From 8cb1a682cc454c1e83fd509ee1b1cde8c18d6f74 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Sun, 22 Apr 2018 20:26:00 +0300
Subject: [PATCH] Ignore negative cache in getWebPageInstantView.

GitOrigin-RevId: 3d4b5f4db209e6c82ed576360ef5867f2c85b9a7
---
 td/telegram/Td.cpp              | 3 ++-
 td/telegram/WebPagesManager.cpp | 8 +++++++-
 td/telegram/WebPagesManager.h   | 2 +-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index f958ac29..acf46934 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -1883,7 +1883,8 @@ class GetWebPageInstantViewRequest : public RequestActor<> {
   WebPageId web_page_id_;
 
   void do_run(Promise<Unit> &&promise) override {
-    web_page_id_ = td->web_pages_manager_->get_web_page_instant_view(url_, force_full_, std::move(promise));
+    web_page_id_ =
+        td->web_pages_manager_->get_web_page_instant_view(url_, force_full_, get_tries() < 3, std::move(promise));
   }
 
   void do_send_result() override {
diff --git a/td/telegram/WebPagesManager.cpp b/td/telegram/WebPagesManager.cpp
index acebe2a0..36a9cd03 100644
--- a/td/telegram/WebPagesManager.cpp
+++ b/td/telegram/WebPagesManager.cpp
@@ -1733,10 +1733,16 @@ tl_object_ptr<td_api::webPage> WebPagesManager::get_web_page_preview_result(int6
   return get_web_page_object(web_page_id);
 }
 
-WebPageId WebPagesManager::get_web_page_instant_view(const string &url, bool force_full, Promise<Unit> &&promise) {
+WebPageId WebPagesManager::get_web_page_instant_view(const string &url, bool force_full, bool force,
+                                                     Promise<Unit> &&promise) {
   LOG(INFO) << "Trying to get web page instant view for the url \"" << url << '"';
   auto it = url_to_web_page_id_.find(url);
   if (it != url_to_web_page_id_.end()) {
+    if (it->second == WebPageId() && !force) {
+      // ignore negative caching
+      reload_web_page_by_url(url, std::move(promise));
+      return WebPageId();
+    }
     return get_web_page_instant_view(it->second, force_full, std::move(promise));
   }
 
diff --git a/td/telegram/WebPagesManager.h b/td/telegram/WebPagesManager.h
index 7c491a8f..360a6f40 100644
--- a/td/telegram/WebPagesManager.h
+++ b/td/telegram/WebPagesManager.h
@@ -60,7 +60,7 @@ class WebPagesManager : public Actor {
 
   tl_object_ptr<td_api::webPage> get_web_page_preview_result(int64 request_id);
 
-  WebPageId get_web_page_instant_view(const string &url, bool force_full, Promise<Unit> &&promise);
+  WebPageId get_web_page_instant_view(const string &url, bool force_full, bool force, Promise<Unit> &&promise);
 
   WebPageId get_web_page_by_url(const string &url) const;