Question

Trying to download file with apache httpclient library and have a problem with resulting file being smaller than the original (approximately 32-32kb, when normal file size is 92-93) and cannot be opened normally in pdf viewer.
Can someone explain me why this can be happening ? (Using firefox to download this file can sometimes lead to file being downloaded fully and sometimes being downloaded partly)

Here is code I was using to download file via URL

    URL url = new URL("pathtofile");
    final URLConnection connection = url.openConnection();

    final InputStream is = connection.getInputStream();
    FileOutputStream fos = new FileOutputStream("C://result1.pdf");

    byte buffer[] = new byte[1024];
    int bytesRead; 
    while ((bytesRead = is.read(buffer)) >= 0) {        
        fos.write(buffer, 0, bytesRead);
    }
    fos.flush();
    fos.close();
    is.close();

P.S. Was trying to download this file using HttpClient apache library, same result.

UPDATED: Monitoring traffic with network tool I found the difference between receiving file via Firefox and application.

With Firefox first HttpPayloadLine was :

HTTPPayloadLine: 83 Td
/F2 5.80476 Tf
(A:\040Asinis\04017.12.10\04008:32\040laboratorij) Tj
100 Tz
1 1 1 rg
/F1 5.80476 Tf
0 0 0 rg
104.4856 0 Td
<0145> Tj
1 1 1 rg
0 0 0 rg
3.62799 0.72565 Td
/F2 5.80476 Tf
(\040) Tj
1 1 1 rg
0.83137 0.81569 0.78431 RG
ET
51

With application first HttpPayload was

HTTPPayloadLine: CWgC,ú&ÿ3@Î"ݯV¨®~×>×)\ªleÚlµï½ci
¤Ãðð’È/CÈAø¯ª ÍübA«1Ãÿ Åç«VɬZòYóóy7»ÇH.o²e<qZna3l±°¥þ6ñþ[2YÚ1ì³Eë-ÓÊÏ$y:tÎà![ËÅS¤¿É¡¢è,þ|ºs¨)@¢Qâ¯ÝF~}oµÒ>¦ OAxz³äÒ.ß9
æÃZ¤ùÒ¨*«øUή+4×

This measurements was taken via Microsoft Network Monitor

LAST UPDATE It was a server problem after all, after they fixed that files are downloaded successful

Answer 1

Try changing to

while ((bytesRead = in.read(buffer)) != -1) {
 byte[] tmp = ArrayUtils.subarray(buffer, 0, bytesRead);
 fos.write(tmp);
}

you mite get 0 bytes back but that does not mean its finished.Also write only bytes that you received not buffer.