Hello all,
I try to download a gz file, which contains a text
file. I try to use GZIPInputStream, to unzip from the
input stream of HttpMethod, but get a corrupted
result.
First, I suspect that I am doing something wrong with
GZIPInputStream. Hence, I try to confirm
GZIPInputStream is doing a right thing, by
(1) manual download the gz file from web browser and
save it to a disk.
(2) use GZIPInputStream to read FileInputStream, which
is point to the gz file.
(3) verify the output is correct.
Hence, I am suspect that I am doing something wrong
with HttpClient and get incorrect InputStream from it.
The following is my code :
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;
import
org.apache.commons.httpclient.params.HttpMethodParams;
import java.net.*;
import java.util.*;
import java.io.*;
import java.util.zip.*;
/**
*
* @author yccheok
*/
public class Test {
/** Creates a new instance of Test */
public Test() {
}
public static final void main(String[] args)
throws Exception {
HttpClient httpClient = new HttpClient();
byte data[] = new byte[1024];
HttpMethod method = new
GetMethod("http://yancheng.cheok.googlepages.com/1295.dat.gz";);
StringBuffer s = new
StringBuffer(data.length);
httpClient.executeMethod(method);
InputStream inputStream =
method.getResponseBodyAsStream();
java.util.zip.GZIPInputStream gZipInputStream
= new java.util.zip.GZIPInputStream(inputStream);
while(gZipInputStream.read(data, 0,
data.length) != -1) {
s.append(new String(data));
}
gZipInputStream.close();
System.out.println("" + s);
System.out.flush();
/*
*However, if I download manually and use
GZIPInputStream to extract read
*the file, with no HttpClient involvement, no
problem.
*
// Open the gzip file
String inFilename =
"/home/yccheok/Desktop/1295.dat.gz";
GZIPInputStream gzipInputStream =
new GZIPInputStream(new
FileInputStream(inFilename));
// Open the output file
String outFilename =
"/home/yccheok/Desktop/output.txt";
OutputStream out = new
FileOutputStream(outFilename);
// Transfer bytes from the compressed file to
the output file
byte[] buf = new byte[1024];
int len;
while ((len = gzipInputStream.read(buf)) > 0)
{
out.write(buf, 0, len);
}
// Close the file and stream
gzipInputStream.close();
out.close();
*/
/*
try {
StockHistoryServer server = new
CIMBStockHistoryServer("1295");
}
catch(StockHistoryNotFoundException exp) {
exp.printStackTrace();
}
*/
}
}
Is there anything I had missed out? Thank you very
much!
cheok
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