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proxy_resolver_v8_tracing_wrapper_unittest.cc
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proxy_resolver_v8_tracing_wrapper_unittest.cc
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// Copyright (c) 2013 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 "net/proxy/proxy_resolver_v8_tracing_wrapper.h"
#include <string>
#include "base/files/file_util.h"
#include "base/memory/ptr_util.h"
#include "base/message_loop/message_loop.h"
#include "base/path_service.h"
#include "base/run_loop.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/platform_thread.h"
#include "base/values.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "net/dns/host_cache.h"
#include "net/dns/mock_host_resolver.h"
#include "net/log/net_log_event_type.h"
#include "net/log/net_log_with_source.h"
#include "net/log/test_net_log.h"
#include "net/log/test_net_log_entry.h"
#include "net/log/test_net_log_util.h"
#include "net/proxy/proxy_info.h"
#include "net/proxy/proxy_resolver_error_observer.h"
#include "net/test/event_waiter.h"
#include "net/test/gtest_util.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
using net::test::IsError;
using net::test::IsOk;
namespace net {
namespace {
class ProxyResolverV8TracingWrapperTest : public testing::Test {
public:
void TearDown() override {
// Drain any pending messages, which may be left over from cancellation.
// This way they get reliably run as part of the current test, rather than
// spilling into the next test's execution.
base::RunLoop().RunUntilIdle();
}
};
scoped_refptr<ProxyResolverScriptData> LoadScriptData(const char* filename) {
base::FilePath path;
PathService::Get(base::DIR_SOURCE_ROOT, &path);
path = path.AppendASCII("net");
path = path.AppendASCII("data");
path = path.AppendASCII("proxy_resolver_v8_tracing_unittest");
path = path.AppendASCII(filename);
// Try to read the file from disk.
std::string file_contents;
bool ok = base::ReadFileToString(path, &file_contents);
// If we can't load the file from disk, something is misconfigured.
EXPECT_TRUE(ok) << "Failed to read file: " << path.value();
// Load the PAC script into the ProxyResolver.
return ProxyResolverScriptData::FromUTF8(file_contents);
}
std::unique_ptr<ProxyResolverErrorObserver> ReturnErrorObserver(
std::unique_ptr<ProxyResolverErrorObserver> error_observer) {
return error_observer;
}
std::unique_ptr<ProxyResolver> CreateResolver(
NetLog* net_log,
HostResolver* host_resolver,
std::unique_ptr<ProxyResolverErrorObserver> error_observer,
const char* filename) {
std::unique_ptr<ProxyResolver> resolver;
ProxyResolverFactoryV8TracingWrapper factory(
host_resolver, net_log,
base::Bind(&ReturnErrorObserver, base::Passed(&error_observer)));
TestCompletionCallback callback;
std::unique_ptr<ProxyResolverFactory::Request> request;
int rv = factory.CreateProxyResolver(LoadScriptData(filename), &resolver,
callback.callback(), &request);
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_TRUE(resolver);
return resolver;
}
class MockErrorObserver : public ProxyResolverErrorObserver {
public:
void OnPACScriptError(int line_number, const base::string16& error) override {
output += base::StringPrintf("Error: line %d: %s\n", line_number,
base::UTF16ToASCII(error).c_str());
waiter_.NotifyEvent(EVENT_ERROR);
if (!error_callback_.is_null())
error_callback_.Run();
}
std::string GetOutput() {
return output;
}
void RunOnError(const base::Closure& callback) {
error_callback_ = callback;
waiter_.WaitForEvent(EVENT_ERROR);
}
private:
enum Event {
EVENT_ERROR,
};
std::string output;
base::Closure error_callback_;
EventWaiter<Event> waiter_;
};
TEST_F(ProxyResolverV8TracingWrapperTest, Simple) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
&log, &host_resolver, base::WrapUnique(error_observer), "simple.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ("foo:99", proxy_info.proxy_server().ToURI());
EXPECT_EQ(0u, host_resolver.num_resolve());
// There were no errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- nothing was logged.
