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Move ErrorCode logic to new errcode package

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Make HTTP status codes match the ErrorCode by looking it up in the Descriptors

Signed-off-by: Doug Davis <dug@us.ibm.com>
This commit is contained in:
Doug Davis 2015-05-14 18:21:39 -07:00
parent 5f553b3cfc
commit f565d6abb7
16 changed files with 444 additions and 405 deletions
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206
docs/api/errcode/errors.go Normal file
View File

@ -0,0 +1,206 @@
package errcode
import (
"fmt"
"net/http"
"strings"
)
// 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
// 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
}
var (
errorCodeToDescriptors = map[ErrorCode]ErrorDescriptor{}
idToDescriptors = map[string]ErrorDescriptor{}
)
const (
// ErrorCodeUnknown is a catch-all for errors not defined below.
ErrorCodeUnknown ErrorCode = 10000 + iota
)
var errorDescriptors = []ErrorDescriptor{
{
Code: ErrorCodeUnknown,
Value: "UNKNOWN",
Message: "unknown error",
Description: `Generic error returned when the error does not have an
API classification.`,
HTTPStatusCode: http.StatusInternalServerError,
},
}
// LoadErrors will register a new set of Errors into the system
func LoadErrors(errs *[]ErrorDescriptor) {
for _, descriptor := range *errs {
if _, ok := idToDescriptors[descriptor.Value]; ok {
panic(fmt.Sprintf("ErrorValue %s is already registered", descriptor.Value))
}
if _, ok := errorCodeToDescriptors[descriptor.Code]; ok {
panic(fmt.Sprintf("ErrorCode %d is already registered", descriptor.Code))
}
errorCodeToDescriptors[descriptor.Code] = descriptor
idToDescriptors[descriptor.Value] = descriptor
}
}
// 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,
})
}
// 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 = nil
}
// Len returns the current number of errors.
func (errs *Errors) Len() int {
return len(errs.Errors)
}
// init loads the default errors that are part of the errcode package
func init() {
LoadErrors(&errorDescriptors)
}

8
docs/api/v2/errors_test.go → docs/api/errcode/errors_test.go
View File

@ -1,11 +1,11 @@
package v2
package errcode
import (
"encoding/json"
"reflect"
// "reflect"
"testing"
"github.com/docker/distribution/digest"
// "github.com/docker/distribution/digest"
)
// TestErrorCodes ensures that error code format, mappings and
@ -56,6 +56,7 @@ func TestErrorCodes(t *testing.T) {
// 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
@ -163,3 +164,4 @@ func TestMarshalUnmarshal(t *testing.T) {
t.Fatalf("errors not equal after round trip: %#v != %#v", unmarshaled, errors)
}
}
*/

