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