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Export ServeJSON for serving error codes

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This changeset provides a common http handler for serving errcodes. This should
unify http responses across webservices in the face of errors.

Several type assertions have been added, as well, to ensure the error interface
is implemented.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day 2015-07-16 11:35:02 -07:00
parent c958371f4b
commit 81c21411e8
4 changed files with 65 additions and 44 deletions
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6
docs/api/errcode/errors.go
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@ -16,6 +16,8 @@ type ErrorCoder interface {
// and the integer format may change and should *never* be exported.
type ErrorCode int
var _ error = ErrorCode(0)
// ErrorCode just returns itself
func (ec ErrorCode) ErrorCode() ErrorCode {
return ec
@ -93,6 +95,8 @@ type Error struct {
// variable substitution right before showing the message to the user
}
var _ error = Error{}
// ErrorCode returns the ID/Value of this Error
func (e Error) ErrorCode() ErrorCode {
return e.Code
@ -163,6 +167,8 @@ func ParseErrorCode(value string) ErrorCode {
// for use within the application.
type Errors []error
var _ error = Errors{}
func (errs Errors) Error() string {
switch len(errs) {
case 0: