mapped_host_resolver.cc 3.2 KB

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  1. // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4. #include "net/dns/mapped_host_resolver.h"
  5. #include <string>
  6. #include <utility>
  7. #include "base/strings/string_util.h"
  8. #include "base/values.h"
  9. #include "net/base/host_port_pair.h"
  10. #include "net/base/net_errors.h"
  11. #include "net/base/network_isolation_key.h"
  12. #include "net/base/url_util.h"
  13. #include "net/dns/host_resolver.h"
  14. #include "net/log/net_log_with_source.h"
  15. #include "third_party/abseil-cpp/absl/types/optional.h"
  16. #include "url/gurl.h"
  17. #include "url/scheme_host_port.h"
  18. #include "url/url_canon.h"
  19. namespace net {
  20. MappedHostResolver::MappedHostResolver(std::unique_ptr<HostResolver> impl)
  21. : impl_(std::move(impl)) {}
  22. MappedHostResolver::~MappedHostResolver() = default;
  23. void MappedHostResolver::OnShutdown() {
  24. impl_->OnShutdown();
  25. }
  26. std::unique_ptr<HostResolver::ResolveHostRequest>
  27. MappedHostResolver::CreateRequest(
  28. url::SchemeHostPort host,
  29. NetworkIsolationKey network_isolation_key,
  30. NetLogWithSource source_net_log,
  31. absl::optional<ResolveHostParameters> optional_parameters) {
  32. GURL rewritten_url = host.GetURL();
  33. HostMappingRules::RewriteResult result = rules_.RewriteUrl(rewritten_url);
  34. switch (result) {
  35. case HostMappingRules::RewriteResult::kRewritten:
  36. DCHECK(rewritten_url.is_valid());
  37. DCHECK_NE(rewritten_url.host_piece(), "~NOTFOUND");
  38. return impl_->CreateRequest(
  39. url::SchemeHostPort(rewritten_url), std::move(network_isolation_key),
  40. std::move(source_net_log), std::move(optional_parameters));
  41. case HostMappingRules::RewriteResult::kInvalidRewrite:
  42. // Treat any invalid mapping as if it was "~NOTFOUND" (which should itself
  43. // result in `kInvalidRewrite`).
  44. return CreateFailingRequest(ERR_NAME_NOT_RESOLVED);
  45. case HostMappingRules::RewriteResult::kNoMatchingRule:
  46. return impl_->CreateRequest(
  47. std::move(host), std::move(network_isolation_key),
  48. std::move(source_net_log), std::move(optional_parameters));
  49. }
  50. }
  51. std::unique_ptr<HostResolver::ResolveHostRequest>
  52. MappedHostResolver::CreateRequest(
  53. const HostPortPair& host,
  54. const NetworkIsolationKey& network_isolation_key,
  55. const NetLogWithSource& source_net_log,
  56. const absl::optional<ResolveHostParameters>& optional_parameters) {
  57. HostPortPair rewritten = host;
  58. rules_.RewriteHost(&rewritten);
  59. if (rewritten.host() == "~NOTFOUND")
  60. return CreateFailingRequest(ERR_NAME_NOT_RESOLVED);
  61. return impl_->CreateRequest(rewritten, network_isolation_key, source_net_log,
  62. optional_parameters);
  63. }
  64. std::unique_ptr<HostResolver::ProbeRequest>
  65. MappedHostResolver::CreateDohProbeRequest() {
  66. return impl_->CreateDohProbeRequest();
  67. }
  68. HostCache* MappedHostResolver::GetHostCache() {
  69. return impl_->GetHostCache();
  70. }
  71. base::Value MappedHostResolver::GetDnsConfigAsValue() const {
  72. return impl_->GetDnsConfigAsValue();
  73. }
  74. void MappedHostResolver::SetRequestContext(URLRequestContext* request_context) {
  75. impl_->SetRequestContext(request_context);
  76. }
  77. HostResolverManager* MappedHostResolver::GetManagerForTesting() {
  78. return impl_->GetManagerForTesting();
  79. }
  80. } // namespace net