github.com/kaisenlinux/docker.io@v0.0.0-20230510090727-ea55db55fac7/engine/api/server/errorhandler.go (about)

     1  package server
     2  
     3  import (
     4  	"net/http"
     5  
     6  	"github.com/docker/docker/api/server/httpstatus"
     7  	"github.com/docker/docker/api/server/httputils"
     8  	"github.com/docker/docker/api/types"
     9  	"github.com/docker/docker/api/types/versions"
    10  	"github.com/gorilla/mux"
    11  	"google.golang.org/grpc/status"
    12  )
    13  
    14  // makeErrorHandler makes an HTTP handler that decodes a Docker error and
    15  // returns it in the response.
    16  func makeErrorHandler(err error) http.HandlerFunc {
    17  	return func(w http.ResponseWriter, r *http.Request) {
    18  		statusCode := httpstatus.FromError(err)
    19  		vars := mux.Vars(r)
    20  		if apiVersionSupportsJSONErrors(vars["version"]) {
    21  			response := &types.ErrorResponse{
    22  				Message: err.Error(),
    23  			}
    24  			_ = httputils.WriteJSON(w, statusCode, response)
    25  		} else {
    26  			http.Error(w, status.Convert(err).Message(), statusCode)
    27  		}
    28  	}
    29  }
    30  
    31  func apiVersionSupportsJSONErrors(version string) bool {
    32  	const firstAPIVersionWithJSONErrors = "1.23"
    33  	return version == "" || versions.GreaterThan(version, firstAPIVersionWithJSONErrors)
    34  }