EXPECT_EQ(0u, log.GetSize());
EXPECT_EQ(0u, request_log.GetSize());
}
TEST_F(ProxyResolverV8TracingWrapperTest, JavascriptError) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
&log, &host_resolver, base::WrapUnique(error_observer), "error.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://throw-an-error/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsError(ERR_PAC_SCRIPT_FAILED));
EXPECT_EQ(0u, host_resolver.num_resolve());
EXPECT_EQ(
"Error: line 5: Uncaught TypeError: Cannot read property 'split' "
"of null\n",
error_observer->GetOutput());
// Check the NetLogs -- there was 1 alert and 1 javascript error, and they
// were output to both the global log, and per-request log.
TestNetLogEntry::List entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const TestNetLogEntry::List& entries = entries_list[list_i];
EXPECT_EQ(2u, entries.size());
EXPECT_TRUE(LogContainsEvent(entries, 0,
NetLogEventType::PAC_JAVASCRIPT_ALERT,
NetLogEventPhase::NONE));
EXPECT_TRUE(LogContainsEvent(entries, 1,
NetLogEventType::PAC_JAVASCRIPT_ERROR,
NetLogEventPhase::NONE));
EXPECT_EQ("{\"message\":\"Prepare to DIE!\"}", entries[0].GetParamsJson());
EXPECT_EQ(
"{\"line_number\":5,\"message\":\"Uncaught TypeError: Cannot "
"read property 'split' of null\"}",
entries[1].GetParamsJson());
}
}
TEST_F(ProxyResolverV8TracingWrapperTest, TooManyAlerts) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver =
CreateResolver(&log, &host_resolver, base::WrapUnique(error_observer),
"too_many_alerts.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
// Iteration1 does a DNS resolve
// Iteration2 exceeds the alert buffer
// Iteration3 runs in blocking mode and completes
EXPECT_EQ("foo:3", proxy_info.proxy_server().ToURI());
EXPECT_EQ(1u, host_resolver.num_resolve());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 50 alerts, which were mirrored
// to both the global and per-request logs.
TestNetLogEntry::List entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const TestNetLogEntry::List& entries = entries_list[list_i];
EXPECT_EQ(50u, entries.size());
for (size_t i = 0; i < entries.size(); ++i) {
ASSERT_TRUE(LogContainsEvent(entries, i,
NetLogEventType::PAC_JAVASCRIPT_ALERT,
NetLogEventPhase::NONE));
}
}
}
// Verify that buffered alerts cannot grow unboundedly, even when the message is
// empty string.
TEST_F(ProxyResolverV8TracingWrapperTest, TooManyEmptyAlerts) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver =
CreateResolver(&log, &host_resolver, base::WrapUnique(error_observer),
"too_many_empty_alerts.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ("foo:3", proxy_info.proxy_server().ToURI());
EXPECT_EQ(1u, host_resolver.num_resolve());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 50 alerts, which were mirrored
// to both the global and per-request logs.
TestNetLogEntry::List entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const TestNetLogEntry::List& entries = entries_list[list_i];
EXPECT_EQ(1000u, entries.size());
for (size_t i = 0; i < entries.size(); ++i) {
ASSERT_TRUE(LogContainsEvent(entries, i,
NetLogEventType::PAC_JAVASCRIPT_ALERT,
NetLogEventPhase::NONE));
}
}
}
// This test runs a PAC script that issues a sequence of DNS resolves. The test
// verifies the final result, and that the underlying DNS resolver received
// the correct set of queries.
