netwerk/base/SimpleChannel.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "SimpleChannel.h"
   7
   8 #include "nsBaseChannel.h"
   9 #include "nsIChannel.h"
  10 #include "nsIChildChannel.h"
  11 #include "nsICancelable.h"
  12 #include "nsIInputStream.h"
  13 #include "nsIRequest.h"
  14 #include "nsISupportsImpl.h"
  15 #include "nsNetUtil.h"
  16
  17 #include "mozilla/Try.h"
  18 #include "mozilla/Unused.h"
  19 #include "mozilla/dom/ContentChild.h"
  20 #include "mozilla/net/NeckoChild.h"
  21 #include "mozilla/net/PSimpleChannelChild.h"
  22
  23 namespace mozilla {
  24 namespace net {
  25
  26 SimpleChannel::SimpleChannel(UniquePtr<SimpleChannelCallbacks>&& aCallbacks)
  27     : mCallbacks(std::move(aCallbacks)) {
  28   EnableSynthesizedProgressEvents(true);
  29 }
  30
  31 nsresult SimpleChannel::OpenContentStream(bool async,
  32                                           nsIInputStream** streamOut,
  33                                           nsIChannel** channel) {
  34   NS_ENSURE_TRUE(mCallbacks, NS_ERROR_UNEXPECTED);
  35
  36   nsCOMPtr<nsIInputStream> stream;
  37   MOZ_TRY_VAR(stream, mCallbacks->OpenContentStream(async, this));
  38   MOZ_ASSERT(stream);
  39
  40   mCallbacks = nullptr;
  41
  42   *channel = nullptr;
  43   stream.forget(streamOut);
  44   return NS_OK;
  45 }
  46
  47 nsresult SimpleChannel::BeginAsyncRead(nsIStreamListener* listener,
  48                                        nsIRequest** request,
  49                                        nsICancelable** cancelableRequest) {
  50   NS_ENSURE_TRUE(mCallbacks, NS_ERROR_UNEXPECTED);
  51
  52   RequestOrReason res = mCallbacks->StartAsyncRead(listener, this);
  53
  54   if (res.isErr()) {
  55     return res.propagateErr();
  56   }
  57
  58   mCallbacks = nullptr;
  59
  60   RequestOrCancelable value = res.unwrap();
  61
  62   if (value.is<NotNullRequest>()) {
  63     nsCOMPtr<nsIRequest> req = value.as<NotNullRequest>().get();
  64     req.forget(request);
  65   } else if (value.is<NotNullCancelable>()) {
  66     nsCOMPtr<nsICancelable> cancelable = value.as<NotNullCancelable>().get();
  67     cancelable.forget(cancelableRequest);
  68   } else {
  69     MOZ_ASSERT_UNREACHABLE(
  70         "StartAsyncRead didn't return a NotNull nsIRequest or nsICancelable.");
  71     return NS_ERROR_UNEXPECTED;
  72   }
  73
  74   return NS_OK;
  75 }
  76
  77 NS_IMPL_ISUPPORTS_INHERITED(SimpleChannelChild, SimpleChannel, nsIChildChannel)
  78
  79 SimpleChannelChild::SimpleChannelChild(
  80     UniquePtr<SimpleChannelCallbacks>&& aCallbacks)
  81     : SimpleChannel(std::move(aCallbacks)) {}
  82
  83 NS_IMETHODIMP
  84 SimpleChannelChild::ConnectParent(uint32_t aId) {
  85   MOZ_ASSERT(NS_IsMainThread());
  86   mozilla::dom::ContentChild* cc =
  87       static_cast<mozilla::dom::ContentChild*>(gNeckoChild->Manager());
  88   if (cc->IsShuttingDown()) {
  89     return NS_ERROR_FAILURE;
  90   }
  91
  92   // Reference freed in DeallocPSimpleChannelChild.
  93   if (!gNeckoChild->SendPSimpleChannelConstructor(do_AddRef(this).take(),
  94                                                   aId)) {
  95     return NS_ERROR_FAILURE;
  96   }
  97
  98   return NS_OK;
  99 }
 100
 101 NS_IMETHODIMP
 102 SimpleChannelChild::CompleteRedirectSetup(nsIStreamListener* aListener) {
 103   if (CanSend()) {
 104     MOZ_ASSERT(NS_IsMainThread());
 105   }
 106
 107   nsresult rv;
 108   rv = AsyncOpen(aListener);
 109   if (NS_WARN_IF(NS_FAILED(rv))) {
 110     return rv;
 111   }
 112
 113   if (CanSend()) {
 114     Unused << Send__delete__(this);
 115   }
 116   return NS_OK;
 117 }
 118
 119 already_AddRefed<nsIChannel> NS_NewSimpleChannelInternal(
 120     nsIURI* aURI, nsILoadInfo* aLoadInfo,
 121     UniquePtr<SimpleChannelCallbacks>&& aCallbacks) {
 122   RefPtr<SimpleChannel> chan;
 123   if (IsNeckoChild()) {
 124     chan = new SimpleChannelChild(std::move(aCallbacks));
 125   } else {
 126     chan = new SimpleChannel(std::move(aCallbacks));
 127   }
 128
 129   chan->SetURI(aURI);
 130
 131   MOZ_ALWAYS_SUCCEEDS(chan->SetLoadInfo(aLoadInfo));
 132
 133   return chan.forget();
 134 }
 135
 136 }  // namespace net
 137 }  // namespace mozilla