[chore] local instance count query caching, improved status context endpoint logging, don't log ErrHideStatus when timelining (#3330)

* ensure that errors checking status visibility / converting aren't dropped

* add some more context to error messages

* include calling function name in log entries

* don't error on timelining hidden status

* further code to ignore statusfilter.ErrHideStatus type errors

* remove unused error type

* add local instance status / domain / user counts

* add checks for localhost

* rename from InstanceCounts to LocalInstance

* improved code comment

internal/cache/db.go

@@ -18,6 +18,8 @@
 package cache
 
 import (
+	"sync/atomic"
+
 	"codeberg.org/gruf/go-structr"
 	"github.com/superseriousbusiness/gotosocial/internal/cache/domain"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
@@ -136,6 +138,14 @@ type DBCaches struct {
 	// Instance provides access to the gtsmodel Instance database cache.
 	Instance StructCache[*gtsmodel.Instance]
 
+	// LocalInstance provides caching for
+	// simple + common local instance queries.
+	LocalInstance struct {
+		Domains  atomic.Pointer[int]
+		Statuses atomic.Pointer[int]
+		Users    atomic.Pointer[int]
+	}
+
 	// InteractionRequest provides access to the gtsmodel InteractionRequest database cache.
 	InteractionRequest StructCache[*gtsmodel.InteractionRequest]
 
@@ -852,6 +862,7 @@ func (c *Caches) initInstance() {
 		MaxSize:    cap,
 		IgnoreErr:  ignoreErrors,
 		Copy:       copyF,
+		Invalidate: c.OnInvalidateInstance,
 	})
 }
 

internal/cache/invalidate.go

@@ -19,6 +19,7 @@ package cache
 
 import (
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // Below are cache invalidation hooks between other caches,
@@ -178,6 +179,11 @@ func (c *Caches) OnInvalidateFollowRequest(followReq *gtsmodel.FollowRequest) {
 	)
 }
 
+func (c *Caches) OnInvalidateInstance(instance *gtsmodel.Instance) {
+	// Invalidate the local domains count.
+	c.DB.LocalInstance.Domains.Store(nil)
+}
+
 func (c *Caches) OnInvalidateList(list *gtsmodel.List) {
 	// Invalidate list IDs cache.
 	c.DB.ListIDs.Invalidate(
@@ -255,6 +261,11 @@ func (c *Caches) OnInvalidateStatus(status *gtsmodel.Status) {
 		// Invalidate cache of attached poll ID.
 		c.DB.Poll.Invalidate("ID", status.PollID)
 	}
+
+	if util.PtrOrZero(status.Local) {
+		// Invalidate the local statuses count.
+		c.DB.LocalInstance.Statuses.Store(nil)
+	}
 }
 
 func (c *Caches) OnInvalidateStatusBookmark(bookmark *gtsmodel.StatusBookmark) {
@@ -271,6 +282,9 @@ func (c *Caches) OnInvalidateUser(user *gtsmodel.User) {
 	// Invalidate local account ID cached visibility.
 	c.Visibility.Invalidate("ItemID", user.AccountID)
 	c.Visibility.Invalidate("RequesterID", user.AccountID)
+
+	// Invalidate the local users count.
+	c.DB.LocalInstance.Users.Store(nil)
 }
 
 func (c *Caches) OnInvalidateUserMute(mute *gtsmodel.UserMute) {

internal/db/bundb/instance.go

@@ -39,6 +39,15 @@ type instanceDB struct {
 }
 
 func (i *instanceDB) CountInstanceUsers(ctx context.Context, domain string) (int, error) {
+	localhost := (domain == config.GetHost() || domain == config.GetAccountDomain())
+
+	if localhost {
+		// Check for a cached instance user count, if so return this.
+		if n := i.state.Caches.DB.LocalInstance.Users.Load(); n != nil {
+			return *n, nil
+		}
+	}
+
 	q := i.db.
 		NewSelect().
 		TableExpr("? AS ?", bun.Ident("accounts"), bun.Ident("account")).
@@ -46,7 +55,7 @@ func (i *instanceDB) CountInstanceUsers(ctx context.Context, domain string) (int
 		Where("? != ?", bun.Ident("account.username"), domain).
 		Where("? IS NULL", bun.Ident("account.suspended_at"))
 
-	if domain == config.GetHost() || domain == config.GetAccountDomain() {
+	if localhost {
 		// If the domain is *this* domain, just
 		// count where the domain field is null.
 		q = q.Where("? IS NULL", bun.Ident("account.domain"))
@@ -58,15 +67,30 @@ func (i *instanceDB) CountInstanceUsers(ctx context.Context, domain string) (int
 	if err != nil {
 		return 0, err
 	}
+
+	if localhost {
+		// Update cached instance users account value.
+		i.state.Caches.DB.LocalInstance.Users.Store(&count)
+	}
+
 	return count, nil
 }
 
 func (i *instanceDB) CountInstanceStatuses(ctx context.Context, domain string) (int, error) {
+	localhost := (domain == config.GetHost() || domain == config.GetAccountDomain())
+
+	if localhost {
+		// Check for a cached instance statuses count, if so return this.
+		if n := i.state.Caches.DB.LocalInstance.Statuses.Load(); n != nil {
+			return *n, nil
+		}
+	}
+
 	q := i.db.
 		NewSelect().
 		TableExpr("? AS ?", bun.Ident("statuses"), bun.Ident("status"))
 
-	if domain == config.GetHost() || domain == config.GetAccountDomain() {
+	if localhost {
 		// if the domain is *this* domain, just count where local is true
 		q = q.Where("? = ?", bun.Ident("status.local"), true)
 	} else {
@@ -83,15 +107,30 @@ func (i *instanceDB) CountInstanceStatuses(ctx context.Context, domain string) (
 	if err != nil {
 		return 0, err
 	}
+
+	if localhost {
+		// Update cached instance statuses account value.
+		i.state.Caches.DB.LocalInstance.Statuses.Store(&count)
+	}
+
 	return count, nil
 }
 
 func (i *instanceDB) CountInstanceDomains(ctx context.Context, domain string) (int, error) {
+	localhost := (domain == config.GetHost() || domain == config.GetAccountDomain())
+
+	if localhost {
+		// Check for a cached instance domains count, if so return this.
+		if n := i.state.Caches.DB.LocalInstance.Domains.Load(); n != nil {
+			return *n, nil
+		}
+	}
+
 	q := i.db.
 		NewSelect().
 		TableExpr("? AS ?", bun.Ident("instances"), bun.Ident("instance"))
 
-	if domain == config.GetHost() {
+	if localhost {
 		// if the domain is *this* domain, just count other instances it knows about
 		// exclude domains that are blocked
 		q = q.
@@ -106,6 +145,12 @@ func (i *instanceDB) CountInstanceDomains(ctx context.Context, domain string) (i
 	if err != nil {
 		return 0, err
 	}
+
+	if localhost {
+		// Update cached instance domains account value.
+		i.state.Caches.DB.LocalInstance.Domains.Store(&count)
+	}
+
 	return count, nil
 }
 
@@ -215,13 +260,15 @@ func (i *instanceDB) PopulateInstance(ctx context.Context, instance *gtsmodel.In
 }
 
 func (i *instanceDB) PutInstance(ctx context.Context, instance *gtsmodel.Instance) error {
-	// Normalize the domain as punycode
 	var err error
+
+	// Normalize the domain as punycode
 	instance.Domain, err = util.Punify(instance.Domain)
 	if err != nil {
 		return gtserror.Newf("error punifying domain %s: %w", instance.Domain, err)
 	}
 
+	// Store the new instance model in database, invalidating cache.
 	return i.state.Caches.DB.Instance.Store(instance, func() error {
 		_, err := i.db.NewInsert().Model(instance).Exec(ctx)
 		return err

internal/filter/visibility/status.go

@@ -104,18 +104,20 @@ func (f *Filter) isStatusVisible(
 		return false, nil
 	}
 
-	if util.PtrOrValue(status.PendingApproval, false) {
+	if util.PtrOrZero(status.PendingApproval) {
 		// Use a different visibility heuristic
 		// for pending approval statuses.
-		return f.isPendingStatusVisible(ctx,
+		return isPendingStatusVisible(
 			requester, status,
-		)
+		), nil
 	}
 
 	if requester == nil {
 		// Use a different visibility
 		// heuristic for unauthed requests.
-		return f.isStatusVisibleUnauthed(ctx, status)
+		return f.isStatusVisibleUnauthed(
+			ctx, status,
+		)
 	}
 
