Corrupt file when using Java to download a file

Question

This problem seems to occur inconsistently. We use a java applet to download a file from our website, which we temporarily store on the client machine.

Here is the code we use to save the file:

URL targetUrl = new URL(urlForFile);
InputStream content = (InputStream)targetUrl.getContent();
BufferedInputStream buffered = new BufferedInputStream(content);
File savedFile = File.createTempFile("temp",".dat");

FileOutputStream fos = new FileOutputStream(savedFile);
int letter;
while((letter = buffered.read()) != -1)
    fos.write(letter);
fos.close();

Later I will try to access this file using:

ObjectInputStream keyInStream = new ObjectInputStream(new FileInputStream(savedFile));

In most cases, it works without problems, but each time we get an error:

java.io.StreamCorruptedException: invalid stream header: 0D0A0D0A

which makes me think that it is not saving the file correctly.

Answer 1

, , getContent BufferedInputStream, ascii, return return newline (0x0d0a), ObjectInputStream ( .

Answer 2

FTP-, ASCII.

"; type = I" URL.

Answer 3

ObjectInputStream ?

javadoc:

ObjectInputStream ObjectOutputStream.

, , ObjectOutputStream.

FileInputStream.

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Answer 4

3 :

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:

URL targetUrl = new URL(urlForFile);
InputStream is = targetUrl.getInputStream();
File savedFile = File.createTempFile("temp",".dat");
FileOutputStream fos = new FileOutputStream(savedFile);

int count;
byte[] buff = new byte[16 * 1024];
while((count = is.read(buff)) != -1) {
    fos.write(buff, 0, count);
}
fos.close();
content.close();

Answer 5

, . XP, FC ( FC, , ). Unix, , , -.

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