third_party/WebKit/Source/core/fileapi/URLFileAPI.cpp

// Copyright 2016 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 "core/fileapi/URLFileAPI.h"

#include "bindings/core/v8/ExceptionState.h"
#include "bindings/core/v8/ScriptState.h"
#include "core/dom/DOMURL.h"
#include "core/dom/ExecutionContext.h"
#include "core/fileapi/Blob.h"
#include "core/frame/UseCounter.h"
#include "core/html/PublicURLManager.h"

namespace blink {

// static
String URLFileAPI::createObjectURL(ScriptState* scriptState,
                                   Blob* blob,
                                   ExceptionState& exceptionState) {
  DCHECK(blob);
  ExecutionContext* executionContext = scriptState->getExecutionContext();
  DCHECK(executionContext);

  if (blob->isClosed()) {
    // TODO(jsbell): The spec doesn't throw, but rather returns a blob: URL
    // without adding it to the store.
    exceptionState.throwDOMException(
        InvalidStateError,
        String(blob->isFile() ? "File" : "Blob") + " has been closed.");
    return String();
  }

  UseCounter::count(executionContext, UseCounter::CreateObjectURLBlob);
  return DOMURL::createPublicURL(executionContext, blob, blob->uuid());
}

// static
void URLFileAPI::revokeObjectURL(ScriptState* scriptState,
                                 const String& urlString) {
  ExecutionContext* executionContext = scriptState->getExecutionContext();
  DCHECK(executionContext);

  KURL url(KURL(), urlString);
  executionContext->removeURLFromMemoryCache(url);
  executionContext->publicURLManager().revoke(url);
}

}  // namespace blink