 	/*
@@ -210,45 +212,42 @@ func (f *Filter) isStatusVisible(
 	}
 }
 
-func (f *Filter) isPendingStatusVisible(
+// isPendingStatusVisible returns whether a status pending approval is visible to requester.
-	_ context.Context,
+func isPendingStatusVisible(requester *gtsmodel.Account, status *gtsmodel.Status) bool {
-	requester *gtsmodel.Account,
-	status *gtsmodel.Status,
-) (bool, error) {
 	if requester == nil {
 		// Any old tom, dick, and harry can't
 		// see pending-approval statuses,
 		// no matter what their visibility.
-		return false, nil
+		return false
 	}
 
 	if status.AccountID == requester.ID {
 		// This is requester's status,
 		// so they can always see it.
-		return true, nil
+		return true
 	}
 
 	if status.InReplyToAccountID == requester.ID {
 		// This status replies to requester,
 		// so they can always see it (else
 		// they can't approve it).
-		return true, nil
+		return true
 	}
 
 	if status.BoostOfAccountID == requester.ID {
 		// This status boosts requester,
 		// so they can always see it.
-		return true, nil
+		return true
 	}
 
-	// Nobody else can see this.
+	// Nobody else
-	return false, nil
+	// can see this.
+	return false
 }
 
-func (f *Filter) isStatusVisibleUnauthed(
+// isStatusVisibleUnauthed returns whether status is visible without any unauthenticated account.
-	ctx context.Context,
+func (f *Filter) isStatusVisibleUnauthed(ctx context.Context, status *gtsmodel.Status) (bool, error) {
-	status *gtsmodel.Status,
+
-) (bool, error) {
 	// For remote accounts, only show
 	// Public statuses via the web.
 	if status.Account.IsRemote() {
@@ -275,8 +274,7 @@ func (f *Filter) isStatusVisibleUnauthed(
 		}
 	}
 
-	webVisibility := status.Account.Settings.WebVisibility
+	switch webvis := status.Account.Settings.WebVisibility; webvis {
-	switch webVisibility {
 
 	// public_only: status must be Public.
 	case gtsmodel.VisibilityPublic:
@@ -296,7 +294,7 @@ func (f *Filter) isStatusVisibleUnauthed(
 	default:
 		return false, gtserror.Newf(
 			"unrecognized web visibility for account %s: %s",
-			status.Account.ID, webVisibility,
+			status.Account.ID, webvis,
 		)
 	}
 }

internal/httpclient/client.go

@@ -48,9 +48,6 @@ var (
 
 	// ErrReservedAddr is returned if a dialed address resolves to an IP within a blocked or reserved net.
 	ErrReservedAddr = errors.New("dial within blocked / reserved IP range")
-
-	// ErrBodyTooLarge is returned when a received response body is above predefined limit (default 40MB).
-	ErrBodyTooLarge = errors.New("body size too large")
 )
 
 // Config provides configuration details for setting up a new
@@ -302,7 +299,6 @@ func (c *Client) do(r *Request) (rsp *http.Response, retry bool, err error) {
 		if errorsv2.IsV2(err,
 			context.DeadlineExceeded,
 			context.Canceled,
-			ErrBodyTooLarge,
 			ErrReservedAddr,
 		) {
 			// Non-retryable errors.

internal/processing/common/account.go

@@ -42,6 +42,7 @@ func (p *Processor) GetTargetAccountBy(
 	// Fetch the target account from db.
 	target, err := getTargetFromDB()
 	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		err := gtserror.Newf("error getting from db: %w", err)
 		return nil, false, gtserror.NewErrorInternalError(err)
 	}
 
@@ -57,6 +58,7 @@ func (p *Processor) GetTargetAccountBy(
 	// Check whether target account is visible to requesting account.
 	visible, err = p.visFilter.AccountVisible(ctx, requester, target)
 	if err != nil {
+		err := gtserror.Newf("error checking visibility: %w", err)
 		return nil, false, gtserror.NewErrorInternalError(err)
 	}
 
@@ -128,7 +130,8 @@ func (p *Processor) GetVisibleTargetAccount(
 	return target, nil
 }
 
-// GetAPIAccount fetches the appropriate API account model depending on whether requester = target.
+// GetAPIAccount fetches the appropriate API account
+// model depending on whether requester = target.
 func (p *Processor) GetAPIAccount(
 	ctx context.Context,
 	requester *gtsmodel.Account,
@@ -148,14 +151,15 @@ func (p *Processor) GetAPIAccount(
 	}
 
 	if err != nil {
-		err := gtserror.Newf("error converting account: %w", err)
+		err := gtserror.Newf("error converting: %w", err)
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 
 	return apiAcc, nil
 }
 
