netwerk/base/src/nsStreamLoader.cpp@6474c204b198 (annotated)
netwerk/base/src/nsStreamLoader.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "nsStreamLoader.h" |
| michael@0 | 7 | #include "nsIInputStream.h" |
| michael@0 | 8 | #include "nsIChannel.h" |
| michael@0 | 9 | #include "nsError.h" |
| michael@0 | 10 | #include "GeckoProfiler.h" |
| michael@0 | 11 | |
| michael@0 | 12 | nsStreamLoader::nsStreamLoader() |
| michael@0 | 13 | : mData(nullptr), |
| michael@0 | 14 | mAllocated(0), |
| michael@0 | 15 | mLength(0) |
| michael@0 | 16 | { |
| michael@0 | 17 | } |
| michael@0 | 18 | |
| michael@0 | 19 | nsStreamLoader::~nsStreamLoader() |
| michael@0 | 20 | { |
| michael@0 | 21 | ReleaseData(); |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | NS_IMETHODIMP |
| michael@0 | 25 | nsStreamLoader::Init(nsIStreamLoaderObserver* observer) |
| michael@0 | 26 | { |
| michael@0 | 27 | NS_ENSURE_ARG_POINTER(observer); |
| michael@0 | 28 | mObserver = observer; |
| michael@0 | 29 | return NS_OK; |
| michael@0 | 30 | } |
| michael@0 | 31 | |
| michael@0 | 32 | nsresult |
| michael@0 | 33 | nsStreamLoader::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult) |
| michael@0 | 34 | { |
| michael@0 | 35 | if (aOuter) return NS_ERROR_NO_AGGREGATION; |
| michael@0 | 36 | |
| michael@0 | 37 | nsStreamLoader* it = new nsStreamLoader(); |
| michael@0 | 38 | if (it == nullptr) |
| michael@0 | 39 | return NS_ERROR_OUT_OF_MEMORY; |
| michael@0 | 40 | NS_ADDREF(it); |
| michael@0 | 41 | nsresult rv = it->QueryInterface(aIID, aResult); |
| michael@0 | 42 | NS_RELEASE(it); |
| michael@0 | 43 | return rv; |
| michael@0 | 44 | } |
| michael@0 | 45 | |
| michael@0 | 46 | NS_IMPL_ISUPPORTS(nsStreamLoader, nsIStreamLoader, |
| michael@0 | 47 | nsIRequestObserver, nsIStreamListener) |
| michael@0 | 48 | |
| michael@0 | 49 | NS_IMETHODIMP |
| michael@0 | 50 | nsStreamLoader::GetNumBytesRead(uint32_t* aNumBytes) |
| michael@0 | 51 | { |
| michael@0 | 52 | *aNumBytes = mLength; |
| michael@0 | 53 | return NS_OK; |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | /* readonly attribute nsIRequest request; */ |
| michael@0 | 57 | NS_IMETHODIMP |
| michael@0 | 58 | nsStreamLoader::GetRequest(nsIRequest **aRequest) |
| michael@0 | 59 | { |
| michael@0 | 60 | NS_IF_ADDREF(*aRequest = mRequest); |
| michael@0 | 61 | return NS_OK; |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | NS_IMETHODIMP |
| michael@0 | 65 | nsStreamLoader::OnStartRequest(nsIRequest* request, nsISupports *ctxt) |
| michael@0 | 66 | { |
| michael@0 | 67 | nsCOMPtr<nsIChannel> chan( do_QueryInterface(request) ); |
| michael@0 | 68 | if (chan) { |
| michael@0 | 69 | int64_t contentLength = -1; |
| michael@0 | 70 | chan->GetContentLength(&contentLength); |
| michael@0 | 71 | if (contentLength >= 0) { |
| michael@0 | 72 | if (contentLength > UINT32_MAX) { |
| michael@0 | 73 | // Too big to fit into uint32, so let's bail. |
| michael@0 | 74 | // XXX we should really make mAllocated and mLength 64-bit instead. |
| michael@0 | 75 | return NS_ERROR_OUT_OF_MEMORY; |
| michael@0 | 76 | } |
| michael@0 | 77 | uint32_t contentLength32 = uint32_t(contentLength); |
| michael@0 | 78 | // preallocate buffer |
| michael@0 | 79 | mData = static_cast<uint8_t*>(moz_malloc(contentLength32)); |
| michael@0 | 80 | if (!mData) { |
| michael@0 | 81 | return NS_ERROR_OUT_OF_MEMORY; |
| michael@0 | 82 | } |
| michael@0 | 83 | mAllocated = contentLength32; |