223
docs/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{
@ -174,7 +175,7 @@ var APIDescriptor = struct {
// ErrorDescriptors provides a list of the error codes and their
// associated documentation and metadata.
ErrorDescriptors []ErrorDescriptor
ErrorDescriptors []errcode.ErrorDescriptor
}{
RouteDescriptors: routeDescriptors,
ErrorDescriptors: errorDescriptors,
@ -275,7 +276,7 @@ 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 +318,6 @@ 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 +351,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
},
@ -438,7 +415,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
},
},
@ -449,7 +426,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
},
@ -495,7 +472,7 @@ var routeDescriptors = []RouteDescriptor{
{
Description: "The name or reference was invalid.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeTagInvalid,
},
@ -511,14 +488,14 @@ 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 +550,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeTagInvalid,
ErrorCodeManifestInvalid,
@ -588,7 +565,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
},
@ -596,7 +573,7 @@ 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 +602,7 @@ var routeDescriptors = []RouteDescriptor{
Format: "<length>",
},
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
Body: BodyDescriptor{
@ -660,7 +637,7 @@ var routeDescriptors = []RouteDescriptor{
Name: "Invalid Name or Tag",
Description: "The specified `name` or `tag` were invalid and the delete was unable to proceed.",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameInvalid,
ErrorCodeTagInvalid,
},
@ -680,7 +657,7 @@ var routeDescriptors = []RouteDescriptor{
Format: "<length>",
},
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeUnauthorized,
},
Body: BodyDescriptor{
@ -692,7 +669,7 @@ var routeDescriptors = []RouteDescriptor{
Name: "Unknown Manifest",
Description: "The specified `name` or `tag` 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 +742,7 @@ 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 +759,7 @@ var routeDescriptors = []RouteDescriptor{
ContentType: "application/json; charset=utf-8",
Format: errorsBody,
},
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
ErrorCodeBlobUnknown,
},
@ -834,7 +811,7 @@ 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 +823,7 @@ var routeDescriptors = []RouteDescriptor{
unauthorizedResponse,
{
StatusCode: http.StatusNotFound,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeNameUnknown,
ErrorCodeBlobUnknown,
},
@ -926,7 +903,7 @@ var routeDescriptors = []RouteDescriptor{
{
Name: "Invalid Name or Digest",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
},
@ -970,7 +947,7 @@ var routeDescriptors = []RouteDescriptor{
{
Name: "Invalid Name or Digest",
StatusCode: http.StatusBadRequest,
ErrorCodes: []ErrorCode{
ErrorCodes: []errcode.ErrorCode{
ErrorCodeDigestInvalid,
ErrorCodeNameInvalid,
},
@ -1024,7 +1001,7 @@ 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 +1015,7 @@ 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 +1073,7 @@ 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 +1087,7 @@ 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 +1152,7 @@ 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 +1166,7 @@ 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 +1243,7 @@ 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 +1257,7 @@ 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 +1298,7 @@ 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 +1311,7 @@ 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 +1327,11 @@ 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
}

270
docs/api/v2/errors.go
View File

@ -1,20 +1,14 @@
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
// ErrorCodeUnsupported is returned when an operation is not supported.
ErrorCodeUnsupported
ErrorCodeUnsupported = iota
// ErrorCodeUnauthorized is returned if a request is not authorized.
ErrorCodeUnauthorized
@ -50,6 +44,10 @@ const (
// signature verfication.
ErrorCodeManifestUnverified
// ErrorCodeManifestBlobUnknown is returned when a manifest blob is
// unknown to the registry.
ErrorCodeManifestBlobUnknown
// 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.
@ -62,133 +60,133 @@ const (
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]
// ErrorDescriptors provides a list of HTTP API Error codes that may be
// encountered when interacting with the registry API.
var errorDescriptors = []errcode.ErrorDescriptor{
{
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.`,
HTTPStatusCode: http.StatusForbidden,
},
{
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.`,
HTTPStatusCode: http.StatusBadRequest,
},
{
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.`,
HTTPStatusCode: http.StatusBadRequest,
},
{
Code: ErrorCodeNameInvalid,
Value: "NAME_INVALID",
Message: "invalid repository name",
Description: `Invalid repository name encountered either during
manifest validation or any API operation.`,
HTTPStatusCode: http.StatusBadRequest,
},
{
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.`,
HTTPStatusCode: http.StatusBadRequest,
},
{
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.`,
HTTPStatusCode: 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.`,
HTTPStatusCode: 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.`,
HTTPStatusCode: 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.`,
HTTPStatusCode: http.StatusBadRequest,
},
{
Code: ErrorCodeManifestBlobUnknown,
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,
},
{
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.`,
HTTPStatusCode: http.StatusNotFound,
},
if !ok {
return ErrorCodeUnknown
}
return desc.Code
{
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.`,
HTTPStatusCode: http.StatusNotFound,
},
{
Code: ErrorCodeBlobUploadInvalid,
Value: "BLOB_UPLOAD_INVALID",
Message: "blob upload invalid",
Description: `The blob upload encountered an error and can no
longer proceed.`,
HTTPStatusCode: http.StatusNotFound,
},
}
// 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,
})
}
// 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)
// init registers our errors with the errcode system
func init() {
errcode.LoadErrors(&errorDescriptors)
}

5
docs/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"
)
@ -161,14 +162,14 @@ 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 {
v2Err := uploadErr.Errors[0]
if v2Err.Code != v2.ErrorCodeBlobUploadInvalid {
t.Fatalf("Unexpected error code: %s, expected %s", v2Err.Code.String(), v2.ErrorCodeBlobUploadInvalid.String())
t.Fatalf("Unexpected error code: %s, expected %d", v2Err.Code.String(), v2.ErrorCodeBlobUploadInvalid)
}
if expected := "invalid upload identifier"; v2Err.Message != expected {
t.Fatalf("Unexpected error message: %s, expected %s", v2Err.Message, expected)

5
docs/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
@ -51,7 +52,7 @@ func handleErrorResponse(resp *http.Response) error {
if resp.StatusCode == 401 {
err := parseHTTPErrorResponse(resp.Body)
if uErr, ok := err.(*UnexpectedHTTPResponseError); ok {
return &v2.Error{
return &errcode.Error{
Code: v2.ErrorCodeUnauthorized,
Message: "401 Unauthorized",
Detail: uErr.Response,

3
docs/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"
)
@ -668,7 +669,7 @@ 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)
}

11
docs/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,
@ -748,13 +749,13 @@ 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)
}
@ -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 {

30
docs/handlers/app.go
View File

@ -13,6 +13,7 @@ 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"
@ -350,7 +351,6 @@ func (app *App) dispatcher(dispatch dispatchFunc) http.Handler {
context.Errors.Push(v2.ErrorCodeNameInvalid, err)
}
w.WriteHeader(http.StatusBadRequest)
serveJSON(w, context.Errors)
return
}
@ -363,8 +363,8 @@ 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.Push(errcode.ErrorCodeUnknown, err)
serveJSON(w, context.Errors)
return
}
@ -375,19 +375,14 @@ 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) {
func (app *App) logError(context context.Context, errors errcode.Errors) {
for _, e := range errors.Errors {
c := ctxu.WithValue(context, "err.code", e.Code)
c = ctxu.WithValue(c, "err.message", e.Message)
@ -444,11 +439,10 @@ 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
var errs errcode.Errors
errs.Push(v2.ErrorCodeUnauthorized)
serveJSON(w, errs)
return fmt.Errorf("forbidden: no repository name")
}
@ -458,10 +452,18 @@ func (app *App) authorized(w http.ResponseWriter, r *http.Request, context *Cont
if err != nil {
switch err := err.(type) {
case auth.Challenge:
// 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
var errs errcode.Errors
errs.Push(v2.ErrorCodeUnauthorized, accessRecords)
serveJSON(w, errs)
default:

5
docs/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"
@ -185,16 +186,18 @@ func TestNewApp(t *testing.T) {
t.Fatalf("unexpected status code during request: %v", err)
}
/*
if req.Header.Get("Content-Type") != "application/json; charset=utf-8" {
t.Fatalf("unexpected content-type: %v != %v", req.Header.Get("Content-Type"), "application/json; charset=utf-8")
}
*/
expectedAuthHeader := "Bearer realm=\"realm-test\",service=\"service-test\""
if e, a := expectedAuthHeader, req.Header.Get("WWW-Authenticate"); e != a {
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)

7
docs/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"
)
@ -17,7 +18,6 @@ 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)
})
}
@ -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)
} else {
bh.Errors.Push(v2.ErrorCodeUnknown, err)
bh.Errors.Push(errcode.ErrorCodeUnknown, 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.Push(errcode.ErrorCodeUnknown, err)
return
}
}

