Cadoles/bouncer
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feat(rewriter): pass structured url to ease request rewriting
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This commit is contained in:
wpetit 2024-06-28 10:46:38 +02:00
parent 3c1939f418
commit c73fe8cca5
4 changed files with 116 additions and 16 deletions
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16
doc/fr/references/layers/rewriter.md
View File

@ -66,7 +66,21 @@ La requête en cours de traitement.
{
method: "string", // Méthode HTTP
host: "string", // Nom d'hôte (`Host`) associé à la requête
url: "string", // URL associée à la requête
url: { // URL associée à la requête sous sa forme structurée
"scheme": "string", // Schéma HTTP de l'URL
"opaque": "string", // Données opaque de l'URL
"user": { // Identifiants d'URL (Basic Auth)
"username": "",
"password": ""
},
"host": "string", // Nom d'hôte (<domaine>:<port>) de l'URL
"path": "string", // Chemin de l'URL (format assaini)
"rawPath": "string", // Chemin de l'URL (format brut)
"rawQuery": "string", // Variables d'URL (format brut)
"fragment" : "string", // Fragment d'URL (format assaini)
"rawFragment" : "string" // Fragment d'URL (format brut)
},
rawUrl: "string", // URL associée à la requête (format assaini)
proto: "string", // Numéro de version du protocole utilisé
protoMajor: "int", // Numéro de version majeure du protocole utilisé
protoMinor: "int", // Numéro de version mineur du protocole utilisé

2
internal/proxy/director/layer/rewriter/layer.go
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@ -74,7 +74,7 @@ func (l *Layer) ResponseTransformer(layer *store.Layer) proxy.ResponseTransforme
}
}
func New() *Layer {
func New(funcs ...OptionFunc) *Layer {
return &Layer{}
}

16
internal/proxy/director/layer/rewriter/options.go Normal file
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@ -0,0 +1,16 @@
package rewriter
type Options struct {
}
type OptionFunc func(opts *Options)
func NewOptions(funcs ...OptionFunc) *Options {
opts := &Options{}
for _, fn := range funcs {
fn(opts)
}
return opts
}

98
internal/proxy/director/layer/rewriter/rules.go
View File

@ -12,9 +12,27 @@ type RequestEnv struct {
Request RequestInfo `expr:"request"`
}
type URLEnv struct {
Scheme string `expr:"scheme"`
Opaque string `expr:"opaque"`
User UserInfoEnv `expr:"user"`
Host string `expr:"host"`
Path string `expr:"path"`
RawPath string `expr:"rawPath"`
RawQuery string `expr:"rawQuery"`
Fragment string `expr:"fragment"`
RawFragment string `expr:"rawFragment"`
}
type UserInfoEnv struct {
Username string `expr:"username"`
Password string `expr:"password"`
}
type RequestInfo struct {
Method string `expr:"method"`
URL string `expr:"url"`
URL URLEnv `expr:"url"`
RawURL string `expr:"rawUrl"`
Proto string `expr:"proto"`
ProtoMajor int `expr:"protoMajor"`
ProtoMinor int `expr:"protoMinor"`
@ -33,18 +51,32 @@ func (l *Layer) applyRequestRules(r *http.Request, options *LayerOptions) error
return nil
}
engine, err := rule.NewEngine[*RequestEnv](
ruleHTTP.WithRequestFuncs(r),
rule.WithRules(options.Rules.Request...),
)
engine, err := l.getRequestRuleEngine(r, options)
if err != nil {
return errors.WithStack(err)
}
env := &RequestEnv{
Request: RequestInfo{
Method: r.Method,
URL: r.URL.String(),
Method: r.Method,
URL: URLEnv{
Scheme: r.URL.Scheme,
Opaque: r.URL.Opaque,
User: UserInfoEnv{
Username: r.URL.User.Username(),
Password: func() string {
passwd, _ := r.URL.User.Password()
return passwd
}(),
},
Host: r.URL.Host,
Path: r.URL.Path,
RawPath: r.URL.RawPath,
RawQuery: r.URL.RawQuery,
Fragment: r.URL.Fragment,
RawFragment: r.URL.RawFragment,
},
RawURL: r.URL.String(),
Proto: r.Proto,
ProtoMajor: r.ProtoMajor,
ProtoMinor: r.ProtoMinor,
@ -65,6 +97,18 @@ func (l *Layer) applyRequestRules(r *http.Request, options *LayerOptions) error
return nil
}
func (l *Layer) getRequestRuleEngine(r *http.Request, options *LayerOptions) (*rule.Engine[*RequestEnv], error) {
engine, err := rule.NewEngine[*RequestEnv](
rule.WithRules(options.Rules.Request...),
ruleHTTP.WithRequestFuncs(r),
)
if err != nil {
return nil, errors.WithStack(err)
}
return engine, nil
}
type ResponseEnv struct {
Request RequestInfo `expr:"request"`
Response ResponseInfo `expr:"response"`
@ -84,23 +128,37 @@ type ResponseInfo struct {
}
func (l *Layer) applyResponseRules(r *http.Response, options *LayerOptions) error {
rules := options.Rules.Request
rules := options.Rules.Response
if len(rules) == 0 {
return nil
}
engine, err := rule.NewEngine[*ResponseEnv](
rule.WithRules(options.Rules.Response...),
ruleHTTP.WithResponseFuncs(r),
)
engine, err := l.getResponseRuleEngine(r, options)
if err != nil {
return errors.WithStack(err)
}
env := &ResponseEnv{
Request: RequestInfo{
Method: r.Request.Method,
URL: r.Request.URL.String(),
Method: r.Request.Method,
URL: URLEnv{
Scheme: r.Request.URL.Scheme,
Opaque: r.Request.URL.Opaque,
User: UserInfoEnv{
Username: r.Request.URL.User.Username(),
Password: func() string {
passwd, _ := r.Request.URL.User.Password()
return passwd
}(),
},
Host: r.Request.URL.Host,
Path: r.Request.URL.Path,
RawPath: r.Request.URL.RawPath,
RawQuery: r.Request.URL.RawQuery,
Fragment: r.Request.URL.Fragment,
RawFragment: r.Request.URL.RawFragment,
},
RawURL: r.Request.URL.String(),
Proto: r.Request.Proto,
ProtoMajor: r.Request.ProtoMajor,
ProtoMinor: r.Request.ProtoMinor,
@ -131,3 +189,15 @@ func (l *Layer) applyResponseRules(r *http.Response, options *LayerOptions) erro
return nil
}
func (l *Layer) getResponseRuleEngine(r *http.Response, options *LayerOptions) (*rule.Engine[*ResponseEnv], error) {
engine, err := rule.NewEngine[*ResponseEnv](
rule.WithRules(options.Rules.Response...),
ruleHTTP.WithResponseFuncs(r),
)
if err != nil {
return nil, errors.WithStack(err)
}
return engine, nil
}