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e204d863a5
* Update Kubernetes to v1.22.1 * Update dependent modules to track with upstream Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
80 lines
2.8 KiB
Go
80 lines
2.8 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package genericclioptions
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import (
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"net/http"
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"strings"
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"github.com/google/uuid"
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"github.com/spf13/cobra"
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)
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const (
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kubectlCommandHeader = "Kubectl-Command"
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kubectlSessionHeader = "Kubectl-Session"
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)
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// CommandHeaderRoundTripper adds a layer around the standard
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// round tripper to add Request headers before delegation. Implements
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// the go standard library "http.RoundTripper" interface.
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type CommandHeaderRoundTripper struct {
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Delegate http.RoundTripper
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Headers map[string]string
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}
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// CommandHeaderRoundTripper adds Request headers before delegating to standard
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// round tripper. These headers are kubectl command headers which
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// detail the kubectl command. See SIG CLI KEP 859:
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// https://github.com/kubernetes/enhancements/tree/master/keps/sig-cli/859-kubectl-headers
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func (c *CommandHeaderRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
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for header, value := range c.Headers {
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req.Header.Set(header, value)
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}
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return c.Delegate.RoundTrip(req)
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}
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// ParseCommandHeaders fills in a map of custom headers into the CommandHeaderRoundTripper. These
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// headers are then filled into each request. For details on the custom headers see:
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// https://github.com/kubernetes/enhancements/tree/master/keps/sig-cli/859-kubectl-headers
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// Each call overwrites the previously parsed command headers (not additive).
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// TODO(seans3): Parse/add flags removing PII from flag values.
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func (c *CommandHeaderRoundTripper) ParseCommandHeaders(cmd *cobra.Command, args []string) {
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if cmd == nil {
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return
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}
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// Overwrites previously parsed command headers (headers not additive).
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c.Headers = map[string]string{}
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// Session identifier to aggregate multiple Requests from single kubectl command.
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uid := uuid.New().String()
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c.Headers[kubectlSessionHeader] = uid
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// Iterate up the hierarchy of commands from the leaf command to create
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// the full command string. Example: kubectl create secret generic
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cmdStrs := []string{}
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for cmd.HasParent() {
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parent := cmd.Parent()
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currName := strings.TrimSpace(cmd.Name())
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cmdStrs = append([]string{currName}, cmdStrs...)
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cmd = parent
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}
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currName := strings.TrimSpace(cmd.Name())
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cmdStrs = append([]string{currName}, cmdStrs...)
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if len(cmdStrs) > 0 {
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c.Headers[kubectlCommandHeader] = strings.Join(cmdStrs, " ")
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}
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}
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