| michael@0 | 84 | } |
| michael@0 | 85 | } |
| michael@0 | 86 | mContext = ctxt; |
| michael@0 | 87 | return NS_OK; |
| michael@0 | 88 | } |
| michael@0 | 89 | |
| michael@0 | 90 | NS_IMETHODIMP |
| michael@0 | 91 | nsStreamLoader::OnStopRequest(nsIRequest* request, nsISupports *ctxt, |
| michael@0 | 92 | nsresult aStatus) |
| michael@0 | 93 | { |
| michael@0 | 94 | PROFILER_LABEL("network", "nsStreamLoader::OnStopRequest"); |
| michael@0 | 95 | if (mObserver) { |
| michael@0 | 96 | // provide nsIStreamLoader::request during call to OnStreamComplete |
| michael@0 | 97 | mRequest = request; |
| michael@0 | 98 | nsresult rv = mObserver->OnStreamComplete(this, mContext, aStatus, |
| michael@0 | 99 | mLength, mData); |
| michael@0 | 100 | if (rv == NS_SUCCESS_ADOPTED_DATA) { |
| michael@0 | 101 | // the observer now owns the data buffer, and the loader must |
| michael@0 | 102 | // not deallocate it |
| michael@0 | 103 | mData = nullptr; |
| michael@0 | 104 | } |
| michael@0 | 105 | // done.. cleanup |
| michael@0 | 106 | ReleaseData(); |
| michael@0 | 107 | mRequest = 0; |
| michael@0 | 108 | mObserver = 0; |
| michael@0 | 109 | mContext = 0; |
| michael@0 | 110 | } |
| michael@0 | 111 | return NS_OK; |
| michael@0 | 112 | } |
| michael@0 | 113 | |
| michael@0 | 114 | NS_METHOD |
| michael@0 | 115 | nsStreamLoader::WriteSegmentFun(nsIInputStream *inStr, |
| michael@0 | 116 | void *closure, |
| michael@0 | 117 | const char *fromSegment, |
| michael@0 | 118 | uint32_t toOffset, |
| michael@0 | 119 | uint32_t count, |
| michael@0 | 120 | uint32_t *writeCount) |
| michael@0 | 121 | { |
| michael@0 | 122 | nsStreamLoader *self = (nsStreamLoader *) closure; |
| michael@0 | 123 | |
| michael@0 | 124 | if (count > UINT32_MAX - self->mLength) { |
| michael@0 | 125 | return NS_ERROR_ILLEGAL_VALUE; // is there a better error to use here? |
| michael@0 | 126 | } |
| michael@0 | 127 | |
| michael@0 | 128 | if (self->mLength + count > self->mAllocated) { |
| michael@0 | 129 | self->mData = static_cast<uint8_t*>(NS_Realloc(self->mData, |
| michael@0 | 130 | self->mLength + count)); |
| michael@0 | 131 | if (!self->mData) { |
| michael@0 | 132 | self->ReleaseData(); |
| michael@0 | 133 | return NS_ERROR_OUT_OF_MEMORY; |
| michael@0 | 134 | } |
| michael@0 | 135 | self->mAllocated = self->mLength + count; |
| michael@0 | 136 | } |
| michael@0 | 137 | |
| michael@0 | 138 | ::memcpy(self->mData + self->mLength, fromSegment, count); |
| michael@0 | 139 | self->mLength += count; |
| michael@0 | 140 | |
| michael@0 | 141 | *writeCount = count; |
| michael@0 | 142 | |
| michael@0 | 143 | return NS_OK; |
| michael@0 | 144 | } |
| michael@0 | 145 | |
| michael@0 | 146 | NS_IMETHODIMP |
| michael@0 | 147 | nsStreamLoader::OnDataAvailable(nsIRequest* request, nsISupports *ctxt, |
| michael@0 | 148 | nsIInputStream *inStr, |
| michael@0 | 149 | uint64_t sourceOffset, uint32_t count) |
| michael@0 | 150 | { |
| michael@0 | 151 | uint32_t countRead; |
| michael@0 | 152 | return inStr->ReadSegments(WriteSegmentFun, this, count, &countRead); |
| michael@0 | 153 | } |
| michael@0 | 154 | |
| michael@0 | 155 | void |
| michael@0 | 156 | nsStreamLoader::ReleaseData() |
| michael@0 | 157 | { |
| michael@0 | 158 | if (mData) { |
| michael@0 | 159 | NS_Free(mData); |
| michael@0 | 160 | mData = nullptr; |
| michael@0 | 161 | } |
| michael@0 | 162 | mLength = 0; |
| michael@0 | 163 | mAllocated = 0; |
| michael@0 | 164 | } |