-// GetAPIAccountBlocked fetches the limited "blocked" account model for given target.
+// GetAPIAccountBlocked fetches the limited
+// "blocked" account model for given target.
 func (p *Processor) GetAPIAccountBlocked(
 	ctx context.Context,
 	targetAcc *gtsmodel.Account,
@@ -165,7 +169,7 @@ func (p *Processor) GetAPIAccountBlocked(
 ) {
 	apiAccount, err := p.converter.AccountToAPIAccountBlocked(ctx, targetAcc)
 	if err != nil {
-		err = gtserror.Newf("error converting account: %w", err)
+		err := gtserror.Newf("error converting: %w", err)
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 	return apiAccount, nil
@@ -182,7 +186,7 @@ func (p *Processor) GetAPIAccountSensitive(
 ) {
 	apiAccount, err := p.converter.AccountToAPIAccountSensitive(ctx, targetAcc)
 	if err != nil {
-		err = gtserror.Newf("error converting account: %w", err)
+		err := gtserror.Newf("error converting: %w", err)
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 	return apiAccount, nil
@@ -226,8 +230,7 @@ func (p *Processor) getVisibleAPIAccounts(
 ) []*apimodel.Account {
 	// Start new log entry with
 	// the above calling func's name.
-	l := log.
+	l := log.WithContext(ctx).
-		WithContext(ctx).
 		WithField("caller", log.Caller(calldepth+1))
 
 	// Preallocate slice according to expected length.

internal/processing/common/status.go

@@ -25,6 +25,7 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/federation/dereferencing"
 	statusfilter "github.com/superseriousbusiness/gotosocial/internal/filter/status"
+	"github.com/superseriousbusiness/gotosocial/internal/filter/usermute"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/log"
@@ -50,6 +51,7 @@ func (p *Processor) GetTargetStatusBy(
 	// Fetch the target status from db.
 	target, err := getTargetFromDB()
 	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		err := gtserror.Newf("error getting from db: %w", err)
 		return nil, false, gtserror.NewErrorInternalError(err)
 	}
 
@@ -65,6 +67,7 @@ func (p *Processor) GetTargetStatusBy(
 	// Check whether target status is visible to requesting account.
 	visible, err = p.visFilter.StatusVisible(ctx, requester, target)
 	if err != nil {
+		err := gtserror.Newf("error checking visibility: %w", err)
 		return nil, false, gtserror.NewErrorInternalError(err)
 	}
 
@@ -174,14 +177,83 @@ func (p *Processor) GetAPIStatus(
 	apiStatus *apimodel.Status,
 	errWithCode gtserror.WithCode,
 ) {
-	apiStatus, err := p.converter.StatusToAPIStatus(ctx, target, requester, statusfilter.FilterContextNone, nil, nil)
+	apiStatus, err := p.converter.StatusToAPIStatus(ctx,
+		target,
+		requester,
+		statusfilter.FilterContextNone,
+		nil,
+		nil,
+	)
 	if err != nil {
-		err = gtserror.Newf("error converting status: %w", err)
+		err := gtserror.Newf("error converting: %w", err)
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 	return apiStatus, nil
 }
 
+// GetVisibleAPIStatuses converts a slice of statuses to API
+// model statuses, filtering according to visibility to requester
+// along with given filter context, filters and user mutes.
+//
+// Please note that all errors will be logged at ERROR level,
+// but will not be returned. Callers are likely to run into
+// show-stopping errors in the lead-up to this function.
+func (p *Processor) GetVisibleAPIStatuses(
+	ctx context.Context,
+	requester *gtsmodel.Account,
+	statuses []*gtsmodel.Status,
+	filterContext statusfilter.FilterContext,
+	filters []*gtsmodel.Filter,
+	userMutes []*gtsmodel.UserMute,
+) []apimodel.Status {
+
+	// Start new log entry with
+	// the calling function name
+	// as a field in each entry.
+	l := log.WithContext(ctx).
+		WithField("caller", log.Caller(3))
+
+	// Compile mutes to useable user mutes for type converter.
+	compUserMutes := usermute.NewCompiledUserMuteList(userMutes)
+
+	// Iterate filtered statuses for conversion to API model.
+	apiStatuses := make([]apimodel.Status, 0, len(statuses))
+	for _, status := range statuses {
+
+		// Check whether status is visible to requester.
+		visible, err := p.visFilter.StatusVisible(ctx,
+			requester,
+			status,
+		)
+		if err != nil {
+			l.Errorf("error checking visibility: %v", err)
+			continue
+		}
+
+		if !visible {
+			continue
+		}
+
+		// Convert to API status, taking mute / filter into account.
+		apiStatus, err := p.converter.StatusToAPIStatus(ctx,
+			status,
+			requester,
+			filterContext,
+			filters,
+			compUserMutes,
+		)
+		if err != nil && !errors.Is(err, statusfilter.ErrHideStatus) {
+			l.Errorf("error converting: %v", err)
+			continue
+		}
+
+		// Append converted status to return slice.
+		apiStatuses = append(apiStatuses, *apiStatus)
+	}
+
+	return apiStatuses
+}
+
 // InvalidateTimelinedStatus is a shortcut function for invalidating the cached
 // representation one status in the home timeline and all list timelines of the
 // given accountID. It should only be called in cases where a status update