TEST_F(ProxyResolverV8TracingWrapperTest, Dns) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddRuleForAddressFamily("host1", ADDRESS_FAMILY_IPV4,
"166.155.144.44");
host_resolver.rules()->AddIPLiteralRule("host1", "::1,192.168.1.1",
std::string());
host_resolver.rules()->AddSimulatedFailure("host2");
host_resolver.rules()->AddRule("host3", "166.155.144.33");
host_resolver.rules()->AddRule("host5", "166.155.144.55");
host_resolver.rules()->AddSimulatedFailure("host6");
host_resolver.rules()->AddRuleForAddressFamily("*", ADDRESS_FAMILY_IPV4,
"122.133.144.155");
host_resolver.rules()->AddRule("*", "133.122.100.200");
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
&log, &host_resolver, base::WrapUnique(error_observer), "dns.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
// The test does 13 DNS resolution, however only 7 of them are unique.
EXPECT_EQ(7u, host_resolver.num_resolve());
const char* kExpectedResult =
"122.133.144.155-" // myIpAddress()
"null-" // dnsResolve('')
"__1_192.168.1.1-" // dnsResolveEx('host1')
"null-" // dnsResolve('host2')
"166.155.144.33-" // dnsResolve('host3')
"122.133.144.155-" // myIpAddress()
"166.155.144.33-" // dnsResolve('host3')
"__1_192.168.1.1-" // dnsResolveEx('host1')
"122.133.144.155-" // myIpAddress()
"null-" // dnsResolve('host2')
"-" // dnsResolveEx('host6')
"133.122.100.200-" // myIpAddressEx()
"166.155.144.44" // dnsResolve('host1')
":99";
EXPECT_EQ(kExpectedResult, proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 1 alert, mirrored to both
// the per-request and global logs.
TestNetLogEntry::List entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const TestNetLogEntry::List& entries = entries_list[list_i];
EXPECT_EQ(1u, entries.size());
EXPECT_TRUE(LogContainsEvent(entries, 0,
NetLogEventType::PAC_JAVASCRIPT_ALERT,
NetLogEventPhase::NONE));
EXPECT_EQ("{\"message\":\"iteration: 7\"}", entries[0].GetParamsJson());
}
}
// This test runs a PAC script that does "myIpAddress()" followed by
// "dnsResolve()". This requires 2 restarts. However once the HostResolver's
// cache is warmed, subsequent calls should take 0 restarts.
TEST_F(ProxyResolverV8TracingWrapperTest, DnsChecksCache) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddRule("foopy", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
&log, &host_resolver, base::WrapUnique(error_observer), "simple_dns.js");
TestCompletionCallback callback1;
TestCompletionCallback callback2;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foopy/req1"), &proxy_info,
callback1.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback1.WaitForResult(), IsOk());
// The test does 2 DNS resolutions.
EXPECT_EQ(2u, host_resolver.num_resolve());
// The first request took 2 restarts, hence on g_iteration=3.
EXPECT_EQ("166.155.144.11:3", proxy_info.proxy_server().ToURI());
std::unique_ptr<ProxyResolver::Request> req2;
rv = resolver->GetProxyForURL(GURL("http://foopy/req2"), &proxy_info,
callback2.callback(), &req2,
request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback2.WaitForResult(), IsOk());
EXPECT_EQ(4u, host_resolver.num_resolve());
// This time no restarts were required, so g_iteration incremented by 1.
EXPECT_EQ("166.155.144.11:4", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
EXPECT_EQ(0u, log.GetSize());
EXPECT_EQ(0u, request_log.GetSize());
}
// This test runs a weird PAC script that was designed to defeat the DNS tracing
// optimization. The proxy resolver should detect the inconsistency and
// fall-back to synchronous mode execution.
TEST_F(ProxyResolverV8TracingWrapperTest, FallBackToSynchronous1) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddRule("host1", "166.155.144.11");
host_resolver.rules()->AddRule("crazy4", "133.199.111.4");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolver> resolver =
CreateResolver(&log, &host_resolver, base::WrapUnique(error_observer),
"global_sideffects1.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
// The script itself only does 2 DNS resolves per execution, however it
// constructs the hostname using a global counter which changes on each
// invocation.
