Upgrade application without source code 
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 (TXT) Bits (.svg) 
       
       Emergency! 
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       An emergency project where the endpoints of an application must be changed. 
       
       
       There was no source code available. Luckily the new URLs had the same length. Un-jarring the application, hex-editing the .class files did (almost) the trick. Which kind of amazed me, because I would have thought the class file format had a checksum. Delivery time from application transfer to deliver the binary patch: 1h38m. 
       
       
       Almost done! 
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       Where I said ‘almost’ I meant: it didn’t work. The new endpoints were called, but the API wanted more than we could give. In the end I had to decompile some relevant class files to add an authentication header to the outgoing requests ( couch a very bubblin’ protocol). Which scared me; some files did not compile clean after decompilation. 
       
       
       However, we took the risk (things were broken already) and it was a First Time Right . Amazed again ;-) 
       
       
       Decompiling, adding said header, compiling, packaging and delivering took some hours. 
       
       
       Might or might not disclose later :-) 
       
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