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comparison: modules/libjar/zipwriter/src/nsZipDataStream.cpp
modules/libjar/zipwriter/src/nsZipDataStream.cpp
- changeset 0
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| -1:000000000000 | 0:61ae77e5da5b |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
| 4 */ | |
| 5 | |
| 6 #include "StreamFunctions.h" | |
| 7 #include "nsZipDataStream.h" | |
| 8 #include "nsIStringStream.h" | |
| 9 #include "nsISeekableStream.h" | |
| 10 #include "nsDeflateConverter.h" | |
| 11 #include "nsNetUtil.h" | |
| 12 #include "nsComponentManagerUtils.h" | |
| 13 #include "nsMemory.h" | |
| 14 | |
| 15 #define ZIP_METHOD_STORE 0 | |
| 16 #define ZIP_METHOD_DEFLATE 8 | |
| 17 | |
| 18 /** | |
| 19 * nsZipDataStream handles the writing an entry's into the zip file. | |
| 20 * It is set up to wither write the data as is, or in the event that compression | |
| 21 * has been requested to pass it through a stream converter. | |
| 22 * Currently only the deflate compression method is supported. | |
| 23 * The CRC checksum for the entry's data is also generated here. | |
| 24 */ | |
| 25 NS_IMPL_ISUPPORTS(nsZipDataStream, nsIStreamListener, | |
| 26 nsIRequestObserver) | |
| 27 | |
| 28 nsresult nsZipDataStream::Init(nsZipWriter *aWriter, | |
| 29 nsIOutputStream *aStream, | |
| 30 nsZipHeader *aHeader, | |
| 31 int32_t aCompression) | |
| 32 { | |
| 33 mWriter = aWriter; | |
| 34 mHeader = aHeader; | |
| 35 mStream = aStream; | |
| 36 mHeader->mCRC = crc32(0L, Z_NULL, 0); | |
| 37 | |
| 38 nsresult rv = NS_NewSimpleStreamListener(getter_AddRefs(mOutput), aStream, | |
| 39 nullptr); | |
| 40 NS_ENSURE_SUCCESS(rv, rv); | |
| 41 | |
| 42 if (aCompression > 0) { | |
| 43 mHeader->mMethod = ZIP_METHOD_DEFLATE; | |
| 44 nsCOMPtr<nsIStreamConverter> converter = | |
| 45 new nsDeflateConverter(aCompression); | |
| 46 NS_ENSURE_TRUE(converter, NS_ERROR_OUT_OF_MEMORY); | |
| 47 | |
| 48 rv = converter->AsyncConvertData("uncompressed", "rawdeflate", mOutput, | |
| 49 nullptr); | |
| 50 NS_ENSURE_SUCCESS(rv, rv); | |
| 51 | |
| 52 mOutput = do_QueryInterface(converter, &rv); | |
| 53 NS_ENSURE_SUCCESS(rv, rv); | |
| 54 } | |
| 55 else { | |
| 56 mHeader->mMethod = ZIP_METHOD_STORE; | |
| 57 } | |
| 58 | |
| 59 return NS_OK; | |
| 60 } | |
| 61 | |
| 62 /* void onDataAvailable (in nsIRequest aRequest, in nsISupports aContext, | |
| 63 * in nsIInputStream aInputStream, | |
| 64 * in unsigned long long aOffset, in unsigned long aCount); */ | |
| 65 NS_IMETHODIMP nsZipDataStream::OnDataAvailable(nsIRequest *aRequest, | |
| 66 nsISupports *aContext, | |
| 67 nsIInputStream *aInputStream, | |
| 68 uint64_t aOffset, | |
| 69 uint32_t aCount) | |
| 70 { | |
| 71 if (!mOutput) | |
| 72 return NS_ERROR_NOT_INITIALIZED; | |
| 73 | |
| 74 nsAutoArrayPtr<char> buffer(new char[aCount]); | |
| 75 NS_ENSURE_TRUE(buffer, NS_ERROR_OUT_OF_MEMORY); | |
| 76 | |
| 77 nsresult rv = ZW_ReadData(aInputStream, buffer.get(), aCount); | |
| 78 NS_ENSURE_SUCCESS(rv, rv); | |
| 79 | |
| 80 return ProcessData(aRequest, aContext, buffer.get(), aOffset, aCount); | |
| 81 } | |
| 82 | |
| 83 /* void onStartRequest (in nsIRequest aRequest, in nsISupports aContext); */ | |
| 84 NS_IMETHODIMP nsZipDataStream::OnStartRequest(nsIRequest *aRequest, | |
