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https://github.com/caddyserver/caddy.git
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httpcaddyfile: fix placeholder shorthands in named routes (#5791)
Co-authored-by: Francis Lavoie <lavofr@gmail.com>
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f2ab7099db
commit
2cac3c5491
3 changed files with 109 additions and 71 deletions
2
.github/workflows/lint.yml
vendored
2
.github/workflows/lint.yml
vendored
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@ -56,3 +56,5 @@ jobs:
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steps:
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- name: govulncheck
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uses: golang/govulncheck-action@v1
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with:
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check-latest: true
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@ -18,7 +18,6 @@ import (
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"encoding/json"
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"fmt"
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"reflect"
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"regexp"
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"sort"
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"strconv"
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"strings"
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@ -82,46 +81,18 @@ func (st ServerType) Setup(
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return nil, warnings, err
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}
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originalServerBlocks, err = st.extractNamedRoutes(originalServerBlocks, options, &warnings)
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// this will replace both static and user-defined placeholder shorthands
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// with actual identifiers used by Caddy
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replacer := NewShorthandReplacer()
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originalServerBlocks, err = st.extractNamedRoutes(originalServerBlocks, options, &warnings, replacer)
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if err != nil {
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return nil, warnings, err
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}
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// replace shorthand placeholders (which are convenient
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// when writing a Caddyfile) with their actual placeholder
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// identifiers or variable names
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replacer := strings.NewReplacer(placeholderShorthands()...)
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// these are placeholders that allow a user-defined final
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// parameters, but we still want to provide a shorthand
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// for those, so we use a regexp to replace
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regexpReplacements := []struct {
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search *regexp.Regexp
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replace string
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}{
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{regexp.MustCompile(`{header\.([\w-]*)}`), "{http.request.header.$1}"},
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{regexp.MustCompile(`{cookie\.([\w-]*)}`), "{http.request.cookie.$1}"},
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{regexp.MustCompile(`{labels\.([\w-]*)}`), "{http.request.host.labels.$1}"},
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{regexp.MustCompile(`{path\.([\w-]*)}`), "{http.request.uri.path.$1}"},
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{regexp.MustCompile(`{file\.([\w-]*)}`), "{http.request.uri.path.file.$1}"},
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{regexp.MustCompile(`{query\.([\w-]*)}`), "{http.request.uri.query.$1}"},
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{regexp.MustCompile(`{re\.([\w-]*)\.([\w-]*)}`), "{http.regexp.$1.$2}"},
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{regexp.MustCompile(`{vars\.([\w-]*)}`), "{http.vars.$1}"},
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{regexp.MustCompile(`{rp\.([\w-\.]*)}`), "{http.reverse_proxy.$1}"},
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{regexp.MustCompile(`{err\.([\w-\.]*)}`), "{http.error.$1}"},
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{regexp.MustCompile(`{file_match\.([\w-]*)}`), "{http.matchers.file.$1}"},
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}
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for _, sb := range originalServerBlocks {
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for _, segment := range sb.block.Segments {
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for i := 0; i < len(segment); i++ {
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// simple string replacements
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segment[i].Text = replacer.Replace(segment[i].Text)
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// complex regexp replacements
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for _, r := range regexpReplacements {
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segment[i].Text = r.search.ReplaceAllString(segment[i].Text, r.replace)
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}
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}
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for i := range sb.block.Segments {
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replacer.ApplyToSegment(&sb.block.Segments[i])
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}
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if len(sb.block.Keys) == 0 {
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@ -452,6 +423,7 @@ func (ServerType) extractNamedRoutes(
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serverBlocks []serverBlock,
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options map[string]any,
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warnings *[]caddyconfig.Warning,
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replacer ShorthandReplacer,
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) ([]serverBlock, error) {
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namedRoutes := map[string]*caddyhttp.Route{}
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@ -477,11 +449,14 @@ func (ServerType) extractNamedRoutes(
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continue
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}
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// zip up all the segments since ParseSegmentAsSubroute
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// was designed to take a directive+
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wholeSegment := caddyfile.Segment{}
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for _, segment := range sb.block.Segments {
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wholeSegment = append(wholeSegment, segment...)
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for i := range sb.block.Segments {
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// replace user-defined placeholder shorthands in extracted named routes
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replacer.ApplyToSegment(&sb.block.Segments[i])
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// zip up all the segments since ParseSegmentAsSubroute
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// was designed to take a directive+
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wholeSegment = append(wholeSegment, sb.block.Segments[i]...)
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}
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h := Helper{
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@ -1449,37 +1424,6 @@ func encodeMatcherSet(matchers map[string]caddyhttp.RequestMatcher) (caddy.Modul
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return msEncoded, nil
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}
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// placeholderShorthands returns a slice of old-new string pairs,
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// where the left of the pair is a placeholder shorthand that may
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// be used in the Caddyfile, and the right is the replacement.
