[相当多的问题/答案,而我尝试了许多却没有成功。我收到一个使用MemoryStream和DeflateStream进行压缩的字符串(c#)。以下解压缩功能工作正常
fun decompress(string: String): String? {
var decompressedString: String? = ""
try {
val bytes: ByteArray = Base64.decode(string, Base64.DEFAULT)
val inflater = Inflater(true)
val outputStream = ByteArrayOutputStream()
val buffer = ByteArray(1024)
inflater.setInput(bytes)
while (!inflater.finished()) {
val count = inflater.inflate(buffer)
outputStream.write(buffer, 0, count)
}
inflater.end()
outputStream.close()
decompressedString = outputStream.toString("UTF8")
} catch (e: IOException) {
e.printStackTrace()
}
return decompressedString
}
稍后,我需要压缩数据并将其发送回。尝试压缩数据失败。服务器不断告诉我“块长度与其补码不匹配”。我使用以下函数进行压缩
fun compress(string: String): String? {
var compressedString: String? = null
try {
val bytes: ByteArray = string.toByteArray(charset("UTF-8"))
// Compress the bytes
val deflater = Deflater()
//val outputStream = ByteArrayOutputStream()
val buffer = ByteArray(1024)
deflater.setInput(bytes)
deflater.finish()
deflater.deflate(buffer)
deflater.end()
//outputStream.close()
compressedString = Base64.encodeToString(buffer, Base64.DEFAULT)
} catch (e: IOException) {
e.printStackTrace()
}
return compressedString
}
问题不在于服务器端,因为它可与iOS应用正常运行,但不适用于Android。我已经尝试了所有这一切的许多变体,但均未成功。
任何人对于我做错了什么以及要使其正常工作需要做些什么的建议?
谢谢^。^
如果其他人遇到此问题。我可以通过将deflate函数更改为
来解决它var compressedString: String? = ""
val bytes: ByteArray = string.toByteArray(charset("UTF-8"))
val deflater = Deflater(1, true)
deflater.setInput(bytes)
deflater.finish()
val outputStream = ByteArrayOutputStream(bytes.size)
try {
val bytesCompressed = ByteArray(Short.MAX_VALUE.toInt())
val numberOfBytesAfterCompression = deflater.deflate(bytesCompressed)
val returnValues = ByteArray(numberOfBytesAfterCompression)
System.arraycopy(bytesCompressed, 0, returnValues, 0, numberOfBytesAfterCompression)
compressedString = Base64.encodeToString(returnValues, Base64.DEFAULT)
} catch (e: IOException) {
e.printStackTrace()
} finally {
deflater.end()
outputStream.close()
}
从这里deflater examples site获得。
显然,使用前一个功能会增加2个字节,这就是导致此问题的原因。更改后,不添加2个字节。如果有人知道并希望分享,我不太了解如何或为什么这样做,请这样做。