Initial implementation for CertNetFetcher.

net/cert/cert_net_fetcher_unittest.cc

+// 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 "net/cert/cert_net_fetcher.h"
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "net/cert/mock_cert_verifier.h"
+#include "net/dns/mock_host_resolver.h"
+#include "net/http/http_server_properties_impl.h"
+#include "net/test/spawned_test_server/spawned_test_server.h"
+#include "net/url_request/url_request_job_factory_impl.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+// TODO(eroman): Test that cookies aren't sent.
+// TODO(eroman): Request de-duplication
+// TODO(eroman): Cancel duplicated requests within a callback
+// TODO(eroman): Start requests for the same job within a callback
+// TODO(eroman): Delete the CertNetFetcher within callback
+
+using base::ASCIIToUTF16;
+
+namespace net {
+
+namespace {
+
+const base::FilePath::CharType kDocRoot[] =
+    FILE_PATH_LITERAL("net/data/cert_net_fetcher_unittest");
+
+// A non-mock URL request which can access http:// urls.
+class RequestContext : public URLRequestContext {
+ public:
+  RequestContext() : storage_(this) {
+    ProxyConfig no_proxy;
+    storage_.set_host_resolver(scoped_ptr<HostResolver>(new MockHostResolver));
+    storage_.set_cert_verifier(new MockCertVerifier);
+    storage_.set_transport_security_state(new TransportSecurityState);
+    storage_.set_proxy_service(ProxyService::CreateFixed(no_proxy));
+    storage_.set_ssl_config_service(new SSLConfigServiceDefaults);
+    storage_.set_http_server_properties(
+        scoped_ptr<HttpServerProperties>(new HttpServerPropertiesImpl()));
+
+    HttpNetworkSession::Params params;
+    params.host_resolver = host_resolver();
+    params.cert_verifier = cert_verifier();
+    params.transport_security_state = transport_security_state();
+    params.proxy_service = proxy_service();
+    params.ssl_config_service = ssl_config_service();
+    params.http_server_properties = http_server_properties();
+    scoped_refptr<HttpNetworkSession> network_session(
+        new HttpNetworkSession(params));
+    storage_.set_http_transaction_factory(new HttpCache(
+        network_session.get(), HttpCache::DefaultBackend::InMemory(0)));
+    URLRequestJobFactoryImpl* job_factory = new URLRequestJobFactoryImpl();
+    storage_.set_job_factory(job_factory);
+  }
+
+  ~RequestContext() override { AssertNoURLRequests(); }
+
+ private:
+  URLRequestContextStorage storage_;
+};
+
+struct FetchResult {
+  std::string GetBodyAsString() const {
+    return std::string(response_body.begin(), response_body.end());
+  }
+
+  int net_error;
+  std::vector<uint8_t> response_body;
+};
+
+// Helper to synchronously wait on the callback to be called.
+// Similar to TestCompletionCallback but built around FetchCallback.
+class TestFetchCallback {
+ public:
+  TestFetchCallback()
+      : callback_(
+            base::Bind(&TestFetchCallback::OnCallback, base::Unretained(this))),
+        have_result_(false),
+        waiting_for_result_(false) {}
+
+  const CertNetFetcher::FetchCallback& callback() const { return callback_; }
+
+  FetchResult WaitForResult() {
+    DCHECK(!waiting_for_result_);
+    while (!have_result_) {
+      waiting_for_result_ = true;
+      base::MessageLoop::current()->Run();
+      waiting_for_result_ = false;
+    }
+    have_result_ = false;  // Auto-reset for next callback.
+    return result_;
+  }
+
+  bool HasResult() const { return have_result_; }
+
+ private:
+  void OnCallback(int net_error, const std::vector<uint8_t>& response_body) {
+    DCHECK(!have_result_);
+    have_result_ = true;
+    result_.net_error = net_error;
+    result_.response_body = response_body;
+    if (waiting_for_result_)
+      base::MessageLoop::current()->Quit();
+  }
+
+  CertNetFetcher::FetchCallback callback_;
+  FetchResult result_;
+  bool have_result_;
+  bool waiting_for_result_;
+};
+
+}  // namespace
+
+class CertNetFetcherTest : public PlatformTest {
+ public:
+  CertNetFetcherTest()
+      : test_server_(SpawnedTestServer::TYPE_HTTP,
+                     net::SpawnedTestServer::kLocalhost,
+                     base::FilePath(kDocRoot)) {}
+
+ protected:
+  SpawnedTestServer test_server_;
+  RequestContext context_;
+};
+
+scoped_ptr<CertNetFetcher::RequestParams> CreateSimpleRequest(const GURL& url) {
+  scoped_ptr<CertNetFetcher::RequestParams> request_params(
+      new CertNetFetcher::RequestParams(
+          url, CertNetFetcher::REQUEST_TYPE_CA_ISSUERS));
+  return request_params;
+}
+
+// Fetch a few unique URLs using GET in parallel. Each URL has different content
+// and Content-Type.