EXPECT_EQ(3u, host_resolver.num_resolve());
EXPECT_EQ("166.155.144.11-133.199.111.4:100",
proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- the script generated 1 alert, mirrored to both
// the per-request and global logs.
TestNetLogEntry::List entries_list[2];
log.GetEntries(&entries_list[0]);
request_log.GetEntries(&entries_list[1]);
for (size_t list_i = 0; list_i < arraysize(entries_list); list_i++) {
const TestNetLogEntry::List& entries = entries_list[list_i];
EXPECT_EQ(1u, entries.size());
EXPECT_TRUE(LogContainsEvent(entries, 0,
NetLogEventType::PAC_JAVASCRIPT_ALERT,
NetLogEventPhase::NONE));
EXPECT_EQ("{\"message\":\"iteration: 4\"}", entries[0].GetParamsJson());
}
}
// This test runs a weird PAC script that was designed to defeat the DNS tracing
// optimization. The proxy resolver should detect the inconsistency and
// fall-back to synchronous mode execution.
TEST_F(ProxyResolverV8TracingWrapperTest, FallBackToSynchronous2) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddRule("host1", "166.155.144.11");
host_resolver.rules()->AddRule("host2", "166.155.144.22");
host_resolver.rules()->AddRule("host3", "166.155.144.33");
host_resolver.rules()->AddRule("host4", "166.155.144.44");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolver> resolver =
CreateResolver(&log, &host_resolver, base::WrapUnique(error_observer),
"global_sideffects2.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ(3u, host_resolver.num_resolve());
EXPECT_EQ("166.155.144.44:100", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- nothing was logged.
EXPECT_EQ(0u, log.GetSize());
EXPECT_EQ(0u, request_log.GetSize());
}
// This test runs a weird PAC script that yields a never ending sequence
// of DNS resolves when restarting. Running it will hit the maximum
// DNS resolves per request limit (20) after which every DNS resolve will
// fail.
TEST_F(ProxyResolverV8TracingWrapperTest, InfiniteDNSSequence) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddRule("host*", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolver> resolver =
CreateResolver(&log, &host_resolver, base::WrapUnique(error_observer),
"global_sideffects3.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ(20u, host_resolver.num_resolve());
EXPECT_EQ(
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"166.155.144.11-166.155.144.11-166.155.144.11-166.155.144.11-"
"null:21",
proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- 1 alert was logged.
EXPECT_EQ(1u, log.GetSize());
EXPECT_EQ(1u, request_log.GetSize());
}
// This test runs a weird PAC script that yields a never ending sequence
// of DNS resolves when restarting. Running it will hit the maximum
// DNS resolves per request limit (20) after which every DNS resolve will
// fail.
TEST_F(ProxyResolverV8TracingWrapperTest, InfiniteDNSSequence2) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddRule("host*", "166.155.144.11");
host_resolver.rules()->AddRule("*", "122.133.144.155");
std::unique_ptr<ProxyResolver> resolver =
CreateResolver(&log, &host_resolver, base::WrapUnique(error_observer),
"global_sideffects4.js");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ(20u, host_resolver.num_resolve());
EXPECT_EQ("null21:34", proxy_info.proxy_server().ToURI());
// No errors.
EXPECT_EQ("", error_observer->GetOutput());
// Check the NetLogs -- 1 alert was logged.
EXPECT_EQ(1u, log.GetSize());
EXPECT_EQ(1u, request_log.GetSize());
}
void DnsDuringInitHelper(bool synchronous_host_resolver) {
TestNetLog log;
BoundTestNetLog request_log;
MockCachingHostResolver host_resolver;
host_resolver.set_synchronous_mode(synchronous_host_resolver);
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddRule("host1", "91.13.12.1");
host_resolver.rules()->AddRule("host2", "91.13.12.2");
std::unique_ptr<ProxyResolver> resolver =
CreateResolver(&log, &host_resolver, base::WrapUnique(error_observer),
"dns_during_init.js");
// Initialization did 2 dnsResolves.
