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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <string>
#include <utility>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/feature_list.h"
#include "base/macros.h"
#include "base/run_loop.h"
#include "base/strings/string16.h"
#include "base/strings/string_piece.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "content/public/common/browser_side_navigation_policy.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/shell/browser/shell.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/embedded_test_server/http_request.h"
#include "net/test/embedded_test_server/http_response.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
namespace content {
namespace {
using net::test_server::HttpResponse;
using net::test_server::HttpRequest;
using net::test_server::BasicHttpResponse;
const char kCountedHtmlPath[] = "/counted.html";
const char kCookieHtmlPath[] = "/cookie.html";
class AsyncRevalidationManagerBrowserTest : public ContentBrowserTest {
protected:
AsyncRevalidationManagerBrowserTest() {}
~AsyncRevalidationManagerBrowserTest() override {}
void SetUp() override {
base::FeatureList::ClearInstanceForTesting();
std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList);
feature_list->InitializeFromCommandLine(
"StaleWhileRevalidate2", std::string());
base::FeatureList::SetInstance(std::move(feature_list));
ASSERT_TRUE(embedded_test_server()->InitializeAndListen());
ContentBrowserTest::SetUp();
}
void SetUpOnMainThread() override {
embedded_test_server()->StartAcceptingConnections();
}
base::RunLoop* run_loop() { return &run_loop_; }
int requests_counted() const { return requests_counted_; }
// This method lacks diagnostics for the failure case because TitleWatcher
// will just wait until the test times out if |expected_title| does not
// appear.
bool TitleBecomes(const GURL& url, const std::string& expected_title) {
base::string16 expected_title16(base::ASCIIToUTF16(expected_title));
TitleWatcher title_watcher(shell()->web_contents(), expected_title16);
NavigateToURL(shell(), url);
return title_watcher.WaitAndGetTitle() == expected_title16;
}
void RegisterCountingRequestHandler() {
embedded_test_server()->RegisterRequestHandler(base::Bind(
&AsyncRevalidationManagerBrowserTest::CountingRequestHandler, this));
}
void RegisterCookieRequestHandler() {
embedded_test_server()->RegisterRequestHandler(base::Bind(
&AsyncRevalidationManagerBrowserTest::CookieRequestHandler, this));
}
private:
// A request handler which increases the number in the title tag on every
// request.
std::unique_ptr<HttpResponse> CountingRequestHandler(
const HttpRequest& request) {
if (request.relative_url != kCountedHtmlPath)
return nullptr;
int version = ++requests_counted_;
std::unique_ptr<BasicHttpResponse> http_response(
StaleWhileRevalidateHeaders());
http_response->set_content(
base::StringPrintf("<title>Version %d</title>", version));
// The second time this handler is run is the async revalidation. Tests can
// use this for synchronisation.
if (version == 2)
run_loop_.Quit();
return std::move(http_response);
}
// A request handler which increases a cookie value on every request.
std::unique_ptr<HttpResponse> CookieRequestHandler(
const HttpRequest& request) {
static const char kHtml[] =
"<script>\n"
"var intervalId;\n"
"function checkCookie() {\n"
" if (document.cookie.search(/version=2/) != -1) {\n"
" clearInterval(intervalId);\n"
" document.title = \"PASS\";\n"
" }\n"
"}\n"
"intervalId = setInterval(checkCookie, 10);\n"
"</script>\n"
"<title>Loaded</title>\n";
if (request.relative_url != kCookieHtmlPath)
return nullptr;
int version = ++requests_counted_;
std::unique_ptr<BasicHttpResponse> http_response(
StaleWhileRevalidateHeaders());
http_response->AddCustomHeader("Set-Cookie",
base::StringPrintf("version=%d", version));
http_response->set_content(kHtml);
return std::move(http_response);
}
// Generate the standard response headers common to all request handlers.
