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asset.go
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asset.go
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package origin
import (
"crypto/tls"
"fmt"
"net/http"
"net/url"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/elazarl/go-bindata-assetfs"
"github.com/emicklei/go-restful"
"github.com/golang/glog"
"github.com/openshift/origin/pkg/assets"
configapi "github.com/openshift/origin/pkg/cmd/server/api"
cmdutil "github.com/openshift/origin/pkg/cmd/util"
"github.com/openshift/origin/pkg/version"
)
// InstallAPI adds handlers for serving static assets into the provided mux,
// then returns an array of strings indicating what endpoints were started
// (these are format strings that will expect to be sent a single string value).
func (c *AssetConfig) InstallAPI(container *restful.Container) []string {
assetHandler, err := c.buildHandler()
if err != nil {
glog.Fatal(err)
}
publicURL, err := url.Parse(c.Options.PublicURL)
if err != nil {
glog.Fatal(err)
}
mux := container.ServeMux
mux.Handle(publicURL.Path, http.StripPrefix(publicURL.Path, assetHandler))
return []string{fmt.Sprintf("Started OpenShift UI %%s%s", publicURL.Path)}
}
// Run starts an http server for the static assets listening on the configured
// bind address
func (c *AssetConfig) Run() {
assetHandler, err := c.buildHandler()
if err != nil {
glog.Fatal(err)
}
publicURL, err := url.Parse(c.Options.PublicURL)
if err != nil {
glog.Fatal(err)
}
mux := http.NewServeMux()
mux.Handle(publicURL.Path, http.StripPrefix(publicURL.Path, assetHandler))
if publicURL.Path != "/" {
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
http.Redirect(w, req, publicURL.Path, http.StatusFound)
})
}
server := &http.Server{
Addr: c.Options.ServingInfo.BindAddress,
Handler: mux,
ReadTimeout: 5 * time.Minute,
WriteTimeout: 5 * time.Minute,
MaxHeaderBytes: 1 << 20,
}
isTLS := configapi.UseTLS(c.Options.ServingInfo)
go util.Forever(func() {
if isTLS {
server.TLSConfig = &tls.Config{
// Change default from SSLv3 to TLSv1.0 (because of POODLE vulnerability)
MinVersion: tls.VersionTLS10,
}
glog.Infof("OpenShift UI listening at https://%s", c.Options.ServingInfo.BindAddress)
glog.Fatal(server.ListenAndServeTLS(c.Options.ServingInfo.ServerCert.CertFile, c.Options.ServingInfo.ServerCert.KeyFile))
} else {
glog.Infof("OpenShift UI listening at http://%s", c.Options.ServingInfo.BindAddress)
glog.Fatal(server.ListenAndServe())
}
}, 0)
// Attempt to verify the server came up for 20 seconds (100 tries * 100ms, 100ms timeout per try)
cmdutil.WaitForSuccessfulDial(isTLS, "tcp", c.Options.ServingInfo.BindAddress, 100*time.Millisecond, 100*time.Millisecond, 100)
glog.Infof("OpenShift UI available at %s", c.Options.PublicURL)
}
func (c *AssetConfig) buildHandler() (http.Handler, error) {
assets.RegisterMimeTypes()
masterURL, err := url.Parse(c.Options.MasterPublicURL)
if err != nil {
return nil, err
}
publicURL, err := url.Parse(c.Options.PublicURL)
if err != nil {
glog.Fatal(err)
}
config := assets.WebConsoleConfig{
MasterAddr: masterURL.Host,
MasterPrefix: OpenShiftAPIPrefix,
KubernetesAddr: masterURL.Host,
KubernetesPrefix: KubernetesAPIPrefix,
OAuthAuthorizeURI: OpenShiftOAuthAuthorizeURL(masterURL.String()),
OAuthRedirectBase: c.Options.PublicURL,
OAuthClientID: OpenShiftWebConsoleClientID,
LogoutURI: c.Options.LogoutURL,
}
handler := http.FileServer(
&assetfs.AssetFS{
assets.Asset,
assets.AssetDir,
"",
},
)
handler, err = assets.HTML5ModeHandler(publicURL.Path, handler)
if err != nil {
return nil, err
}
// Cache control should happen after all Vary headers are added, but before
// any asset related routing (HTML5ModeHandler and FileServer)
handler = assets.CacheControlHandler(version.Get().GitCommit, handler)
// Generated config.js can not be cached since it changes depending on startup options
handler = assets.GeneratedConfigHandler(config, handler)
// Gzip first so that inner handlers can react to the addition of the Vary header
handler = assets.GzipHandler(handler)
return handler, nil
}