Hi Tharindu,
I think this is caused by "chunking" in input streams. It might happen
because of HTTP protocol or a bug in Java, I'm not sure.
As an alternative solution you can run the MD5 command and compare its
output. Like this,
public String getMd5Checksum(String filePath) throws IOException {
final String md5Command = "md5sum "; // Linux 'md5sum', MacOS 'md5'
Process p = Runtime.getRuntime().exec(md5Command + filePath);
Scanner scn = new Scanner(p.getInputStream());
String rv = scn.nextLine();
scn.close();
return rv;
}
On Sun, Mar 1, 2015 at 2:28 PM, Tharindu Dharmarathna <[email protected]>
wrote:
> Hi Iqbal,
>
> I checked those two files manually I got same hash value to two files.
> This happens in random manner when running the tests
>
>
> On Sun, Mar 1, 2015 at 1:48 PM, Rasika Perera <[email protected]> wrote:
>
>> Hi Tharindu,
>>
>> I checked your `readMD5(InputStream inputStream)` method and it is
>> working as expected. The problem is with the inputStream you are passing
>> into the method.
>>
>> Please verify that you are not passing the *same inputStream* on the
>> second time. Because once it is utilized pos has reached the end. So, the
>> second time you are creating a hash of an empty stream.
>>
>> On Sun, Mar 1, 2015 at 1:41 PM, Irham Iqbal <[email protected]> wrote:
>>
>>> Hi Tharindu
>>>
>>> Did you try to hash those files manually ?
>>> If not try to hash those files manually(i.e *md5sum file.txt) *and
>>> check hash values are same
>>>
>>> Thanks,
>>> Iqbal
>>>
>>>
>>>
>>> On Sun, Mar 1, 2015 at 12:30 PM, Tharindu Dharmarathna <
>>> [email protected]> wrote:
>>>
>>>> Hi all,
>>>>
>>>> I wrote test case on APIDocDownload for the API Manager .When I Run the
>>>> tests It gives me two md5sums for equal files .
>>>>
>>>> here's the code sample I write to get md5 value from the files
>>>>
>>>> private String readMD5(InputStream inputStream) throws
>>>>> NoSuchAlgorithmException, IOException {
>>>>> MessageDigest md = MessageDigest.getInstance("MD5");
>>>>> byte[] dataBytes = new byte[1024];
>>>>> int read;
>>>>> try {
>>>>> while ((read = inputStream.read(dataBytes)) != -1) {
>>>>> md.update(dataBytes, 0, read);
>>>>> }
>>>>> } catch (IOException e) {
>>>>> log.error("File couldn't found to read md5", e);
>>>>> throw e;
>>>>> } finally {
>>>>> inputStream.close();
>>>>> }
>>>>> byte[] mdBytes = md.digest();
>>>>> //convert the byte to hex format
>>>>> StringBuilder sb = new StringBuilder();
>>>>> for (byte mdByte : mdBytes) {
>>>>> sb.append(Integer.toString((mdByte & 0xff) + 0x100, 16).substring(1));
>>>>> }
>>>>> return sb.toString();
>>>>> }
>>>>
>>>> Is there any best way to get two files are identical ?.
>>>>
>>>> Thanks
>>>>
>>>> --
>>>>
>>>> *Tharindu Dharmarathna*Associate Software Engineer
>>>> WSO2 Inc.; http://wso2.com
>>>> lean.enterprise.middleware
>>>>
>>>> mobile: *+94779109091 <%2B94779109091>*
>>>>
>>>> _______________________________________________
>>>> Dev mailing list
>>>> [email protected]
>>>> http://wso2.org/cgi-bin/mailman/listinfo/dev
>>>>
>>>>
>>>
>>>
>>> --
>>> Irham Iqbal
>>> Software Engineer - Test Automation
>>> WSO2, Inc.: http://wso2.com
>>> lean. enterprise. middleware
>>> phone: +94 777888452
>>>
>>> _______________________________________________
>>> Dev mailing list
>>> [email protected]
>>> http://wso2.org/cgi-bin/mailman/listinfo/dev
>>>
>>>
>>
>>
>> --
>> With Regards,
>>
>> *Rasika Perera*
>> Software Engineer
>> M: +94 71 680 9060 E: [email protected]
>> LinkedIn: http://lk.linkedin.com/in/rasika90
>>
>> WSO2 Inc. www.wso2.com
>> lean.enterprise.middleware
>>
>
>
>
> --
>
> *Tharindu Dharmarathna*Associate Software Engineer
> WSO2 Inc.; http://wso2.com
> lean.enterprise.middleware
>
> mobile: *+94779109091 <%2B94779109091>*
>
> _______________________________________________
> Dev mailing list
> [email protected]
> http://wso2.org/cgi-bin/mailman/listinfo/dev
>
>
--
Sajith Ariyarathna
Software Engineer; WSO2, Inc.; http://wso2.com/
mobile: +94 77 6602284, +94 71 3951048
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