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package remotecontext // import "github.com/docker/docker/builder/remotecontext"
import (
"bytes"
"io"
"net/http"
"net/http/httptest"
"net/url"
"testing"
"github.com/docker/docker/builder"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
"gotest.tools/v3/fs"
)
var binaryContext = []byte{0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00} // xz magic
func TestSelectAcceptableMIME(t *testing.T) {
validMimeStrings := []string{
"application/x-bzip2",
"application/bzip2",
"application/gzip",
"application/x-gzip",
"application/x-xz",
"application/xz",
"application/tar",
"application/x-tar",
"application/octet-stream",
"text/plain",
}
invalidMimeStrings := []string{
"",
"application/octet",
"application/json",
}
for _, m := range invalidMimeStrings {
if len(selectAcceptableMIME(m)) > 0 {
t.Fatalf("Should not have accepted %q", m)
}
}
for _, m := range validMimeStrings {
if str := selectAcceptableMIME(m); str == "" {
t.Fatalf("Should have accepted %q", m)
}
}
}
func TestInspectEmptyResponse(t *testing.T) {
ct := "application/octet-stream"
br := io.NopCloser(bytes.NewReader([]byte("")))
contentType, bReader, err := inspectResponse(ct, br, 0)
if err == nil {
t.Fatal("Should have generated an error for an empty response")
}
if contentType != "application/octet-stream" {
t.Fatalf("Content type should be 'application/octet-stream' but is %q", contentType)
}
body, err := io.ReadAll(bReader)
if err != nil {
t.Fatal(err)
}
if len(body) != 0 {
t.Fatal("response body should remain empty")
}
}
func TestInspectResponseBinary(t *testing.T) {
ct := "application/octet-stream"
br := io.NopCloser(bytes.NewReader(binaryContext))
contentType, bReader, err := inspectResponse(ct, br, int64(len(binaryContext)))
if err != nil {
t.Fatal(err)
}
if contentType != "application/octet-stream" {
t.Fatalf("Content type should be 'application/octet-stream' but is %q", contentType)
}
body, err := io.ReadAll(bReader)
if err != nil {
t.Fatal(err)
}
if len(body) != len(binaryContext) {
t.Fatalf("Wrong response size %d, should be == len(binaryContext)", len(body))
}
for i := range body {
if body[i] != binaryContext[i] {
t.Fatalf("Corrupted response body at byte index %d", i)
}
}
}
func TestResponseUnsupportedContentType(t *testing.T) {
content := []byte(dockerfileContents)
ct := "application/json"
br := io.NopCloser(bytes.NewReader(content))
contentType, bReader, err := inspectResponse(ct, br, int64(len(dockerfileContents)))
if err == nil {
t.Fatal("Should have returned an error on content-type 'application/json'")
}
if contentType != ct {
t.Fatalf("Should not have altered content-type: orig: %s, altered: %s", ct, contentType)
}
body, err := io.ReadAll(bReader)
if err != nil {
t.Fatal(err)
}
if string(body) != dockerfileContents {
t.Fatalf("Corrupted response body %s", body)
}
}
func TestInspectResponseTextSimple(t *testing.T) {
content := []byte(dockerfileContents)
ct := "text/plain"
br := io.NopCloser(bytes.NewReader(content))
contentType, bReader, err := inspectResponse(ct, br, int64(len(content)))
if err != nil {
t.Fatal(err)
}
if contentType != "text/plain" {
t.Fatalf("Content type should be 'text/plain' but is %q", contentType)
}
body, err := io.ReadAll(bReader)
if err != nil {
t.Fatal(err)
}
if string(body) != dockerfileContents {
t.Fatalf("Corrupted response body %s", body)
}
}
func TestInspectResponseEmptyContentType(t *testing.T) {
content := []byte(dockerfileContents)
br := io.NopCloser(bytes.NewReader(content))
contentType, bodyReader, err := inspectResponse("", br, int64(len(content)))
if err != nil {
t.Fatal(err)
}
if contentType != "text/plain" {
t.Fatalf("Content type should be 'text/plain' but is %q", contentType)
}
body, err := io.ReadAll(bodyReader)
if err != nil {
t.Fatal(err)
}
if string(body) != dockerfileContents {
t.Fatalf("Corrupted response body %s", body)
}
}
func TestUnknownContentLength(t *testing.T) {
content := []byte(dockerfileContents)
ct := "text/plain"
br := io.NopCloser(bytes.NewReader(content))
contentType, bReader, err := inspectResponse(ct, br, -1)
if err != nil {
t.Fatal(err)
}
if contentType != "text/plain" {
t.Fatalf("Content type should be 'text/plain' but is %q", contentType)
}
body, err := io.ReadAll(bReader)
if err != nil {
t.Fatal(err)
}
if string(body) != dockerfileContents {
t.Fatalf("Corrupted response body %s", body)
}
}
func TestDownloadRemote(t *testing.T) {
contextDir := fs.NewDir(t, "test-builder-download-remote",
fs.WithFile(builder.DefaultDockerfileName, dockerfileContents))
defer contextDir.Remove()
mux := http.NewServeMux()
server := httptest.NewServer(mux)
serverURL, _ := url.Parse(server.URL)
serverURL.Path = "/" + builder.DefaultDockerfileName
remoteURL := serverURL.String()
mux.Handle("/", http.FileServer(http.Dir(contextDir.Path())))
contentType, content, err := downloadRemote(remoteURL)
assert.NilError(t, err)
assert.Check(t, is.Equal(mimeTypes.TextPlain, contentType))
raw, err := io.ReadAll(content)
assert.NilError(t, err)
assert.Check(t, is.Equal(dockerfileContents, string(raw)))
}
func TestGetWithStatusError(t *testing.T) {
var testcases = []struct {
err error
statusCode int
expectedErr string
expectedBody string
}{
{
statusCode: 200,
expectedBody: "THE BODY",
},
{
statusCode: 400,
expectedErr: "with status 400 Bad Request: broke",
expectedBody: "broke",
},
}
for _, testcase := range testcases {
ts := httptest.NewServer(
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
buffer := bytes.NewBufferString(testcase.expectedBody)
w.WriteHeader(testcase.statusCode)
w.Write(buffer.Bytes())
}),
)
defer ts.Close()
response, err := GetWithStatusError(ts.URL)
if testcase.expectedErr == "" {
assert.NilError(t, err)
body, err := readBody(response.Body)
assert.NilError(t, err)
assert.Check(t, is.Contains(string(body), testcase.expectedBody))
} else {
assert.Check(t, is.ErrorContains(err, testcase.expectedErr))
}
}
}
func readBody(b io.ReadCloser) ([]byte, error) {
defer b.Close()
return io.ReadAll(b)
}
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