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func placeholderShorthands() []string {
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return []string{
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"{dir}", "{http.request.uri.path.dir}",
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"{file}", "{http.request.uri.path.file}",
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"{host}", "{http.request.host}",
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"{hostport}", "{http.request.hostport}",
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"{port}", "{http.request.port}",
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"{method}", "{http.request.method}",
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"{path}", "{http.request.uri.path}",
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"{query}", "{http.request.uri.query}",
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"{remote}", "{http.request.remote}",
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"{remote_host}", "{http.request.remote.host}",
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"{remote_port}", "{http.request.remote.port}",
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"{scheme}", "{http.request.scheme}",
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"{uri}", "{http.request.uri}",
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"{tls_cipher}", "{http.request.tls.cipher_suite}",
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"{tls_version}", "{http.request.tls.version}",
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"{tls_client_fingerprint}", "{http.request.tls.client.fingerprint}",
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"{tls_client_issuer}", "{http.request.tls.client.issuer}",
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"{tls_client_serial}", "{http.request.tls.client.serial}",
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"{tls_client_subject}", "{http.request.tls.client.subject}",
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"{tls_client_certificate_pem}", "{http.request.tls.client.certificate_pem}",
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"{tls_client_certificate_der_base64}", "{http.request.tls.client.certificate_der_base64}",
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"{upstream_hostport}", "{http.reverse_proxy.upstream.hostport}",
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"{client_ip}", "{http.vars.client_ip}",
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}
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}
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// WasReplacedPlaceholderShorthand checks if a token string was
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// likely a replaced shorthand of the known Caddyfile placeholder
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// replacement outputs. Useful to prevent some user-defined map
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92
caddyconfig/httpcaddyfile/shorthands.go
Normal file
92
caddyconfig/httpcaddyfile/shorthands.go
Normal file
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@ -0,0 +1,92 @@
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package httpcaddyfile
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import (
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"regexp"
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"strings"
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"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
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)
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type ComplexShorthandReplacer struct {
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search *regexp.Regexp
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replace string
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}
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type ShorthandReplacer struct {
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complex []ComplexShorthandReplacer
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simple *strings.Replacer
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}
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func NewShorthandReplacer() ShorthandReplacer {
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// replace shorthand placeholders (which are convenient
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// when writing a Caddyfile) with their actual placeholder
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// identifiers or variable names
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replacer := strings.NewReplacer(placeholderShorthands()...)
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// these are placeholders that allow a user-defined final
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// parameters, but we still want to provide a shorthand
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// for those, so we use a regexp to replace
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regexpReplacements := []ComplexShorthandReplacer{
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{regexp.MustCompile(`{header\.([\w-]*)}`), "{http.request.header.$1}"},
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{regexp.MustCompile(`{cookie\.([\w-]*)}`), "{http.request.cookie.$1}"},
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{regexp.MustCompile(`{labels\.([\w-]*)}`), "{http.request.host.labels.$1}"},
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{regexp.MustCompile(`{path\.([\w-]*)}`), "{http.request.uri.path.$1}"},
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{regexp.MustCompile(`{file\.([\w-]*)}`), "{http.request.uri.path.file.$1}"},
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{regexp.MustCompile(`{query\.([\w-]*)}`), "{http.request.uri.query.$1}"},
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{regexp.MustCompile(`{re\.([\w-]*)\.([\w-]*)}`), "{http.regexp.$1.$2}"},
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{regexp.MustCompile(`{vars\.([\w-]*)}`), "{http.vars.$1}"},
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{regexp.MustCompile(`{rp\.([\w-\.]*)}`), "{http.reverse_proxy.$1}"},
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{regexp.MustCompile(`{err\.([\w-\.]*)}`), "{http.error.$1}"},
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{regexp.MustCompile(`{file_match\.([\w-]*)}`), "{http.matchers.file.$1}"},
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}
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return ShorthandReplacer{
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complex: regexpReplacements,
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simple: replacer,
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}
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}
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// placeholderShorthands returns a slice of old-new string pairs,
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// where the left of the pair is a placeholder shorthand that may
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// be used in the Caddyfile, and the right is the replacement.
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func placeholderShorthands() []string {
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return []string{
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"{dir}", "{http.request.uri.path.dir}",
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"{file}", "{http.request.uri.path.file}",
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"{host}", "{http.request.host}",
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"{hostport}", "{http.request.hostport}",
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"{port}", "{http.request.port}",
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"{method}", "{http.request.method}",
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"{path}", "{http.request.uri.path}",
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"{query}", "{http.request.uri.query}",
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"{remote}", "{http.request.remote}",
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"{remote_host}", "{http.request.remote.host}",
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"{remote_port}", "{http.request.remote.port}",
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"{scheme}", "{http.request.scheme}",
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"{uri}", "{http.request.uri}",
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"{tls_cipher}", "{http.request.tls.cipher_suite}",
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"{tls_version}", "{http.request.tls.version}",
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"{tls_client_fingerprint}", "{http.request.tls.client.fingerprint}",
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"{tls_client_issuer}", "{http.request.tls.client.issuer}",
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"{tls_client_serial}", "{http.request.tls.client.serial}",
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"{tls_client_subject}", "{http.request.tls.client.subject}",
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"{tls_client_certificate_pem}", "{http.request.tls.client.certificate_pem}",
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"{tls_client_certificate_der_base64}", "{http.request.tls.client.certificate_der_base64}",
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"{upstream_hostport}", "{http.reverse_proxy.upstream.hostport}",
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"{client_ip}", "{http.vars.client_ip}",
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}
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}
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// ApplyToSegment replaces shorthand placeholder to its full placeholder, understandable by Caddy.
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func (s ShorthandReplacer) ApplyToSegment(segment *caddyfile.Segment) {
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if segment != nil {
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for i := 0; i < len(*segment); i++ {
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// simple string replacements
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(*segment)[i].Text = s.simple.Replace((*segment)[i].Text)
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// complex regexp replacements
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for _, r := range s.complex {
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(*segment)[i].Text = r.search.ReplaceAllString((*segment)[i].Text, r.replace)
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}
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}
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}
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}
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