Add m-esr52 at 52.6.0

1 files changed, 186 insertions, 0 deletions

diff --git a/netwerk/base/ReferrerPolicy.h b/netwerk/base/ReferrerPolicy.h
new file mode 100644
index 000000000..591b9daf0
--- /dev/null
+++ b/netwerk/base/ReferrerPolicy.h
@@ -0,0 +1,186 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef ReferrerPolicy_h__
+#define ReferrerPolicy_h__
+
+#include "nsStringGlue.h"
+#include "nsIHttpChannel.h"
+#include "nsUnicharUtils.h"
+
+namespace mozilla { namespace net {
+
+enum ReferrerPolicy {
+  /* spec tokens: never no-referrer */
+  RP_No_Referrer                 = nsIHttpChannel::REFERRER_POLICY_NO_REFERRER,
+
+  /* spec tokens: origin */
+  RP_Origin                      = nsIHttpChannel::REFERRER_POLICY_ORIGIN,
+
+  /* spec tokens: default no-referrer-when-downgrade */
+  RP_No_Referrer_When_Downgrade  = nsIHttpChannel::REFERRER_POLICY_NO_REFERRER_WHEN_DOWNGRADE,
+  RP_Default                     = nsIHttpChannel::REFERRER_POLICY_DEFAULT,
+
+  /* spec tokens: origin-when-cross-origin */
+  RP_Origin_When_Crossorigin     = nsIHttpChannel::REFERRER_POLICY_ORIGIN_WHEN_XORIGIN,
+
+  /* spec tokens: always unsafe-url */
+  RP_Unsafe_URL                  = nsIHttpChannel::REFERRER_POLICY_UNSAFE_URL,
+
+  /* spec tokens: same-origin */
+  RP_Same_Origin                = nsIHttpChannel::REFERRER_POLICY_SAME_ORIGIN,
+
+  /* spec tokens: strict-origin */
+  RP_Strict_Origin               = nsIHttpChannel::REFERRER_POLICY_STRICT_ORIGIN,
+
+  /* spec tokens: strict-origin-when-cross-origin */
+  RP_Strict_Origin_When_Cross_Origin = nsIHttpChannel::REFERRER_POLICY_STRICT_ORIGIN_WHEN_XORIGIN,
+
+  /* spec tokens: empty string */
+  /* The empty string "" corresponds to no referrer policy, or unset policy */
+  RP_Unset                       = nsIHttpChannel::REFERRER_POLICY_UNSET,
+};
+
+/* spec tokens: never no-referrer */
+const char kRPS_Never[]                       = "never";
+const char kRPS_No_Referrer[]                 = "no-referrer";
+
+/* spec tokens: origin */
+const char kRPS_Origin[]                      = "origin";
+
+/* spec tokens: default no-referrer-when-downgrade */
+const char kRPS_Default[]                     = "default";
+const char kRPS_No_Referrer_When_Downgrade[]  = "no-referrer-when-downgrade";
+
+/* spec tokens: origin-when-cross-origin */
+const char kRPS_Origin_When_Cross_Origin[]    = "origin-when-cross-origin";
+const char kRPS_Origin_When_Crossorigin[]     = "origin-when-crossorigin";
+
+/* spec tokens: same-origin */
+const char kRPS_Same_Origin[]                 = "same-origin";
+
+/* spec tokens: strict-origin */
+const char kRPS_Strict_Origin[]               = "strict-origin";
+
+/* spec tokens: strict-origin-when-cross-origin */
+const char kRPS_Strict_Origin_When_Cross_Origin[] = "strict-origin-when-cross-origin";
+
+/* spec tokens: always unsafe-url */
+const char kRPS_Always[]                      = "always";
+const char kRPS_Unsafe_URL[]                  = "unsafe-url";
+
+inline ReferrerPolicy
+ReferrerPolicyFromString(const nsAString& content)
+{
+  if (content.IsEmpty()) {
+    return RP_No_Referrer;
+  }
+
+  nsString lowerContent(content);
+  ToLowerCase(lowerContent);
+  // This is implemented step by step as described in the Referrer Policy
+  // specification, section "Determine token's Policy".
+  if (lowerContent.EqualsLiteral(kRPS_Never) ||
+      lowerContent.EqualsLiteral(kRPS_No_Referrer)) {
+    return RP_No_Referrer;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Origin)) {
+    return RP_Origin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Default) ||
+      lowerContent.EqualsLiteral(kRPS_No_Referrer_When_Downgrade)) {
+    return RP_No_Referrer_When_Downgrade;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Origin_When_Cross_Origin) ||
+      lowerContent.EqualsLiteral(kRPS_Origin_When_Crossorigin)) {
+    return RP_Origin_When_Crossorigin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Same_Origin)) {
+    return RP_Same_Origin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Strict_Origin)) {
+    return RP_Strict_Origin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Strict_Origin_When_Cross_Origin)) {
+    return RP_Strict_Origin_When_Cross_Origin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Always) ||
+      lowerContent.EqualsLiteral(kRPS_Unsafe_URL)) {
+    return RP_Unsafe_URL;
+  }
+  // Spec says if none of the previous match, use empty string.
+  return RP_Unset;
+
+}
+
+inline bool
+IsValidReferrerPolicy(const nsAString& content)
+{
+  if (content.IsEmpty()) {
+    return true;
+  }
+
+  nsString lowerContent(content);
+  ToLowerCase(lowerContent);
+
+  return lowerContent.EqualsLiteral(kRPS_Never)
+      || lowerContent.EqualsLiteral(kRPS_No_Referrer)
+      || lowerContent.EqualsLiteral(kRPS_Origin)
+      || lowerContent.EqualsLiteral(kRPS_Default)
+      || lowerContent.EqualsLiteral(kRPS_No_Referrer_When_Downgrade)
+      || lowerContent.EqualsLiteral(kRPS_Origin_When_Cross_Origin)
+      || lowerContent.EqualsLiteral(kRPS_Origin_When_Crossorigin)
+      || lowerContent.EqualsLiteral(kRPS_Same_Origin)
+      || lowerContent.EqualsLiteral(kRPS_Strict_Origin)
+      || lowerContent.EqualsLiteral(kRPS_Strict_Origin_When_Cross_Origin)
+      || lowerContent.EqualsLiteral(kRPS_Always)
+      || lowerContent.EqualsLiteral(kRPS_Unsafe_URL);
+}
+
+inline ReferrerPolicy
+AttributeReferrerPolicyFromString(const nsAString& content)
+{
+  // Specs : https://html.spec.whatwg.org/multipage/infrastructure.html#referrer-policy-attribute
+  // Spec says the empty string "" corresponds to no referrer policy, or RP_Unset
+  if (content.IsEmpty()) {
+    return RP_Unset;
+  }
+
+  nsString lowerContent(content);
+  ToLowerCase(lowerContent);
+
+  if (lowerContent.EqualsLiteral(kRPS_No_Referrer)) {
+    return RP_No_Referrer;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Origin)) {
+    return RP_Origin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_No_Referrer_When_Downgrade)) {
+    return RP_No_Referrer_When_Downgrade;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Origin_When_Cross_Origin)) {
+    return RP_Origin_When_Crossorigin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Unsafe_URL)) {
+    return RP_Unsafe_URL;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Strict_Origin)) {
+    return RP_Strict_Origin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Same_Origin)) {
+    return RP_Same_Origin;
+  }
+  if (lowerContent.EqualsLiteral(kRPS_Strict_Origin_When_Cross_Origin)) {
+    return RP_Strict_Origin_When_Cross_Origin;
+  }
+
+  // Spec says invalid value default is empty string state
+  // So, return RP_Unset if none of the previous match, return RP_Unset
+  return RP_Unset;
+}
+
+} // namespace net
+} // namespace mozilla
+
+#endif