SpiceDb 1.4.8

SpiceDb

Simple SpiceDb client originally based on code from SpiceDB.Hierarchical.UI - Works with AuthZed https://github.com/MaheshBailwal/SpiceDB.Hierarchical.UI

This API does not directly expose the SpiceDb grpc client but instead wraps it and exposes a few additional helper methods to make development easier.

Available on Nuget at https://www.nuget.org/packages/SpiceDb

Usage

Install

Install the package using NuGet
Install-Package SpiceDb

Example Using UserSecrets

using Microsoft.Extensions.Configuration;
using SpiceDb.Example;
using SpiceDb.Example.MyObjects;
using SpiceDb.Models;

// This is just to keep the server address and token private
var builder = new ConfigurationBuilder()
    .AddUserSecrets(typeof(Secrets).Assembly)
    .AddEnvironmentVariables();
var configurationRoot = builder.Build();

var secrets = configurationRoot.GetSection("AuthZed").Get<Secrets>();

if (secrets is null)
    throw new ArgumentException("Invalid secrets configuration");

// var serverAddress = "https://grpc.authzed.com";
// Create a new client with a prefix of "arch" for all defined objects
var client = new SpiceDbClient(secrets.ServerAddress, secrets.Token, "arch");

// Add relationship where user:bob is a reader of document:firstdoc
// Note that because the schema prefix is set in the client it is not necessary to always prefix every resource definition 
client.AddRelationship("arch/document:firstdoc#reader@arch/user:bob");

// This also works
client.AddRelationship("document:firstdoc#reader@user:kevin");

// Second approach to adding relationships
client.AddRelationship(new Relationship("arch/document:firstdoc", "reader", "arch/user:jacob"));

// This approach uses a little syntactic sugar to define each of the relations
client.AddRelationship(ZedUser.WithId("carmella").CanRead(ZedDocument.WithId("firstdoc")));

// Check to see if user:bob is in fact now a reader of document:firstdoc
var bobCanRead = client.CheckPermission(new Permission("arch/document:firstdoc#reader@arch/user:bob"));

Console.WriteLine($"Can user bob read document:firstdoc? {bobCanRead.HasPermission}");
// true

// This is a similar check but without adding prefixes
var kevinCanRead = client.CheckPermission(new Permission("document:firstdoc#reader@user:bob"));

Console.WriteLine($"Can user kevin read document:firstdoc? {kevinCanRead.HasPermission}");
// true


// Check to see if user:carmella is in fact now a reader of document:firstdoc
var carmellaCanRead = client.CheckPermission(ZedUser.WithId("carmella").CanRead(ZedDocument.WithId("firstdoc")));

Console.WriteLine($"Can user carmella read document:firstdoc? {carmellaCanRead.HasPermission}");
// true

API Coverage

authzed.api.v1 method	Implemented
ReadRelationships	Yes
WriteRelationships	Yes
DeleteRelationships	Yes
CheckPermission	Yes
ExpandPermissionTree	Yes
LookupResources	Yes
LookupSubjects	Yes
ReadSchema	Yes
WriteSchema	Yes, as Import* methods
Watch	Yes

API Methods

SpiceDbClient Class

The SpiceDbClient class provides a client for interacting with Authzed's SpiceDb, offering methods to manipulate permission systems efficiently.

Constructors

SpiceDbClient(string token, string schemaPrefix)

Initializes a new instance of the SpiceDbClient class using the default Authzed server address.

Parameters

• token - Token with admin privileges for manipulating the desired permission system.
• schemaPrefix - Schema prefix used for the permission system.

SpiceDbClient(string serverAddress, string token, string schemaPrefix)

Initializes a new instance of the SpiceDbClient class with the specified server address, token, and schema prefix.

Parameters

• serverAddress - The server address of the Authzed server.
• token - The token with admin privileges for manipulating the desired permission system.
• schemaPrefix - The schema prefix used for the permission system.

Exceptions

• Exception - Thrown when the server address or token is null or empty, or if the schema prefix does not meet the required format.

Methods

ReadRelationshipsAsync

Asynchronously reads a set of relationships matching one or more filters.

Parameters

• resource - The filter to apply to the resource part of the relationships.
• subject (optional) - An optional filter to apply to the subject part of the relationships.
• excludePrefix (optional) - Indicates whether the prefix should be excluded from the response.
• zedToken (optional) - An optional ZedToken for specifying a version of the data to read.
• cacheFreshness (optional) - Specifies the acceptable freshness of the data to be read from the cache.

Returns

• An async enumerable of ReadRelationshipsResponse objects matching the specified filters.

WriteRelationshipsAsync

Atomically writes and/or deletes a set of specified relationships, with optional preconditions.

Parameters

• relationships - A list of relationship updates to apply.
• optionalPreconditions (optional) - An optional list of preconditions that must be satisfied for the operation to commit.

Returns

• A task representing the asynchronous operation, with a ZedToken? indicating the version of the data after the write operation.

DeleteRelationshipsAsync

Atomically bulk deletes all relationships matching the provided filters, with optional preconditions.

Parameters

• resourceFilter - The filter to apply to the resource part of the relationships. The resourceFilter.Type is required; all other fields are optional.
• optionalSubjectFilter (optional) - An optional additional filter for the subject part of the relationships.
• optionalPreconditions (optional) - An optional list of preconditions that must be satisfied for the operation to commit.
• deadline (optional) - An optional deadline for the call. The operation will be cancelled if the deadline is reached.
• cancellationToken (optional) - An optional token for cancelling the call.

Returns

• A task representing the asynchronous operation, with a ZedToken? indicating the version of the data after the delete operation.

CheckPermissionAsync

Checks permissions for a given resource and subject, optionally considering additional context.

Parameters

• permission - The permission relationship to evaluate.
• context (optional) - An optional dictionary providing additional context information for evaluating caveats.
• zedToken (optional) - An optional ZedToken for specifying a version of the data to consider.
• cacheFreshness (optional) - Specifies the acceptable freshness of the data to be considered from the cache.

Returns

• A task representing the asynchronous operation, with a PermissionResponse indicating the result of the permission check.

ExpandPermissionAsync

Expands the permission tree for a resource's permission or relation, revealing the graph structure. This method may require multiple calls to fully unnest a deeply nested graph.

Parameters

• resource - The resource reference for which to expand the permission tree.
• permission - The name of the permission or relation to expand.
• zedToken (optional) - An optional ZedToken for specifying a version of the data to consider.
• cacheFreshness (optional) - Specifies the acceptable freshness of the data to be considered from the cache.

Returns

• A task representing the asynchronous operation, with an ExpandPermissionTreeResponse? indicating the result of the expansion operation.

AddRelationshipsAsync

Adds or updates multiple relationships as a single atomic update.

Parameters

• relationships - List of relationships to add or update.

Returns

• A task representing the asynchronous operation, with a ZedToken? indicating the version of the data after the operation.

AddRelationshipAsync

Adds or updates a single relationship.

Parameters

• relation - The relationship to add or update.

Returns

• A task representing the asynchronous operation, with a ZedToken indicating the version of the data after the operation.

DeleteRelationshipAsync

Removes an existing relationship (if it exists).

Parameters

• relation - The relationship to remove.

Returns

• A task representing the asynchronous operation, with a ZedToken indicating the version of the data after the relationship is removed.

LookupSubjects

Returns all the subjects of a given type that have access, whether via a computed permission or relation membership.

Parameters

• resource - Resource is the resource for which all matching subjects for the permission or relation will be returned.
• permission - Permission is the name of the permission (or relation) for which to find the subjects.
• subjectType - SubjectType is the type of subject object for which the IDs will be returned.
• optionalSubjectRelation (optional) - OptionalSubjectRelation is the optional relation for the subject.
• context (optional) - Context consists of named values that are injected into the caveat evaluation context.
• zedToken (optional) - An optional ZedToken for specifying a version of the data to consider.
• cacheFreshness (optional) - Specifies the acceptable freshness of the data to be considered from the cache.

Returns

• An async enumerable of LookupSubjectsResponse objects representing the subjects with access to the specified resource.

LookupResources

Returns all the resources of a given type that a subject can access, whether via a computed permission or relation membership.

Parameters

• resourceType - The type of resource object for which the IDs will be returned.
• permission - The name of the permission or relation for which the subject must check.
• subject - The subject with access to the resources.
• context (optional) - Dictionary of values that are injected into the caveat evaluation context.
• zedToken (optional) - An optional ZedToken for specifying a version of the data to consider.
• cacheFreshness (optional) - Specifies the acceptable freshness of the data to be considered from the cache.

Returns

• An async enumerable of LookupResourcesResponse objects representing the resources accessible to the specified subject.

Watch

Listens for changes to specified subjects and returns updates as they occur.

Parameters

• optionalSubjectTypes (optional) - A list of subject types to watch for changes.
• zedToken (optional) - An optional ZedToken for specifying a version of the data to watch.
• deadline (optional) - An optional deadline for the call. The operation will be cancelled if the deadline is reached.
• cancellationToken (optional) - An optional token for cancelling the call.

Returns

• An async enumerable of WatchResponse objects representing the updates to the watched subjects.

GetResourcePermissionsAsync

Retrieves the list of permissions for a specified resource, permission, and subject.

Parameters

• resourceType - The type of the resource.
• permission - The name of the permission.
• subject - The subject for which permissions are being checked.
• zedToken (optional) - An optional ZedToken for specifying a version of the data to consider.
• cacheFreshness (optional) - Specifies the acceptable freshness of the data to be considered from the cache.

Returns

• A task representing the asynchronous operation, with a list of string indicating the permissions for the specified resource.

ReadSchema

Reads the current schema in use by the SpiceDB.

Returns

• A string representing the current schema as defined in the SpiceDB.

ImportSchemaFromFileAsync

Imports a schema into SpiceDB from a specified file.

Parameters

• filePath - The path to the file containing the schema to import.

Returns

• A task representing the asynchronous operation of importing the schema.

ImportSchemaFromStringAsync

Imports a schema into SpiceDB from a provided string.

Parameters

• schema - The schema to import, provided as a string.

Returns

• A task representing the asynchronous operation of importing the schema.

ImportRelationshipsFromFileAsync

Imports relationships into SpiceDB from a specified file.

Parameters

• filePath - The path to the file containing the relationships to import.

Returns

• A task representing the asynchronous operation, with a ZedToken? indicating the version of the data after the import operation.

ImportRelationshipsAsync

Imports relationships into SpiceDB from a provided string.

Parameters

• content - The relationships to import, provided as a string.

Returns

• A task representing the asynchronous operation, with a ZedToken? indicating the version of the data after the import operation.

CheckBulkPermissionAsync (IEnumerable<string> permissions)

Checks multiple permissions in bulk for a specified list of permission identifiers.

Parameters

• permissions - An enumerable of permission identifiers to check.

Returns

• A task representing the asynchronous operation, with a CheckBulkPermissionsResponse? indicating the results of the bulk permission checks.

CheckBulkPermissionAsync (IEnumerable<Permission> permissions)

Checks multiple permissions in bulk for a specified list of Permission objects.

Parameters

• permissions - An enumerable of Permission objects to check.

Returns

• A task representing the asynchronous operation, with a CheckBulkPermissionsResponse? indicating the results of the bulk permission checks.

CheckBulkPermissionAsync (IEnumerable<CheckBulkPermissionsRequestItem> items)

Checks multiple permissions in bulk for a specified list of CheckBulkPermissionsRequestItem objects.

Parameters

• items - An enumerable of CheckBulkPermissionsRequestItem objects to check.

Returns

• A task representing the asynchronous operation, with a CheckBulkPermissionsResponse? indicating the results of the bulk permission checks.