| 85 nsISupports *aContext) | |
| 86 { | |
| 87 if (!mOutput) | |
| 88 return NS_ERROR_NOT_INITIALIZED; | |
| 89 | |
| 90 return mOutput->OnStartRequest(aRequest, aContext); | |
| 91 } | |
| 92 | |
| 93 /* void onStopRequest (in nsIRequest aRequest, in nsISupports aContext, | |
| 94 * in nsresult aStatusCode); */ | |
| 95 NS_IMETHODIMP nsZipDataStream::OnStopRequest(nsIRequest *aRequest, | |
| 96 nsISupports *aContext, | |
| 97 nsresult aStatusCode) | |
| 98 { | |
| 99 if (!mOutput) | |
| 100 return NS_ERROR_NOT_INITIALIZED; | |
| 101 | |
| 102 nsresult rv = mOutput->OnStopRequest(aRequest, aContext, aStatusCode); | |
| 103 mOutput = nullptr; | |
| 104 if (NS_FAILED(rv)) { | |
| 105 mWriter->EntryCompleteCallback(mHeader, rv); | |
| 106 } | |
| 107 else { | |
| 108 rv = CompleteEntry(); | |
| 109 rv = mWriter->EntryCompleteCallback(mHeader, rv); | |
| 110 } | |
| 111 | |
| 112 mStream = nullptr; | |
| 113 mWriter = nullptr; | |
| 114 mHeader = nullptr; | |
| 115 | |
| 116 return rv; | |
| 117 } | |
| 118 | |
| 119 inline nsresult nsZipDataStream::CompleteEntry() | |
| 120 { | |
| 121 nsresult rv; | |
| 122 nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mStream, &rv); | |
| 123 NS_ENSURE_SUCCESS(rv, rv); | |
| 124 int64_t pos; | |
| 125 rv = seekable->Tell(&pos); | |
| 126 NS_ENSURE_SUCCESS(rv, rv); | |
| 127 | |
| 128 mHeader->mCSize = pos - mHeader->mOffset - mHeader->GetFileHeaderLength(); | |
| 129 mHeader->mWriteOnClose = true; | |
| 130 return NS_OK; | |
| 131 } | |
| 132 | |
| 133 nsresult nsZipDataStream::ProcessData(nsIRequest *aRequest, | |
| 134 nsISupports *aContext, char *aBuffer, | |
| 135 uint64_t aOffset, uint32_t aCount) | |
| 136 { | |
| 137 mHeader->mCRC = crc32(mHeader->mCRC, | |
| 138 reinterpret_cast<const unsigned char*>(aBuffer), | |
| 139 aCount); | |
| 140 | |
| 141 nsresult rv; | |
| 142 nsCOMPtr<nsIStringInputStream> stream = | |
| 143 do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv); | |
| 144 NS_ENSURE_SUCCESS(rv, rv); | |
| 145 | |
| 146 stream->ShareData(aBuffer, aCount); | |
| 147 rv = mOutput->OnDataAvailable(aRequest, aContext, stream, aOffset, aCount); | |
| 148 mHeader->mUSize += aCount; | |
| 149 | |
| 150 return rv; | |
| 151 } | |
| 152 | |
| 153 nsresult nsZipDataStream::ReadStream(nsIInputStream *aStream) | |
| 154 { | |
| 155 if (!mOutput) | |
| 156 return NS_ERROR_NOT_INITIALIZED; | |
| 157 | |
| 158 nsresult rv = OnStartRequest(nullptr, nullptr); | |
| 159 NS_ENSURE_SUCCESS(rv, rv); | |
| 160 | |
| 161 nsAutoArrayPtr<char> buffer(new char[4096]); | |
| 162 NS_ENSURE_TRUE(buffer, NS_ERROR_OUT_OF_MEMORY); | |
| 163 | |
| 164 uint32_t read = 0; | |
| 165 uint32_t offset = 0; | |
| 166 do | |
| 167 { | |
| 168 rv = aStream->Read(buffer.get(), 4096, &read); | |
| 169 if (NS_FAILED(rv)) { | |
| 170 OnStopRequest(nullptr, nullptr, rv); | |
| 171 return rv; | |
| 172 } | |
| 173 | |
| 174 if (read > 0) { | |
| 175 rv = ProcessData(nullptr, nullptr, buffer.get(), offset, read); | |
| 176 if (NS_FAILED(rv)) { | |
| 177 OnStopRequest(nullptr, nullptr, rv); | |
| 178 return rv; | |
| 179 } | |
| 180 offset += read; | |
| 181 } | |
| 182 } while (read > 0); | |
| 183 | |
| 184 return OnStopRequest(nullptr, nullptr, NS_OK); | |
| 185 } |
