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vendor cleanup: remove unused,non-go and test files
This commit is contained in:
Madhu Rajanna
195
vendor/k8s.io/client-go/tools/remotecommand/v2.go
generated
vendored
195
vendor/k8s.io/client-go/tools/remotecommand/v2.go
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vendored
@ -1,195 +0,0 @@
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/*
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Copyright 2015 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 remotecommand
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import (
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"sync"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/runtime"
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)
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// streamProtocolV2 implements version 2 of the streaming protocol for attach
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// and exec. The original streaming protocol was metav1. As a result, this
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// version is referred to as version 2, even though it is the first actual
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// numbered version.
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type streamProtocolV2 struct {
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StreamOptions
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errorStream io.Reader
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remoteStdin io.ReadWriteCloser
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remoteStdout io.Reader
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remoteStderr io.Reader
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}
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var _ streamProtocolHandler = &streamProtocolV2{}
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func newStreamProtocolV2(options StreamOptions) streamProtocolHandler {
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return &streamProtocolV2{
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StreamOptions: options,
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}
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}
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func (p *streamProtocolV2) createStreams(conn streamCreator) error {
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var err error
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headers := http.Header{}
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// set up error stream
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headers.Set(v1.StreamType, v1.StreamTypeError)
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p.errorStream, err = conn.CreateStream(headers)
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if err != nil {
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return err
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}
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// set up stdin stream
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if p.Stdin != nil {
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headers.Set(v1.StreamType, v1.StreamTypeStdin)
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p.remoteStdin, err = conn.CreateStream(headers)
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if err != nil {
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return err
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}
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}
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// set up stdout stream
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if p.Stdout != nil {
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headers.Set(v1.StreamType, v1.StreamTypeStdout)
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p.remoteStdout, err = conn.CreateStream(headers)
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if err != nil {
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return err
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}
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}
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// set up stderr stream
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if p.Stderr != nil && !p.Tty {
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headers.Set(v1.StreamType, v1.StreamTypeStderr)
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p.remoteStderr, err = conn.CreateStream(headers)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (p *streamProtocolV2) copyStdin() {
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if p.Stdin != nil {
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var once sync.Once
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// copy from client's stdin to container's stdin
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go func() {
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defer runtime.HandleCrash()
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// if p.stdin is noninteractive, p.g. `echo abc | kubectl exec -i <pod> -- cat`, make sure
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// we close remoteStdin as soon as the copy from p.stdin to remoteStdin finishes. Otherwise
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// the executed command will remain running.
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defer once.Do(func() { p.remoteStdin.Close() })
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if _, err := io.Copy(p.remoteStdin, p.Stdin); err != nil {
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runtime.HandleError(err)
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}
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}()
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// read from remoteStdin until the stream is closed. this is essential to
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// be able to exit interactive sessions cleanly and not leak goroutines or
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// hang the client's terminal.
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//
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// TODO we aren't using go-dockerclient any more; revisit this to determine if it's still
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// required by engine-api.
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//
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// go-dockerclient's current hijack implementation
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// (https://github.com/fsouza/go-dockerclient/blob/89f3d56d93788dfe85f864a44f85d9738fca0670/client.go#L564)
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// waits for all three streams (stdin/stdout/stderr) to finish copying
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// before returning. When hijack finishes copying stdout/stderr, it calls
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// Close() on its side of remoteStdin, which allows this copy to complete.
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// When that happens, we must Close() on our side of remoteStdin, to
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// allow the copy in hijack to complete, and hijack to return.
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go func() {
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defer runtime.HandleCrash()
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defer once.Do(func() { p.remoteStdin.Close() })
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// this "copy" doesn't actually read anything - it's just here to wait for
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// the server to close remoteStdin.
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if _, err := io.Copy(ioutil.Discard, p.remoteStdin); err != nil {
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runtime.HandleError(err)
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}
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}()
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}
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}
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func (p *streamProtocolV2) copyStdout(wg *sync.WaitGroup) {
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if p.Stdout == nil {
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return
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}
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wg.Add(1)
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go func() {
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defer runtime.HandleCrash()
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defer wg.Done()
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if _, err := io.Copy(p.Stdout, p.remoteStdout); err != nil {
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runtime.HandleError(err)
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}
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}()
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}
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func (p *streamProtocolV2) copyStderr(wg *sync.WaitGroup) {
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if p.Stderr == nil || p.Tty {
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return
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}
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wg.Add(1)
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go func() {
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defer runtime.HandleCrash()
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defer wg.Done()
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if _, err := io.Copy(p.Stderr, p.remoteStderr); err != nil {
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runtime.HandleError(err)
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}
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}()
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}
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func (p *streamProtocolV2) stream(conn streamCreator) error {
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if err := p.createStreams(conn); err != nil {
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return err
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}
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// now that all the streams have been created, proceed with reading & copying
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errorChan := watchErrorStream(p.errorStream, &errorDecoderV2{})
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p.copyStdin()
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var wg sync.WaitGroup
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p.copyStdout(&wg)
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p.copyStderr(&wg)
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// we're waiting for stdout/stderr to finish copying
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wg.Wait()
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// waits for errorStream to finish reading with an error or nil
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return <-errorChan
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}
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// errorDecoderV2 interprets the error channel data as plain text.
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type errorDecoderV2 struct{}
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func (d *errorDecoderV2) decode(message []byte) error {
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return fmt.Errorf("error executing remote command: %s", message)
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}
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