Databases
StackOverflow2013
Postsdbo
POWhy the result of GZip algorithm is not same in Android and .Net?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POWhy the result of GZip algorithm is not same in Android and .Net?
    primarykey
    data
    text
    <p>Why the result of GZip algorithm is not same in Android and .Net?</p> <p>My code in android:</p> <pre><code> public static String compressString(String str) { String str1 = null; ByteArrayOutputStream bos = null; try { bos = new ByteArrayOutputStream(); BufferedOutputStream dest = null; byte b[] = str.getBytes(); GZIPOutputStream gz = new GZIPOutputStream(bos, b.length); gz.write(b, 0, b.length); bos.close(); gz.close(); } catch (Exception e) { System.out.println(e); e.printStackTrace(); } byte b1[] = bos.toByteArray(); return Base64.encode(b1); } </code></pre> <p>My code in the .Net WebService:</p> <pre><code> public static string compressString(string text) { byte[] buffer = Encoding.UTF8.GetBytes(text); MemoryStream ms = new MemoryStream(); using (GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true)) { zip.Write(buffer, 0, buffer.Length); } ms.Position = 0; MemoryStream outStream = new MemoryStream(); byte[] compressed = new byte[ms.Length]; ms.Read(compressed, 0, compressed.Length); byte[] gzBuffer = new byte[compressed.Length + 4]; System.Buffer.BlockCopy(compressed, 0, gzBuffer, 4, compressed.Length); System.Buffer.BlockCopy(BitConverter.GetBytes(buffer.Length), 0, gzBuffer, 0, 4); return Convert.ToBase64String(gzBuffer); } </code></pre> <p>In android:</p> <pre><code>compressString("hello"); -&gt; "H4sIAAAAAAAAAMtIzcnJBwCGphA2BQAAAA==" </code></pre> <p>In .Net:</p> <pre><code>compressString("hello"); -&gt; "BQAAAB+LCAAAAAAABADtvQdgHEmWJSYvbcp7f0r1StfgdKEIgGATJNiQQBDswYjN5pLsHWlHIymrKoHKZVZlXWYWQMztnbz33nvvvffee++997o7nU4n99//P1xmZAFs9s5K2smeIYCqyB8/fnwfPyLmeVlW/w+GphA2BQAAAA==" </code></pre> <p>It is interesting that when I use <strong>Decompress</strong> method in android to decompress the result of .Net <strong>compressString</strong> method, it returns the original string correctly but I get error when I decompress the result of android <strong>compressedString</strong> method.</p> <p>Android Decompress method:</p> <pre><code> public static String Decompress(String zipText) throws IOException { int size = 0; byte[] gzipBuff = Base64.decode(zipText); ByteArrayInputStream memstream = new ByteArrayInputStream(gzipBuff, 4, gzipBuff.length - 4); GZIPInputStream gzin = new GZIPInputStream(memstream); final int buffSize = 8192; byte[] tempBuffer = new byte[buffSize]; ByteArrayOutputStream baos = new ByteArrayOutputStream(); while ((size = gzin.read(tempBuffer, 0, buffSize)) != -1) { baos.write(tempBuffer, 0, size); } byte[] buffer = baos.toByteArray(); baos.close(); return new String(buffer, "UTF-8"); } </code></pre> <p>I think that there is an error in Android <strong>compressString</strong> method. Can anybody help me?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USbreceivemail
    1. USbreceivemail
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POWhy the result of GZip algorithm is not same in Android and .Net?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POWhy the result of GZip algorithm is not same in Android and .Net?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POWhy the result of GZip algorithm is not same in Android and .Net?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COSimilar issue with ZipOutputStream was resolved by me http://stackoverflow.com/a/11154161/1269737
      singulars
      1. POWhy the result of GZip algorithm is not same in Android and .Net?
      1. USuser1269737
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload