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package servers |
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import ( |
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"context" |
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"log/slog" |
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"errors" |
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"sync" |
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otelCodes "go.opentelemetry.io/otel/codes" |
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"google.golang.org/grpc/status" |
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"github.com/Permify/permify/internal" |
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"github.com/Permify/permify/internal/invoke" |
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v1 "github.com/Permify/permify/pkg/pb/base/v1" |
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) |
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// PermissionServer - Structure for Permission Server |
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type PermissionServer struct { |
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v1.UnimplementedPermissionServer |
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invoker invoke.Invoker |
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} |
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// NewPermissionServer - Creates new Permission Server |
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func NewPermissionServer(i invoke.Invoker) *PermissionServer { |
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return &PermissionServer{ |
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invoker: i, |
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} |
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} |
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// Check - Performs Authorization Check |
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func (r *PermissionServer) Check(ctx context.Context, request *v1.PermissionCheckRequest) (*v1.PermissionCheckResponse, error) { |
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ctx, span := internal.Tracer.Start(ctx, "permissions.check") |
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defer span.End() |
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v := request.Validate() |
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if v != nil { |
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return nil, status.Error(GetStatus(v), v.Error()) // Return validation error |
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} |
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response, err := r.invoker.Check(ctx, request) |
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if err != nil { |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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slog.ErrorContext(ctx, err.Error()) |
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return nil, status.Error(GetStatus(err), err.Error()) |
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} |
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return response, nil |
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} |
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// BulkCheck - Performs multiple authorization checks in a single request |
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func (r *PermissionServer) BulkCheck(ctx context.Context, request *v1.PermissionBulkCheckRequest) (*v1.PermissionBulkCheckResponse, error) { |
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// emptyResp is a default, empty response that we will return in case of an error or when the context is cancelled. |
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emptyResp := &v1.PermissionBulkCheckResponse{ |
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Results: make([]*v1.PermissionCheckResponse, 0), |
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} |
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ctx, span := internal.Tracer.Start(ctx, "permissions.bulk-check") |
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defer span.End() |
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// Validate tenant_id |
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if request.GetTenantId() == "" { |
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err := status.Error(GetStatus(nil), "tenant_id is required") |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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return nil, err |
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} |
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checkItems := request.GetItems() |
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// Validate number of requests |
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if len(checkItems) == 0 { |
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err := status.Error(GetStatus(nil), "at least one item is required") |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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return nil, err |
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} |
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if len(checkItems) > 100 { |
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err := status.Error(GetStatus(nil), "maximum 100 items allowed") |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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return nil, err |
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} |
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// Create a buffered channel for BulkPermissionCheckResponses. |
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// The buffer size is equal to the number of references in the entity. |
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type ResultChannel struct {int; *v1.PermissionCheckResponse} |
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resultChannel := make(chan ResultChannel, len(checkItems)) |
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// The WaitGroup and Mutex are used for synchronization. |
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var wg sync.WaitGroup |
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var mutex sync.Mutex |
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// Process each check request |
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for i, checkRequestItem := range checkItems { |
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wg.Add(1) |
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go func(checkRequestItem *v1.PermissionBulkCheckRequestItem) { |
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defer wg.Done() |
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// Validate individual request |
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v := checkRequestItem.Validate() |
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if v != nil { |
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// Return error response for this check |
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resultChannel <- ResultChannel{ |
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i, |
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&v1.PermissionCheckResponse{ |
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Can: v1.CheckResult_CHECK_RESULT_DENIED, |
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Metadata: &v1.PermissionCheckResponseMetadata{ |
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CheckCount: 0, |
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}, |
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}, |
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} |
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return |
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} |
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// Perform the check using existing Check function |
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checkRequest := &v1.PermissionCheckRequest{ |
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TenantId: request.GetTenantId(), |
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Subject: checkRequestItem.GetSubject(), |
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Entity: checkRequestItem.GetEntity(), |
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Permission: checkRequestItem.GetPermission(), |
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Metadata: request.GetMetadata(), |
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Context: request.GetContext(), |
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Arguments: request.GetArguments(), |
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} |
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response, err := r.invoker.Check(ctx, checkRequest) |
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if err != nil { |
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// Log error but don't fail the entire bulk operation |
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slog.ErrorContext(ctx, "check failed in bulk operation", "error", err.Error(), "index", i) |
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resultChannel <- ResultChannel{ |
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i, |
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&v1.PermissionCheckResponse{ |
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Can: v1.CheckResult_CHECK_RESULT_DENIED, |
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Metadata: &v1.PermissionCheckResponseMetadata{ |
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CheckCount: 0, |
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}, |
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}, |
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} |
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return |
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} |
