weed/s3api: rearrange s3 methods handlers to ensure correct methods requesting

Otherwise current calls for some methods (i.e. GetObjectAcl) ends up with wrong method selection (i.e. GetObject).

Added generic comment rule of traversing methods

weed/s3api/s3api_server.go

@@ -77,10 +77,13 @@ func (s3a *S3ApiServer) registerRouter(router *mux.Router) {
 
 	for _, bucket := range routers {
 
-		// HeadObject
-		bucket.Methods("HEAD").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.HeadObjectHandler, ACTION_READ), "GET"))
-		// HeadBucket
-		bucket.Methods("HEAD").HandlerFunc(track(s3a.iam.Auth(s3a.HeadBucketHandler, ACTION_READ), "GET"))
+		// each case should follow the next rule:
+		// - requesting object with query must precede any other methods
+		// - requesting object must precede any methods with buckets
+		// - requesting bucket with query must precede raw methods with buckets
+		// - requesting bucket must be processed in the end
+
+		// objects with query
 
 		// CopyObjectPart
 		bucket.Methods("PUT").Path("/{object:.+}").HeadersRegexp("X-Amz-Copy-Source", `.*?(\/|%2F).*?`).HandlerFunc(track(s3a.iam.Auth(s3a.CopyObjectPartHandler, ACTION_WRITE), "PUT")).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}")
@@ -113,69 +116,88 @@ func (s3a *S3ApiServer) registerRouter(router *mux.Router) {
 		// PutObjectLockConfiguration
 		bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.PutObjectLockConfigurationHandler, ACTION_WRITE), "PUT")).Queries("object-lock", "")
 
+		// GetObjectACL
+		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.GetObjectAclHandler, ACTION_READ), "GET")).Queries("acl", "")
+
+		// objects with query
+
+		// raw objects
+
+		// HeadObject
+		bucket.Methods("HEAD").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.HeadObjectHandler, ACTION_READ), "GET"))
+
+		// GetObject, but directory listing is not supported
+		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.GetObjectHandler, ACTION_READ), "GET"))
+
 		// CopyObject
 		bucket.Methods("PUT").Path("/{object:.+}").HeadersRegexp("X-Amz-Copy-Source", ".*?(\\/|%2F).*?").HandlerFunc(track(s3a.iam.Auth(s3a.CopyObjectHandler, ACTION_WRITE), "COPY"))
 		// PutObject
 		bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.PutObjectHandler, ACTION_WRITE), "PUT"))
-
 		// DeleteObject
 		bucket.Methods("DELETE").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.DeleteObjectHandler, ACTION_WRITE), "DELETE"))
 
-		// ListObjectsV2
-		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.ListObjectsV2Handler, ACTION_LIST), "LIST")).Queries("list-type", "2")
-		// GetObject, but directory listing is not supported
-		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(track(s3a.iam.Auth(s3a.GetObjectHandler, ACTION_READ), "GET"))
+		// raw objects
 
-		// PostPolicy
-		bucket.Methods("POST").HeadersRegexp("Content-Type", "multipart/form-data*").HandlerFunc(track(s3a.iam.Auth(s3a.PostPolicyBucketHandler, ACTION_WRITE), "POST"))
+		// buckets with query
 
 		// DeleteMultipleObjects
 		bucket.Methods("POST").HandlerFunc(track(s3a.iam.Auth(s3a.DeleteMultipleObjectsHandler, ACTION_WRITE), "DELETE")).Queries("delete", "")
 
 		// GetBucketACL
-		bucket.Methods("GET").HandlerFunc(s3a.iam.Auth(s3a.GetBucketAclHandler, ACTION_READ)).Queries("acl", "")
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.GetBucketAclHandler, ACTION_READ), "GET")).Queries("acl", "")
 		// PutBucketACL
-		bucket.Methods("PUT").HandlerFunc(s3a.iam.Auth(s3a.PutBucketAclHandler, ACTION_WRITE)).Queries("acl", "")
-		// GetBucketPolicy
-		bucket.Methods("GET").HandlerFunc(s3a.iam.Auth(s3a.GetBucketPolicyHandler, ACTION_READ)).Queries("policy", "")
+		bucket.Methods("PUT").HandlerFunc(track(s3a.iam.Auth(s3a.PutBucketAclHandler, ACTION_WRITE), "PUT")).Queries("acl", "")
 
+		// GetBucketPolicy
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.GetBucketPolicyHandler, ACTION_READ), "GET")).Queries("policy", "")
 		// PutBucketPolicy
-		bucket.Methods("PUT").HandlerFunc(s3a.iam.Auth(s3a.PutBucketPolicyHandler, ACTION_WRITE)).Queries("policy", "")
+		bucket.Methods("PUT").HandlerFunc(track(s3a.iam.Auth(s3a.PutBucketPolicyHandler, ACTION_WRITE), "PUT")).Queries("policy", "")
 		// DeleteBucketPolicy
-		bucket.Methods("DELETE").HandlerFunc(s3a.iam.Auth(s3a.DeleteBucketPolicyHandler, ACTION_WRITE)).Queries("policy", "")
+		bucket.Methods("DELETE").HandlerFunc(track(s3a.iam.Auth(s3a.DeleteBucketPolicyHandler, ACTION_WRITE), "DELETE")).Queries("policy", "")
 
