[android-developers] Problem passing Unicode string through JSON request
Hi, I am having a unicode string \u3403 which is actualy some japansee character I want to pass it through a JSON object. So i put the value as say String str = \u3403 jsonObject.put(name,str); When i do this the json object internally adds another escape sequence as \\u3403, and the request string has two \ slashes. This is interpreted wrongly by the server as it does not detect unicode name. What can i do for this ? Thanks, Alok. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Problem passing Unicode string through JSON request
On Fri, Nov 12, 2010 at 3:01 PM, Alok Kulkarni kulsu...@gmail.com wrote: Hi, I am having a unicode string \u3403 which is actualy some japansee character I want to pass it through a JSON object. So i put the value as say String str = \u3403 jsonObject.put(name,str); When i do this the json object internally adds another escape sequence as \\u3403, and the request string has two \ slashes. This is interpreted wrongly by the server as it does not detect unicode name. What can i do for this ? Thanks, Alok. Alok, \u3403 is not a unicode string, but a string that has hex code of an unicode character in it. It can be unicode encoded or its encoding can be anything else really. Since \ is a special character and has extra meaning in Java String class, it gets escaped by escape character, which is \. Now you know, what is the extra meaning of \ ;-) Now JSON should not have any problems with parsing such character/string, even when double escaped. Make sure that your server is correctly configured for use of unicode. Also try sending the actual character (paste it from some place that generates a character based on its hex code), but please make sure that your source code is unicode encoded, otherwise it will not work. Daniel -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Problem passing Unicode string through JSON request
Thanks Daniel for your response,
In my app, the user enters a name in japanese language which is to be
sent to server in a JSON request.The server expects the name parameter
in form of a UTF-8 encoded string.
So the encoding of source code should not matter.Here is the sample code
public static String EncodeJson(String strJson)
{
try
{
String strHex = null;
for (int i = 0; i strJson.length(); i++)
{
try{
//char c = strJson.charAt(i);
// int j = (int) c;
// System.out.println(ASCII OF +c + = + j + .);
//System.out.println(strJson.charAt(i), 10=
+Integer.parseInt(+strJson.charAt(i), 10));
if ( strJson.charAt(i) = 126)
{
String start = strJson.substring(0, i);
String end = strJson.substring(i + 1);
int jsonChar = strJson.charAt(i); // new
string(strJson[i], 1);
strHex = 000 + Integer.toHexString(jsonChar);
strHex = strHex.toUpperCase();
strJson = start + \\u +
strHex.substring(strHex.length()-4)+ end;
i += 5;
}
}catch(Exception e){
System.out.println( Exception -
strJson.charAt(i)= +strJson.charAt(i));
}
}
return strJson;
}
catch (Exception ex)
{
Log.i(Encode, ex.toString());
return strJson;
}
}
The output of this method is passed to JSON object using its put
method.At this point an additional \ gets added to the parameter
due to which the server does not recognize this as a valid UTF string
Thanks,
Alok.
On Fri, Nov 12, 2010 at 9:07 PM, Daniel Drozdzewski
daniel.drozdzew...@gmail.com wrote:
On Fri, Nov 12, 2010 at 3:01 PM, Alok Kulkarni kulsu...@gmail.com wrote:
Hi,
I am having a unicode string \u3403 which is actualy some japansee
character
I want to pass it through a JSON object. So i put the value as say
String str = \u3403
jsonObject.put(name,str);
When i do this the json object internally adds another escape
sequence as \\u3403, and the request string has two \ slashes.
This is interpreted wrongly by the server as it does not detect
unicode name.
What can i do for this ?
Thanks,
Alok.
Alok,
\u3403 is not a unicode string, but a string that has hex code of an
unicode character in it. It can be unicode encoded or its encoding can
be anything else really.