internal/processing/status/context.go

@@ -24,7 +24,6 @@ import (
 
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	statusfilter "github.com/superseriousbusiness/gotosocial/internal/filter/status"
-	"github.com/superseriousbusiness/gotosocial/internal/filter/usermute"
 	"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
@@ -308,22 +307,7 @@ func (p *Processor) ContextGet(
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 
-	convert := func(
+	// Retrieve the full thread context.
-		ctx context.Context,
-		status *gtsmodel.Status,
-		requestingAccount *gtsmodel.Account,
-	) (*apimodel.Status, error) {
-		return p.converter.StatusToAPIStatus(
-			ctx,
-			status,
-			requestingAccount,
-			statusfilter.FilterContextThread,
-			filters,
-			usermute.NewCompiledUserMuteList(mutes),
-		)
-	}
-
-	// Retrieve the thread context.
 	threadContext, errWithCode := p.contextGet(
 		ctx,
 		requester,
@@ -333,34 +317,27 @@ func (p *Processor) ContextGet(
 		return nil, errWithCode
 	}
 
-	apiContext := &apimodel.ThreadContext{
+	var apiContext apimodel.ThreadContext
-		Ancestors:   make([]apimodel.Status, 0, len(threadContext.ancestors)),
-		Descendants: make([]apimodel.Status, 0, len(threadContext.descendants)),
-	}
 
-	// Convert ancestors + filter
+	// Convert and filter the thread context ancestors.
-	// out ones that aren't visible.
+	apiContext.Ancestors = p.c.GetVisibleAPIStatuses(ctx,
-	for _, status := range threadContext.ancestors {
+		requester,
-		if v, err := p.visFilter.StatusVisible(ctx, requester, status); err == nil && v {
+		threadContext.ancestors,
-			status, err := convert(ctx, status, requester)
+		statusfilter.FilterContextThread,
-			if err == nil {
+		filters,
-				apiContext.Ancestors = append(apiContext.Ancestors, *status)
+		mutes,
-			}
+	)
-		}
-	}
 
-	// Convert descendants + filter
+	// Convert and filter the thread context descendants
-	// out ones that aren't visible.
+	apiContext.Descendants = p.c.GetVisibleAPIStatuses(ctx,
-	for _, status := range threadContext.descendants {
+		requester,
-		if v, err := p.visFilter.StatusVisible(ctx, requester, status); err == nil && v {
+		threadContext.descendants,
-			status, err := convert(ctx, status, requester)
+		statusfilter.FilterContextThread,
-			if err == nil {
+		filters,
-				apiContext.Descendants = append(apiContext.Descendants, *status)
+		mutes,
-			}
+	)
-		}
-	}
 
-	return apiContext, nil
+	return &apiContext, nil
 }
 
 // WebContextGet is like ContextGet, but is explicitly

internal/processing/workers/surfacetimeline.go

@@ -384,8 +384,9 @@ func (s *Surface) timelineStatus(
 ) (bool, error) {
 
 	// Ingest status into given timeline using provided function.
-	if inserted, err := ingest(ctx, timelineID, status); err != nil {
+	if inserted, err := ingest(ctx, timelineID, status); err != nil &&
-		err = gtserror.Newf("error ingesting status %s: %w", status.ID, err)
+		!errors.Is(err, statusfilter.ErrHideStatus) {
+		err := gtserror.Newf("error ingesting status %s: %w", status.ID, err)
 		return false, err
 	} else if !inserted {
 		// Nothing more to do.
@@ -400,15 +401,19 @@ func (s *Surface) timelineStatus(
 		filters,
 		mutes,
 	)
-	if err != nil {
+	if err != nil && !errors.Is(err, statusfilter.ErrHideStatus) {
-		err = gtserror.Newf("error converting status %s to frontend representation: %w", status.ID, err)
+		err := gtserror.Newf("error converting status %s to frontend representation: %w", status.ID, err)
 		return true, err
 	}
 
+	if apiStatus != nil {
 		// The status was inserted so stream it to the user.
 		s.Stream.Update(ctx, account, apiStatus, streamType)
-
 		return true, nil
+	}
+
+	// Status was hidden.
+	return false, nil
 }
 
 // timelineAndNotifyStatusForTagFollowers inserts the status into the