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144 lines
4.5 KiB
144 lines
4.5 KiB
/*
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* Minimalist Object Storage, (C) 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package api
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import (
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"net/http"
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"strings"
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"github.com/minio-io/minio/pkg/api/config"
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)
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type vHandler struct {
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conf config.Config
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handler http.Handler
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}
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type rHandler struct {
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handler http.Handler
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}
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// strip AccessKey from authorization header
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func stripAccessKey(r *http.Request) string {
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fields := strings.Fields(r.Header.Get("Authorization"))
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if len(fields) < 2 {
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return ""
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}
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splits := strings.Split(fields[1], ":")
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if len(splits) < 2 {
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return ""
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}
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return splits[0]
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}
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// Validate handler is wrapper handler used for API request validation with authorization header.
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// Current authorization layer supports S3's standard HMAC based signature request.
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func validateHandler(conf config.Config, h http.Handler) http.Handler {
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return vHandler{conf, h}
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}
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// Validate handler ServeHTTP() wrapper
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func (h vHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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accessKey := stripAccessKey(r)
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acceptsContentType := getContentType(r)
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if accessKey != "" {
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if err := h.conf.ReadConfig(); err != nil {
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error := getErrorCode(InternalError)
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errorResponse := getErrorResponse(error, "")
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setCommonHeaders(w, getContentTypeString(acceptsContentType))
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w.WriteHeader(error.HTTPStatusCode)
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w.Write(encodeErrorResponse(errorResponse, acceptsContentType))
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} else {
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user, ok := h.conf.Users[accessKey]
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if ok == false {
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error := getErrorCode(AccessDenied)
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errorResponse := getErrorResponse(error, "")
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setCommonHeaders(w, getContentTypeString(acceptsContentType))
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w.WriteHeader(error.HTTPStatusCode)
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w.Write(encodeErrorResponse(errorResponse, acceptsContentType))
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} else {
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ok, _ = ValidateRequest(user, r)
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if ok {
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h.handler.ServeHTTP(w, r)
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} else {
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error := getErrorCode(AccessDenied)
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errorResponse := getErrorResponse(error, "")
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setCommonHeaders(w, getContentTypeString(acceptsContentType))
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w.WriteHeader(error.HTTPStatusCode)
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w.Write(encodeErrorResponse(errorResponse, acceptsContentType))
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}
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}
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}
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} else {
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// Control reaches when no access key is found, ideally we would
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// like to throw back `403`. But for now with our tests lacking
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// this functionality it is better for us to be serving anonymous
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// requests as well.
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// We should remove this after adding tests to support signature request
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h.handler.ServeHTTP(w, r)
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// ## Uncommented below links of code after disabling anonymous requests
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// error := errorCodeError(AccessDenied)
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// errorResponse := getErrorResponse(error, "")
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// w.WriteHeader(error.HTTPStatusCode)
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// w.Write(writeErrorResponse(w, errorResponse, acceptsContentType))
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}
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}
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// Ignore resources handler is wrapper handler used for API request resource validation
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// Since we do not support all the S3 queries, it is necessary for us to throw back a
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// valid error message indicating such a feature to have been not implemented.
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func ignoreResourcesHandler(h http.Handler) http.Handler {
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return rHandler{h}
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}
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// Resource handler ServeHTTP() wrapper
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func (h rHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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acceptsContentType := getContentType(r)
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if ignoreUnImplementedObjectResources(r) || ignoreUnImplementedBucketResources(r) {
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error := getErrorCode(NotImplemented)
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errorResponse := getErrorResponse(error, "")
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setCommonHeaders(w, getContentTypeString(acceptsContentType))
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w.WriteHeader(error.HTTPStatusCode)
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w.Write(encodeErrorResponse(errorResponse, acceptsContentType))
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} else {
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h.handler.ServeHTTP(w, r)
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}
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}
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//// helpers
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// Checks requests for unimplemented Bucket resources
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func ignoreUnImplementedBucketResources(req *http.Request) bool {
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q := req.URL.Query()
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for name := range q {
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if unimplementedBucketResourceNames[name] {
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return true
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}
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}
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return false
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}
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// Checks requests for unimplemented Object resources
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func ignoreUnImplementedObjectResources(req *http.Request) bool {
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q := req.URL.Query()
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for name := range q {
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if unimplementedObjectResourceNames[name] {
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return true
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}
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}
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return false
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}
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