net: Avoid recursion in URLRequestJob::ReadFilteredData.

net/url_request/url_request_job_unittest.cc

 // Copyright (c) 2012 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/url_request/url_request_job.h"
 
 #include "base/run_loop.h"
 #include "net/base/request_priority.h"
 #include "net/http/http_transaction_unittest.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
 namespace {
 
 // This is a header that signals the end of the data.
-const char kGzipGata[] = "\x1f\x08b\x08\0\0\0\0\0\0\3\3\0\0\0\0\0\0\0\0";
+const char kGzipData[] = "\x1f\x08b\x08\0\0\0\0\0\0\3\3\0\0\0\0\0\0\0\0";
+const char kGzipDataWithName[] =
+    "\x1f\x08b\x08\x08\0\0\0\0\0\0name\0\3\0\0\0\0\0\0\0\0";
 
 void GZipServer(const HttpRequestInfo* request,
                 std::string* response_status,
                 std::string* response_headers,
                 std::string* response_data) {
-  response_data->assign(kGzipGata, sizeof(kGzipGata));
+  response_data->assign(kGzipData, sizeof(kGzipData));
+}
+
+void BigGZipServer(const HttpRequestInfo* request,
+                   std::string* response_status,
+                   std::string* response_headers,
+                   std::string* response_data) {
+  response_data->assign(kGzipDataWithName, sizeof(kGzipDataWithName));
+  response_data->insert(10, 64 * 1024, 'a');
 }
 
 const MockTransaction kGZip_Transaction = {
     "http://www.google.com/gzyp",
     "GET",
     base::Time(),
     "",
     LOAD_NORMAL,
     "HTTP/1.1 200 OK",
     "Cache-Control: max-age=10000\n"
@@ skipping 62 matching lines @@
   req.set_method("GET");
   req.Start();
 
   base::RunLoop().Run();
 
   EXPECT_TRUE(network_layer.done_reading_called());
 
   RemoveMockTransaction(&transaction);
 }
 
+// Tests processing a large gzip header one byte at a time.
+TEST(URLRequestJob, SyncSlowTransaction) {
+  MockNetworkLayer network_layer;
+  TestURLRequestContext context;
+  context.set_http_transaction_factory(&network_layer);
+
+  TestDelegate d;
+  TestURLRequest req(
+      GURL(kGZip_Transaction.url), DEFAULT_PRIORITY, &d, &context);
+  MockTransaction transaction(kGZip_Transaction);
+  transaction.test_mode = TEST_MODE_SYNC_ALL | TEST_MODE_SLOW_READ;
+  transaction.handler = &BigGZipServer;
+  AddMockTransaction(&transaction);
+
+  req.set_method("GET");
+  req.Start();
+
+  base::RunLoop().Run();
+
+  EXPECT_TRUE(network_layer.done_reading_called());
+
+  RemoveMockTransaction(&transaction);
+}
+
 TEST(URLRequestJob, RedirectTransactionNotifiedWhenDone) {
   MockNetworkLayer network_layer;
   TestURLRequestContext context;
   context.set_http_transaction_factory(&network_layer);
 
   TestDelegate d;
   TestURLRequest req(
       GURL(kRedirect_Transaction.url), DEFAULT_PRIORITY, &d, &context);
   AddMockTransaction(&kRedirect_Transaction);
 
@@ skipping 24 matching lines @@
   req.Start();
 
   base::RunLoop().Run();
 
   EXPECT_TRUE(network_layer.stop_caching_called());
 
   RemoveMockTransaction(&kGZip_Transaction);
 }
 
 }  // namespace net