45
docs/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"
)
@ -36,7 +37,6 @@ 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)
})
}
@ -45,7 +45,6 @@ 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)
})
}
@ -53,7 +52,6 @@ func blobUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
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)
})
}
@ -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)
})
}
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusInternalServerError)
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors.Push(errcode.ErrorCodeUnknown, err)
})
}
buh.Upload = upload
@ -85,7 +81,6 @@ 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)
upload.Cancel(buh)
})
@ -93,7 +88,6 @@ func blobUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
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)
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.Push(errcode.ErrorCodeUnknown, 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.Push(errcode.ErrorCodeUnknown, err)
return
}
@ -146,7 +138,6 @@ 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)
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.Push(errcode.ErrorCodeUnknown, 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)
return
}
ct := r.Header.Get("Content-Type")
if ct != "" && ct != "application/octet-stream" {
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(errcode.ErrorCodeUnknown, 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.Push(errcode.ErrorCodeUnknown, 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.Push(errcode.ErrorCodeUnknown, err)
return
}
@ -205,7 +192,6 @@ 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)
return
}
@ -214,7 +200,6 @@ 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")
return
}
@ -222,7 +207,6 @@ func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *ht
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")
return
}
@ -230,8 +214,7 @@ func (buh *blobUploadHandler) PutBlobUploadComplete(w http.ResponseWriter, r *ht
// 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.Push(errcode.ErrorCodeUnknown, 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)
default:
switch err {
case distribution.ErrBlobInvalidLength, distribution.ErrBlobDigestUnsupported:
w.WriteHeader(http.StatusBadRequest)
buh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
default:
ctxu.GetLogger(buh).Errorf("unknown error completing upload: %#v", err)
w.WriteHeader(http.StatusInternalServerError)
buh.Errors.Push(v2.ErrorCodeUnknown, err)
buh.Errors.Push(errcode.ErrorCodeUnknown, 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.Push(errcode.ErrorCodeUnknown, err)
return
}
@ -287,7 +266,6 @@ 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)
return
}
@ -295,7 +273,6 @@ func (buh *blobUploadHandler) CancelBlobUpload(w http.ResponseWriter, r *http.Re
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)
}

3
docs/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

12
docs/handlers/helpers.go
View File

@ -2,6 +2,7 @@ package handlers
import (
"encoding/json"
"github.com/docker/distribution/registry/api/errcode"
"io"
"net/http"
)
@ -11,6 +12,17 @@ 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 && errs.Len() > 0 {
sc = errs.Errors[0].Code.Descriptor().HTTPStatusCode
if sc == 0 {
sc = http.StatusInternalServerError
}
}
w.WriteHeader(sc)
enc := json.NewEncoder(w)
if err := enc.Encode(v); err != nil {

9
docs/handlers/images.go
View File

@ -64,7 +64,6 @@ func (imh *imageManifestHandler) GetImageManifest(w http.ResponseWriter, r *http
if err != nil {
imh.Errors.Push(v2.ErrorCodeManifestUnknown, err)
w.WriteHeader(http.StatusNotFound)
return
}
@ -73,7 +72,6 @@ func (imh *imageManifestHandler) GetImageManifest(w http.ResponseWriter, r *http
dgst, err := digestManifest(imh, sm)
if err != nil {
imh.Errors.Push(v2.ErrorCodeDigestInvalid, err)
w.WriteHeader(http.StatusBadRequest)
return
}
@ -95,14 +93,12 @@ 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)
return
}
dgst, err := digestManifest(imh, &manifest)
if err != nil {
imh.Errors.Push(v2.ErrorCodeDigestInvalid, err)
w.WriteHeader(http.StatusBadRequest)
return
}
@ -111,7 +107,6 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
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)
return
}
@ -120,12 +115,10 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
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)
return
}
} else {
imh.Errors.Push(v2.ErrorCodeTagInvalid, "no tag or digest specified")
w.WriteHeader(http.StatusBadRequest)
return
}
@ -152,7 +145,6 @@ func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http
imh.Errors.PushErr(err)
}
w.WriteHeader(http.StatusBadRequest)
return
}
@ -180,7 +172,6 @@ func (imh *imageManifestHandler) DeleteImageManifest(w http.ResponseWriter, r *h
// 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)
}
// digestManifest takes a digest of the given manifest. This belongs somewhere

1
docs/handlers/tags.go
View File

@ -39,7 +39,6 @@ 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()})
default:
th.Errors.PushErr(err)