Files
moby/client
Sebastiaan van Stijn 20d65620f9 client: Client.buildRequest: don't set content-header if not set
This function was setting `text/plain` as default content-type for any
request that had a non-nil body.

However, this would also set the content-type if (e.g.) `http.NoBody` was set,
or if an empty reader was used, which would result in the daemon potentialy
rejecting the request, as it validates request to be using `application/json`;
d9ee22d1ab/daemon/server/httputils/httputils.go (L47-L58)

    === RUN   TestCommitInheritsEnv
        commit_test.go:30: assertion failed: error is not nil: Error response from daemon: unsupported Content-Type header (text/plain): must be 'application/json'
    --- FAIL: TestCommitInheritsEnv (0.02s)

This patch removes setting the default content-type.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2025-11-15 00:39:59 +01:00
..
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Go client for the Docker Engine API

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The docker command uses this package to communicate with the daemon. It can also be used by your own Go applications to do anything the command-line interface does; running containers, pulling or pushing images, etc.

For example, to list all containers (the equivalent of docker ps --all):

package main

import (
	"context"
	"fmt"

	"github.com/moby/moby/client"
)

func main() {
	// Create a new client that handles common environment variables
	// for configuration (DOCKER_HOST, DOCKER_API_VERSION), and does
	// API-version negotiation to allow downgrading the API version
	// when connecting with an older daemon version.
	apiClient, err := client.New(client.FromEnv, client.WithAPIVersionNegotiation())
	if err != nil {
		panic(err)
	}
	defer apiClient.Close()

	// List all containers (both stopped and running).
	result, err := apiClient.ContainerList(context.Background(), client.ContainerListOptions{
		All: true,
	})
	if err != nil {
		panic(err)
	}

	// Print each container's ID, status and the image it was created from.
	fmt.Printf("%s  %-22s  %s\n", "ID", "STATUS", "IMAGE")
	for _, ctr := range result.Items {
		fmt.Printf("%s  %-22s  %s\n", ctr.ID, ctr.Status, ctr.Image)
	}
}

Full documentation is available on pkg.go.dev.