+TEST_F(CertNetFetcherTest, ParallelFetchNoDupes) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+  TestFetchCallback callback1;
+  TestFetchCallback callback2;
+  TestFetchCallback callback3;
+
+  // Request a URL with Content-Type "application/pkix-cert"
+  GURL url1 = test_server_.GetURL("files/cert.crt");
+  fetcher.Fetch(CreateSimpleRequest(url1), callback1.callback());
+
+  // Request a URL with Content-Type "application/pkix-crl"
+  GURL url2 = test_server_.GetURL("files/root.crl");
+  fetcher.Fetch(CreateSimpleRequest(url2), callback2.callback());
+
+  // Request a URL with Content-Type "application/pkcs7-mime"
+  GURL url3 = test_server_.GetURL("files/certs.p7c");
+  fetcher.Fetch(CreateSimpleRequest(url3), callback3.callback());
+
+  // Wait for all of the requests to complete.
+  FetchResult result1 = callback1.WaitForResult();
+  FetchResult result2 = callback2.WaitForResult();
+  FetchResult result3 = callback3.WaitForResult();
+
+  // Verify the fetch results.
+  EXPECT_EQ(OK, result1.net_error);
+  EXPECT_EQ("-cert.crt-\n", result1.GetBodyAsString());
+  EXPECT_EQ(OK, result2.net_error);
+  EXPECT_EQ("-root.crl-\n", result2.GetBodyAsString());
+  EXPECT_EQ(OK, result3.net_error);
+  EXPECT_EQ("-certs.p7c-\n", result3.GetBodyAsString());
+}
+
+// Fetch a caIssuers URL which has an unexpected extension and Content-Type.
+// The extension is .txt and the Content-Type is text/plain. Despite being
+// unusual this succeeds as the extension and Content-Type are not required to
+// be meaningful.
+TEST_F(CertNetFetcherTest, ContentTypeDoesntMatter) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  TestFetchCallback callback;
+  GURL url = test_server_.GetURL("files/foo.txt");
+  fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+  FetchResult result = callback.WaitForResult();
+  EXPECT_EQ(OK, result.net_error);
+  EXPECT_EQ("-foo.txt-\n", result.GetBodyAsString());
+}
+
+// Fetch a URLs whose HTTP response code is not 200. These are considered
+// failures.
+TEST_F(CertNetFetcherTest, HttpStatusCode) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  // Response with a 404.
+  {
+    TestFetchCallback callback;
+    GURL url = test_server_.GetURL("files/404.html");
+    fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+    FetchResult result = callback.WaitForResult();
+    EXPECT_EQ(ERR_FAILED, result.net_error);
+    EXPECT_TRUE(result.response_body.empty());
+  }
+
+  // Response with a 500.
+  {
+    TestFetchCallback callback;
+    GURL url = test_server_.GetURL("files/500.html");
+    fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+    FetchResult result = callback.WaitForResult();
+    EXPECT_EQ(ERR_FAILED, result.net_error);
+    EXPECT_TRUE(result.response_body.empty());
+  }
+}
+
+// Fetching a URL with a Content-Disposition header should have no effect.
+TEST_F(CertNetFetcherTest, ContentDisposition) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  TestFetchCallback callback;
+  GURL url = test_server_.GetURL("files/downloadable.js");
+  fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+  FetchResult result = callback.WaitForResult();
+  EXPECT_EQ(OK, result.net_error);
+  EXPECT_EQ("-downloadable.js-\n", result.GetBodyAsString());
+}
+
+// Verifies that a cachable request will be served from the HTTP cache the
+// second time it is requested.
+TEST_F(CertNetFetcherTest, Cache) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  // Fetch a URL whose HTTP headers make it cacheable for 1 hour.
+  GURL url(test_server_.GetURL("files/cacheable_1hr.crt"));
+  {
+    TestFetchCallback callback;
+    fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+    FetchResult result = callback.WaitForResult();
+    EXPECT_EQ(OK, result.net_error);
+    EXPECT_EQ("-cacheable_1hr.crt-\n", result.GetBodyAsString());
+  }
+
+  // Kill the HTTP server.