EXPECT_EQ(2u, host_resolver.num_resolve());
host_resolver.rules()->ClearRules();
host_resolver.GetHostCache()->clear();
host_resolver.rules()->AddRule("host1", "145.88.13.3");
host_resolver.rules()->AddRule("host2", "137.89.8.45");
TestCompletionCallback callback;
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> req;
int rv =
resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
callback.callback(), &req, request_log.bound());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
// Fetched host1 and host2 again, since the ones done during initialization
// should not have been cached.
EXPECT_EQ(4u, host_resolver.num_resolve());
EXPECT_EQ("91.13.12.1-91.13.12.2-145.88.13.3-137.89.8.45:99",
proxy_info.proxy_server().ToURI());
// Check the NetLogs -- the script generated 2 alerts during initialization.
EXPECT_EQ(0u, request_log.GetSize());
TestNetLogEntry::List entries;
log.GetEntries(&entries);
ASSERT_EQ(2u, entries.size());
EXPECT_TRUE(LogContainsEvent(entries, 0,
NetLogEventType::PAC_JAVASCRIPT_ALERT,
NetLogEventPhase::NONE));
EXPECT_TRUE(LogContainsEvent(entries, 1,
NetLogEventType::PAC_JAVASCRIPT_ALERT,
NetLogEventPhase::NONE));
EXPECT_EQ("{\"message\":\"Watsup\"}", entries[0].GetParamsJson());
EXPECT_EQ("{\"message\":\"Watsup2\"}", entries[1].GetParamsJson());
}
// Tests a PAC script which does DNS resolves during initialization.
TEST_F(ProxyResolverV8TracingWrapperTest, DnsDuringInit) {
// Test with both both a host resolver that always completes asynchronously,
// and then again with one that completes synchronously.
DnsDuringInitHelper(false);
DnsDuringInitHelper(true);
}
void CrashCallback(int) {
// Be extra sure that if the callback ever gets invoked, the test will fail.
CHECK(false);
}
// Start some requests, cancel them all, and then destroy the resolver.
// Note the execution order for this test can vary. Since multiple
// threads are involved, the cancellation may be received a different
// times.
TEST_F(ProxyResolverV8TracingWrapperTest, CancelAll) {
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddSimulatedFailure("*");
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
nullptr, &host_resolver, base::WrapUnique(error_observer), "dns.js");
const size_t kNumRequests = 5;
ProxyInfo proxy_info[kNumRequests];
std::unique_ptr<ProxyResolver::Request> request[kNumRequests];
for (size_t i = 0; i < kNumRequests; ++i) {
int rv = resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info[i],
base::Bind(&CrashCallback), &request[i],
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
}
for (size_t i = 0; i < kNumRequests; ++i) {
request[i].reset();
}
}
// Note the execution order for this test can vary. Since multiple
// threads are involved, the cancellation may be received a different
// times.
TEST_F(ProxyResolverV8TracingWrapperTest, CancelSome) {
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddSimulatedFailure("*");
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
nullptr, &host_resolver, base::WrapUnique(error_observer), "dns.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
std::unique_ptr<ProxyResolver::Request> request1;
std::unique_ptr<ProxyResolver::Request> request2;
TestCompletionCallback callback;
int rv = resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info1,
base::Bind(&CrashCallback), &request1,
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
rv = resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info2,
callback.callback(), &request2,
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
request1.reset();
EXPECT_THAT(callback.WaitForResult(), IsOk());
}
// Cancel a request after it has finished running on the worker thread, and has
// posted a task the completion task back to origin thread.