Since \ is a special character and has extra meaning in Java String
class, it gets escaped by escape character, which is \. Now you
know, what is the extra meaning of \ ;-)
Now JSON should not have any problems with parsing such
character/string, even when double escaped. Make sure that your server
is correctly configured for use of unicode.
Also try sending the actual character (paste it from some place that
generates a character based on its hex code), but please make sure
that your source code is unicode encoded, otherwise it will not work.
Daniel
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Re: [android-developers] Problem passing Unicode string through JSON request
\u3403 is not a unicode string, but a string that has hex code of an unicode character in it. It can be unicode encoded or its encoding can be anything else really. Since \ is a special character and has extra meaning in Java String class, it gets escaped by escape character, which is \. Now you know, what is the extra meaning of \ ;-) This is not correct in Java. Strings are stored internally as UCS-16. Therefore, \u3403.length() == 1. However, \\u3403.length() == 6. This can be verified with a simple Java program. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Problem passing Unicode string through JSON request
It looks like the code you are using is adding the extra \ here: strJson = start + \\u file://u/ + strHex.substring(strHex.length()-4)+ end; I don't understand the need for the EncodeJson function. As I pointed out earlier, Java stores char and String data internally as sequences of 16-bit character codes (UCS-16). What JSON library are you using to encode the data object you are sewnding to the server? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Problem passing Unicode string through JSON request
I am using Androids JSON library, The extra \ in the line strJson = start + \\u + strHex.substring(strHex.length()-4)+ end; has to be added as an escape sequence else the code does not compile. I don't understand the need for the EncodeJson function. -Though internally java might be storing as UCS-16, when passing to the web service , the web service expectes the parameter to be in UTF-8 encoded string. Thanks, Alok. On Fri, Nov 12, 2010 at 9:42 PM, Frank Weiss fewe...@gmail.com wrote: \u3403 is not a unicode string, but a string that has hex code of an unicode character in it. It can be unicode encoded or its encoding can be anything else really. Since \ is a special character and has extra meaning in Java String class, it gets escaped by escape character, which is \. Now you know, what is the extra meaning of \ ;-) This is not correct in Java. Strings are stored internally as UCS-16. Therefore, \u3403.length() == 1. However, \\u3403.length() == 6. This can be verified with a simple Java program. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Problem passing Unicode string through JSON request
Alok, On Fri, Nov 12, 2010 at 3:56 PM, Alok Kulkarni kulsu...@gmail.com wrote: Thanks Daniel for your response, In my app, the user enters a name in japanese language which is to be sent to server in a JSON request.The server expects the name parameter in form of a UTF-8 encoded string. In JSON you can pass an actual UTF-8 encoded char, like '®' or its safe form (some call it ASCII form or URL encoded form) like '\u00AE' I suggested that you can test few things, for example sending an actual character, but then you have to make sure that your source code is UTF-8 encoded, since the literal is used directly, therefore has to be UTF-8 encoded. There are know issues with some PHP installations running on Win servers that use CP1251 encoding, so if your SOAP receiver is a PHP script in such setup, it would inherit the encoding from PHP. Again, the way to test your server's correctness, you can try passing the actual character rather than its code, BUT make sure that the source is UTF-8 encoded, for the reasons stated above. Daniel -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Problem passing Unicode string through JSON request
Yes it won't compile, but I think you are supposing that (\\u file://u/ + 3403) is the same as \u3403. At any rate, I still thing the EncodeJson function is bogus. AFAIK, the JSON encoder should take care of the UTF-8 encoding. It could also use JSON encoding. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Problem passing Unicode string through JSON request
On Fri, Nov 12, 2010 at 4:33 PM, Frank Weiss fewe...@gmail.com wrote: Yes it won't compile, but I think you are supposing that (\\u + 3403) is the same as \u3403. At any rate, I still thing the EncodeJson function is bogus. AFAIK, the JSON encoder should take care of the UTF-8 encoding. It could also use JSON encoding. +1 The call, we are looking for is: public static String quote (String data) in class JSONObject. Daniel -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
