append(chosenMatcherPair.hostm, addr.Host)
}
}
}
// iterate each pairing of host and path matchers and
// put them into a map for JSON encoding
var matcherSets []map[string]caddyhttp.RequestMatcher
for _, mp := range matcherPairs {
matcherSet := make(map[string]caddyhttp.RequestMatcher)
if len(mp.hostm) > 0 {
matcherSet["host"] = mp.hostm
}
if len(mp.pathm) > 0 {
matcherSet["path"] = mp.pathm
}
if len(matcherSet) > 0 {
matcherSets = append(matcherSets, matcherSet)
}
}
// finally, encode each of the matcher sets
var matcherSetsEnc []caddy.ModuleMap
for _, ms := range matcherSets {
msEncoded, err := encodeMatcherSet(ms)
if err != nil {
return nil, fmt.Errorf("server block %v: %v", sblock.Keys, err)
}
matcherSetsEnc = append(matcherSetsEnc, msEncoded)
}
return matcherSetsEnc, nil
}
func parseMatcherDefinitions(d *caddyfile.Dispenser, matchers map[string]caddy.ModuleMap) error {
for d.Next() {
definitionName := d.Val()
if _, ok := matchers[definitionName]; ok {
return fmt.Errorf("matcher is defined more than once: %s", definitionName)
}
matchers[definitionName] = make(caddy.ModuleMap)
// in case there are multiple instances of the same matcher, concatenate
// their tokens (we expect that UnmarshalCaddyfile should be able to
// handle more than one segment); otherwise, we'd overwrite other
// instances of the matcher in this set
tokensByMatcherName := make(map[string][]caddyfile.Token)
for nesting := d.Nesting(); d.NextBlock(nesting); {
matcherName := d.Val()
tokensByMatcherName[matcherName] = append(tokensByMatcherName[matcherName], d.NextSegment()...)
}
for matcherName, tokens := range tokensByMatcherName {
mod, err := caddy.GetModule("http.matchers." + matcherName)
if err != nil {
return fmt.Errorf("getting matcher module '%s': %v", matcherName, err)
}
unm, ok := mod.New().(caddyfile.Unmarshaler)
if !ok {
return fmt.Errorf("matcher module '%s' is not a Caddyfile unmarshaler", matcherName)
}
err = unm.UnmarshalCaddyfile(caddyfile.NewDispenser(tokens))
if err != nil {
return err
}
rm, ok := unm.(caddyhttp.RequestMatcher)
if !ok {
return fmt.Errorf("matcher module '%s' is not a request matcher", matcherName)
}
matchers[definitionName][matcherName] = caddyconfig.JSON(rm, nil)
}
}
return nil
}
func encodeMatcherSet(matchers map[string]caddyhttp.RequestMatcher) (caddy.ModuleMap, error) {
msEncoded := make(caddy.ModuleMap)
for matcherName, val := range matchers {
jsonBytes, err := json.Marshal(val)
if err != nil {
return nil, fmt.Errorf("marshaling matcher set %#v: %v", matchers, err)
}
msEncoded[matcherName] = jsonBytes
}
return msEncoded, nil
}
// tryInt tries to convert val to an integer. If it fails,
// it downgrades the error to a warning and returns 0.
func tryInt(val interface{}, warnings *[]caddyconfig.Warning) int {
intVal, ok := val.(int)
if val != nil && !ok && warnings != nil {
*warnings = append(*warnings, caddyconfig.Warning{Message: "not an integer type"})
}
return intVal
}
// sliceContains returns true if needle is in haystack.
func sliceContains(haystack []string, needle string) bool {
for _, s := range haystack {
if s == needle {
return true
}
}
return false
}
// specifity returns len(s) minus any wildcards (*) and
// placeholders ({...}). Basically, it's a length count
// that penalizes the use of wildcards and placeholders.
// This is useful for comparing hostnames and paths.
// However, wildcards in paths are not a sure answer to
// the question of specificity. For exmaple,
// '*.example.com' is clearly less specific than
// 'a.example.com', but is '/a' more or less specific
// than '/a*'?
func specificity(s string) int {
l := len(s) - strings.Count(s, "*")
for len(s) > 0 {
start := strings.Index(s, "{")
if start < 0 {
return l
}
end := strings.Index(s[start:], "}") + start + 1
if end <= start {
return l
}
l -= end - start
s = s[end:]
}
return l
}
type counter struct {
n *int
}
func (c counter) nextGroup() string {
name := fmt.Sprintf("group%d", *c.n)
*c.n++
return name
}
type matcherSetAndTokens struct {
matcherSet caddy.ModuleMap
tokens []caddyfile.Token
}
// sbAddrAssocation is a mapping from a list of
// addresses to a list of server blocks that are
// served on those addresses.
type sbAddrAssociation struct {
addresses []string
serverBlocks []serverBlock
}
const matcherPrefix = "@"
// Interface guard
var _ caddyfile.ServerType = (*ServerType)(nil)
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