TEST_F(ProxyResolverV8TracingWrapperTest, CancelWhilePendingCompletionTask) {
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
host_resolver.rules()->AddSimulatedFailure("*");
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
nullptr, &host_resolver, base::WrapUnique(error_observer), "error.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
std::unique_ptr<ProxyResolver::Request> request1;
std::unique_ptr<ProxyResolver::Request> request2;
TestCompletionCallback callback;
int rv = resolver->GetProxyForURL(GURL("http://throw-an-error/"),
&proxy_info1, base::Bind(&CrashCallback),
&request1, NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
// Wait until the first request has finished running on the worker thread.
// Cancel the first request, while it has a pending completion task on
// the origin thread. Reset deletes Request object which cancels the request.
error_observer->RunOnError(
base::Bind(&std::unique_ptr<ProxyResolver::Request>::reset,
base::Unretained(&request1), nullptr));
// Start another request, to make sure it is able to complete.
rv = resolver->GetProxyForURL(GURL("http://i-have-no-idea-what-im-doing/"),
&proxy_info2, callback.callback(), &request2,
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
EXPECT_THAT(callback.WaitForResult(), IsOk());
EXPECT_EQ("i-approve-this-message:42", proxy_info2.proxy_server().ToURI());
}
// This implementation of HostResolver allows blocking until a resolve request
// has been received. The resolve requests it receives will never be completed.
class BlockableHostResolver : public HostResolver {
public:
BlockableHostResolver()
: num_cancelled_requests_(0), waiting_for_resolve_(false) {}
int Resolve(const RequestInfo& info,
RequestPriority priority,
AddressList* addresses,
const CompletionCallback& callback,
std::unique_ptr<Request>* out_req,
const NetLogWithSource& net_log) override {
EXPECT_FALSE(callback.is_null());
EXPECT_TRUE(out_req);
if (!action_.is_null())
action_.Run();
// Indicate to the caller that a request was received.
EXPECT_TRUE(waiting_for_resolve_);
base::MessageLoop::current()->QuitWhenIdle();
// This line is intentionally after action_.Run(), since one of the
// tests does a cancellation inside of Resolve(), and it is more
// interesting if *out_req hasn't been written yet at that point.
out_req->reset(new RequestImpl(this));
// Return ERR_IO_PENDING as this request will NEVER be completed.
// Expectation is for the caller to later cancel the request.
return ERR_IO_PENDING;
}
int ResolveFromCache(const RequestInfo& info,
AddressList* addresses,
const NetLogWithSource& net_log) override {
NOTREACHED();
return ERR_DNS_CACHE_MISS;
}
void IncreaseNumOfCancelledRequests() { num_cancelled_requests_++; }
void SetAction(const base::Callback<void(void)>& action) { action_ = action; }
// Waits until Resolve() has been called.
void WaitUntilRequestIsReceived() {
waiting_for_resolve_ = true;
base::RunLoop().Run();
DCHECK(waiting_for_resolve_);
waiting_for_resolve_ = false;
}
int num_cancelled_requests() const { return num_cancelled_requests_; }
private:
class RequestImpl : public HostResolver::Request {
public:
RequestImpl(BlockableHostResolver* resolver) : resolver_(resolver) {}
~RequestImpl() override {
if (resolver_)
resolver_->IncreaseNumOfCancelledRequests();
}
void ChangeRequestPriority(RequestPriority priority) override {}
private:
BlockableHostResolver* resolver_;
DISALLOW_COPY_AND_ASSIGN(RequestImpl);
};
int num_cancelled_requests_;
bool waiting_for_resolve_;
base::Callback<void(void)> action_;
};
// This cancellation test exercises a more predictable cancellation codepath --
// when the request has an outstanding DNS request in flight.
