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Reading bytestream and writing to file


Reading bytestream and writing to file

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Reading bytestream and writing to file
Tag : java , By : user143038
Date : November 24 2020, 05:44 AM


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Execute a bytestream as a process in Java without writing to file


Tag : java , By : beebob
Date : March 29 2020, 07:55 AM
I wish did fix the issue. This is not possible to do using the standard Java API. You will have to rely on some OS specific native implementations, either that do the whole thing for you, or that allow you to create some sort of RAM-disk on which you can place your temporary data and execute it.
Possibly related:

array2d from bytestream without writing file to disk


Tag : cpp , By : MikeG
Date : March 29 2020, 07:55 AM
Hope that helps The only way to make it - use OpenCV or some other external library that can read PNG file from memory:
size_t png_buffer_size = 1000;// example value
void* png_buffer; // your PNG image
cv::Mat buffer(1, png_buffer_size, CV_8UC1, png_buffer);
cv::Mat decoded = cv::imdecode(buffer, 1); // should be RGBA32 for PNG
dlib::cv_image<rgb_alpha_pixel> img(decoded); // this image can be used inside dlib
....
auto detections = detector(img);  // this image can be used to detect faces for example or inside any other algorithm
...
// if you need array2d - use assign_image
dlib::array2d<rgb_alpha_pixel> arr;
dlib::assign_image(arr, img);

Using ByteStream for reading UTF-8 characters


Tag : java , By : snapshooter
Date : March 29 2020, 07:55 AM
Does that help When you write a Japanese character to a file, using UTF-8 encoding, you are effectively writing three bytes to it.
The loop you declared doesn't care about characters, it cares about bytes.
while((c=in.read())!=-1){
    out.write(c);
    if(c=='r'){
        break;
    }
}

Writing an extra line when reading a text file from MySQL database and writing into project folder


Tag : java , By : Matt
Date : March 29 2020, 07:55 AM
I wish this helpful for you You are reading the stream incorrectly by ignoring the actual number of bytes read returned by the read method. This leads to off-by-one errors in the number of bytes you write, which results in repeating bytes from earlier reads, corrupting your written file.
You need to change your code to:
byte[] buffer = new byte[4096];
int bytesRead;
while ((bytesRead = input.read(buffer)) != -1) {
    output.write(buffer, 0, bytesRead);
}
Files.copy(input, file.toPath());

Python: Writing a bytestream to overwrite an existing Microsoft Structured Storage OLE Stream


Tag : python-3.x , By : user121350
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , A way to modify OLE/CFB files is to use pythoncom from the pywin32 extensions on Windows (and maybe Linux with WINE): https://github.com/mhammond/pywin32
First, open the OLE file using pythoncom.StgOpenStorageEx: http://timgolden.me.uk/pywin32-docs/pythoncom__StgOpenStorageEx_meth.html
import pythoncom
from win32com.storagecon import *

mode = STGM_READWRITE|STGM_SHARE_EXCLUSIVE
istorage = pythoncom.StgOpenStorageEx(filename, mode, STGFMT_STORAGE, 0, pythoncom.IID_IStorage)
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