s3files

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 Go to latest Published: Oct 19, 2026 License: MIT Imports: 24 Imported by: 0

README

S3 Files

Parity grade: B · SDK aws-sdk-go-v2/service/s3files@v1.8.1 · last audited 2026-10-18 (d52fe4ac6)

Coverage

Metric Value
PARITY entries audited 21 (21 ok)
Known gaps 9
Structural gaps (can't be emulated) 1
Deferred items 0
Resource leaks clean
Known gaps
  • CreateMountTarget: when SecurityGroups is omitted the VPC default security group is not looked up, so none is reported; supplied group IDs are shape-checked only, not resolved against EC2 or checked for VPC membership.
  • CreateMountTarget: IPv4 allocation avoids only this backend's mount targets, not addresses EC2 holds; IPv6 is never allocated; the network interface ID is minted here and no ENI exists in EC2.
  • CreateFileSystem: RoleArn is shape-checked, not looked up in IAM; KmsKeyId is not looked up in KMS; AcceptBucketWarning is accepted but no bucket warnings exist.
  • GetSynchronizationConfiguration returns ResourceNotFoundException until a configuration is put; the real service may seed a default configuration at creation, which the SDK docs do not state.
  • DeleteFileSystem: ForceDelete is accepted but there is no file data plane, so no export is ever pending and the flag changes nothing.
  • ServiceQuotaExceededException, ThrottlingException and InternalServerException are never returned: the S3 Files quotas are not published in the SDK, so no limit is enforced.
  • Error HTTP statuses (400/404/409) are inferred; the SDK dispatches on the X-Amzn-Errortype header and does not pin statuses. ConflictException carries resourceId and resourceType.
  • Access point and file system ARN resource paths (access-point/, file-system/) are assumed from sibling services; the SDK documents ARNs only as opaque strings.
  • The creating/deleting dwell is zero by default and is not exposed as a CLI lifecycle setting; tests drive it with SetLifecycleDelay.
Structural gaps

These do not block an A grade — no implementation could produce real data here because the underlying data source cannot exist in an emulator.

  • No NFS/file data plane: files are not served from or exported to the S3 bucket, and no import or expiration rule is ever evaluated.

More

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrNotFound is returned when a file system, mount target, access point or policy does not exist.
	ErrNotFound = awserr.New("ResourceNotFoundException", awserr.ErrNotFound)
	// ErrConflict is returned when the request conflicts with the resource's current state.
	ErrConflict = awserr.New("ConflictException", awserr.ErrConflict)
	// ErrValidation is returned for malformed or out-of-range input.
	ErrValidation = awserr.New("ValidationException", awserr.ErrInvalidParameter)
)
View Source 
var ErrNilAppContext = errors.New("appContext must not be nil")

ErrNilAppContext is returned when Init is called with a nil application context.

Functions

This section is empty.

Types

type AccessPoint 

type AccessPoint struct {
	Tags          map[string]string `json:"tags,omitempty"`
	PosixUser     *PosixUser        `json:"posixUser,omitempty"`
	RootDirectory *RootDirectory    `json:"rootDirectory,omitempty"`
	ID            string            `json:"id"`
	ARN           string            `json:"arn"`
	FileSystemID  string            `json:"fileSystemId"`
	ClientToken   string            `json:"clientToken,omitempty"`
	OwnerID       string            `json:"ownerId"`
	Region        string            `json:"region"`
	Lifecycle
}

AccessPoint is an application-specific entry point into a file system.

type BucketResolver 

type BucketResolver interface {
	BucketExists(ctx context.Context, bucket string) bool
}

BucketResolver checks that an S3 bucket exists in the emulated S3 service.

type CreateAccessPointInput 

type CreateAccessPointInput struct {
	Tags          map[string]string
	PosixUser     *PosixUser
	RootDirectory *RootDirectory
	FileSystemID  string
	ClientToken   string
}

CreateAccessPointInput is the backend form of CreateAccessPoint.

type CreateFileSystemInput 

type CreateFileSystemInput struct {
	Tags        map[string]string
	Bucket      string
	RoleARN     string
	ClientToken string
	KMSKeyID    string
	Prefix      string
}

CreateFileSystemInput is the backend form of CreateFileSystem.

type CreateMountTargetInput 

type CreateMountTargetInput struct {
	FileSystemID   string
	SubnetID       string
	IPAddressType  string
	IPv4Address    string
	IPv6Address    string
	SecurityGroups []string
}

CreateMountTargetInput is the backend form of CreateMountTarget.

type CreationPermissions 

type CreationPermissions struct {
	OwnerUID    *int64  `json:"ownerUid"`
	OwnerGID    *int64  `json:"ownerGid"`
	Permissions *string `json:"permissions"`
}

CreationPermissions are applied to a newly created root directory.

type ExpirationDataRule 

type ExpirationDataRule struct {
	DaysAfterLastAccess *int32 `json:"daysAfterLastAccess"`
}

ExpirationDataRule controls when cached data expires from a file system.

type FileSystem 

type FileSystem struct {
	Tags        map[string]string  `json:"tags,omitempty"`
	Sync        *SyncConfiguration `json:"sync,omitempty"`
	ID          string             `json:"id"`
	ARN         string             `json:"arn"`
	Bucket      string             `json:"bucket"`
	Prefix      string             `json:"prefix,omitempty"`
	RoleARN     string             `json:"roleArn"`
	KMSKeyID    string             `json:"kmsKeyId,omitempty"`
	ClientToken string             `json:"clientToken,omitempty"`
	OwnerID     string             `json:"ownerId"`
	Region      string             `json:"region"`
	Policy      string             `json:"policy,omitempty"`
	Lifecycle
}

FileSystem is an S3 file system scoped to a bucket or prefix.

type Handler 

type Handler struct {
	Backend *InMemoryBackend
	// contains filtered or unexported fields
}

Handler is the Echo handler for the S3 Files REST-JSON API.

func NewHandler 

func NewHandler(backend *InMemoryBackend) *Handler

NewHandler creates a handler over backend.

func (*Handler) ChaosOperations 

func (h *Handler) ChaosOperations() []string

ChaosOperations lists the fault-injectable operations.

func (*Handler) ChaosRegions 

func (h *Handler) ChaosRegions() []string

ChaosRegions lists the regions served.

func (*Handler) ChaosServiceName 

func (h *Handler) ChaosServiceName() string

ChaosServiceName returns the lowercase service name for fault rules.

func (*Handler) ExtractOperation 

func (h *Handler) ExtractOperation(c *echo.Context) string

ExtractOperation returns the operation name for the request.

func (*Handler) ExtractResource 

func (h *Handler) ExtractResource(c *echo.Context) string

ExtractResource returns the primary resource identifier for the request.

func (*Handler) GetSupportedOperations 

func (h *Handler) GetSupportedOperations() []string

GetSupportedOperations lists the implemented operations.

func (*Handler) Handler 

func (h *Handler) Handler() echo.HandlerFunc

Handler returns the Echo handler function.

func (*Handler) MatchPriority 

func (h *Handler) MatchPriority() int

MatchPriority returns the routing priority.

func (*Handler) Name 

func (h *Handler) Name() string

Name returns the service name.

func (*Handler) Reset 

func (h *Handler) Reset()

Reset clears all backend state.

func (*Handler) Restore 

func (h *Handler) Restore(ctx context.Context, data []byte) error

Restore implements persistence.Persistable.

func (*Handler) RouteMatcher 

func (h *Handler) RouteMatcher() service.Matcher

RouteMatcher matches requests signed for s3files. Its paths (/file-systems, /access-points, ...) carry no service prefix, so the SigV4 signing name or the s3files endpoint host is the discriminator.

func (*Handler) Snapshot 

func (h *Handler) Snapshot(ctx context.Context) []byte

Snapshot implements persistence.Persistable.

type ImportDataRule 

type ImportDataRule struct {
	Prefix       *string `json:"prefix"`
	SizeLessThan *int64  `json:"sizeLessThan"`
	Trigger      string  `json:"trigger"`
}

ImportDataRule controls how S3 data is imported into a file system.

type InMemoryBackend 

type InMemoryBackend struct {
	// contains filtered or unexported fields
}

InMemoryBackend is the in-memory S3 Files backend. One coarse lock guards all tables.

func NewInMemoryBackend 

func NewInMemoryBackend(accountID, region string) *InMemoryBackend

NewInMemoryBackend creates an empty backend.

func (*InMemoryBackend) CreateAccessPoint 

func (b *InMemoryBackend) CreateAccessPoint(
	ctx context.Context,
	in CreateAccessPointInput,
) (*AccessPoint, bool, error)

CreateAccessPoint creates an access point; created is false for an idempotent replay.

func (*InMemoryBackend) CreateFileSystem 

func (b *InMemoryBackend) CreateFileSystem(
	ctx context.Context,
	in CreateFileSystemInput,
) (*FileSystem, bool, error)

CreateFileSystem creates a file system on an S3 bucket; created is false for an idempotent replay.

func (*InMemoryBackend) CreateMountTarget 

func (b *InMemoryBackend) CreateMountTarget(ctx context.Context, in CreateMountTargetInput) (*MountTarget, error)

CreateMountTarget creates a mount target for an available file system.

func (*InMemoryBackend) DeleteAccessPoint 

func (b *InMemoryBackend) DeleteAccessPoint(ctx context.Context, ref string) error

DeleteAccessPoint deletes an access point.

func (*InMemoryBackend) DeleteFileSystem 

func (b *InMemoryBackend) DeleteFileSystem(ctx context.Context, ref string, _ bool) error

DeleteFileSystem deletes a file system that has no mount targets or access points.

func (*InMemoryBackend) DeleteFileSystemPolicy 

func (b *InMemoryBackend) DeleteFileSystemPolicy(ctx context.Context, ref string) error

DeleteFileSystemPolicy removes the resource policy of a file system.

func (*InMemoryBackend) DeleteMountTarget 

func (b *InMemoryBackend) DeleteMountTarget(ctx context.Context, id string) error

DeleteMountTarget deletes a mount target.

func (*InMemoryBackend) GetAccessPoint 

func (b *InMemoryBackend) GetAccessPoint(ctx context.Context, ref string) (*AccessPoint, error)

GetAccessPoint returns an access point by ID or ARN.

func (*InMemoryBackend) GetFileSystem 

func (b *InMemoryBackend) GetFileSystem(ctx context.Context, ref string) (*FileSystem, error)

GetFileSystem returns a file system by ID or ARN.

func (*InMemoryBackend) GetFileSystemPolicy 

func (b *InMemoryBackend) GetFileSystemPolicy(ctx context.Context, ref string) (string, string, error)

GetFileSystemPolicy returns the resource policy and the file system's ID.

func (*InMemoryBackend) GetMountTarget 

func (b *InMemoryBackend) GetMountTarget(ctx context.Context, id string) (*MountTarget, error)

GetMountTarget returns a mount target by ID.

func (*InMemoryBackend) GetSynchronizationConfiguration 

func (b *InMemoryBackend) GetSynchronizationConfiguration(ctx context.Context, ref string) (*SyncConfiguration, error)

GetSynchronizationConfiguration returns the sync configuration of a file system.

func (*InMemoryBackend) ListAccessPoints 

func (b *InMemoryBackend) ListAccessPoints(
	ctx context.Context,
	fileSystemRef string,
	maxResults int,
	token string,
) (page.Page[*AccessPoint], error)

ListAccessPoints lists the access points of one file system.

func (*InMemoryBackend) ListFileSystems 

func (b *InMemoryBackend) ListFileSystems(
	ctx context.Context,
	bucket string,
	maxResults int,
	token string,
) (page.Page[*FileSystem], error)

ListFileSystems lists file systems, optionally restricted to one bucket ARN.

func (*InMemoryBackend) ListMountTargets 

func (b *InMemoryBackend) ListMountTargets(
	ctx context.Context,
	fileSystemRef, accessPointRef string,
	maxResults int,
	token string,
) (page.Page[*MountTarget], error)

ListMountTargets lists mount targets, optionally filtered by file system or access point.

func (*InMemoryBackend) ListTagsForResource 

func (b *InMemoryBackend) ListTagsForResource(
	ctx context.Context,
	ref string,
	maxResults int,
	token string,
) (page.Page[KV], error)

ListTagsForResource lists a resource's tags sorted by key.

func (*InMemoryBackend) PutFileSystemPolicy 

func (b *InMemoryBackend) PutFileSystemPolicy(ctx context.Context, ref, policy string) error

PutFileSystemPolicy sets the resource policy of a file system.

func (*InMemoryBackend) PutSynchronizationConfiguration 

func (b *InMemoryBackend) PutSynchronizationConfiguration(ctx context.Context, ref string, in PutSyncInput) error

PutSynchronizationConfiguration creates or replaces the sync configuration, with optimistic versioning.

func (*InMemoryBackend) Region 

func (b *InMemoryBackend) Region() string

Region returns the default region.

func (*InMemoryBackend) Reset 

func (b *InMemoryBackend) Reset()

Reset clears all state.

func (*InMemoryBackend) Restore 

func (b *InMemoryBackend) Restore(ctx context.Context, data []byte) error

Restore loads state produced by Snapshot.

func (*InMemoryBackend) SetBucketResolver 

func (b *InMemoryBackend) SetBucketResolver(r BucketResolver)

