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identity_vm.go
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/
identity_vm.go
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// Copyright 2011 Google Inc. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package internal
import (
"net/http"
"os"
)
// These functions are implementations of the wrapper functions
// in ../appengine/identity.go. See that file for commentary.
const (
hDefaultVersionHostname = "X-AppEngine-Default-Version-Hostname"
hRequestLogId = "X-AppEngine-Request-Log-Id"
hDatacenter = "X-AppEngine-Datacenter"
)
func DefaultVersionHostname(req interface{}) string {
return req.(*http.Request).Header.Get(hDefaultVersionHostname)
}
func RequestID(req interface{}) string {
return req.(*http.Request).Header.Get(hRequestLogId)
}
func Datacenter(req interface{}) string {
return req.(*http.Request).Header.Get(hDatacenter)
}
func ServerSoftware() string {
// TODO(dsymonds): Remove fallback when we've verified this.
if s := os.Getenv("SERVER_SOFTWARE"); s != "" {
return s
}
return "Google App Engine/1.x.x"
}
// TODO(dsymonds): Remove the metadata fetches.
func ModuleName() string {
if s := os.Getenv("GAE_MODULE_NAME"); s != "" {
return s
}
return string(mustGetMetadata("instance/attributes/gae_backend_name"))
}
func VersionID() string {
if s := os.Getenv("GAE_MODULE_VERSION"); s != "" {
return s
}
return string(mustGetMetadata("instance/attributes/gae_backend_version"))
}
func InstanceID() string {
if s := os.Getenv("GAE_MODULE_INSTANCE"); s != "" {
return s
}
return string(mustGetMetadata("instance/attributes/gae_backend_instance"))
}
func partitionlessAppID() string {
// gae_project has everything except the partition prefix.
appID := os.Getenv("GAE_LONG_APP_ID")
if appID == "" {
appID = string(mustGetMetadata("instance/attributes/gae_project"))
}
return appID
}
func fullyQualifiedAppID() string {
appID := partitionlessAppID()
part := os.Getenv("GAE_PARTITION")
if part == "" {
part = string(mustGetMetadata("instance/attributes/gae_partition"))
}
if part != "" {
appID = part + "~" + appID
}
return appID
}