/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 mozilla_dom_FetchUtil_h
#define mozilla_dom_FetchUtil_h

#include "nsString.h"
#include "nsError.h"

#include "mozilla/ErrorResult.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/FormData.h"

class nsIPrincipal;
class nsIDocument;
class nsIHttpChannel;

namespace mozilla {
namespace dom {

class InternalRequest;

namespace workers {
class WorkerPrivate;
}

class FetchUtil final
{
private:
  FetchUtil() = delete;

public:
  /**
  * Sets outMethod to a valid HTTP request method string based on an input method.
  * Implements checks and normalization as specified by the Fetch specification.
  * Returns NS_ERROR_DOM_SECURITY_ERR if the method is invalid.
  * Otherwise returns NS_OK and the normalized method via outMethod.
  */
  static nsresult
  GetValidRequestMethod(const nsACString& aMethod, nsCString& outMethod);

  /**
   * Extracts an HTTP header from a substring range.
   */
  static bool
  ExtractHeader(nsACString::const_iterator& aStart,
                nsACString::const_iterator& aEnd,
                nsCString& aHeaderName,
                nsCString& aHeaderValue,
                bool* aWasEmptyHeader);

  static nsresult
  SetRequestReferrer(nsIPrincipal* aPrincipal,
                     nsIDocument* aDoc,
                     nsIHttpChannel* aChannel,
                     InternalRequest* aRequest);

  /**
   * Check that the given object is a Response and, if so, stream to the given
   * JS consumer. On any failure, this function will report an error on the
   * given JSContext before returning false. If executing in a worker, the
   * WorkerPrivate must be given.
   */
  static bool
  StreamResponseToJS(JSContext* aCx,
                     JS::HandleObject aObj,
                     JS::MimeType aMimeType,
                     JS::StreamConsumer* aConsumer,
                     workers::WorkerPrivate* aMaybeWorker);
};

} // namespace dom
} // namespace mozilla
#endif