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resultChannel <- ResultChannel{i, response} |
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}(checkRequestItem) |
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} |
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// Once the function returns, we wait for all goroutines to finish, then close the resultChannel. |
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defer func() { |
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wg.Wait() |
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close(resultChannel) |
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}() |
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// We read the responses from the resultChannel. |
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// We expect as many responses as there are references in the entity. |
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results := make([]*v1.PermissionCheckResponse, len(request.GetItems())) |
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for range checkItems { |
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select { |
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// If we receive a response from the resultChannel, we check for errors. |
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case response := <-resultChannel: |
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// If there's no error, we add the result to our response's Results map. |
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// We use a mutex to safely update the map since multiple goroutines may be writing to it concurrently. |
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mutex.Lock() |
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results[response.int] = response.PermissionCheckResponse |
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mutex.Unlock() |
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// If the context is done (i.e., canceled or deadline exceeded), we return an empty response and an error. |
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case <-ctx.Done(): |
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return emptyResp, errors.New(v1.ErrorCode_ERROR_CODE_CANCELLED.String()) |
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} |
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} |
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return &v1.PermissionBulkCheckResponse{ |
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Results: results, |
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}, nil |
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} |
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// Expand - Get schema actions in a tree structure |
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func (r *PermissionServer) Expand(ctx context.Context, request *v1.PermissionExpandRequest) (*v1.PermissionExpandResponse, error) { |
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ctx, span := internal.Tracer.Start(ctx, "permissions.expand") |
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defer span.End() |
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v := request.Validate() |
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if v != nil { |
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return nil, status.Error(GetStatus(v), v.Error()) // Return validation error |
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} |
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response, err := r.invoker.Expand(ctx, request) |
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if err != nil { |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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slog.ErrorContext(ctx, err.Error()) |
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return nil, status.Error(GetStatus(err), err.Error()) |
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} |
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return response, nil |
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} |
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// LookupEntity - |
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func (r *PermissionServer) LookupEntity(ctx context.Context, request *v1.PermissionLookupEntityRequest) (*v1.PermissionLookupEntityResponse, error) { |
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ctx, span := internal.Tracer.Start(ctx, "permissions.lookup-entity") |
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defer span.End() |
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v := request.Validate() |
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if v != nil { |
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return nil, status.Error(GetStatus(v), v.Error()) // Return validation error |
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} |
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response, err := r.invoker.LookupEntity(ctx, request) |
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if err != nil { |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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slog.ErrorContext(ctx, err.Error()) |
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return nil, status.Error(GetStatus(err), err.Error()) |
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} |
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return response, nil |
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} |
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// LookupEntityStream - |
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func (r *PermissionServer) LookupEntityStream(request *v1.PermissionLookupEntityRequest, server v1.Permission_LookupEntityStreamServer) error { |
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ctx, span := internal.Tracer.Start(server.Context(), "permissions.lookup-entity-stream") |
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defer span.End() |
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v := request.Validate() |
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if v != nil { |
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return v |
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} |
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err := r.invoker.LookupEntityStream(ctx, request, server) |
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if err != nil { |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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slog.ErrorContext(ctx, err.Error()) |
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return status.Error(GetStatus(err), err.Error()) |
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} |
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return nil |
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} |
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// LookupSubject - |
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func (r *PermissionServer) LookupSubject(ctx context.Context, request *v1.PermissionLookupSubjectRequest) (*v1.PermissionLookupSubjectResponse, error) { |
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ctx, span := internal.Tracer.Start(ctx, "permissions.lookup-subject") |
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defer span.End() |
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v := request.Validate() |
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if v != nil { |
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return nil, status.Error(GetStatus(v), v.Error()) // Return validation error |
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} |
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response, err := r.invoker.LookupSubject(ctx, request) |
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if err != nil { |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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slog.ErrorContext(ctx, err.Error()) |
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return nil, status.Error(GetStatus(err), err.Error()) |
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} |
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return response, nil |
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} |
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// SubjectPermission - |
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func (r *PermissionServer) SubjectPermission(ctx context.Context, request *v1.PermissionSubjectPermissionRequest) (*v1.PermissionSubjectPermissionResponse, error) { |
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ctx, span := internal.Tracer.Start(ctx, "permissions.subject-permission") |
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defer span.End() |
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v := request.Validate() |
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if v != nil { |
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return nil, status.Error(GetStatus(v), v.Error()) // Return validation error |
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} |
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response, err := r.invoker.SubjectPermission(ctx, request) |
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if err != nil { |
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span.RecordError(err) |
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span.SetStatus(otelCodes.Error, err.Error()) |
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slog.ErrorContext(ctx, err.Error()) |
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return nil, status.Error(GetStatus(err), err.Error()) |
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} |
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return response, nil |
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} |
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|
Permify /
permify
