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package docker
import (
"bytes"
"context"
"io"
"net/http"
"net/http/httptest"
"net/url"
"os"
"regexp"
"strings"
"testing"
"github.com/containers/image/v5/internal/private"
"github.com/containers/image/v5/types"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var _ private.ImageSource = (*dockerImageSource)(nil)
func TestDockerImageSourceReference(t *testing.T) {
manifestPathRegex := regexp.MustCompile("^/v2/.*/manifests/latest$")
server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
switch {
case r.Method == http.MethodGet && r.URL.Path == "/v2/":
rw.WriteHeader(http.StatusOK)
case r.Method == http.MethodGet && manifestPathRegex.MatchString(r.URL.Path):
rw.WriteHeader(http.StatusOK)
// Empty body is good enough for this test
default:
require.FailNowf(t, "Unexpected request", "%v %v", r.Method, r.URL.Path)
}
}))
defer server.Close()
registryURL, err := url.Parse(server.URL)
require.NoError(t, err)
registry := registryURL.Host
mirrorConfiguration := strings.ReplaceAll(
`[[registry]]
prefix = "primary-override.example.com"
location = "@REGISTRY@/primary-override"
[[registry]]
location = "with-mirror.example.com"
[[registry.mirror]]
location = "@REGISTRY@/with-mirror"
`, "@REGISTRY@", registry)
registriesConf, err := os.CreateTemp("", "docker-image-src")
require.NoError(t, err)
defer registriesConf.Close()
defer os.Remove(registriesConf.Name())
err = os.WriteFile(registriesConf.Name(), []byte(mirrorConfiguration), 0600)
require.NoError(t, err)
for _, c := range []struct{ input, physical string }{
{registry + "/no-redirection/busybox:latest", registry + "/no-redirection/busybox:latest"},
{"primary-override.example.com/busybox:latest", registry + "/primary-override/busybox:latest"},
{"with-mirror.example.com/busybox:latest", registry + "/with-mirror/busybox:latest"},
} {
ref, err := ParseReference("//" + c.input)
require.NoError(t, err, c.input)
src, err := ref.NewImageSource(context.Background(), &types.SystemContext{
RegistriesDirPath: "/this/does/not/exist",
DockerPerHostCertDirPath: "/this/does/not/exist",
SystemRegistriesConfPath: registriesConf.Name(),
DockerInsecureSkipTLSVerify: types.OptionalBoolTrue,
})
require.NoError(t, err, c.input)
defer src.Close()
// The observable behavior
assert.Equal(t, "//"+c.input, src.Reference().StringWithinTransport(), c.input)
assert.Equal(t, ref.StringWithinTransport(), src.Reference().StringWithinTransport(), c.input)
// Also peek into internal state
src2, ok := src.(*dockerImageSource)
require.True(t, ok, c.input)
assert.Equal(t, "//"+c.input, src2.logicalRef.StringWithinTransport(), c.input)
assert.Equal(t, "//"+c.physical, src2.physicalRef.StringWithinTransport(), c.input)
}
}
func TestSimplifyContentType(t *testing.T) {
for _, c := range []struct{ input, expected string }{
{"", ""},
{"application/json", "application/json"},
{"application/json;charset=utf-8", "application/json"},
{"application/json; charset=utf-8", "application/json"},
{"application/json ; charset=utf-8", "application/json"},
{"application/json\t;\tcharset=utf-8", "application/json"},
{"application/json ;charset=utf-8", "application/json"},
{`application/json; charset="utf-8"`, "application/json"},
{"completely invalid", ""},
} {
out := simplifyContentType(c.input)
assert.Equal(t, c.expected, out, c.input)
}
}
func readNextStream(streams chan io.ReadCloser, errs chan error) ([]byte, error) {
select {
case r := <-streams:
if r == nil {
return nil, nil
}
defer r.Close()
return io.ReadAll(r)
case err := <-errs:
return nil, err
}
}
type verifyGetBlobAtData struct {
expectedData []byte
expectedError error
}
func verifyGetBlobAtOutput(t *testing.T, streams chan io.ReadCloser, errs chan error, expected []verifyGetBlobAtData) {
for _, c := range expected {
data, err := readNextStream(streams, errs)
assert.Equal(t, c.expectedData, data)
assert.Equal(t, c.expectedError, err)
}
}
func TestSplitHTTP200ResponseToPartial(t *testing.T) {
body := io.NopCloser(bytes.NewReader([]byte("123456789")))
defer body.Close()
streams := make(chan io.ReadCloser)
errs := make(chan error)
chunks := []private.ImageSourceChunk{
{Offset: 1, Length: 2},
{Offset: 4, Length: 1},
}
go splitHTTP200ResponseToPartial(streams, errs, body, chunks)
expected := []verifyGetBlobAtData{
{[]byte("23"), nil},
{[]byte("5"), nil},
{[]byte(nil), nil},
}
verifyGetBlobAtOutput(t, streams, errs, expected)
}
func TestHandle206Response(t *testing.T) {
body := io.NopCloser(bytes.NewReader([]byte("--AAA\r\n\r\n23\r\n--AAA\r\n\r\n5\r\n--AAA--")))
defer body.Close()
streams := make(chan io.ReadCloser)
errs := make(chan error)
chunks := []private.ImageSourceChunk{
{Offset: 1, Length: 2},
{Offset: 4, Length: 1},
}
mediaType := "multipart/form-data"
params := map[string]string{
"boundary": "AAA",
}
go handle206Response(streams, errs, body, chunks, mediaType, params)
expected := []verifyGetBlobAtData{
{[]byte("23"), nil},
{[]byte("5"), nil},
{[]byte(nil), nil},
}
verifyGetBlobAtOutput(t, streams, errs, expected)
body = io.NopCloser(bytes.NewReader([]byte("HELLO")))
defer body.Close()
streams = make(chan io.ReadCloser)
errs = make(chan error)
chunks = []private.ImageSourceChunk{{Offset: 100, Length: 5}}
mediaType = "text/plain"
params = map[string]string{}
go handle206Response(streams, errs, body, chunks, mediaType, params)
expected = []verifyGetBlobAtData{
{[]byte("HELLO"), nil},
{[]byte(nil), nil},
}
verifyGetBlobAtOutput(t, streams, errs, expected)
}
func TestParseMediaType(t *testing.T) {
mediaType, params, err := parseMediaType("multipart/byteranges; boundary=CloudFront:3F750DE0752BEDE3882F7DBE80010D31")
require.NoError(t, err)
assert.Equal(t, mediaType, "multipart/byteranges")
assert.Equal(t, params["boundary"], "CloudFront:3F750DE0752BEDE3882F7DBE80010D31")
mediaType, params, err = parseMediaType("multipart/byteranges; boundary=00000000000061573284")
require.NoError(t, err)
assert.Equal(t, mediaType, "multipart/byteranges")
assert.Equal(t, params["boundary"], "00000000000061573284")
mediaType, params, err = parseMediaType("multipart/byteranges; foo=bar; bar=baz")
require.NoError(t, err)
assert.Equal(t, mediaType, "multipart/byteranges")
assert.Equal(t, params["foo"], "bar")
assert.Equal(t, params["bar"], "baz")
// quoted symbols '@'
_, params, err = parseMediaType("multipart/byteranges; boundary=\"@:\"")
require.NoError(t, err)
assert.Equal(t, params["boundary"], "@:")
// unquoted '@'
_, _, err = parseMediaType("multipart/byteranges; boundary=@")
require.Error(t, err)
}
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