+  ASSERT_TRUE(test_server_.Stop());
+
+  // Fetch again -- will fail unless served from cache.
+  {
+    TestFetchCallback callback;
+    fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+    FetchResult result = callback.WaitForResult();
+    EXPECT_EQ(OK, result.net_error);
+    EXPECT_EQ("-cacheable_1hr.crt-\n", result.GetBodyAsString());
+  }
+}
+
+// Verify that the maximum response body constraints are enforced by fetching a
+// resource that is larger than the limit.
+TEST_F(CertNetFetcherTest, TooLarge) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  // This file has a response body 12 bytes long. So setting the maximum to 11
+  // bytes will cause it to fail.
+  GURL url(test_server_.GetURL("files/certs.p7c"));
+  scoped_ptr<CertNetFetcher::RequestParams> params(CreateSimpleRequest(url));
+  params->max_response_size_in_bytes = 11;
+
+  TestFetchCallback callback;
+  fetcher.Fetch(params.Pass(), callback.callback());
+  FetchResult result = callback.WaitForResult();
+  EXPECT_EQ(ERR_FILE_TOO_BIG, result.net_error);
+  EXPECT_TRUE(result.response_body.empty());
+}
+
+// Set the timeout to 10 milliseconds, and try fetching a URL that takes 5
+// seconds to complete. It should fail due to a timeout.
+TEST_F(CertNetFetcherTest, Hang) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  GURL url(test_server_.GetURL("slow/certs.p7c?5.1"));
+  scoped_ptr<CertNetFetcher::RequestParams> params(CreateSimpleRequest(url));
+  params->timeout = base::TimeDelta::FromMilliseconds(10);
+
+  TestFetchCallback callback;
+  fetcher.Fetch(params.Pass(), callback.callback());
+  FetchResult result = callback.WaitForResult();
+  EXPECT_EQ(ERR_TIMED_OUT, result.net_error);
+  EXPECT_TRUE(result.response_body.empty());
+}
+
+// Verify that if a response is gzip-encoded it gets inflated before being
+// returned to the caller.
+TEST_F(CertNetFetcherTest, Gzip) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  GURL url(test_server_.GetURL("files/gzipped_crl"));
+  TestFetchCallback callback;
+  fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+  FetchResult result = callback.WaitForResult();
+  EXPECT_EQ(OK, result.net_error);
+  EXPECT_EQ("-gzipped_crl-\n", result.GetBodyAsString());
+}
+
+// Try fetching an unsupported URL scheme (https).
+TEST_F(CertNetFetcherTest, HttpsNotAllowed) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  GURL url("https://foopy/foo.crt");
+  TestFetchCallback callback;
+  fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+  // Should NOT complete synchronously despite being a test that could be done
+  // immediately.
+  EXPECT_FALSE(callback.HasResult());
+  FetchResult result = callback.WaitForResult();
+  EXPECT_EQ(ERR_DISALLOWED_URL_SCHEME, result.net_error);
+  EXPECT_TRUE(result.response_body.empty());
+}
+
+// Try fetching a URL which redirects to https.
+TEST_F(CertNetFetcherTest, RedirectToHttpsNotAllowed) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  GURL url(test_server_.GetURL("files/redirect_https"));
+  TestFetchCallback callback;
+  fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+  FetchResult result = callback.WaitForResult();
+  EXPECT_EQ(ERR_DISALLOWED_URL_SCHEME, result.net_error);
+  EXPECT_TRUE(result.response_body.empty());
+}
+
+// Try fetching an unsupported URL scheme (https) and then immediately
+// cancelling. This is a bit special because this codepath needs to post a task.
+TEST_F(CertNetFetcherTest, CancelHttpsNotAllowed) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  GURL url("https://foopy/foo.crt");
+  TestFetchCallback callback;
+  CertNetFetcher::RequestId id =
+      fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+
+  // Should NOT complete synchronously despite being a test that could be done
+  // immediately.
+  EXPECT_FALSE(callback.HasResult());
+
+  fetcher.CancelRequest(id);
+}
+
+// Start a few requests, and cancel one of them before running the message loop
+// again.