 		// GetBucketCors
-		bucket.Methods("GET").HandlerFunc(s3a.iam.Auth(s3a.GetBucketCorsHandler, ACTION_READ)).Queries("cors", "")
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.GetBucketCorsHandler, ACTION_READ), "GET")).Queries("cors", "")
 		// PutBucketCors
-		bucket.Methods("PUT").HandlerFunc(s3a.iam.Auth(s3a.PutBucketCorsHandler, ACTION_WRITE)).Queries("cors", "")
+		bucket.Methods("PUT").HandlerFunc(track(s3a.iam.Auth(s3a.PutBucketCorsHandler, ACTION_WRITE), "PUT")).Queries("cors", "")
 		// DeleteBucketCors
-		bucket.Methods("DELETE").HandlerFunc(s3a.iam.Auth(s3a.DeleteBucketCorsHandler, ACTION_WRITE)).Queries("cors", "")
+		bucket.Methods("DELETE").HandlerFunc(track(s3a.iam.Auth(s3a.DeleteBucketCorsHandler, ACTION_WRITE), "DELETE")).Queries("cors", "")
+
+		// GetBucketLifecycleConfiguration
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.GetBucketLifecycleConfigurationHandler, ACTION_READ), "GET")).Queries("lifecycle", "")
+		// PutBucketLifecycleConfiguration
+		bucket.Methods("PUT").HandlerFunc(track(s3a.iam.Auth(s3a.PutBucketLifecycleConfigurationHandler, ACTION_WRITE), "PUT")).Queries("lifecycle", "")
+		// DeleteBucketLifecycleConfiguration
+		bucket.Methods("DELETE").HandlerFunc(track(s3a.iam.Auth(s3a.DeleteBucketLifecycleHandler, ACTION_WRITE), "DELETE")).Queries("lifecycle", "")
 
 		// GetBucketLocation
-		bucket.Methods("GET").HandlerFunc(s3a.iam.Auth(s3a.GetBucketLocationHandler, ACTION_READ)).Queries("location", "")
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.GetBucketLocationHandler, ACTION_READ), "GET")).Queries("location", "")
 
 		// GetBucketRequestPayment
-		bucket.Methods("GET").HandlerFunc(s3a.iam.Auth(s3a.GetBucketRequestPaymentHandler, ACTION_READ)).Queries("requestPayment", "")
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.GetBucketRequestPaymentHandler, ACTION_READ), "GET")).Queries("requestPayment", "")
 
-		// GetObjectACL
-		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(s3a.iam.Auth(s3a.GetObjectAclHandler, ACTION_READ)).Queries("acl", "")
+		// ListObjectsV2
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.ListObjectsV2Handler, ACTION_LIST), "LIST")).Queries("list-type", "2")
 
-		// GetBucketLifecycleConfiguration
-		bucket.Methods("GET").HandlerFunc(s3a.iam.Auth(s3a.GetBucketLifecycleConfigurationHandler, ACTION_READ)).Queries("lifecycle", "")
+		// buckets with query
 
-		// PutBucketLifecycleConfiguration
-		bucket.Methods("PUT").HandlerFunc(s3a.iam.Auth(s3a.PutBucketLifecycleConfigurationHandler, ACTION_WRITE)).Queries("lifecycle", "")
+		// raw buckets
 
-		// DeleteBucketLifecycleConfiguration
-		bucket.Methods("DELETE").HandlerFunc(s3a.iam.Auth(s3a.DeleteBucketLifecycleHandler, ACTION_WRITE)).Queries("lifecycle", "")
-		// ListObjectsV1 (Legacy)
-		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.ListObjectsV1Handler, ACTION_LIST), "LIST"))
+		// PostPolicy
+		bucket.Methods("POST").HeadersRegexp("Content-Type", "multipart/form-data*").HandlerFunc(track(s3a.iam.Auth(s3a.PostPolicyBucketHandler, ACTION_WRITE), "POST"))
+
+		// HeadBucket
+		bucket.Methods("HEAD").HandlerFunc(track(s3a.iam.Auth(s3a.HeadBucketHandler, ACTION_READ), "GET"))
 
 		// PutBucket
 		bucket.Methods("PUT").HandlerFunc(track(s3a.PutBucketHandler, "PUT"))
-
 		// DeleteBucket
 		bucket.Methods("DELETE").HandlerFunc(track(s3a.iam.Auth(s3a.DeleteBucketHandler, ACTION_WRITE), "DELETE"))
+
+		// ListObjectsV1 (Legacy)
+		bucket.Methods("GET").HandlerFunc(track(s3a.iam.Auth(s3a.ListObjectsV1Handler, ACTION_LIST), "LIST"))
+
+		// raw buckets
+
 	}
 
 	// ListBuckets