122 lines
3.2 KiB
Go
122 lines
3.2 KiB
Go
// Copyright (c) Mainflux
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// SPDX-License-Identifier: Apache-2.0
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package api
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import (
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"context"
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"encoding/json"
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"net/http"
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kithttp "github.com/go-kit/kit/transport/http"
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"github.com/go-zoo/bone"
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"github.com/mainflux/mainflux"
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"github.com/mainflux/mainflux/internal/apiutil"
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"github.com/mainflux/mainflux/pkg/errors"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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const (
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ctSenmlJSON = "application/senml+json"
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ctSenmlCBOR = "application/senml+cbor"
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contentType = "application/json"
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)
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var errMalformedSubtopic = errors.New("malformed subtopic")
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// MakeHandler returns a HTTP handler for API endpoints.
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func MakeHandler(instanceID string) http.Handler {
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opts := []kithttp.ServerOption{
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kithttp.ServerErrorEncoder(encodeError),
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}
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r := bone.New()
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r.Post("/channels/:chanID/messages", otelhttp.NewHandler(kithttp.NewServer(
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sendMessageEndpoint(),
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decodeRequest,
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encodeResponse,
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opts...,
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), "publish"))
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r.Post("/channels/:chanID/messages/*", otelhttp.NewHandler(kithttp.NewServer(
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sendMessageEndpoint(),
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decodeRequest,
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encodeResponse,
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opts...,
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), "publish"))
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r.GetFunc("/health", mainflux.Health("http", instanceID))
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r.Handle("/metrics", promhttp.Handler())
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return r
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}
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func decodeRequest(_ context.Context, r *http.Request) (interface{}, error) {
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ct := r.Header.Get("Content-Type")
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if ct != ctSenmlJSON && ct != contentType && ct != ctSenmlCBOR {
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return nil, errors.Wrap(apiutil.ErrValidation, apiutil.ErrUnsupportedContentType)
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}
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return nil, nil
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}
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func encodeResponse(_ context.Context, w http.ResponseWriter, _ interface{}) error {
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w.WriteHeader(http.StatusAccepted)
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return nil
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}
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func encodeError(_ context.Context, err error, w http.ResponseWriter) {
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var wrapper error
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if errors.Contains(err, apiutil.ErrValidation) {
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wrapper, err = errors.Unwrap(err)
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}
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switch {
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case errors.Contains(err, errors.ErrAuthentication),
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errors.Contains(err, apiutil.ErrBearerKey),
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errors.Contains(err, apiutil.ErrBearerToken):
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w.WriteHeader(http.StatusUnauthorized)
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case errors.Contains(err, errors.ErrAuthorization):
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w.WriteHeader(http.StatusForbidden)
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case errors.Contains(err, apiutil.ErrUnsupportedContentType):
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w.WriteHeader(http.StatusUnsupportedMediaType)
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case errors.Contains(err, errMalformedSubtopic),
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errors.Contains(err, errors.ErrMalformedEntity):
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w.WriteHeader(http.StatusBadRequest)
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default:
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switch e, ok := status.FromError(err); {
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case ok:
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switch e.Code() {
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case codes.Unauthenticated:
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w.WriteHeader(http.StatusUnauthorized)
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case codes.PermissionDenied:
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w.WriteHeader(http.StatusForbidden)
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case codes.Internal:
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w.WriteHeader(http.StatusInternalServerError)
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case codes.NotFound:
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err = errors.ErrNotFound
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w.WriteHeader(http.StatusNotFound)
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default:
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w.WriteHeader(http.StatusInternalServerError)
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}
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default:
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w.WriteHeader(http.StatusInternalServerError)
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}
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}
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if wrapper != nil {
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err = errors.Wrap(wrapper, err)
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}
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if errorVal, ok := err.(errors.Error); ok {
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w.Header().Set("Content-Type", contentType)
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if err := json.NewEncoder(w).Encode(errorVal); err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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}
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}
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}
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