TEST_F(ProxyResolverV8TracingWrapperTest,
CancelWhileOutstandingNonBlockingDns) {
BlockableHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
nullptr, &host_resolver, base::WrapUnique(error_observer), "dns.js");
ProxyInfo proxy_info1;
ProxyInfo proxy_info2;
std::unique_ptr<ProxyResolver::Request> request1;
std::unique_ptr<ProxyResolver::Request> request2;
int rv = resolver->GetProxyForURL(GURL("http://foo/req1"), &proxy_info1,
base::Bind(&CrashCallback), &request1,
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
host_resolver.WaitUntilRequestIsReceived();
rv = resolver->GetProxyForURL(GURL("http://foo/req2"), &proxy_info2,
base::Bind(&CrashCallback), &request2,
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
host_resolver.WaitUntilRequestIsReceived();
request1.reset();
request2.reset();
EXPECT_EQ(2, host_resolver.num_cancelled_requests());
// After leaving this scope, the ProxyResolver is destroyed.
// This should not cause any problems, as the outstanding work
// should have been cancelled.
}
void CancelRequestAndPause(std::unique_ptr<ProxyResolver::Request>* request) {
request->reset();
// Sleep for a little bit. This makes it more likely for the worker
// thread to have returned from its call, and serves as a regression
// test for http://crbug.com/173373.
base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(30));
}
// In non-blocking mode, the worker thread actually does block for
// a short time to see if the result is in the DNS cache. Test
// cancellation while the worker thread is waiting on this event.
TEST_F(ProxyResolverV8TracingWrapperTest, CancelWhileBlockedInNonBlockingDns) {
BlockableHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
nullptr, &host_resolver, base::WrapUnique(error_observer), "dns.js");
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> request;
int rv = resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
base::Bind(&CrashCallback), &request,
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
host_resolver.SetAction(base::Bind(CancelRequestAndPause, &request));
host_resolver.WaitUntilRequestIsReceived();
}
// Cancel the request while there is a pending DNS request, however before
// the request is sent to the host resolver.
TEST_F(ProxyResolverV8TracingWrapperTest, CancelWhileBlockedInNonBlockingDns2) {
MockCachingHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver = CreateResolver(
nullptr, &host_resolver, base::WrapUnique(error_observer), "dns.js");
ProxyInfo proxy_info;
std::unique_ptr<ProxyResolver::Request> request;
int rv = resolver->GetProxyForURL(GURL("http://foo/"), &proxy_info,
base::Bind(&CrashCallback), &request,
NetLogWithSource());
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
// Wait a bit, so the DNS task has hopefully been posted. The test will
// work whatever the delay is here, but it is most useful if the delay
// is large enough to allow a task to be posted back.
base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(10));
request.reset();
EXPECT_EQ(0u, host_resolver.num_resolve());
}
TEST_F(ProxyResolverV8TracingWrapperTest,
CancelCreateResolverWhileOutstandingBlockingDns) {
BlockableHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
ProxyResolverFactoryV8TracingWrapper factory(
&host_resolver, nullptr,
base::Bind(&ReturnErrorObserver,
base::Passed(base::WrapUnique(error_observer))));
std::unique_ptr<ProxyResolver> resolver;
std::unique_ptr<ProxyResolverFactory::Request> request;
int rv = factory.CreateProxyResolver(LoadScriptData("dns_during_init.js"),
&resolver, base::Bind(&CrashCallback),
&request);
EXPECT_THAT(rv, IsError(ERR_IO_PENDING));
host_resolver.WaitUntilRequestIsReceived();
request.reset();
EXPECT_EQ(1, host_resolver.num_cancelled_requests());
}
TEST_F(ProxyResolverV8TracingWrapperTest,
DeleteFactoryWhileOutstandingBlockingDns) {
BlockableHostResolver host_resolver;
MockErrorObserver* error_observer = new MockErrorObserver;
std::unique_ptr<ProxyResolver> resolver;
std::unique_ptr<ProxyResolverFactory::Request> request;
{
ProxyResolverFactoryV8TracingWrapper factory(
&host_resolver, nullptr,
base::Bind(&ReturnErrorObserver,
base::Passed(base::WrapUnique(error_observer))));
int rv = factory.CreateProxyResolver(LoadScriptData("dns_during_init.js"),