I am trying to encode a URL parameter.
For example when I am encoding
qOddENxeLxL+13drGKYUgA==\n
using URL Encoder tool
It gives the following output which works when I request API
qOddENxeLxL%2B13drGKYUgA%3D%3D%5Cn
But when I am encoding URL from my Java code (Android) using URLEncoder.encode("qOddENxeLxL+13drGKYUgA==\n", "UTF-8");
It gives me the following result
qOddENxeLxL%252B13drGKYUgA%253D%253D%250A
I tried using other Encoding schemes too but could not produce the same result.
The issue is because the \n is being interpreted as a new line character. Java will treat \ inside a string as starting an escape sequence.
You have to escape it in order to get the same thing as in the URL you provided.
System.out.println(URLEncoder.encode("qOddENxeLxL+13drGKYUgA==\\n", "UTF-8"));
This will provide the same result:
qOddENxeLxL%2B13drGKYUgA%3D%3D%5Cn
The issue is that you are feeding \n to the URLEncoder tool, which doesn't understand it as an escape sequence and so gives you %5Cn, and to the Java compiler inside a string literal, which does understand it and so gives you 0x0A.
Figured out the issue, here string was getting encoded two times.
While passing parameter to Retrofit call it is getting encoded automatically by retrofit and I was passing encoded parameter to retrofit so it got encoded again.
BTW thanks for the explanations. :)
% characters and multiple %25 characters.