From f4fcffc8b56ef73c184ae17892b69181961c15c7 Mon Sep 17 00:00:00 2001
From: kim <89579420+NyaaaWhatsUpDoc@users.noreply.github.com>
Date: Fri, 15 Dec 2023 14:24:39 +0000
Subject: [bugfix] use a much shorter refresh limit for statuses with polls
 (#2453)

* specifically use a much shorter refresh limit for statuses with polls

* allow specifying whether status must be upToDate in calls to Get(Visible)?TargetStatusBy_(), limit force refresh to 5 minute cooldown

* remove the PollID check from statusUpToDate()

* remove unnecessary force flag checks

* remove unused field

* check refresh status error

* use argument name 'refresh' instead of 'upToDate' to better fit with the codebase

* add statuses_poll_id_idx

* remove the definitely-not copy-pasted comment i accidentally typed out in full

* only synchronously refresh if the refresh flag is provided, otherwise do async

* fix wrong force value being provided for async

---------

Co-authored-by: tobi <tobi.smethurst@protonmail.com>
---
 internal/processing/common/status.go | 82 +++++++++++++++++++++++-------------
 1 file changed, 53 insertions(+), 29 deletions(-)

(limited to 'internal/processing/common/status.go')

diff --git a/internal/processing/common/status.go b/internal/processing/common/status.go
index 0a1f495fb..ae03a5306 100644
--- a/internal/processing/common/status.go
+++ b/internal/processing/common/status.go
@@ -30,10 +30,12 @@ import (
 
 // GetTargetStatusBy fetches the target status with db load function, given the authorized (or, nil) requester's
 // account. This returns an approprate gtserror.WithCode accounting for not found and visibility to requester.
+// The refresh argument allows specifying whether the returned copy should be force refreshed.
 func (p *Processor) GetTargetStatusBy(
 	ctx context.Context,
 	requester *gtsmodel.Account,
 	getTargetFromDB func() (*gtsmodel.Status, error),
+	refresh bool,
 ) (
 	status *gtsmodel.Status,
 	visible bool,
@@ -61,47 +63,52 @@ func (p *Processor) GetTargetStatusBy(
 	}
 
 	if requester != nil && visible {
-		// Ensure remote status is up-to-date.
-		p.federator.RefreshStatusAsync(ctx,
-			requester.Username,
-			target,
-			nil,
-			false,
-		)
+		// We only bother refreshing if this status
+		// is visible to requester, AND there *is*
+		// a requester (i.e. request is authorized)
+		// to prevent a possible DOS vector.
+
+		if refresh {
+			// Refresh required, forcibly do synchronously.
+			_, _, err := p.federator.RefreshStatus(ctx,
+				requester.Username,
+				target,
+				nil,
+				true, // force
+			)
+			if err != nil {
+				log.Errorf(ctx, "error refreshing status: %v", err)
+			}
+		} else {
+			// Only refresh async *if* out-of-date.
+			p.federator.RefreshStatusAsync(ctx,
+				requester.Username,
+				target,
+				nil,
+				false, // force
+			)
+		}
 	}
 
 	return target, visible, nil
 }
 
-// GetTargetStatusByID is a call-through to GetTargetStatus() using the db GetStatusByID() function.
-func (p *Processor) GetTargetStatusByID(
-	ctx context.Context,
-	requester *gtsmodel.Account,
-	targetID string,
-) (
-	status *gtsmodel.Status,
-	visible bool,
-	errWithCode gtserror.WithCode,
-) {
-	return p.GetTargetStatusBy(ctx, requester, func() (*gtsmodel.Status, error) {
-		return p.state.DB.GetStatusByID(ctx, targetID)
-	})
-}
-
-// GetVisibleTargetStatus calls GetTargetStatusByID(),
+// GetVisibleTargetStatus calls GetTargetStatusBy(),
 // but converts a non-visible result to not-found error.
-func (p *Processor) GetVisibleTargetStatus(
+func (p *Processor) GetVisibleTargetStatusBy(
 	ctx context.Context,
 	requester *gtsmodel.Account,
-	targetID string,
+	getTargetFromDB func() (*gtsmodel.Status, error),
+	refresh bool,
 ) (
 	status *gtsmodel.Status,
 	errWithCode gtserror.WithCode,
 ) {
 	// Fetch the target status by ID from the database.
-	target, visible, errWithCode := p.GetTargetStatusByID(ctx,
+	target, visible, errWithCode := p.GetTargetStatusBy(ctx,
 		requester,
-		targetID,
+		getTargetFromDB,
+		refresh,
 	)
 	if errWithCode != nil {
 		return nil, errWithCode
@@ -119,6 +126,22 @@ func (p *Processor) GetVisibleTargetStatus(
 	return target, nil
 }
 
+// GetVisibleTargetStatus calls GetVisibleTargetStatusBy(),
+// passing in a database function that fetches by status ID.
+func (p *Processor) GetVisibleTargetStatus(
+	ctx context.Context,
+	requester *gtsmodel.Account,
+	targetID string,
+	refresh bool,
+) (
+	status *gtsmodel.Status,
+	errWithCode gtserror.WithCode,
+) {
+	return p.GetVisibleTargetStatusBy(ctx, requester, func() (*gtsmodel.Status, error) {
+		return p.state.DB.GetStatusByID(ctx, targetID)
+	}, refresh)
+}
+
 // UnwrapIfBoost "unwraps" the given status if
 // it's a boost wrapper, by returning the boosted
 // status it targets (pending visibility checks).
@@ -132,9 +155,10 @@ func (p *Processor) UnwrapIfBoost(
 	if status.BoostOfID == "" {
 		return status, nil
 	}
-
 	return p.GetVisibleTargetStatus(ctx,
-		requester, status.BoostOfID,
+		requester,
+		status.BoostOfID,
+		false,
 	)
 }
 
-- 
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