inputstream

问题 I am using InputStream object to calculate Md5 of some file. I mark the stream Later I reset the stream. However for large files the following exception comes... inStreamLatestFile.mark(0); checkSumCalculated = MD5CheckSumCalculator.calculateMD5CheckSum(inStreamLatestFile); inStreamLatestFile.reset(); The exception .Md5ValidationAggrStrat ||**Error in calculating checksum:: java.io.IOException: Resetting to invalid mark** ||java.io.IOException: Resetting to invalid mark ||at java.io

问题 I am using InputStream object to calculate Md5 of some file. I mark the stream Later I reset the stream. However for large files the following exception comes... inStreamLatestFile.mark(0); checkSumCalculated = MD5CheckSumCalculator.calculateMD5CheckSum(inStreamLatestFile); inStreamLatestFile.reset(); The exception .Md5ValidationAggrStrat ||**Error in calculating checksum:: java.io.IOException: Resetting to invalid mark** ||java.io.IOException: Resetting to invalid mark ||at java.io

问题 I am using InputStream object to calculate Md5 of some file. I mark the stream Later I reset the stream. However for large files the following exception comes... inStreamLatestFile.mark(0); checkSumCalculated = MD5CheckSumCalculator.calculateMD5CheckSum(inStreamLatestFile); inStreamLatestFile.reset(); The exception .Md5ValidationAggrStrat ||**Error in calculating checksum:: java.io.IOException: Resetting to invalid mark** ||java.io.IOException: Resetting to invalid mark ||at java.io

问题 I have a file with 3236000 bytes and I want to read 2936000 from start and write to an OutputStream InputStream is = new FileInputStream(file1); OutputStream os = new FileOutputStream(file2); AFunctionToCopy(is,os,0,2936000); /* a function or sourcecode to write input stream 0to2936000 bytes */ I can read and write byte by byte, but it's to slow (i think) from buffered reading How can do I copy it? 回答1: public static void copyStream(InputStream input, OutputStream output, long start, long end

问题 I am trying to get the bytes of a particular file from the zipped file input stream. I have the input stream data of the Zipped file. From this I am getting the ZipEntry and writing the contents of each ZipEntry to a output stream and returning the byte buffer. This will return the buffer size output stream, but not the contents of each particular file. Is there a way I can convert the FileOutputStream to bytes or directly read the bytes of each ZipEntry? I need to return the ZipEntry

问题 I am trying to get the bytes of a particular file from the zipped file input stream. I have the input stream data of the Zipped file. From this I am getting the ZipEntry and writing the contents of each ZipEntry to a output stream and returning the byte buffer. This will return the buffer size output stream, but not the contents of each particular file. Is there a way I can convert the FileOutputStream to bytes or directly read the bytes of each ZipEntry? I need to return the ZipEntry

问题 I have troubles with my program when i need to send Strings from my server bluetooth-socket to my client bluetooth-socket. Everything works fine as long as I am only sending one String at a time (for example chatting) but if I need to write more Strings at a short period of time (to interchange informations), the Strings will not get seperated from the client code. For example if I'm sending "FirstUser" and right after that "SecondUser" the client does not read "FirstUser" and then

问题 I have troubles with my program when i need to send Strings from my server bluetooth-socket to my client bluetooth-socket. Everything works fine as long as I am only sending one String at a time (for example chatting) but if I need to write more Strings at a short period of time (to interchange informations), the Strings will not get seperated from the client code. For example if I'm sending "FirstUser" and right after that "SecondUser" the client does not read "FirstUser" and then

问题 I have troubles with my program when i need to send Strings from my server bluetooth-socket to my client bluetooth-socket. Everything works fine as long as I am only sending one String at a time (for example chatting) but if I need to write more Strings at a short period of time (to interchange informations), the Strings will not get seperated from the client code. For example if I'm sending "FirstUser" and right after that "SecondUser" the client does not read "FirstUser" and then

问题 In Swift 3.x, we usually handle binary data using Data ; from it you can generate most other important types, and there are useful functions on it. But how do I create a Data from an InputStream ? Is there a nice way? 回答1: I could not find a nice way. We can create a nice-ish wrapper around the unsafe stuff: extension Data { init(reading input: InputStream) throws { self.init() input.open() defer { input.close() } let bufferSize = 1024 let buffer = UnsafeMutablePointer<UInt8>.allocate