Node. js child_process exec return value truncated

Node. js child_process exec return value truncated
In practice, a problem is encountered. When the system command is called using child_process exec, if the returned content of the command is large, the obtained stdout will be truncated. The following is the relevant code:

1. Exec ("some command", function (error, stdout, stderr ){
   
2. // Use the returned value stdout for related Calculation
   
3. }

After investigation, we found that a buffer zone will be used during exec execution. The default size is 200 × 1024. So the solution is to increase the buffer size to the appropriate value:

1. Exec ('dir/B/O-D ^ 2014 *',{
   
2. MaxBuffer: 2000*1024 // quick fix
   
3. }, Function (error, stdout, stderr ){
   
4. List_of_filenames = stdout. split ('\ r \ n'); // adapt to your line ending char
   
5. Console. log ("Found % s files in the replay folder", list_of_filenames.length)
   
6. }
   
7. )

For more information, see the official documentation.

Others also provide a solution, but it is not verified for reference only:

1. Var exec = require('child_process'cmd.exe c;
   
2. 
   
3. Function my_exec (command, callback ){
   
4. Var proc = exec (command );
   
5. 
   
6. Var list = [];
   
7. Proc. stdout. setEncoding ('utf8 ');
   
8. 
   
9. Proc. stdout. on ('data', function (chunk ){
   
10. List. push (chunk );
    
11. });
    
12. 
    
13. Proc. stdout. on ('end', function (){
    
14. Callback (list. join ());
    
15. });
    
16. }
    
17. 
    
18. My_exec ('dir/s', function (stdout ){
    
19. Console. log (stdout );
    
20. })