mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-16 21:56:40 -05:00
ResponseMatcher for conditional logic of response headers
This commit is contained in:
parent
da6a8cfc86
commit
bf54615efc
3 changed files with 194 additions and 3 deletions
|
@ -33,16 +33,18 @@ type HeaderOps struct {
|
|||
// optionally deferred until response time.
|
||||
type RespHeaderOps struct {
|
||||
*HeaderOps
|
||||
Deferred bool `json:"deferred"`
|
||||
Require *caddyhttp.ResponseMatcher `json:"require,omitempty"`
|
||||
Deferred bool `json:"deferred,omitempty"`
|
||||
}
|
||||
|
||||
func (h Headers) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
|
||||
repl := r.Context().Value(caddy2.ReplacerCtxKey).(caddy2.Replacer)
|
||||
apply(h.Request, r.Header, repl)
|
||||
if h.Response.Deferred {
|
||||
if h.Response.Deferred || h.Response.Require != nil {
|
||||
w = &responseWriterWrapper{
|
||||
ResponseWriterWrapper: &caddyhttp.ResponseWriterWrapper{ResponseWriter: w},
|
||||
replacer: repl,
|
||||
require: h.Response.Require,
|
||||
headerOps: h.Response.HeaderOps,
|
||||
}
|
||||
} else {
|
||||
|
@ -75,6 +77,7 @@ func apply(ops *HeaderOps, hdr http.Header, repl caddy2.Replacer) {
|
|||
type responseWriterWrapper struct {
|
||||
*caddyhttp.ResponseWriterWrapper
|
||||
replacer caddy2.Replacer
|
||||
require *caddyhttp.ResponseMatcher
|
||||
headerOps *HeaderOps
|
||||
wroteHeader bool
|
||||
}
|
||||
|
@ -91,7 +94,9 @@ func (rww *responseWriterWrapper) WriteHeader(status int) {
|
|||
return
|
||||
}
|
||||
rww.wroteHeader = true
|
||||
if rww.require == nil || rww.require.Match(status, rww.ResponseWriterWrapper.Header()) {
|
||||
apply(rww.headerOps, rww.ResponseWriterWrapper.Header(), rww.replacer)
|
||||
}
|
||||
rww.ResponseWriterWrapper.WriteHeader(status)
|
||||
}
|
||||
|
||||
|
|
|
@ -298,6 +298,61 @@ func (mre *MatchRegexp) Match(input string, repl caddy2.Replacer, scope string)
|
|||
return true
|
||||
}
|
||||
|
||||
// ResponseMatcher is a type which can determine if a given response
|
||||
// status code and its headers match some criteria.
|
||||
type ResponseMatcher struct {
|
||||
// If set, one of these status codes would be required.
|
||||
// A one-digit status can be used to represent all codes
|
||||
// in that class (e.g. 3 for all 3xx codes).
|
||||
StatusCode []int `json:"status_code,omitempty"`
|
||||
|
||||
// If set, each header specified must be one of the specified values.
|
||||
Headers http.Header `json:"headers,omitempty"`
|
||||
}
|
||||
|
||||
// Match returns true if the given statusCode and hdr match rm.
|
||||
func (rm ResponseMatcher) Match(statusCode int, hdr http.Header) bool {
|
||||
if !rm.matchStatusCode(statusCode) {
|
||||
return false
|
||||
}
|
||||
return rm.matchHeaders(hdr)
|
||||
}
|
||||
|
||||
func (rm ResponseMatcher) matchStatusCode(statusCode int) bool {
|
||||
if rm.StatusCode == nil {
|
||||
return true
|
||||
}
|
||||
for _, code := range rm.StatusCode {
|
||||
if statusCode == code {
|
||||
return true
|
||||
}
|
||||
if code < 100 && statusCode >= code*100 && statusCode < (code+1)*100 {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (rm ResponseMatcher) matchHeaders(hdr http.Header) bool {
|
||||
for field, allowedFieldVals := range rm.Headers {
|
||||
var match bool
|
||||
actualFieldVals := hdr[textproto.CanonicalMIMEHeaderKey(field)]
|
||||
fieldVals:
|
||||
for _, actualFieldVal := range actualFieldVals {
|
||||
for _, allowedFieldVal := range allowedFieldVals {
|
||||
if actualFieldVal == allowedFieldVal {
|
||||
match = true
|
||||
break fieldVals
|
||||
}
|
||||
}
|
||||
}
|
||||
if !match {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
var wordRE = regexp.MustCompile(`\w+`)
|
||||
|
||||
// Interface guards
|
||||
|
|
|
@ -368,3 +368,134 @@ func TestHeaderREMatcher(t *testing.T) {
|
|||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestResponseMatcher(t *testing.T) {
|
||||
for i, tc := range []struct {
|
||||
require ResponseMatcher
|
||||
status int
|
||||
hdr http.Header // make sure these are canonical cased (std lib will do that in a real request)
|
||||
expect bool
|
||||
}{
|
||||
{
|
||||
require: ResponseMatcher{},
|
||||
status: 200,
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{200},
|
||||
},
|
||||
status: 200,
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{2},
|
||||
},
|
||||
status: 200,
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{201},
|
||||
},
|
||||
status: 200,
|
||||
expect: false,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{2},
|
||||
},
|
||||
status: 301,
|
||||
expect: false,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{3},
|
||||
},
|
||||
status: 301,
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{3},
|
||||
},
|
||||
status: 399,
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{3},
|
||||
},
|
||||
status: 400,
|
||||
expect: false,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{3, 4},
|
||||
},
|
||||
status: 400,
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
StatusCode: []int{3, 401},
|
||||
},
|
||||
status: 401,
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
Headers: http.Header{
|
||||
"Foo": []string{"bar"},
|
||||
},
|
||||
},
|
||||
hdr: http.Header{"Foo": []string{"bar"}},
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
Headers: http.Header{
|
||||
"Foo2": []string{"bar"},
|
||||
},
|
||||
},
|
||||
hdr: http.Header{"Foo": []string{"bar"}},
|
||||
expect: false,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
Headers: http.Header{
|
||||
"Foo": []string{"bar", "baz"},
|
||||
},
|
||||
},
|
||||
hdr: http.Header{"Foo": []string{"baz"}},
|
||||
expect: true,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
Headers: http.Header{
|
||||
"Foo": []string{"bar"},
|
||||
"Foo2": []string{"baz"},
|
||||
},
|
||||
},
|
||||
hdr: http.Header{"Foo": []string{"baz"}},
|
||||
expect: false,
|
||||
},
|
||||
{
|
||||
require: ResponseMatcher{
|
||||
Headers: http.Header{
|
||||
"Foo": []string{"bar"},
|
||||
"Foo2": []string{"baz"},
|
||||
},
|
||||
},
|
||||
hdr: http.Header{"Foo": []string{"bar"}, "Foo2": []string{"baz"}},
|
||||
expect: true,
|
||||
},
|
||||
} {
|
||||
actual := tc.require.Match(tc.status, tc.hdr)
|
||||
if actual != tc.expect {
|
||||
t.Errorf("Test %d %v: Expected %t, got %t for HTTP %d %v", i, tc.require, tc.expect, actual, tc.status, tc.hdr)
|
||||
continue
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue