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Merge pull request #548 from duglin/MoveErrors 

Move ErrorCode logic to new errcode package
master
Stephen Day 2015-06-15 14:33:28 -07:00
parent fc09e50eb4 441f7cac87
commit e57e731821
20 changed files with 768 additions and 665 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
cmd/registry-api-descriptor-template/main.go
View File

@ -20,6 +20,7 @@ import (
"regexp"
"text/template"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
)
@ -44,7 +45,15 @@ func main() {
tmpl := template.Must(template.New(filename).Funcs(funcMap).ParseFiles(path))
if err := tmpl.Execute(os.Stdout, v2.APIDescriptor); err != nil {
data := struct {
RouteDescriptors []v2.RouteDescriptor
ErrorDescriptors []errcode.ErrorDescriptor
}{
RouteDescriptors: v2.APIDescriptor.RouteDescriptors,
ErrorDescriptors: errcode.GetErrorCodeGroup("registry.api.v2"),
}
if err := tmpl.Execute(os.Stdout, data); err != nil {
log.Fatalln(err)
}
}

24
docs/spec/api.md
View File

@ -818,20 +818,20 @@ The error codes encountered via the API are enumerated in the following table:
|Code|Message|Description|
-------|----|------|------------
`UNKNOWN` | unknown error | Generic error returned when the error does not have an API classification.
`UNSUPPORTED` | The operation is unsupported. | The operation was unsupported due to a missing implementation or invalid set of parameters.
`UNAUTHORIZED` | access to the requested resource is not authorized | The access controller denied access for the operation on a resource. Often this will be accompanied by a 401 Unauthorized response status.
`DIGEST_INVALID` | provided digest did not match uploaded content | When a blob is uploaded, the registry will check that the content matches the digest provided by the client. The error may include a detail structure with the key "digest", including the invalid digest string. This error may also be returned when a manifest includes an invalid layer digest.
`SIZE_INVALID` | provided length did not match content length | When a layer is uploaded, the provided size will be checked against the uploaded content. If they do not match, this error will be returned.
`NAME_INVALID` | invalid repository name | Invalid repository name encountered either during manifest validation or any API operation.
`TAG_INVALID` | manifest tag did not match URI | During a manifest upload, if the tag in the manifest does not match the uri tag, this error will be returned.
`NAME_UNKNOWN` | repository name not known to registry | This is returned if the name used during an operation is unknown to the registry.
`MANIFEST_UNKNOWN` | manifest unknown | This error is returned when the manifest, identified by name and tag is unknown to the repository.
`MANIFEST_INVALID` | manifest invalid | During upload, manifests undergo several checks ensuring validity. If those checks fail, this error may be returned, unless a more specific error is included. The detail will contain information the failed validation.
`MANIFEST_UNVERIFIED` | manifest failed signature verification | During manifest upload, if the manifest fails signature verification, this error will be returned.
`BLOB_UNKNOWN` | blob unknown to registry | This error may be returned when a blob is unknown to the registry in a specified repository. This can be returned with a standard get or if a manifest references an unknown layer during upload.
`BLOB_UPLOAD_UNKNOWN` | blob upload unknown to registry | If a blob upload has been cancelled or was never started, this error code may be returned.
`BLOB_UPLOAD_INVALID` | blob upload invalid | The blob upload encountered an error and can no longer proceed.
`BLOB_UPLOAD_UNKNOWN` | blob upload unknown to registry | If a blob upload has been cancelled or was never started, this error code may be returned.
`DIGEST_INVALID` | provided digest did not match uploaded content | When a blob is uploaded, the registry will check that the content matches the digest provided by the client. The error may include a detail structure with the key "digest", including the invalid digest string. This error may also be returned when a manifest includes an invalid layer digest.
`MANIFEST_BLOB_UNKNOWN` | blob unknown to registry | This error may be returned when a manifest blob is unknown to the registry.
`MANIFEST_INVALID` | manifest invalid | During upload, manifests undergo several checks ensuring validity. If those checks fail, this error may be returned, unless a more specific error is included. The detail will contain information the failed validation.
`MANIFEST_UNKNOWN` | manifest unknown | This error is returned when the manifest, identified by name and tag is unknown to the repository.
`MANIFEST_UNVERIFIED` | manifest failed signature verification | During manifest upload, if the manifest fails signature verification, this error will be returned.
`NAME_INVALID` | invalid repository name | Invalid repository name encountered either during manifest validation or any API operation.
`NAME_UNKNOWN` | repository name not known to registry | This is returned if the name used during an operation is unknown to the registry.
`SIZE_INVALID` | provided length did not match content length | When a layer is uploaded, the provided size will be checked against the uploaded content. If they do not match, this error will be returned.
`TAG_INVALID` | manifest tag did not match URI | During a manifest upload, if the tag in the manifest does not match the uri tag, this error will be returned.
`UNAUTHORIZED` | access to the requested resource is not authorized | The access controller denied access for the operation on a resource. Often this will be accompanied by a 401 Unauthorized response status.
`UNSUPPORTED` | The operation is unsupported. | The operation was unsupported due to a missing implementation or invalid set of parameters.

225
registry/api/errcode/errors.go Normal file
View File

@ -0,0 +1,225 @@
package errcode
import (
"encoding/json"
"fmt"
"strings"
)
// ErrorCoder is the base interface for ErrorCode and Error allowing
// users of each to just call ErrorCode to get the real ID of each
type ErrorCoder interface {
ErrorCode() ErrorCode
}
// ErrorCode represents the error type. The errors are serialized via strings
// and the integer format may change and should *never* be exported.
type ErrorCode int
// ErrorCode just returns itself
func (ec ErrorCode) ErrorCode() ErrorCode {
return ec
}
// Error returns the ID/Value
func (ec ErrorCode) Error() string {
return ec.Descriptor().Value
}
// Descriptor returns the descriptor for the error code.
func (ec ErrorCode) Descriptor() ErrorDescriptor {
d, ok := errorCodeToDescriptors[ec]
if !ok {
return ErrorCodeUnknown.Descriptor()
}
return d
}
// String returns the canonical identifier for this error code.
func (ec ErrorCode) String() string {
return ec.Descriptor().Value
}
// Message returned the human-readable error message for this error code.
func (ec ErrorCode) Message() string {
return ec.Descriptor().Message
}
// MarshalText encodes the receiver into UTF-8-encoded text and returns the
// result.
func (ec ErrorCode) MarshalText() (text []byte, err error) {
return []byte(ec.String()), nil
}
// UnmarshalText decodes the form generated by MarshalText.
func (ec *ErrorCode) UnmarshalText(text []byte) error {
desc, ok := idToDescriptors[string(text)]
if !ok {
desc = ErrorCodeUnknown.Descriptor()
}
*ec = desc.Code
return nil
}
// WithDetail creates a new Error struct based on the passed-in info and
// set the Detail property appropriately
func (ec ErrorCode) WithDetail(detail interface{}) Error {
if err, ok := detail.(error); ok {
detail = err.Error()
}
return Error{
Code: ec,
Detail: detail,
}
}
// Error provides a wrapper around ErrorCode with extra Details provided.
type Error struct {
Code ErrorCode `json:"code"`
Detail interface{} `json:"detail,omitempty"`
}
// ErrorCode returns the ID/Value of this Error
func (e Error) ErrorCode() ErrorCode {
return e.Code
}
// Error returns a human readable representation of the error.
func (e Error) Error() string {
return fmt.Sprintf("%s: %s",
strings.ToLower(strings.Replace(e.Code.String(), "_", " ", -1)),
e.Code.Message())
}
// Message returned the human-readable error message for this Error
func (e Error) Message() string {
return e.Code.Message()
}
// ErrorDescriptor provides relevant information about a given error code.
type ErrorDescriptor struct {
// Code is the error code that this descriptor describes.
Code ErrorCode
// Value provides a unique, string key, often captilized with
// underscores, to identify the error code. This value is used as the
// keyed value when serializing api errors.
Value string
// Message is a short, human readable decription of the error condition
// included in API responses.
Message string
// Description provides a complete account of the errors purpose, suitable
// for use in documentation.
Description string
// HTTPStatusCode provides the http status code that is associated with
// this error condition.
HTTPStatusCode int
}
// ParseErrorCode returns the value by the string error code.
// `ErrorCodeUnknown` will be returned if the error is not known.
func ParseErrorCode(value string) ErrorCode {
ed, ok := idToDescriptors[value]
if ok {
return ed.Code
}
return ErrorCodeUnknown
}
// Errors provides the envelope for multiple errors and a few sugar methods
// for use within the application.
type Errors []error
func (errs Errors) Error() string {
switch len(errs) {
case 0:
return "<nil>"
case 1:
return errs[0].Error()
default:
msg := "errors:\n"
for _, err := range errs {
msg += err.Error() + "\n"
}
return msg
}
}
// Len returns the current number of errors.
func (errs Errors) Len() int {
return len(errs)
}
// jsonError extends Error with 'Message' so that we can include the
// error text, just in case the receiver of the JSON doesn't have this
// particular ErrorCode registered
type jsonError struct {
Code ErrorCode `json:"code"`
Message string `json:"message"`
Detail interface{} `json:"detail,omitempty"`
}
// MarshalJSON converts slice of error, ErrorCode or Error into a
// slice of Error - then serializes
func (errs Errors) MarshalJSON() ([]byte, error) {
var tmpErrs []jsonError
for _, daErr := range errs {
var err Error
switch daErr.(type) {
case ErrorCode:
err = daErr.(ErrorCode).WithDetail(nil)
case Error:
err = daErr.(Error)
default:
err = ErrorCodeUnknown.WithDetail(daErr)
}
tmpErrs = append(tmpErrs, jsonError{
Code: err.Code,
Message: err.Message(),
Detail: err.Detail,
})
}
return json.Marshal(tmpErrs)
}
// UnmarshalJSON deserializes []Error and then converts it into slice of
// Error or ErrorCode
func (errs *Errors) UnmarshalJSON(data []byte) error {
var tmpErrs []jsonError
if err := json.Unmarshal(data, &tmpErrs); err != nil {
return err
}
var newErrs Errors
for _, daErr := range tmpErrs {
if daErr.Detail == nil {
// Error's w/o details get converted to ErrorCode
newErrs = append(newErrs, daErr.Code)
} else {
// Error's w/ details are untouched
newErrs = append(newErrs, Error{
Code: daErr.Code,
Detail: daErr.Detail,
})
}
}
*errs = newErrs
return nil
}

131
registry/api/errcode/errors_test.go Normal file
View File

@ -0,0 +1,131 @@
package errcode
import (
"encoding/json"
"net/http"
"reflect"
"testing"
)
// TestErrorCodes ensures that error code format, mappings and
// marshaling/unmarshaling. round trips are stable.
func TestErrorCodes(t *testing.T) {
if len(errorCodeToDescriptors) == 0 {
t.Fatal("errors aren't loaded!")
}
for ec, desc := range errorCodeToDescriptors {
if ec != desc.Code {
t.Fatalf("error code in descriptor isn't correct, %q != %q", ec, desc.Code)
}
if idToDescriptors[desc.Value].Code != ec {
t.Fatalf("error code in idToDesc isn't correct, %q != %q", idToDescriptors[desc.Value].Code, ec)
}
if ec.Message() != desc.Message {
t.Fatalf("ec.Message doesn't mtach desc.Message: %q != %q", ec.Message(), desc.Message)
}
// Test (de)serializing the ErrorCode
p, err := json.Marshal(ec)
if err != nil {
t.Fatalf("couldn't marshal ec %v: %v", ec, err)
}
if len(p) <= 0 {
t.Fatalf("expected content in marshaled before for error code %v", ec)
}
// First, unmarshal to interface and ensure we have a string.
var ecUnspecified interface{}
if err := json.Unmarshal(p, &ecUnspecified); err != nil {
t.Fatalf("error unmarshaling error code %v: %v", ec, err)
}
if _, ok := ecUnspecified.(string); !ok {
t.Fatalf("expected a string for error code %v on unmarshal got a %T", ec, ecUnspecified)
}
// Now, unmarshal with the error code type and ensure they are equal
var ecUnmarshaled ErrorCode
if err := json.Unmarshal(p, &ecUnmarshaled); err != nil {
t.Fatalf("error unmarshaling error code %v: %v", ec, err)
}
if ecUnmarshaled != ec {
t.Fatalf("unexpected error code during error code marshal/unmarshal: %v != %v", ecUnmarshaled, ec)
}
}
}
// TestErrorsManagement does a quick check of the Errors type to ensure that
// members are properly pushed and marshaled.
var ErrorCodeTest1 = Register("v2.errors", ErrorDescriptor{
Value: "TEST1",
Message: "test error 1",
Description: `Just a test message #1.`,
HTTPStatusCode: http.StatusInternalServerError,
})
var ErrorCodeTest2 = Register("v2.errors", ErrorDescriptor{
Value: "TEST2",
Message: "test error 2",
Description: `Just a test message #2.`,
HTTPStatusCode: http.StatusNotFound,
})
func TestErrorsManagement(t *testing.T) {
var errs Errors
errs = append(errs, ErrorCodeTest1)
errs = append(errs, ErrorCodeTest2.WithDetail(
map[string]interface{}{"digest": "sometestblobsumdoesntmatter"}))
p, err := json.Marshal(errs)
if err != nil {
t.Fatalf("error marashaling errors: %v", err)
}
expectedJSON := "[{\"code\":\"TEST1\",\"message\":\"test error 1\"},{\"code\":\"TEST2\",\"message\":\"test error 2\",\"detail\":{\"digest\":\"sometestblobsumdoesntmatter\"}}]"
if string(p) != expectedJSON {
t.Fatalf("unexpected json:\ngot:\n%q\n\nexpected:\n%q", string(p), expectedJSON)
}
// Now test the reverse
var unmarshaled Errors
if err := json.Unmarshal(p, &unmarshaled); err != nil {
t.Fatalf("unexpected error unmarshaling error envelope: %v", err)
}
if !reflect.DeepEqual(unmarshaled, errs) {
t.Fatalf("errors not equal after round trip:\nunmarshaled:\n%#v\n\nerrs:\n%#v", unmarshaled, errs)
}
// Test again with a single value this time
errs = Errors{ErrorCodeUnknown}
expectedJSON = "[{\"code\":\"UNKNOWN\",\"message\":\"unknown error\"}]"
p, err = json.Marshal(errs)
if err != nil {
t.Fatalf("error marashaling errors: %v", err)
}
if string(p) != expectedJSON {
t.Fatalf("unexpected json: %q != %q", string(p), expectedJSON)
}
// Now test the reverse
unmarshaled = nil
if err := json.Unmarshal(p, &unmarshaled); err != nil {
t.Fatalf("unexpected error unmarshaling error envelope: %v", err)
}
if !reflect.DeepEqual(unmarshaled, errs) {
t.Fatalf("errors not equal after round trip:\nunmarshaled:\n%#v\n\nerrs:\n%#v", unmarshaled, errs)
}
}

86
registry/api/errcode/register.go Normal file
View File

@ -0,0 +1,86 @@
package errcode
import (
"fmt"
"net/http"
"sort"
"sync"
)
var (
errorCodeToDescriptors = map[ErrorCode]ErrorDescriptor{}
idToDescriptors = map[string]ErrorDescriptor{}
groupToDescriptors = map[string][]ErrorDescriptor{}
)
// ErrorCodeUnknown is a generic error that can be used as a last
// resort if there is no situation-specific error message that can be used
var ErrorCodeUnknown = Register("errcode", ErrorDescriptor{
Value: "UNKNOWN",
Message: "unknown error",
Description: `Generic error returned when the error does not have an
API classification.`,
HTTPStatusCode: http.StatusInternalServerError,
})
var nextCode = 1000
var registerLock sync.Mutex
// Register will make the passed-in error known to the environment and
// return a new ErrorCode
func Register(group string, descriptor ErrorDescriptor) ErrorCode {
registerLock.Lock()
defer registerLock.Unlock()
descriptor.Code = ErrorCode(nextCode)
if _, ok := idToDescriptors[descriptor.Value]; ok {
panic(fmt.Sprintf("ErrorValue %q is already registered", descriptor.Value))
}
if _, ok := errorCodeToDescriptors[descriptor.Code]; ok {
panic(fmt.Sprintf("ErrorCode %v is already registered", descriptor.Code))
}
groupToDescriptors[group] = append(groupToDescriptors[group], descriptor)
errorCodeToDescriptors[descriptor.Code] = descriptor
idToDescriptors[descriptor.Value] = descriptor
nextCode++
return descriptor.Code
}
type byValue []ErrorDescriptor
func (a byValue) Len() int { return len(a) }
func (a byValue) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a byValue) Less(i, j int) bool { return a[i].Value < a[j].Value }
// GetGroupNames returns the list of Error group names that are registered
func GetGroupNames() []string {
keys := []string{}
for k := range groupToDescriptors {
keys = append(keys, k)
}
sort.Strings(keys)
return keys
}
// GetErrorCodeGroup returns the named group of error descriptors
func GetErrorCodeGroup(name string) []ErrorDescriptor {
desc := groupToDescriptors[name]
sort.Sort(byValue(desc))
return desc
}
// GetErrorAllDescriptors returns a slice of all ErrorDescriptors that are
// registered, irrespective of what group they're in
func GetErrorAllDescriptors() []ErrorDescriptor {
result := []ErrorDescriptor{}
for _, group := range GetGroupNames() {
result = append(result, GetErrorCodeGroup(group)...)
}
sort.Sort(byValue(result))
return result
}

226
registry/api/v2/descriptors.go
View File

@ -5,6 +5,7 @@ import (
"regexp"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/registry/api/errcode"
)
var (
@ -98,7 +99,7 @@ var (
Format: "<length>",
},
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
Body: BodyDescriptor{
@ -119,7 +120,7 @@ var (
Format: "<length>",
},
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
Body: BodyDescriptor{
@ -171,13 +172,8 @@ const (
var APIDescriptor = struct {
// RouteDescriptors provides a list of the routes available in the API.
RouteDescriptors []RouteDescriptor
// ErrorDescriptors provides a list of the error codes and their
// associated documentation and metadata.
ErrorDescriptors []ErrorDescriptor
}{
RouteDescriptors: routeDescriptors,
ErrorDescriptors: errorDescriptors,
}
// RouteDescriptor describes a route specified by name.
@ -275,7 +271,7 @@ type ResponseDescriptor struct {
// ErrorCodes enumerates the error codes that may be returned along with
// the response.
ErrorCodes []ErrorCode
ErrorCodes []errcode.ErrorCode
// Body describes the body of the response, if any.
Body BodyDescriptor
@ -317,30 +313,6 @@ type ParameterDescriptor struct {
Examples []string
}
// ErrorDescriptor provides relevant information about a given error code.
type ErrorDescriptor struct {
// Code is the error code that this descriptor describes.
Code ErrorCode
// Value provides a unique, string key, often captilized with
// underscores, to identify the error code. This value is used as the
// keyed value when serializing api errors.
Value string
// Message is a short, human readable decription of the error condition
// included in API responses.
Message string
// Description provides a complete account of the errors purpose, suitable
// for use in documentation.
Description string
// HTTPStatusCodes provides a list of status under which this error
// condition may arise. If it is empty, the error condition may be seen
// for any status code.
HTTPStatusCodes []int
}
var routeDescriptors = []RouteDescriptor{
{
Name: RouteNameBase,
@ -374,7 +346,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
},
@ -438,7 +410,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
},
},
@ -449,7 +421,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
},
@ -495,7 +467,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "The name or reference was invalid.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeTagInvalid,
},
@ -511,14 +483,14 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
},
{
Description: "The named manifest is not known to the registry.",
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
ErrorCodeManifestUnknown,
},
@ -573,7 +545,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeTagInvalid,
ErrorCodeManifestInvalid,
@ -588,7 +560,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
},
@ -596,7 +568,7 @@ var routeDescriptors = []RouteDescriptor{
Name: "Missing Layer(s)",
Description: "One or more layers may be missing during a manifest upload. If so, the missing layers will be enumerated in the error response.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeBlobUnknown,
},
Body: BodyDescriptor{
@ -625,7 +597,7 @@ var routeDescriptors = []RouteDescriptor{
Format: "<length>",
},
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
Body: BodyDescriptor{
@ -660,7 +632,7 @@ var routeDescriptors = []RouteDescriptor{
Name: "Invalid Name or Reference",
Description: "The specified `name` or `reference` were invalid and the delete was unable to proceed.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeTagInvalid,
},
@ -680,7 +652,7 @@ var routeDescriptors = []RouteDescriptor{
Format: "<length>",
},
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
Body: BodyDescriptor{
@ -692,7 +664,7 @@ var routeDescriptors = []RouteDescriptor{
Name: "Unknown Manifest",
Description: "The specified `name` or `reference` are unknown to the registry and the delete was unable to proceed. Clients can assume the manifest was already deleted if this response is returned.",
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
ErrorCodeManifestUnknown,
},
@ -765,7 +737,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "There was a problem with the request that needs to be addressed by the client, such as an invalid `name` or `tag`.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeDigestInvalid,
},
@ -782,7 +754,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
ErrorCodeBlobUnknown,
},
@ -834,7 +806,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "There was a problem with the request that needs to be addressed by the client, such as an invalid `name` or `tag`.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeDigestInvalid,
},
@ -846,7 +818,7 @@ var routeDescriptors = []RouteDescriptor{
unauthorizedResponse,
{
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
ErrorCodeBlobUnknown,
},
@ -926,7 +898,7 @@ var routeDescriptors = []RouteDescriptor{
{
Name: "Invalid Name or Digest",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
},
@ -970,7 +942,7 @@ var routeDescriptors = []RouteDescriptor{
{
Name: "Invalid Name or Digest",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
},
@ -1024,7 +996,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "There was an error processing the upload and it must be restarted.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
ErrorCodeBlobUploadInvalid,
@ -1038,7 +1010,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "The upload is unknown to the registry. The upload must be restarted.",
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeBlobUploadUnknown,
},
Body: BodyDescriptor{
@ -1096,7 +1068,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "There was an error processing the upload and it must be restarted.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
ErrorCodeBlobUploadInvalid,
@ -1110,7 +1082,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "The upload is unknown to the registry. The upload must be restarted.",
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeBlobUploadUnknown,
},
Body: BodyDescriptor{
@ -1175,7 +1147,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "There was an error processing the upload and it must be restarted.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
ErrorCodeBlobUploadInvalid,
@ -1189,7 +1161,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "The upload is unknown to the registry. The upload must be restarted.",
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeBlobUploadUnknown,
},
Body: BodyDescriptor{
@ -1266,7 +1238,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "There was an error processing the upload and it must be restarted.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
ErrorCodeBlobUploadInvalid,
@ -1280,7 +1252,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "The upload is unknown to the registry. The upload must be restarted.",
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeBlobUploadUnknown,
},
Body: BodyDescriptor{
@ -1321,7 +1293,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "An error was encountered processing the delete. The client may ignore this error.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeBlobUploadInvalid,
},
@ -1334,7 +1306,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "The upload is unknown to the registry. The client may ignore this error and assume the upload has been deleted.",
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeBlobUploadUnknown,
},
Body: BodyDescriptor{
@ -1350,143 +1322,11 @@ var routeDescriptors = []RouteDescriptor{
},
}
// ErrorDescriptors provides a list of HTTP API Error codes that may be
// encountered when interacting with the registry API.
var errorDescriptors = []ErrorDescriptor{
{
Code: ErrorCodeUnknown,
Value: "UNKNOWN",
Message: "unknown error",
Description: `Generic error returned when the error does not have an
API classification.`,
},
{
Code: ErrorCodeUnsupported,
Value: "UNSUPPORTED",
Message: "The operation is unsupported.",
Description: `The operation was unsupported due to a missing
implementation or invalid set of parameters.`,
},
{
Code: ErrorCodeUnauthorized,
Value: "UNAUTHORIZED",
Message: "access to the requested resource is not authorized",
Description: `The access controller denied access for the operation on
a resource. Often this will be accompanied by a 401 Unauthorized
response status.`,
},
{
Code: ErrorCodeDigestInvalid,
Value: "DIGEST_INVALID",
Message: "provided digest did not match uploaded content",
Description: `When a blob is uploaded, the registry will check that
the content matches the digest provided by the client. The error may
include a detail structure with the key "digest", including the
invalid digest string. This error may also be returned when a manifest
includes an invalid layer digest.`,
HTTPStatusCodes: []int{http.StatusBadRequest, http.StatusNotFound},
},
{
Code: ErrorCodeSizeInvalid,
Value: "SIZE_INVALID",
Message: "provided length did not match content length",
Description: `When a layer is uploaded, the provided size will be
checked against the uploaded content. If they do not match, this error
will be returned.`,
HTTPStatusCodes: []int{http.StatusBadRequest},
},
{
Code: ErrorCodeNameInvalid,
Value: "NAME_INVALID",
Message: "invalid repository name",
Description: `Invalid repository name encountered either during
manifest validation or any API operation.`,
HTTPStatusCodes: []int{http.StatusBadRequest, http.StatusNotFound},
},
{
Code: ErrorCodeTagInvalid,
Value: "TAG_INVALID",
Message: "manifest tag did not match URI",
Description: `During a manifest upload, if the tag in the manifest
does not match the uri tag, this error will be returned.`,
HTTPStatusCodes: []int{http.StatusBadRequest, http.StatusNotFound},
},
{
Code: ErrorCodeNameUnknown,
Value: "NAME_UNKNOWN",
Message: "repository name not known to registry",
Description: `This is returned if the name used during an operation is
unknown to the registry.`,
HTTPStatusCodes: []int{http.StatusNotFound},
},
{
Code: ErrorCodeManifestUnknown,
Value: "MANIFEST_UNKNOWN",
Message: "manifest unknown",
Description: `This error is returned when the manifest, identified by
name and tag is unknown to the repository.`,
HTTPStatusCodes: []int{http.StatusNotFound},
},
{
Code: ErrorCodeManifestInvalid,
Value: "MANIFEST_INVALID",
Message: "manifest invalid",
Description: `During upload, manifests undergo several checks ensuring
validity. If those checks fail, this error may be returned, unless a
more specific error is included. The detail will contain information
the failed validation.`,
HTTPStatusCodes: []int{http.StatusBadRequest},
},
{
Code: ErrorCodeManifestUnverified,
Value: "MANIFEST_UNVERIFIED",
Message: "manifest failed signature verification",
Description: `During manifest upload, if the manifest fails signature
verification, this error will be returned.`,
HTTPStatusCodes: []int{http.StatusBadRequest},
},
{
Code: ErrorCodeBlobUnknown,
Value: "BLOB_UNKNOWN",
Message: "blob unknown to registry",
Description: `This error may be returned when a blob is unknown to the
registry in a specified repository. This can be returned with a
standard get or if a manifest references an unknown layer during
upload.`,
HTTPStatusCodes: []int{http.StatusBadRequest, http.StatusNotFound},
},
{
Code: ErrorCodeBlobUploadUnknown,
Value: "BLOB_UPLOAD_UNKNOWN",
Message: "blob upload unknown to registry",
Description: `If a blob upload has been cancelled or was never
started, this error code may be returned.`,
HTTPStatusCodes: []int{http.StatusNotFound},
},
{
Code: ErrorCodeBlobUploadInvalid,
Value: "BLOB_UPLOAD_INVALID",
Message: "blob upload invalid",
Description: `The blob upload encountered an error and can no
longer proceed.`,
HTTPStatusCodes: []int{http.StatusNotFound},
},
}
var errorCodeToDescriptors map[ErrorCode]ErrorDescriptor
var idToDescriptors map[string]ErrorDescriptor
var routeDescriptorsMap map[string]RouteDescriptor
func init() {
errorCodeToDescriptors = make(map[ErrorCode]ErrorDescriptor, len(errorDescriptors))
idToDescriptors = make(map[string]ErrorDescriptor, len(errorDescriptors))
routeDescriptorsMap = make(map[string]RouteDescriptor, len(routeDescriptors))
for _, descriptor := range errorDescriptors {
errorCodeToDescriptors[descriptor.Code] = descriptor
idToDescriptors[descriptor.Value] = descriptor
}
for _, descriptor := range routeDescriptors {
routeDescriptorsMap[descriptor.Name] = descriptor
}

268
registry/api/v2/errors.go
View File

@ -1,194 +1,154 @@
package v2
import (
"fmt"
"strings"
"net/http"
"github.com/docker/distribution/registry/api/errcode"
)
// ErrorCode represents the error type. The errors are serialized via strings
// and the integer format may change and should *never* be exported.
type ErrorCode int
const (
// ErrorCodeUnknown is a catch-all for errors not defined below.
ErrorCodeUnknown ErrorCode = iota
const errGroup = "registry.api.v2"
var (
// ErrorCodeUnsupported is returned when an operation is not supported.
ErrorCodeUnsupported
ErrorCodeUnsupported = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "UNSUPPORTED",
Message: "The operation is unsupported.",
Description: `The operation was unsupported due to a missing
implementation or invalid set of parameters.`,
})
// ErrorCodeUnauthorized is returned if a request is not authorized.
ErrorCodeUnauthorized
ErrorCodeUnauthorized = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "UNAUTHORIZED",
Message: "access to the requested resource is not authorized",
Description: `The access controller denied access for the operation on
a resource. Often this will be accompanied by a 401 Unauthorized
response status.`,
HTTPStatusCode: http.StatusForbidden,
})
// ErrorCodeDigestInvalid is returned when uploading a blob if the
// provided digest does not match the blob contents.
ErrorCodeDigestInvalid
ErrorCodeDigestInvalid = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "DIGEST_INVALID",
Message: "provided digest did not match uploaded content",
Description: `When a blob is uploaded, the registry will check that
the content matches the digest provided by the client. The error may
include a detail structure with the key "digest", including the
invalid digest string. This error may also be returned when a manifest
includes an invalid layer digest.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeSizeInvalid is returned when uploading a blob if the provided
// size does not match the content length.
ErrorCodeSizeInvalid
ErrorCodeSizeInvalid = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "SIZE_INVALID",
Message: "provided length did not match content length",
Description: `When a layer is uploaded, the provided size will be
checked against the uploaded content. If they do not match, this error
will be returned.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeNameInvalid is returned when the name in the manifest does not
// match the provided name.
ErrorCodeNameInvalid
ErrorCodeNameInvalid = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "NAME_INVALID",
Message: "invalid repository name",
Description: `Invalid repository name encountered either during
manifest validation or any API operation.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeTagInvalid is returned when the tag in the manifest does not
// match the provided tag.
ErrorCodeTagInvalid
ErrorCodeTagInvalid = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "TAG_INVALID",
Message: "manifest tag did not match URI",
Description: `During a manifest upload, if the tag in the manifest
does not match the uri tag, this error will be returned.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeNameUnknown when the repository name is not known.
ErrorCodeNameUnknown
ErrorCodeNameUnknown = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "NAME_UNKNOWN",
Message: "repository name not known to registry",
Description: `This is returned if the name used during an operation is
unknown to the registry.`,
HTTPStatusCode: http.StatusNotFound,
})
// ErrorCodeManifestUnknown returned when image manifest is unknown.
ErrorCodeManifestUnknown
ErrorCodeManifestUnknown = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "MANIFEST_UNKNOWN",
Message: "manifest unknown",
Description: `This error is returned when the manifest, identified by
name and tag is unknown to the repository.`,
HTTPStatusCode: http.StatusNotFound,
})
// ErrorCodeManifestInvalid returned when an image manifest is invalid,
// typically during a PUT operation. This error encompasses all errors
// encountered during manifest validation that aren't signature errors.
ErrorCodeManifestInvalid
ErrorCodeManifestInvalid = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "MANIFEST_INVALID",
Message: "manifest invalid",
Description: `During upload, manifests undergo several checks ensuring
validity. If those checks fail, this error may be returned, unless a
more specific error is included. The detail will contain information
the failed validation.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeManifestUnverified is returned when the manifest fails
// signature verfication.
ErrorCodeManifestUnverified
ErrorCodeManifestUnverified = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "MANIFEST_UNVERIFIED",
Message: "manifest failed signature verification",
Description: `During manifest upload, if the manifest fails signature
verification, this error will be returned.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeManifestBlobUnknown is returned when a manifest blob is
// unknown to the registry.
ErrorCodeManifestBlobUnknown = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "MANIFEST_BLOB_UNKNOWN",
Message: "blob unknown to registry",
Description: `This error may be returned when a manifest blob is
unknown to the registry.`,
HTTPStatusCode: http.StatusBadRequest,
})
// ErrorCodeBlobUnknown is returned when a blob is unknown to the
// registry. This can happen when the manifest references a nonexistent
// layer or the result is not found by a blob fetch.
ErrorCodeBlobUnknown
ErrorCodeBlobUnknown = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "BLOB_UNKNOWN",
Message: "blob unknown to registry",
Description: `This error may be returned when a blob is unknown to the
registry in a specified repository. This can be returned with a
standard get or if a manifest references an unknown layer during
upload.`,
HTTPStatusCode: http.StatusNotFound,
})
// ErrorCodeBlobUploadUnknown is returned when an upload is unknown.
ErrorCodeBlobUploadUnknown
ErrorCodeBlobUploadUnknown = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "BLOB_UPLOAD_UNKNOWN",
Message: "blob upload unknown to registry",
Description: `If a blob upload has been cancelled or was never
started, this error code may be returned.`,
HTTPStatusCode: http.StatusNotFound,
})
// ErrorCodeBlobUploadInvalid is returned when an upload is invalid.
ErrorCodeBlobUploadInvalid
)
// ParseErrorCode attempts to parse the error code string, returning
// ErrorCodeUnknown if the error is not known.
func ParseErrorCode(s string) ErrorCode {
desc, ok := idToDescriptors[s]
if !ok {
return ErrorCodeUnknown
}
return desc.Code
}
// Descriptor returns the descriptor for the error code.
func (ec ErrorCode) Descriptor() ErrorDescriptor {
d, ok := errorCodeToDescriptors[ec]
if !ok {
return ErrorCodeUnknown.Descriptor()
}
return d
}
// String returns the canonical identifier for this error code.
func (ec ErrorCode) String() string {
return ec.Descriptor().Value
}
// Message returned the human-readable error message for this error code.
func (ec ErrorCode) Message() string {
return ec.Descriptor().Message
}
// MarshalText encodes the receiver into UTF-8-encoded text and returns the
// result.
func (ec ErrorCode) MarshalText() (text []byte, err error) {
return []byte(ec.String()), nil
}
// UnmarshalText decodes the form generated by MarshalText.
func (ec *ErrorCode) UnmarshalText(text []byte) error {
desc, ok := idToDescriptors[string(text)]
if !ok {
desc = ErrorCodeUnknown.Descriptor()
}
*ec = desc.Code
return nil
}
// Error provides a wrapper around ErrorCode with extra Details provided.
type Error struct {
Code ErrorCode `json:"code"`
Message string `json:"message,omitempty"`
Detail interface{} `json:"detail,omitempty"`
}
// Error returns a human readable representation of the error.
func (e Error) Error() string {
return fmt.Sprintf("%s: %s",
strings.ToLower(strings.Replace(e.Code.String(), "_", " ", -1)),
e.Message)
}
// Errors provides the envelope for multiple errors and a few sugar methods
// for use within the application.
type Errors struct {
Errors []Error `json:"errors,omitempty"`
}
// Push pushes an error on to the error stack, with the optional detail
// argument. It is a programming error (ie panic) to push more than one
// detail at a time.
func (errs *Errors) Push(code ErrorCode, details ...interface{}) {
if len(details) > 1 {
panic("please specify zero or one detail items for this error")
}
var detail interface{}
if len(details) > 0 {
detail = details[0]
}
if err, ok := detail.(error); ok {
detail = err.Error()
}
errs.PushErr(Error{
Code: code,
Message: code.Message(),
Detail: detail,
ErrorCodeBlobUploadInvalid = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "BLOB_UPLOAD_INVALID",
Message: "blob upload invalid",
Description: `The blob upload encountered an error and can no
longer proceed.`,
HTTPStatusCode: http.StatusNotFound,
})
}
// PushErr pushes an error interface onto the error stack.
func (errs *Errors) PushErr(err error) {
switch err.(type) {
case Error:
errs.Errors = append(errs.Errors, err.(Error))
default:
errs.Errors = append(errs.Errors, Error{Message: err.Error()})
}
}
func (errs *Errors) Error() string {
switch errs.Len() {
case 0:
return "<nil>"
case 1:
return errs.Errors[0].Error()
default:
msg := "errors:\n"
for _, err := range errs.Errors {
msg += err.Error() + "\n"
}
return msg
}
}
// Clear clears the errors.
func (errs *Errors) Clear() {
errs.Errors = errs.Errors[:0]
}
// Len returns the current number of errors.
func (errs *Errors) Len() int {
return len(errs.Errors)
}
)

165
registry/api/v2/errors_test.go
View File

@ -1,165 +0,0 @@
package v2
import (
"encoding/json"
"reflect"
"testing"
"github.com/docker/distribution/digest"
)
// TestErrorCodes ensures that error code format, mappings and
// marshaling/unmarshaling. round trips are stable.
func TestErrorCodes(t *testing.T) {
for _, desc := range errorDescriptors {
if desc.Code.String() != desc.Value {
t.Fatalf("error code string incorrect: %q != %q", desc.Code.String(), desc.Value)
}
if desc.Code.Message() != desc.Message {
t.Fatalf("incorrect message for error code %v: %q != %q", desc.Code, desc.Code.Message(), desc.Message)
}
// Serialize the error code using the json library to ensure that we
// get a string and it works round trip.
p, err := json.Marshal(desc.Code)
if err != nil {
t.Fatalf("error marshaling error code %v: %v", desc.Code, err)
}
if len(p) <= 0 {
t.Fatalf("expected content in marshaled before for error code %v", desc.Code)
}
// First, unmarshal to interface and ensure we have a string.
var ecUnspecified interface{}
if err := json.Unmarshal(p, &ecUnspecified); err != nil {
t.Fatalf("error unmarshaling error code %v: %v", desc.Code, err)
}
if _, ok := ecUnspecified.(string); !ok {
t.Fatalf("expected a string for error code %v on unmarshal got a %T", desc.Code, ecUnspecified)
}
// Now, unmarshal with the error code type and ensure they are equal
var ecUnmarshaled ErrorCode
if err := json.Unmarshal(p, &ecUnmarshaled); err != nil {
t.Fatalf("error unmarshaling error code %v: %v", desc.Code, err)
}
if ecUnmarshaled != desc.Code {
t.Fatalf("unexpected error code during error code marshal/unmarshal: %v != %v", ecUnmarshaled, desc.Code)
}
}
}
// TestErrorsManagement does a quick check of the Errors type to ensure that
// members are properly pushed and marshaled.
func TestErrorsManagement(t *testing.T) {
var errs Errors
errs.Push(ErrorCodeDigestInvalid)
errs.Push(ErrorCodeBlobUnknown,
map[string]digest.Digest{"digest": "sometestblobsumdoesntmatter"})
p, err := json.Marshal(errs)
if err != nil {
t.Fatalf("error marashaling errors: %v", err)
}
expectedJSON := "{\"errors\":[{\"code\":\"DIGEST_INVALID\",\"message\":\"provided digest did not match uploaded content\"},{\"code\":\"BLOB_UNKNOWN\",\"message\":\"blob unknown to registry\",\"detail\":{\"digest\":\"sometestblobsumdoesntmatter\"}}]}"
if string(p) != expectedJSON {
t.Fatalf("unexpected json: %q != %q", string(p), expectedJSON)
}
errs.Clear()
errs.Push(ErrorCodeUnknown)
expectedJSON = "{\"errors\":[{\"code\":\"UNKNOWN\",\"message\":\"unknown error\"}]}"
p, err = json.Marshal(errs)
if err != nil {
t.Fatalf("error marashaling errors: %v", err)
}
if string(p) != expectedJSON {
t.Fatalf("unexpected json: %q != %q", string(p), expectedJSON)
}
}
// TestMarshalUnmarshal ensures that api errors can round trip through json
// without losing information.
func TestMarshalUnmarshal(t *testing.T) {
var errors Errors
for _, testcase := range []struct {
description string
err Error
}{
{
description: "unknown error",
err: Error{
Code: ErrorCodeUnknown,
Message: ErrorCodeUnknown.Descriptor().Message,
},
},
{
description: "unknown manifest",
err: Error{
Code: ErrorCodeManifestUnknown,
Message: ErrorCodeManifestUnknown.Descriptor().Message,
},
},
{
description: "unknown manifest",
err: Error{
Code: ErrorCodeBlobUnknown,
Message: ErrorCodeBlobUnknown.Descriptor().Message,
Detail: map[string]interface{}{"digest": "asdfqwerqwerqwerqwer"},
},
},
} {
fatalf := func(format string, args ...interface{}) {
t.Fatalf(testcase.description+": "+format, args...)
}
unexpectedErr := func(err error) {
fatalf("unexpected error: %v", err)
}
p, err := json.Marshal(testcase.err)
if err != nil {
unexpectedErr(err)
}
var unmarshaled Error
if err := json.Unmarshal(p, &unmarshaled); err != nil {
unexpectedErr(err)
}
if !reflect.DeepEqual(unmarshaled, testcase.err) {
fatalf("errors not equal after round trip: %#v != %#v", unmarshaled, testcase.err)
}
// Roll everything up into an error response envelope.
errors.PushErr(testcase.err)
}
p, err := json.Marshal(errors)
if err != nil {
t.Fatalf("unexpected error marshaling error envelope: %v", err)
}
var unmarshaled Errors
if err := json.Unmarshal(p, &unmarshaled); err != nil {
t.Fatalf("unexpected error unmarshaling error envelope: %v", err)
}
if !reflect.DeepEqual(unmarshaled, errors) {
t.Fatalf("errors not equal after round trip: %#v != %#v", unmarshaled, errors)
}
}

27
registry/client/blob_writer_test.go
View File

@ -7,6 +7,7 @@ import (
"testing"
"github.com/docker/distribution"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/docker/distribution/testutil"
)
@ -85,15 +86,12 @@ func TestUploadReadFrom(t *testing.T) {
Response: testutil.Response{
StatusCode: http.StatusBadRequest,
Body: []byte(`
{
"errors": [
[
{
"code": "BLOB_UPLOAD_INVALID",
"message": "invalid upload identifier",
"detail": "more detail"
}
]
}`),
] `),
},
},
// Test 400 invalid json
@ -161,17 +159,20 @@ func TestUploadReadFrom(t *testing.T) {
if err == nil {
t.Fatalf("Expected error when not found")
}
if uploadErr, ok := err.(*v2.Errors); !ok {
if uploadErr, ok := err.(errcode.Errors); !ok {
t.Fatalf("Wrong error type %T: %s", err, err)
} else if len(uploadErr.Errors) != 1 {
t.Fatalf("Unexpected number of errors: %d, expected 1", len(uploadErr.Errors))
} else if len(uploadErr) != 1 {
t.Fatalf("Unexpected number of errors: %d, expected 1", len(uploadErr))
} else {
v2Err := uploadErr.Errors[0]
if v2Err.Code != v2.ErrorCodeBlobUploadInvalid {
t.Fatalf("Unexpected error code: %s, expected %s", v2Err.Code.String(), v2.ErrorCodeBlobUploadInvalid.String())
v2Err, ok := uploadErr[0].(errcode.Error)
if !ok {
t.Fatalf("Not an 'Error' type: %#v", uploadErr[0])
}
if expected := "invalid upload identifier"; v2Err.Message != expected {
t.Fatalf("Unexpected error message: %s, expected %s", v2Err.Message, expected)
if v2Err.Code != v2.ErrorCodeBlobUploadInvalid {
t.Fatalf("Unexpected error code: %s, expected %d", v2Err.Code.String(), v2.ErrorCodeBlobUploadInvalid)
}
if expected := "blob upload invalid"; v2Err.Message() != expected {
t.Fatalf("Unexpected error message: %s, expected %s", v2Err.Message(), expected)
}
if expected := "more detail"; v2Err.Detail.(string) != expected {
t.Fatalf("Unexpected error message: %s, expected %s", v2Err.Detail.(string), expected)

12
registry/client/errors.go
View File

@ -7,6 +7,7 @@ import (
"io/ioutil"
"net/http"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
)
@ -32,7 +33,7 @@ func (e *UnexpectedHTTPResponseError) Error() string {
}
func parseHTTPErrorResponse(r io.Reader) error {
var errors v2.Errors
var errors errcode.Errors
body, err := ioutil.ReadAll(r)
if err != nil {
return err
@ -44,17 +45,16 @@ func parseHTTPErrorResponse(r io.Reader) error {
Response: body,
}
}
return &errors
return errors
}
func handleErrorResponse(resp *http.Response) error {
if resp.StatusCode == 401 {
err := parseHTTPErrorResponse(resp.Body)
if uErr, ok := err.(*UnexpectedHTTPResponseError); ok {
return &v2.Error{
Code: v2.ErrorCodeUnauthorized,
Message: "401 Unauthorized",
Detail: uErr.Response,
return &errcode.Error{
Code: v2.ErrorCodeUnauthorized,
Detail: uErr.Response,
}
}
return err

7
registry/client/repository_test.go
View File

@ -18,6 +18,7 @@ import (
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/docker/distribution/testutil"
)
@ -668,14 +669,14 @@ func TestManifestUnauthorized(t *testing.T) {
if err == nil {
t.Fatal("Expected error fetching manifest")
}
v2Err, ok := err.(*v2.Error)
v2Err, ok := err.(*errcode.Error)
if !ok {
t.Fatalf("Unexpected error type: %#v", err)
}
if v2Err.Code != v2.ErrorCodeUnauthorized {
t.Fatalf("Unexpected error code: %s", v2Err.Code.String())
}
if expected := "401 Unauthorized"; v2Err.Message != expected {
t.Fatalf("Unexpected message value: %s, expected %s", v2Err.Message, expected)
if expected := errcode.ErrorCode(v2.ErrorCodeUnauthorized).Message(); v2Err.Message() != expected {
t.Fatalf("Unexpected message value: %s, expected %s", v2Err.Message(), expected)
}
}

25
registry/handlers/api_test.go
View File

@ -19,6 +19,7 @@ import (
"github.com/docker/distribution/configuration"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
_ "github.com/docker/distribution/registry/storage/driver/inmemory"
"github.com/docker/distribution/testutil"
@ -373,7 +374,7 @@ func TestManifestAPI(t *testing.T) {
_, p, counts := checkBodyHasErrorCodes(t, "getting unknown manifest tags", resp,
v2.ErrorCodeManifestUnverified, v2.ErrorCodeBlobUnknown, v2.ErrorCodeDigestInvalid)
expectedCounts := map[v2.ErrorCode]int{
expectedCounts := map[errcode.ErrorCode]int{
v2.ErrorCodeManifestUnverified: 1,
v2.ErrorCodeBlobUnknown: 2,
v2.ErrorCodeDigestInvalid: 2,
@ -748,18 +749,18 @@ func checkResponse(t *testing.T, msg string, resp *http.Response, expectedStatus
// checkBodyHasErrorCodes ensures the body is an error body and has the
// expected error codes, returning the error structure, the json slice and a
// count of the errors by code.
func checkBodyHasErrorCodes(t *testing.T, msg string, resp *http.Response, errorCodes ...v2.ErrorCode) (v2.Errors, []byte, map[v2.ErrorCode]int) {
func checkBodyHasErrorCodes(t *testing.T, msg string, resp *http.Response, errorCodes ...errcode.ErrorCode) (errcode.Errors, []byte, map[errcode.ErrorCode]int) {
p, err := ioutil.ReadAll(resp.Body)
if err != nil {
t.Fatalf("unexpected error reading body %s: %v", msg, err)
}
var errs v2.Errors
var errs errcode.Errors
if err := json.Unmarshal(p, &errs); err != nil {
t.Fatalf("unexpected error decoding error response: %v", err)
}
if len(errs.Errors) == 0 {
if len(errs) == 0 {
t.Fatalf("expected errors in response")
}
@ -770,8 +771,8 @@ func checkBodyHasErrorCodes(t *testing.T, msg string, resp *http.Response, error
// resp.Header.Get("Content-Type"))
// }
expected := map[v2.ErrorCode]struct{}{}
counts := map[v2.ErrorCode]int{}
expected := map[errcode.ErrorCode]struct{}{}
counts := map[errcode.ErrorCode]int{}
// Initialize map with zeros for expected
for _, code := range errorCodes {
@ -779,11 +780,15 @@ func checkBodyHasErrorCodes(t *testing.T, msg string, resp *http.Response, error
counts[code] = 0
}
for _, err := range errs.Errors {
if _, ok := expected[err.Code]; !ok {
t.Fatalf("unexpected error code %v encountered during %s: %s ", err.Code, msg, string(p))
for _, e := range errs {
err, ok := e.(errcode.ErrorCoder)
if !ok {
t.Fatalf("not an ErrorCoder: %#v", e)
}
counts[err.Code]++
if _, ok := expected[err.ErrorCode()]; !ok {
t.Fatalf("unexpected error code %v encountered during %s: %s ", err.ErrorCode(), msg, string(p))
}
counts[err.ErrorCode()]++
}
// Ensure that counts of expected errors were all non-zero

62
registry/handlers/app.go
View File

@ -14,6 +14,7 @@ import (
"github.com/docker/distribution/configuration"
ctxu "github.com/docker/distribution/context"
"github.com/docker/distribution/notifications"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/docker/distribution/registry/auth"
registrymiddleware "github.com/docker/distribution/registry/middleware/registry"
@ -372,12 +373,11 @@ func (app *App) dispatcher(dispatch dispatchFunc) http.Handler {
switch err := err.(type) {
case distribution.ErrRepositoryUnknown:
context.Errors.Push(v2.ErrorCodeNameUnknown, err)
context.Errors = append(context.Errors, v2.ErrorCodeNameUnknown.WithDetail(err))
case distribution.ErrRepositoryNameInvalid:
context.Errors.Push(v2.ErrorCodeNameInvalid, err)
context.Errors = append(context.Errors, v2.ErrorCodeNameInvalid.WithDetail(err))
}
w.WriteHeader(http.StatusBadRequest)
serveJSON(w, context.Errors)
return
}
@ -390,8 +390,8 @@ func (app *App) dispatcher(dispatch dispatchFunc) http.Handler {
context.Repository, err = applyRepoMiddleware(context.Repository, app.Config.Middleware["repository"])
if err != nil {
ctxu.GetLogger(context).Errorf("error initializing repository middleware: %v", err)
context.Errors.Push(v2.ErrorCodeUnknown, err)
w.WriteHeader(http.StatusInternalServerError)
context.Errors = append(context.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
serveJSON(w, context.Errors)
return
}
@ -402,23 +402,33 @@ func (app *App) dispatcher(dispatch dispatchFunc) http.Handler {
// own errors if they need different behavior (such as range errors
// for layer upload).
if context.Errors.Len() > 0 {
if context.Value("http.response.status") == 0 {
// TODO(stevvooe): Getting this value from the context is a
// bit of a hack. We can further address with some of our
// future refactoring.
w.WriteHeader(http.StatusBadRequest)
}
app.logError(context, context.Errors)
serveJSON(w, context.Errors)
}
})
}
func (app *App) logError(context context.Context, errors v2.Errors) {
for _, e := range errors.Errors {
c := ctxu.WithValue(context, "err.code", e.Code)
c = ctxu.WithValue(c, "err.message", e.Message)
c = ctxu.WithValue(c, "err.detail", e.Detail)
func (app *App) logError(context context.Context, errors errcode.Errors) {
for _, e1 := range errors {
var c ctxu.Context
switch e1.(type) {
case errcode.Error:
e, _ := e1.(errcode.Error)
c = ctxu.WithValue(context, "err.code", e.Code)
c = ctxu.WithValue(c, "err.message", e.Code.Message())
c = ctxu.WithValue(c, "err.detail", e.Detail)
case errcode.ErrorCode:
e, _ := e1.(errcode.ErrorCode)
c = ctxu.WithValue(context, "err.code", e)
c = ctxu.WithValue(c, "err.message", e.Message())
default:
// just normal go 'error'
c = ctxu.WithValue(context, "err.code", errcode.ErrorCodeUnknown)
c = ctxu.WithValue(c, "err.message", e1.Error())
}
c = ctxu.WithLogger(c, ctxu.GetLogger(c,
"err.code",
"err.message",
@ -471,11 +481,10 @@ func (app *App) authorized(w http.ResponseWriter, r *http.Request, context *Cont
// base route is accessed. This section prevents us from making
// that mistake elsewhere in the code, allowing any operation to
// proceed.
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(http.StatusForbidden)
var errs v2.Errors
errs.Push(v2.ErrorCodeUnauthorized)
var errs errcode.Errors
errs = append(errs, v2.ErrorCodeUnauthorized)
serveJSON(w, errs)
return fmt.Errorf("forbidden: no repository name")
}
@ -485,11 +494,20 @@ func (app *App) authorized(w http.ResponseWriter, r *http.Request, context *Cont
if err != nil {
switch err := err.(type) {
case auth.Challenge:
// NOTE(duglin):
// Since err.ServeHTTP will set the HTTP status code for us
// we need to set the content-type here. The serveJSON
// func will try to do it but it'll be too late at that point.
// I would have have preferred to just have the auth.Challenge
// ServerHTTP func just add the WWW-Authenticate header and let
// serveJSON set the HTTP status code and content-type but I wasn't
// sure if that's an ok design change. STEVVOOE ?
w.Header().Set("Content-Type", "application/json; charset=utf-8")
err.ServeHTTP(w, r)
var errs v2.Errors
errs.Push(v2.ErrorCodeUnauthorized, accessRecords)
var errs errcode.Errors
errs = append(errs, v2.ErrorCodeUnauthorized.WithDetail(accessRecords))
serveJSON(w, errs)
default:
// This condition is a potential security problem either in

11
registry/handlers/app_test.go
View File

@ -9,6 +9,7 @@ import (
"testing"
"github.com/docker/distribution/configuration"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/docker/distribution/registry/auth"
_ "github.com/docker/distribution/registry/auth/silly"
@ -194,14 +195,18 @@ func TestNewApp(t *testing.T) {
t.Fatalf("unexpected WWW-Authenticate header: %q != %q", e, a)
}
var errs v2.Errors
var errs errcode.Errors
dec := json.NewDecoder(req.Body)
if err := dec.Decode(&errs); err != nil {
t.Fatalf("error decoding error response: %v", err)
}
if errs.Errors[0].Code != v2.ErrorCodeUnauthorized {
t.Fatalf("unexpected error code: %v != %v", errs.Errors[0].Code, v2.ErrorCodeUnauthorized)
err2, ok := errs[0].(errcode.ErrorCoder)
if !ok {
t.Fatalf("not an ErrorCoder: %#v", errs[0])
}
if err2.ErrorCode() != v2.ErrorCodeUnauthorized {
t.Fatalf("unexpected error code: %v != %v", err2.ErrorCode(), v2.ErrorCodeUnauthorized)
}
}

13
registry/handlers/blob.go
View File

@ -6,6 +6,7 @@ import (
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/gorilla/handlers"
)
@ -17,13 +18,12 @@ func blobDispatcher(ctx *Context, r *http.Request) http.Handler {
if err == errDigestNotAvailable {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
ctx.Errors.Push(v2.ErrorCodeDigestInvalid, err)
ctx.Errors = append(ctx.Errors, v2.ErrorCodeDigestInvalid.WithDetail(err))
})
}
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx.Errors.Push(v2.ErrorCodeDigestInvalid, err)
ctx.Errors = append(ctx.Errors, v2.ErrorCodeDigestInvalid.WithDetail(err))
})
}
@ -53,17 +53,16 @@ func (bh *blobHandler) GetBlob(w http.ResponseWriter, r *http.Request) {
desc, err := blobs.Stat(bh, bh.Digest)
if err != nil {
if err == distribution.ErrBlobUnknown {
w.WriteHeader(http.StatusNotFound)
bh.Errors.Push(v2.ErrorCodeBlobUnknown, bh.Digest)
bh.Errors = append(bh.Errors, v2.ErrorCodeBlobUnknown.WithDetail(bh.Digest))
} else {
bh.Errors.Push(v2.ErrorCodeUnknown, err)
bh.Errors = append(bh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
}
return
}
if err := blobs.ServeBlob(bh, w, r, desc.Digest); err != nil {
context.GetLogger(bh).Debugf("unexpected error getting blob HTTP handler: %v", err)
bh.Errors.Push(v2.ErrorCodeUnknown, err)
bh.Errors = append(bh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
}

75
registry/handlers/blobupload.go
View File

@ -10,6 +10,7 @@ import (
"github.com/docker/distribution"
ctxu "github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/gorilla/handlers"
)
@ -36,8 +37,7 @@ func blobUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
if err != nil {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctxu.GetLogger(ctx).Infof("error resolving upload: %v", err)
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadInvalid.WithDetail(err))
})
}
buh.State = state
@ -45,16 +45,14 @@ func blobUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
if state.Name != ctx.Repository.Name() {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctxu.GetLogger(ctx).Infof("mismatched repository name in upload state: %q != %q", state.Name, buh.Repository.Name())
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadInvalid.WithDetail(err))
})
}
if state.UUID != buh.UUID {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctxu.GetLogger(ctx).Infof("mismatched uuid in upload state: %q != %q", state.UUID, buh.UUID)
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadInvalid.WithDetail(err))
})
}
@ -64,14 +62,12 @@ func blobUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
ctxu.GetLogger(ctx).Errorf("error resolving upload: %v", err)
if err == distribution.ErrBlobUploadUnknown {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
buh.Errors.Push(v2.ErrorCodeBlobUploadUnknown, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadUnknown.WithDetail(err))
})
}
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusInternalServerError)
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
})
}
buh.Upload = upload
@ -85,16 +81,14 @@ func blobUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
defer upload.Close()
ctxu.GetLogger(ctx).Infof("error seeking blob upload: %v", err)
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadInvalid.WithDetail(err))
upload.Cancel(buh)
})
} else if nn != buh.State.Offset {
defer upload.Close()
ctxu.GetLogger(ctx).Infof("seek to wrong offest: %d != %d", nn, buh.State.Offset)
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadInvalid.WithDetail(err))
upload.Cancel(buh)
})
}
@ -125,8 +119,7 @@ func (buh *blobUploadHandler) StartBlobUpload(w http.ResponseWriter, r *http.Req
blobs := buh.Repository.Blobs(buh)
upload, err := blobs.Create(buh)
if err != nil {
w.WriteHeader(http.StatusInternalServerError) // Error conditions here?
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
@ -134,8 +127,7 @@ func (buh *blobUploadHandler) StartBlobUpload(w http.ResponseWriter, r *http.Req
defer buh.Upload.Close()
if err := buh.blobUploadResponse(w, r, true); err != nil {
w.WriteHeader(http.StatusInternalServerError) // Error conditions here?
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
@ -146,8 +138,7 @@ func (buh *blobUploadHandler) StartBlobUpload(w http.ResponseWriter, r *http.Req
// GetUploadStatus returns the status of a given upload, identified by id.
func (buh *blobUploadHandler) GetUploadStatus(w http.ResponseWriter, r *http.Request) {
if buh.Upload == nil {
w.WriteHeader(http.StatusNotFound)
buh.Errors.Push(v2.ErrorCodeBlobUploadUnknown)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadUnknown)
return
}
@ -155,8 +146,7 @@ func (buh *blobUploadHandler) GetUploadStatus(w http.ResponseWriter, r *http.Req
// resumable upload is supported. This will enable returning a non-zero
// range for clients to begin uploading at an offset.
if err := buh.blobUploadResponse(w, r, true); err != nil {
w.WriteHeader(http.StatusInternalServerError) // Error conditions here?
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
@ -167,14 +157,13 @@ func (buh *blobUploadHandler) GetUploadStatus(w http.ResponseWriter, r *http.Req
// PatchBlobData writes data to an upload.
func (buh *blobUploadHandler) PatchBlobData(w http.ResponseWriter, r *http.Request) {
if buh.Upload == nil {
w.WriteHeader(http.StatusNotFound)
buh.Errors.Push(v2.ErrorCodeBlobUploadUnknown)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadUnknown)
return
}
ct := r.Header.Get("Content-Type")
if ct != "" && ct != "application/octet-stream" {
w.WriteHeader(http.StatusBadRequest)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(fmt.Errorf("Bad Content-Type")))
// TODO(dmcgowan): encode error
return
}
@ -184,14 +173,12 @@ func (buh *blobUploadHandler) PatchBlobData(w http.ResponseWriter, r *http.Reque
// Copy the data
if _, err := io.Copy(buh.Upload, r.Body); err != nil {
ctxu.GetLogger(buh).Errorf("unknown error copying into upload: %v", err)
w.WriteHeader(http.StatusInternalServerError)
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
if err := buh.blobUploadResponse(w, r, false); err != nil {
w.WriteHeader(http.StatusInternalServerError) // Error conditions here?
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
@ -205,8 +192,7 @@ func (buh *blobUploadHandler) PatchBlobData(w http.ResponseWriter, r *http.Reque
// url of the blob.
func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *http.Request) {
if buh.Upload == nil {
w.WriteHeader(http.StatusNotFound)
buh.Errors.Push(v2.ErrorCodeBlobUploadUnknown)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadUnknown)
return
}
@ -214,24 +200,21 @@ func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *ht
if dgstStr == "" {
// no digest? return error, but allow retry.
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeDigestInvalid, "digest missing")
buh.Errors = append(buh.Errors, v2.ErrorCodeDigestInvalid.WithDetail("digest missing"))
return
}
dgst, err := digest.ParseDigest(dgstStr)
if err != nil {
// no digest? return error, but allow retry.
w.WriteHeader(http.StatusNotFound)
buh.Errors.Push(v2.ErrorCodeDigestInvalid, "digest parsing failed")
buh.Errors = append(buh.Errors, v2.ErrorCodeDigestInvalid.WithDetail("digest parsing failed"))
return
}
// Read in the data, if any.
if _, err := io.Copy(buh.Upload, r.Body); err != nil {
ctxu.GetLogger(buh).Errorf("unknown error copying into upload: %v", err)
w.WriteHeader(http.StatusInternalServerError)
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
@ -246,17 +229,14 @@ func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *ht
if err != nil {
switch err := err.(type) {
case distribution.ErrBlobInvalidDigest:
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeDigestInvalid, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeDigestInvalid.WithDetail(err))
default:
switch err {
case distribution.ErrBlobInvalidLength, distribution.ErrBlobDigestUnsupported:
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadInvalid.WithDetail(err))
default:
ctxu.GetLogger(buh).Errorf("unknown error completing upload: %#v", err)
w.WriteHeader(http.StatusInternalServerError)
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
}
}
@ -273,8 +253,7 @@ func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *ht
// Build our canonical blob url
blobURL, err := buh.urlBuilder.BuildBlobURL(buh.Repository.Name(), desc.Digest)
if err != nil {
buh.Errors.Push(v2.ErrorCodeUnknown, err)
w.WriteHeader(http.StatusInternalServerError)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
@ -287,16 +266,14 @@ func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *ht
// CancelBlobUpload cancels an in-progress upload of a blob.
func (buh *blobUploadHandler) CancelBlobUpload(w http.ResponseWriter, r *http.Request) {
if buh.Upload == nil {
w.WriteHeader(http.StatusNotFound)
buh.Errors.Push(v2.ErrorCodeBlobUploadUnknown)
buh.Errors = append(buh.Errors, v2.ErrorCodeBlobUploadUnknown)
return
}
w.Header().Set("Docker-Upload-UUID", buh.UUID)
if err := buh.Upload.Cancel(buh); err != nil {
ctxu.GetLogger(buh).Errorf("error encountered canceling upload: %v", err)
w.WriteHeader(http.StatusInternalServerError)
buh.Errors.PushErr(err)
buh.Errors = append(buh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
}
w.WriteHeader(http.StatusNoContent)

