1 files changed, 45 insertions, 0 deletions
diff --git a/netwerk/base/ContentRange.h b/netwerk/base/ContentRange.h
new file mode 100644
index 0000000000..36b15214eb
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+++ b/netwerk/base/ContentRange.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set et cin ts=4 sw=2 sts=2: */
+/* 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 ContentRange_h__
+#define ContentRange_h__
+
+#include "mozilla/Maybe.h"
+#include "nsString.h"
+#include "nsISupportsImpl.h"
+
+// nsIBaseChannel subclasses may support range headers when accessed via
+// Fetch or XMLHTTPRequest, even if they are not HTTP assets and so do not
+// normally have access to headers (such as the blob URLs). The ContentRange
+// class helps to encapsulate much of the common logic involved in parsing,
+// storing, validating, and writing out Content-Range headers.
+
+namespace mozilla::net {
+
+class ContentRange {
+ private:
+  ~ContentRange() = default;
+
+  uint64_t mStart{0};
+  uint64_t mEnd{0};
+  uint64_t mSize{0};
+
+ public:
+  uint64_t Start() const { return mStart; }
+  uint64_t End() const { return mEnd; }
+  uint64_t Size() const { return mSize; }
+  bool IsValid() const { return mStart < mSize; }
+  ContentRange(uint64_t aStart, uint64_t aEnd, uint64_t aSize)
+      : mStart(aStart), mEnd(aEnd), mSize(aSize) {}
+  ContentRange(const nsACString& aRangeHeader, uint64_t aSize);
+  void AsHeader(nsACString& aOutString) const;
+
+  NS_INLINE_DECL_REFCOUNTING(ContentRange)
+};
+
+}  // namespace mozilla::net
+
+#endif  // ContentRange_h__