73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
package client
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import (
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"github.com/docker/distribution/registry/api/errcode"
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)
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// UnexpectedHTTPStatusError is returned when an unexpected HTTP status is
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// returned when making a registry api call.
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type UnexpectedHTTPStatusError struct {
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Status string
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}
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func (e *UnexpectedHTTPStatusError) Error() string {
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return fmt.Sprintf("Received unexpected HTTP status: %s", e.Status)
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}
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// UnexpectedHTTPResponseError is returned when an expected HTTP status code
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// is returned, but the content was unexpected and failed to be parsed.
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type UnexpectedHTTPResponseError struct {
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ParseErr error
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Response []byte
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}
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func (e *UnexpectedHTTPResponseError) Error() string {
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return fmt.Sprintf("Error parsing HTTP response: %s: %q", e.ParseErr.Error(), string(e.Response))
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}
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func parseHTTPErrorResponse(r io.Reader) error {
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var errors errcode.Errors
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body, err := ioutil.ReadAll(r)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(body, &errors); err != nil {
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return &UnexpectedHTTPResponseError{
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ParseErr: err,
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Response: body,
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}
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}
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return errors
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}
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// HandleErrorResponse returns error parsed from HTTP response for an
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// unsuccessful HTTP response code (in the range 400 - 499 inclusive). An
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// UnexpectedHTTPStatusError returned for response code outside of expected
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// range.
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func HandleErrorResponse(resp *http.Response) error {
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if resp.StatusCode == 401 {
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err := parseHTTPErrorResponse(resp.Body)
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if uErr, ok := err.(*UnexpectedHTTPResponseError); ok {
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return errcode.ErrorCodeUnauthorized.WithDetail(uErr.Response)
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}
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return err
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}
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if resp.StatusCode >= 400 && resp.StatusCode < 500 {
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return parseHTTPErrorResponse(resp.Body)
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}
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return &UnexpectedHTTPStatusError{Status: resp.Status}
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}
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// SuccessStatus returns true if the argument is a successful HTTP response
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// code (in the range 200 - 399 inclusive).
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func SuccessStatus(status int) bool {
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return status >= 200 && status <= 399
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}
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