std::unique_ptr<BasicHttpResponse> StaleWhileRevalidateHeaders() {
std::unique_ptr<BasicHttpResponse> http_response(new BasicHttpResponse);
http_response->set_code(net::HTTP_OK);
http_response->set_content_type("text/html; charset=utf-8");
http_response->AddCustomHeader("Cache-Control",
"max-age=0, stale-while-revalidate=86400");
// A validator is needed for revalidations, and hence
// stale-while-revalidate, to work.
std::string etag = base::StringPrintf(
"\"AsyncRevalidationManagerBrowserTest%d\"", requests_counted_);
http_response->AddCustomHeader("ETag", etag);
return http_response;
}
base::RunLoop run_loop_;
int requests_counted_ = 0;
DISALLOW_COPY_AND_ASSIGN(AsyncRevalidationManagerBrowserTest);
};
// Verify that the "Cache-Control: stale-while-revalidate" directive correctly
// triggers an async revalidation.
IN_PROC_BROWSER_TEST_F(AsyncRevalidationManagerBrowserTest,
StaleWhileRevalidateIsApplied) {
// PlzNavigate: Stale while revalidate is disabled.
// TODO(clamy): Re-enable the test when there is support.
if (IsBrowserSideNavigationEnabled())
return;
RegisterCountingRequestHandler();
GURL url(embedded_test_server()->GetURL(kCountedHtmlPath));
EXPECT_TRUE(TitleBecomes(url, "Version 1"));
// The first request happens synchronously.
EXPECT_EQ(1, requests_counted());
// Force the renderer to be destroyed so that the Blink cache doesn't
// interfere with the result.
NavigateToURL(shell(), GURL("about:blank"));
// Load the page again. We should get the stale version from the cache.
EXPECT_TRUE(TitleBecomes(url, "Version 1"));
// Wait for the async revalidation to complete.
run_loop()->Run();
EXPECT_EQ(2, requests_counted());
}
// The fresh cache entry must become visible once the async revalidation request
// has been sent.
IN_PROC_BROWSER_TEST_F(AsyncRevalidationManagerBrowserTest, CacheIsUpdated) {
// PlzNavigate: Stale while revalidate is disabled.
// TODO(clamy): Re-enable the test when there is support.
if (IsBrowserSideNavigationEnabled())
return;
using base::ASCIIToUTF16;
RegisterCountingRequestHandler();
GURL url(embedded_test_server()->GetURL(kCountedHtmlPath));
EXPECT_TRUE(TitleBecomes(url, "Version 1"));
// Reset the renderer cache.
NavigateToURL(shell(), GURL("about:blank"));
// Load the page again. We should get the stale version from the cache.
EXPECT_TRUE(TitleBecomes(url, "Version 1"));
// Wait for the async revalidation request to be processed by the
// EmbeddedTestServer.
run_loop()->Run();
// Reset the renderer cache.
NavigateToURL(shell(), GURL("about:blank"));
// Since the async revalidation request has been sent, the cache can no
// longer return the stale contents.
EXPECT_TRUE(TitleBecomes(url, "Version 2"));
}
// When the asynchronous revalidation arrives, any cookies it contains must be
// applied immediately.
IN_PROC_BROWSER_TEST_F(AsyncRevalidationManagerBrowserTest,
CookieSetAsynchronously) {
// PlzNavigate: Stale while revalidate is disabled.
// TODO(clamy): Re-enable the test when there is support.
if (IsBrowserSideNavigationEnabled())
return;
RegisterCookieRequestHandler();
GURL url(embedded_test_server()->GetURL(kCookieHtmlPath));
// Set cookie to version=1
NavigateToURL(shell(), url);
// Reset render cache.
NavigateToURL(shell(), GURL("about:blank"));
// The page will load from the cache, then when the async revalidation
// completes the cookie will update.
EXPECT_TRUE(TitleBecomes(url, "PASS"));
}
} // namespace
} // namespace content
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