+TEST_F(CertNetFetcherTest, CancelBeforeRunningMessageLoop) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+  TestFetchCallback callback1;
+  TestFetchCallback callback2;
+  TestFetchCallback callback3;
+
+  // Request a URL with Content-Type "application/pkix-cert"
+  GURL url1 = test_server_.GetURL("files/cert.crt");
+  fetcher.Fetch(CreateSimpleRequest(url1), callback1.callback());
+
+  // Request a URL with Content-Type "application/pkix-crl"
+  GURL url2 = test_server_.GetURL("files/root.crl");
+  CertNetFetcher::RequestId id2 =
+      fetcher.Fetch(CreateSimpleRequest(url2), callback2.callback());
+
+  // Request a URL with Content-Type "application/pkcs7-mime"
+  GURL url3 = test_server_.GetURL("files/certs.p7c");
+  fetcher.Fetch(CreateSimpleRequest(url3), callback3.callback());
+
+  EXPECT_FALSE(callback1.HasResult());
+  EXPECT_FALSE(callback2.HasResult());
+  EXPECT_FALSE(callback3.HasResult());
+
+  // Cancel the second request.
+  fetcher.CancelRequest(id2);
+
+  // Wait for the non-cancelled requests to complete.
+  FetchResult result1 = callback1.WaitForResult();
+  FetchResult result3 = callback3.WaitForResult();
+
+  // Verify the fetch results.
+  EXPECT_EQ(OK, result1.net_error);
+  EXPECT_EQ("-cert.crt-\n", result1.GetBodyAsString());
+  EXPECT_EQ(OK, result3.net_error);
+  EXPECT_EQ("-certs.p7c-\n", result3.GetBodyAsString());
+
+  EXPECT_FALSE(callback2.HasResult());
+}
+
+// Start several requests, and cancel one of them after the first has completed.
+TEST_F(CertNetFetcherTest, CancelSlowRequest) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+  TestFetchCallback callback1;
+  TestFetchCallback callback2;
+  TestFetchCallback callback3;
+  TestFetchCallback callback4;
+
+  // Request a URL with Content-Type "application/pkix-cert"
+  GURL url1 = test_server_.GetURL("files/cert.crt");
+  fetcher.Fetch(CreateSimpleRequest(url1), callback1.callback());
+
+  // This request will take 10 seconds to complete.
+  GURL url2 = test_server_.GetURL("slow/certs.p7c?10.1");
+  CertNetFetcher::RequestId id2 =
+      fetcher.Fetch(CreateSimpleRequest(url2), callback2.callback());
+
+  // Request a URL with Content-Type "application/pkcs7-mime"
+  GURL url3 = test_server_.GetURL("files/certs.p7c");
+  fetcher.Fetch(CreateSimpleRequest(url3), callback3.callback());
+
+  // Request a URL with Content-Type "application/pkcs7-mime"
+  GURL url4("ftp://www.not.supported.com/foo");
+  fetcher.Fetch(CreateSimpleRequest(url4), callback4.callback());
+
+  EXPECT_FALSE(callback1.HasResult());
+  EXPECT_FALSE(callback2.HasResult());
+  EXPECT_FALSE(callback3.HasResult());
+  EXPECT_FALSE(callback4.HasResult());
+
+  // Wait for the fast request to complete.
+  FetchResult result4 = callback4.WaitForResult();
+  EXPECT_EQ(ERR_DISALLOWED_URL_SCHEME, result4.net_error);
+  EXPECT_TRUE(result4.response_body.empty());
+
+  // Cancel the second request.
+  fetcher.CancelRequest(id2);
+
+  // Wait for the other requests to complete.
+  FetchResult result1 = callback1.WaitForResult();
+  FetchResult result3 = callback3.WaitForResult();
+
+  // Verify the fetch results.
+  EXPECT_EQ(OK, result1.net_error);
+  EXPECT_EQ("-cert.crt-\n", result1.GetBodyAsString());
+  EXPECT_EQ(OK, result3.net_error);
+  EXPECT_EQ("-certs.p7c-\n", result3.GetBodyAsString());
+
+  EXPECT_FALSE(callback2.HasResult());
+}
+
+// Delete a CertNetFetcher with outstanding requests on it.
+TEST_F(CertNetFetcherTest, DeleteCancels) {
+  ASSERT_TRUE(test_server_.Start());
+
+  CertNetFetcher fetcher(&context_);
+
+  GURL url(test_server_.GetURL("slow/certs.p7c?20.1"));
+  TestFetchCallback callback;
+  fetcher.Fetch(CreateSimpleRequest(url), callback.callback());
+
+  // Note that the request is never completed, nor cancelled.
+}
+
+}  // namespace net