3
registry/handlers/context.go
View File

@ -8,6 +8,7 @@ import (
"github.com/docker/distribution"
ctxu "github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"golang.org/x/net/context"
)
@ -27,7 +28,7 @@ type Context struct {
// Errors is a collection of errors encountered during the request to be
// returned to the client API. If errors are added to the collection, the
// handler *must not* start the response via http.ResponseWriter.
Errors v2.Errors
Errors errcode.Errors
urlBuilder *v2.URLBuilder

18
registry/handlers/helpers.go
View File

@ -4,6 +4,8 @@ import (
"encoding/json"
"io"
"net/http"
"github.com/docker/distribution/registry/api/errcode"
)
// serveJSON marshals v and sets the content-type header to
@ -11,6 +13,22 @@ import (
// ResponseWriter.WriteHeader before this function.
func serveJSON(w http.ResponseWriter, v interface{}) error {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
sc := http.StatusInternalServerError
if errs, ok := v.(errcode.Errors); ok && len(errs) > 0 {
if err, ok := errs[0].(errcode.ErrorCoder); ok {
if sc2 := err.ErrorCode().Descriptor().HTTPStatusCode; sc2 != 0 {
sc = sc2
}
}
} else if err, ok := v.(errcode.ErrorCoder); ok {
if sc2 := err.ErrorCode().Descriptor().HTTPStatusCode; sc2 != 0 {
sc = sc2
}
}
w.WriteHeader(sc)
enc := json.NewEncoder(w)
if err := enc.Encode(v); err != nil {

36
registry/handlers/images.go
View File

@ -10,6 +10,7 @@ import (
ctxu "github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/manifest"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/gorilla/handlers"
"golang.org/x/net/context"
@ -63,8 +64,7 @@ func (imh *imageManifestHandler) GetImageManifest(w http.ResponseWriter, r *http
}
if err != nil {
imh.Errors.Push(v2.ErrorCodeManifestUnknown, err)
w.WriteHeader(http.StatusNotFound)
imh.Errors = append(imh.Errors, v2.ErrorCodeManifestUnknown.WithDetail(err))
return
}
@ -72,8 +72,7 @@ func (imh *imageManifestHandler) GetImageManifest(w http.ResponseWriter, r *http
if imh.Digest == "" {
dgst, err := digestManifest(imh, sm)
if err != nil {
imh.Errors.Push(v2.ErrorCodeDigestInvalid, err)
w.WriteHeader(http.StatusBadRequest)
imh.Errors = append(imh.Errors, v2.ErrorCodeDigestInvalid.WithDetail(err))
return
}
@ -94,15 +93,13 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
var manifest manifest.SignedManifest
if err := dec.Decode(&manifest); err != nil {
imh.Errors.Push(v2.ErrorCodeManifestInvalid, err)
w.WriteHeader(http.StatusBadRequest)
imh.Errors = append(imh.Errors, v2.ErrorCodeManifestInvalid.WithDetail(err))
return
}
dgst, err := digestManifest(imh, &manifest)
if err != nil {
imh.Errors.Push(v2.ErrorCodeDigestInvalid, err)
w.WriteHeader(http.StatusBadRequest)
imh.Errors = append(imh.Errors, v2.ErrorCodeDigestInvalid.WithDetail(err))
return
}
@ -110,8 +107,7 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
if imh.Tag != "" {
if manifest.Tag != imh.Tag {
ctxu.GetLogger(imh).Errorf("invalid tag on manifest payload: %q != %q", manifest.Tag, imh.Tag)
imh.Errors.Push(v2.ErrorCodeTagInvalid)
w.WriteHeader(http.StatusBadRequest)
imh.Errors = append(imh.Errors, v2.ErrorCodeTagInvalid)
return
}
@ -119,13 +115,11 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
} else if imh.Digest != "" {
if dgst != imh.Digest {
ctxu.GetLogger(imh).Errorf("payload digest does match: %q != %q", dgst, imh.Digest)
imh.Errors.Push(v2.ErrorCodeDigestInvalid)
w.WriteHeader(http.StatusBadRequest)
imh.Errors = append(imh.Errors, v2.ErrorCodeDigestInvalid)
return
}
} else {
imh.Errors.Push(v2.ErrorCodeTagInvalid, "no tag or digest specified")
w.WriteHeader(http.StatusBadRequest)
imh.Errors = append(imh.Errors, v2.ErrorCodeTagInvalid.WithDetail("no tag or digest specified"))
return
}
@ -137,22 +131,21 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
for _, verificationError := range err {
switch verificationError := verificationError.(type) {
case distribution.ErrManifestBlobUnknown:
imh.Errors.Push(v2.ErrorCodeBlobUnknown, verificationError.Digest)
imh.Errors = append(imh.Errors, v2.ErrorCodeBlobUnknown.WithDetail(verificationError.Digest))
case distribution.ErrManifestUnverified:
imh.Errors.Push(v2.ErrorCodeManifestUnverified)
imh.Errors = append(imh.Errors, v2.ErrorCodeManifestUnverified)
default:
if verificationError == digest.ErrDigestInvalidFormat {
imh.Errors.Push(v2.ErrorCodeDigestInvalid)
imh.Errors = append(imh.Errors, v2.ErrorCodeDigestInvalid)
} else {
imh.Errors.PushErr(verificationError)
imh.Errors = append(imh.Errors, errcode.ErrorCodeUnknown, verificationError)
}
}
}
default:
imh.Errors.PushErr(err)
imh.Errors = append(imh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
}
w.WriteHeader(http.StatusBadRequest)
return
}
@ -179,8 +172,7 @@ func (imh *imageManifestHandler) DeleteImageManifest(w http.ResponseWriter, r *h
// tag index entries a serious problem in eventually consistent storage.
// Once we work out schema version 2, the full deletion system will be
// worked out and we can add support back.
imh.Errors.Push(v2.ErrorCodeUnsupported)
w.WriteHeader(http.StatusBadRequest)
imh.Errors = append(imh.Errors, v2.ErrorCodeUnsupported)
}
// digestManifest takes a digest of the given manifest. This belongs somewhere

8
registry/handlers/tags.go
View File

@ -5,6 +5,7 @@ import (
"net/http"
"github.com/docker/distribution"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/gorilla/handlers"
)
@ -39,10 +40,9 @@ func (th *tagsHandler) GetTags(w http.ResponseWriter, r *http.Request) {
if err != nil {
switch err := err.(type) {
case distribution.ErrRepositoryUnknown:
w.WriteHeader(404)
th.Errors.Push(v2.ErrorCodeNameUnknown, map[string]string{"name": th.Repository.Name()})
th.Errors = append(th.Errors, v2.ErrorCodeNameUnknown.WithDetail(map[string]string{"name": th.Repository.Name()}))
default:
th.Errors.PushErr(err)
th.Errors = append(th.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
}
return
}
@ -54,7 +54,7 @@ func (th *tagsHandler) GetTags(w http.ResponseWriter, r *http.Request) {
Name: th.Repository.Name(),
Tags: tags,
}); err != nil {
th.Errors.PushErr(err)
th.Errors = append(th.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
}