Change QuicMemoryCacheBackend::InitializeDirectory() to handle cases where the
specified directory contains only files, not subdirectories naming
hosts.

gfe-relnote: n/a - tools only

https://bugs.chromium.org/p/chromium/issues/detail?id=1034470

PiperOrigin-RevId: 285875350
Change-Id: I352d71066f37d9a02280633ad439ad784c2531f2

quic/tools/quic_memory_cache_backend.cc

diff --git a/quic/tools/quic_memory_cache_backend.cc b/quic/tools/quic_memory_cache_backend.cc
index ddf94fe..c7ac912 100644
--- a/quic/tools/quic_memory_cache_backend.cc
+++ b/quic/tools/quic_memory_cache_backend.cc
@@ -106,7 +106,12 @@
     quiche::QuicheStringPiece base) {
   DCHECK(base[0] != '/') << base;
   size_t path_start = base.find_first_of('/');
-  DCHECK(path_start != quiche::QuicheStringPiece::npos) << base;
+  if (path_start == quiche::QuicheStringPiece::npos) {
+    host_ = std::string(base);
+    path_ = "";
+    return;
+  }
+
   host_ = std::string(base.substr(0, path_start));
   size_t query_start = base.find_first_of(',');
   if (query_start > 0) {

quic/tools/quic_memory_cache_backend_test.cc

diff --git a/quic/tools/quic_memory_cache_backend_test.cc b/quic/tools/quic_memory_cache_backend_test.cc
index c028e41..e4b8d8e 100644
--- a/quic/tools/quic_memory_cache_backend_test.cc
+++ b/quic/tools/quic_memory_cache_backend_test.cc
@@ -4,6 +4,7 @@
 
 #include "net/third_party/quiche/src/quic/tools/quic_memory_cache_backend.h"
 
+#include "net/third_party/quiche/src/quic/platform/api/quic_file_utils.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_map_util.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
 #include "net/third_party/quiche/src/quic/tools/quic_backend_response.h"
@@ -115,6 +116,32 @@
   EXPECT_LT(0U, response->body().length());
 }
 
+TEST_F(QuicMemoryCacheBackendTest, UsesOriginalUrlOnly) {
+  // Tests that if the URL cannot be inferred correctly from the path
+  // because the directory does not include the hostname, that the
+  // X-Original-Url header's value will be used.
+  std::string dir;
+  std::string path = "map.html";
+  for (const std::string& file : ReadFileContents(CacheDirectory())) {
+    if (quiche::QuicheTextUtils::EndsWithIgnoreCase(file, "map.html")) {
+      dir = file;
+      dir.erase(dir.length() - path.length() - 1);
+      break;
+    }
+  }
+  ASSERT_NE("", dir);
+
+  cache_.InitializeBackend(dir);
+  const Response* response =
+      cache_.GetResponse("test.example.com", "/site_map.html");
+  ASSERT_TRUE(response);
+  ASSERT_TRUE(QuicContainsKey(response->headers(), ":status"));
+  EXPECT_EQ("200", response->headers().find(":status")->second);
+  // Connection headers are not valid in HTTP/2.
+  EXPECT_FALSE(QuicContainsKey(response->headers(), "connection"));
+  EXPECT_LT(0U, response->body().length());
+}
+
 TEST_F(QuicMemoryCacheBackendTest, DefaultResponse) {
   // Verify GetResponse returns nullptr when no default is set.
   const Response* response = cache_.GetResponse("www.google.com", "/");