storj/pkg/satellite/satelliteweb/api.go

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// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package satelliteweb
import (
"context"
"encoding/json"
"io/ioutil"
"net/http"
"strings"
"github.com/graphql-go/graphql"
"github.com/zeebo/errs"
"storj.io/storj/pkg/auth"
"storj.io/storj/pkg/satellite/satelliteweb/satelliteql"
"storj.io/storj/pkg/utils"
)
const (
authorization = "Authorization"
contentType = "Content-Type"
authorizationBearer = "Bearer "
applicationJSON = "application/json"
applicationGraphql = "application/graphql"
)
// JSON request from graphql clients
type graphqlJSON struct {
Query string
OperationName string
Variables map[string]interface{}
}
func (gw *gateway) grapqlHandler(w http.ResponseWriter, req *http.Request) {
w.Header().Set(contentType, applicationJSON)
token := getToken(req)
query, err := getQuery(req)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
result := graphql.Do(graphql.Params{
Schema: gw.schema,
Context: auth.WithAPIKey(context.Background(), []byte(token)),
RequestString: query.Query,
VariableValues: query.Variables,
OperationName: query.OperationName,
})
err = json.NewEncoder(w).Encode(result)
if err != nil {
gw.logger.Error(err)
return
}
gw.logger.Debug(result)
}
// getToken retrieves token from request
func getToken(req *http.Request) string {
value := req.Header.Get(authorization)
if value == "" {
return ""
}
if !strings.HasPrefix(value, authorizationBearer) {
return ""
}
return value[len(authorizationBearer):]
}
// getQuery retrieves graphql query from request
func getQuery(req *http.Request) (query graphqlJSON, err error) {
switch req.Method {
case http.MethodGet:
query.Query = req.URL.Query().Get(satelliteql.Query)
return query, nil
case http.MethodPost:
return queryPOST(req)
default:
return query, errs.New("wrong http request type")
}
}
// queryPOST retrieves graphql query from POST request
func queryPOST(req *http.Request) (query graphqlJSON, err error) {
switch typ := req.Header.Get(contentType); typ {
case applicationGraphql:
body, err := ioutil.ReadAll(req.Body)
query.Query = string(body)
return query, utils.CombineErrors(err, req.Body.Close())
case applicationJSON:
err := json.NewDecoder(req.Body).Decode(&query)
return query, utils.CombineErrors(err, req.Body.Close())
default:
return query, errs.New("can't parse request body of type %s", typ)
}
}