From 3b6574181e5e0a5d99ed9dcdb5cb9a47af2499d0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Wed, 1 Apr 2015 00:23:17 +0200
Subject: [PATCH] GH-853 evict asset index files from cache when they don't
 parse

---
 logic/OneSixUpdate.cpp      |  3 +++
 logic/net/HttpMetaCache.cpp | 16 ++++++++++++++++
 logic/net/HttpMetaCache.h   |  3 +++
 3 files changed, 22 insertions(+)

diff --git a/logic/OneSixUpdate.cpp b/logic/OneSixUpdate.cpp
index 9d478650..5663484a 100644
--- a/logic/OneSixUpdate.cpp
+++ b/logic/OneSixUpdate.cpp
@@ -118,6 +118,9 @@ void OneSixUpdate::assetIndexFinished()
 	QString asset_fname = "assets/indexes/" + assetName + ".json";
 	if (!AssetsUtils::loadAssetsIndexJson(asset_fname, &index))
 	{
+		auto metacache = MMC->metacache();
+		auto entry = metacache->resolveEntry("asset_indexes", assetName + ".json");
+		metacache->evictEntry(entry);
 		emitFailed(tr("Failed to read the assets index!"));
 	}
 
diff --git a/logic/net/HttpMetaCache.cpp b/logic/net/HttpMetaCache.cpp
index eb13ee6b..4533a736 100644
--- a/logic/net/HttpMetaCache.cpp
+++ b/logic/net/HttpMetaCache.cpp
@@ -135,6 +135,17 @@ bool HttpMetaCache::updateEntry(MetaEntryPtr stale_entry)
 	return true;
 }
 
+bool HttpMetaCache::evictEntry(MetaEntryPtr entry)
+{
+	if(entry)
+	{
+		entry->stale = true;
+		SaveEventually();
+		return true;
+	}
+	return false;
+}
+
 MetaEntryPtr HttpMetaCache::staleEntry(QString base, QString resource_path)
 {
 	auto foo = new MetaEntry;
@@ -228,6 +239,11 @@ void HttpMetaCache::SaveNow()
 	{
 		for (auto entry : group.entry_list)
 		{
+			// do not save stale entries. they are dead.
+			if(entry->stale)
+			{
+				continue;
+			}
 			QJsonObject entryObj;
 			entryObj.insert("base", QJsonValue(entry->base));
 			entryObj.insert("path", QJsonValue(entry->path));
diff --git a/logic/net/HttpMetaCache.h b/logic/net/HttpMetaCache.h
index 55a34165..dd44623c 100644
--- a/logic/net/HttpMetaCache.h
+++ b/logic/net/HttpMetaCache.h
@@ -51,6 +51,9 @@ public:
 	// add a previously resolved stale entry
 	bool updateEntry(MetaEntryPtr stale_entry);
 
+	// evict selected entry from cache
+	bool evictEntry(MetaEntryPtr entry);
+
 	void addBase(QString base, QString base_root);
 
 	// (re)start a timer that calls SaveNow later.