/
router.go
78 lines (64 loc) · 2.3 KB
/
router.go
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// Copyright 2017 clair 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 api
import (
"net/http"
"strings"
"github.com/julienschmidt/httprouter"
log "github.com/sirupsen/logrus"
"github.com/coreos/clair/api/v1"
"github.com/coreos/clair/database"
)
// router is an HTTP router that forwards requests to the appropriate sub-router
// depending on the API version specified in the request URI.
type router map[string]*httprouter.Router
// Let's hope we never have more than 99 API versions.
const apiVersionLength = len("v99")
func newAPIHandler(cfg *Config, store database.Datastore) http.Handler {
router := make(router)
router["/v1"] = v1.NewRouter(store, cfg.PaginationKey)
return router
}
func (rtr router) ServeHTTP(w http.ResponseWriter, r *http.Request) {
urlStr := r.URL.String()
var version string
if len(urlStr) >= apiVersionLength {
version = urlStr[:apiVersionLength]
}
if router, _ := rtr[version]; router != nil {
// Remove the version number from the request path to let the router do its
// job but do not update the RequestURI
r.URL.Path = strings.Replace(r.URL.Path, version, "", 1)
router.ServeHTTP(w, r)
return
}
log.WithFields(log.Fields{"status": http.StatusNotFound, "method": r.Method, "request uri": r.RequestURI, "remote addr": r.RemoteAddr}).Info("Served HTTP request")
http.NotFound(w, r)
}
func newHealthHandler(store database.Datastore) http.Handler {
router := httprouter.New()
router.GET("/health", healthHandler(store))
return router
}
func healthHandler(store database.Datastore) httprouter.Handle {
return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
header := w.Header()
header.Set("Server", "clair")
status := http.StatusInternalServerError
if store.Ping() {
status = http.StatusOK
}
w.WriteHeader(status)
}
}