agola/internal/services/gateway/api/api.go

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// Copyright 2019 Sorint.lab
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
// See the License for the specific language governing permissions and
// limitations under the License.
package api
import (
"encoding/json"
"net/http"
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"net/url"
util "agola.io/agola/internal/util"
cstypes "agola.io/agola/services/configstore/types"
"github.com/gorilla/mux"
errors "golang.org/x/xerrors"
)
type ErrorResponse struct {
Message string `json:"message"`
}
func ErrorResponseFromError(err error) *ErrorResponse {
var aerr error
// use inner errors if of these types
switch {
case errors.Is(err, &util.ErrBadRequest{}):
var cerr *util.ErrBadRequest
errors.As(err, &cerr)
aerr = cerr
case errors.Is(err, &util.ErrNotFound{}):
var cerr *util.ErrNotFound
errors.As(err, &cerr)
aerr = cerr
case errors.Is(err, &util.ErrForbidden{}):
var cerr *util.ErrForbidden
errors.As(err, &cerr)
aerr = cerr
case errors.Is(err, &util.ErrUnauthorized{}):
var cerr *util.ErrUnauthorized
errors.As(err, &cerr)
aerr = cerr
case errors.Is(err, &util.ErrInternal{}):
var cerr *util.ErrInternal
errors.As(err, &cerr)
aerr = cerr
}
if aerr != nil {
return &ErrorResponse{Message: aerr.Error()}
}
// on generic error return an generic message to not leak the real error
return &ErrorResponse{Message: "internal server error"}
}
func httpError(w http.ResponseWriter, err error) bool {
if err == nil {
return false
}
response := ErrorResponseFromError(err)
resj, merr := json.Marshal(response)
if merr != nil {
w.WriteHeader(http.StatusInternalServerError)
return true
}
switch {
case errors.Is(err, &util.ErrBadRequest{}):
w.WriteHeader(http.StatusBadRequest)
_, _ = w.Write(resj)
case errors.Is(err, &util.ErrNotFound{}):
w.WriteHeader(http.StatusNotFound)
_, _ = w.Write(resj)
case errors.Is(err, &util.ErrForbidden{}):
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w.WriteHeader(http.StatusForbidden)
_, _ = w.Write(resj)
case errors.Is(err, &util.ErrUnauthorized{}):
w.WriteHeader(http.StatusUnauthorized)
_, _ = w.Write(resj)
case errors.Is(err, &util.ErrInternal{}):
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write(resj)
default:
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write(resj)
}
return true
}
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func httpResponse(w http.ResponseWriter, code int, res interface{}) error {
w.Header().Set("Content-Type", "application/json")
if res != nil {
resj, err := json.Marshal(res)
if err != nil {
httpError(w, err)
return err
}
w.WriteHeader(code)
_, err = w.Write(resj)
return err
}
w.WriteHeader(code)
return nil
}
func httpErrorFromRemote(w http.ResponseWriter, resp *http.Response, err error) bool {
if err != nil {
// on generic error return an generic message to not leak the real error
response := &ErrorResponse{Message: "internal server error"}
if resp != nil {
response = &ErrorResponse{Message: err.Error()}
}
resj, merr := json.Marshal(response)
if merr != nil {
w.WriteHeader(http.StatusInternalServerError)
return true
}
if resp != nil {
w.WriteHeader(resp.StatusCode)
} else {
w.WriteHeader(http.StatusInternalServerError)
}
_, _ = w.Write(resj)
return true
}
return false
}
func GetConfigTypeRef(r *http.Request) (cstypes.ConfigType, string, error) {
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vars := mux.Vars(r)
projectRef, err := url.PathUnescape(vars["projectref"])
if err != nil {
return "", "", util.NewErrBadRequest(errors.Errorf("wrong projectref %q: %w", vars["projectref"], err))
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}
if projectRef != "" {
return cstypes.ConfigTypeProject, projectRef, nil
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}
projectGroupRef, err := url.PathUnescape(vars["projectgroupref"])
if err != nil {
return "", "", util.NewErrBadRequest(errors.Errorf("wrong projectgroupref %q: %w", vars["projectgroupref"], err))
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}
if projectGroupRef != "" {
return cstypes.ConfigTypeProjectGroup, projectGroupRef, nil
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}
return "", "", util.NewErrBadRequest(errors.Errorf("cannot get project or projectgroup ref"))
}