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