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Reading from stream to initialize a read-only variable


By : andreadale
Date : July 30 2020, 04:00 PM
With these it helps Unfortunately, what you are trying to do is not possible because of the limitations of the istream interface, which works with non-const references. The best way to "add const" to a variable after it is modified is to use a helper function (or lambda):
code :
template <typename T, typename CharT, typename Traits>
T read_from(std::basic_istream<CharT, Traits>& is)
{
    T value;
    is >> value;
    return value;
}
const auto token = read_from<std::string>(in);


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C#: how to read a line from a stream and then start reading it from beginning?


By : user3396770
Date : March 29 2020, 07:55 AM
To fix the issue you can do I found the answer to my question here:
How can I read an Http response stream twice in C#?
code :
Stream responseStream = CopyAndClose(resp.GetResponseStream());
// Do something with the stream
responseStream.Position = 0;
// Do something with the stream again


private static Stream CopyAndClose(Stream inputStream)
{
const int readSize = 256;
byte[] buffer = new byte[readSize];
MemoryStream ms = new MemoryStream();

int count = inputStream.Read(buffer, 0, readSize);
while (count > 0)
{
    ms.Write(buffer, 0, count);
    count = inputStream.Read(buffer, 0, readSize);
}
ms.Position = 0;
inputStream.Close();
return ms;
}

c# - how using buffered stream is different than reading same number of bytes using read method on source stream?


By : Jerry
Date : March 29 2020, 07:55 AM
This might help you When reading from many data sources (such as files), the slowest part of the operation is often the execution of each individual read request. So the key is to reduce the number of requests saying 'give me N bytes of data from source XXX'.
In the case of file access, it's very likely to be more efficient to do 1 read of 10 MB than it is to do 10 reads of 1 MB.

C# - Stream.Read reading null bytes


By : jedd
Date : March 29 2020, 07:55 AM
Hope that helps The 0x00 bytes were not actually received, they were never written to.
Stream.Read() returns the number of bytes actually read, which is in your case often less than BufferSize. Small amounts of data typically arrive in a single message, in which case the problem does not occur.
code :
int remaining = ContentLength;
int offset = 0;  
while (remaining > 0)
{
    int bytes = _Stream.Read(ByteArray, offset, remaining);
    if (bytes == 0)
    {
        throw new ApplicationException("Server disconnected before the expected amount of data was received");
    }

    offset += bytes;
    remaining -= bytes;
}

Node.js read stream not reading properly from file


By : Jirka Pecka
Date : March 29 2020, 07:55 AM
hope this fix your issue It is the contents of your file, just in byte notation. Try this to get it back:
code :
file_stream.on('readable', () => {
  var buf = file_stream.read()
  if (buf != null) {
    console.log('readable:', buf.toString());
  }
});

Reading A stream through stream.read instead of using a StreamReader


By : Robert Yang
Date : March 29 2020, 07:55 AM
Any of those help That's because you haven't created the byte array that you try to use.
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