SetBucketResolver wires S3 bucket validation; nil leaves buckets unvalidated.

func (*InMemoryBackend) SetClock 

func (b *InMemoryBackend) SetClock(now func() time.Time)

SetClock replaces the time source (tests).

func (*InMemoryBackend) SetLifecycleDelay 

func (b *InMemoryBackend) SetLifecycleDelay(d time.Duration)

SetLifecycleDelay sets how long resources stay creating/deleting; zero is instant.

func (*InMemoryBackend) SetSubnetResolver 

func (b *InMemoryBackend) SetSubnetResolver(r SubnetResolver)

SetSubnetResolver wires EC2 subnet validation; nil leaves subnets unvalidated.

func (*InMemoryBackend) Snapshot 

func (b *InMemoryBackend) Snapshot(ctx context.Context) []byte

Snapshot serialises the backend state to JSON.

func (*InMemoryBackend) TagResource 

func (b *InMemoryBackend) TagResource(ctx context.Context, ref string, add map[string]string) error

TagResource adds or overwrites tags on a file system or access point.

func (*InMemoryBackend) UntagResource 

func (b *InMemoryBackend) UntagResource(ctx context.Context, ref string, keys []string) error

UntagResource removes tags by key; absent keys are ignored.

func (*InMemoryBackend) UpdateMountTarget 

func (b *InMemoryBackend) UpdateMountTarget(ctx context.Context, id string, sgs []string) (*MountTarget, error)

UpdateMountTarget replaces the mount target's security groups.

type KV 

type KV struct{ Key, Value string }

KV is a tag key/value pair.

type Lifecycle 

type Lifecycle struct {
	CreatedAt         time.Time  `json:"createdAt"`
	DeleteRequestedAt *time.Time `json:"deleteRequestedAt,omitempty"`
	Status            string     `json:"status"`
	StatusMessage     string     `json:"statusMessage,omitempty"`
}

Lifecycle is the state shared by every S3 Files resource.

type MountTarget 

type MountTarget struct {
	Lifecycle
	IPv6Address        string   `json:"ipv6Address,omitempty"`
	SubnetID           string   `json:"subnetId"`
	VPCID              string   `json:"vpcId,omitempty"`
	AvailabilityZoneID string   `json:"availabilityZoneId,omitempty"`
	IPv4Address        string   `json:"ipv4Address,omitempty"`
	ID                 string   `json:"id"`
	IPAddressType      string   `json:"ipAddressType"`
	NetworkInterfaceID string   `json:"networkInterfaceId"`
	OwnerID            string   `json:"ownerId"`
	Region             string   `json:"region"`
	FileSystemID       string   `json:"fileSystemId"`
	SecurityGroups     []string `json:"securityGroups,omitempty"`
}

MountTarget is a network endpoint for mounting a file system.

type PosixUser 

type PosixUser struct {
	UID           *int64  `json:"uid"`
	GID           *int64  `json:"gid"`
	SecondaryGIDs []int64 `json:"secondaryGids,omitempty"`
}

PosixUser is the POSIX identity enforced through an access point.

type Provider 

type Provider struct{}

Provider implements service.Provider for Amazon S3 Files.

func (*Provider) Init 

func (p *Provider) Init(ctx *service.AppContext) (service.Registerable, error)

Init creates the backend and handler.

func (*Provider) Name 

func (p *Provider) Name() string

Name returns the provider name.

type PutSyncInput 

type PutSyncInput struct {
	LatestVersion *int32
	ImportRules   []ImportDataRule
	ExpireRules   []ExpirationDataRule
}

PutSyncInput is the backend form of PutSynchronizationConfiguration.

type RootDirectory 

type RootDirectory struct {
	CreationPermissions *CreationPermissions `json:"creationPermissions,omitempty"`
	Path                *string              `json:"path,omitempty"`
}

RootDirectory is an access point's root directory.

type SubnetInfo 

type SubnetInfo struct {
	VPCID              string
	AvailabilityZoneID string
	CIDR               string
}

SubnetInfo is the placement of an EC2 subnet.

type SubnetResolver 

type SubnetResolver interface {
	Subnet(id string) (SubnetInfo, bool)
}

SubnetResolver looks up EC2 subnets.

type SyncConfiguration 

type SyncConfiguration struct {
	ImportDataRules     []ImportDataRule     `json:"importDataRules"`
	ExpirationDataRules []ExpirationDataRule `json:"expirationDataRules"`
	Version             int32                `json:"version"`
}

SyncConfiguration is a file system's synchronization configuration.

Source Files

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