Merge pull request #78 from lalex/header_auth

Allow to auth with the X-ClickHouse-User header

Author: hagen1778

proxy_test.go

@@ -349,6 +349,42 @@ func TestReverseProxy_ServeHTTP1(t *testing.T) {
 				return makeCustomRequest(p, req)
 			},
 		},
+		{
+			cfg:           authCfg,
+			name:          "headers auth ok",
+			expResponse:   okResponse,
+			expStatusCode: http.StatusOK,
+			f: func(p *reverseProxy) *http.Response {
+				req := httptest.NewRequest("POST", fakeServer.URL, nil)
+				req.Header.Set("X-ClickHouse-User", "foo")
+				req.Header.Set("X-ClickHouse-Key", "bar")
+				return makeCustomRequest(p, req)
+			},
+		},
+		{
+			cfg:           authCfg,
+			name:          "header auth wrong name",
+			expResponse:   "invalid username or password for user \"fooo\"",
+			expStatusCode: http.StatusUnauthorized,
+			f: func(p *reverseProxy) *http.Response {
+				req := httptest.NewRequest("POST", fakeServer.URL, nil)
+				req.Header.Set("X-ClickHouse-User", "fooo")
+				req.Header.Set("X-ClickHouse-Key", "bar")
+				return makeCustomRequest(p, req)
+			},
+		},
+		{
+			cfg:           authCfg,
+			name:          "header auth wrong name",
+			expResponse:   "invalid username or password for user \"foo\"",
+			expStatusCode: http.StatusUnauthorized,
+			f: func(p *reverseProxy) *http.Response {
+				req := httptest.NewRequest("POST", fakeServer.URL, nil)
+				req.Header.Set("X-ClickHouse-User", "foo")
+				req.Header.Set("X-ClickHouse-Key", "baar")
+				return makeCustomRequest(p, req)
+			},
+		},
 	}
 
 	for _, tc := range testCases {

scope.go

@@ -355,6 +355,10 @@ func (s *scope) decorateRequest(req *http.Request) (*http.Request, url.Values) {
 	// Rewrite possible previous Basic Auth and send request
 	// as cluster user.
 	req.SetBasicAuth(s.clusterUser.name, s.clusterUser.password)
+	// Delete possible X-ClickHouse headers,
+	// it is not allowed to use X-ClickHouse HTTP headers and other authentication methods simultaneously
+	req.Header.Del("X-ClickHouse-User")
+	req.Header.Del("X-ClickHouse-Key")
 
 	// Send request to the chosen host from cluster.
 	req.URL.Scheme = s.host.addr.Scheme

utils.go

@@ -21,8 +21,15 @@ func respondWith(rw http.ResponseWriter, err error, status int) {
 }
 
 // getAuth retrieves auth credentials from request
-// according to CH documentation @see "http://clickhouse.readthedocs.io/en/latest/reference_en.html#HTTP interface"
+// according to CH documentation @see "https://clickhouse.yandex/docs/en/interfaces/http/"
 func getAuth(req *http.Request) (string, string) {
+	// check X-ClickHouse- headers
+	name := req.Header.Get("X-ClickHouse-User")
+	pass := req.Header.Get("X-ClickHouse-Key")
+	if name != "" {
+		return name, pass
+	}
+	// if header is empty - check basicAuth
 	if name, pass, ok := req.BasicAuth(); ok {
 		return name, pass
 	}