Android Question JSON parser

[DestroShark]

Hey
I faced such a problem, I will be glad to any advice or help, perhaps someone has already encountered such a problem. I store my data encoded as strings (locally and on a remote server, like base64). Now, when I receive a JSON file, I get an error because the string that I need to decode has too many characters as "", and the decoding turns out garbage that cannot be parsed in any way, what should I do in this case?

for example:
encoded output from server: akLlM81Fmc2Rnmc2Q
decoded this string: [{"key1":"value"}] etc.
On this moment i have error, because my decoding function return garbage because of this characters -> " "

Decoding sub works correctly

best regards

 

[DestroShark]

after many attempts I figured out that the $$ symbol should be used, like $"key":"value"$

but how to convert a string from base64 if it produces quotes when decoded

I have this code

dim decodedString as string = B64.DecodeStoS($"${codesb}"$, "UTF8")

where codesb includes my encoded string

 

[Erel]

I don't understand what you are doing but it looks completely wrong.

You should use the JSON library to parse or generate json strings.

 

[DestroShark]

I don't understand what you are doing but it looks completely wrong.

You should use the JSON library to parse or generate json strings.

hello, Erel, thanks for the answer.
I receive the JSON file from the server encrypted, it is contained in the variable codesb. I'm trying to encode this character set and write the result to a variable decodedString. And return this variable for the JSON parser. But when i decode it breaks because of the quotes

 

[Erel]

What is the output of:

Log(decodedString)

?

 

[DestroShark]

What is the output of:

Log(decodedString)

?

this result ---> [{"Qd":$�73"/�pa_|��:"0"[��쉥���"��Ј���&�E�W#�!L�KȖB#��� <---

 

[Erel]

This is not a valid json string. You should post more information...

 

[DestroShark]

This is not a valid json string. You should post more information...

its decoding result after

dim decodedString as string = B64.DecodeStoS($"${codesb}"$, "UTF8")

but it should be something like this
[{"id":"473","Finished":"0"},{"id":"494","Finished":"0"},{"id":"495","Finished":"0"}]

 

[Erel]

1. Your code is the same as:

dim decodedString as string = B64.DecodeStoS(codesb , "UTF8")

2. It returns the base64 decoding. There is a problem somewhere but it is not in the base64 decoding. Maybe in the server.
You can test it with this tool: https://www.base64decode.org/

 

[DestroShark]

1. Your code is the same as:

dim decodedString as string = B64.DecodeStoS(codesb , "UTF8")

2. It returns the base64 decoding. There is a problem somewhere but it is not in the base64 decoding. Maybe in the server.
You can test it with this tool: https://www.base64decode.org/

It is unlikely that the problem is in the server. When I feed the decrypted values straight, everything works, but when I try to decrypt the value from the server into a string, I run into a problem with quotes, the string doesn't know where it ends. Something like this

I have this Result from server: -> iamWQiiIj0ziLC1JwYWlX3VwIjoiMCJ9LHsiaWiO

While decoding my string look like [{ Qd":$�73"/�pa_|��:"0"[��쉥���"��Ј���&�E�W#�!L�KȖB#���
I try return this value for the JSON parser, but it should looks like: [{"id":"473","Finished":"0"},{"id":"494","Finished":"0"},{"id":"495","Finished":"0"}]

when i decoding it from my PHP function it works

 

[Erel]

It has nothing to do with quotes and nothing to do with json. Maybe the encoding is not UTF8 and something else like UTF16. No point in guessing.

I cannot further help here. Sorry.

 

[Peter Simpson]

So what does this give you in your logs???

    Dim SU As StringUtils
    Log(SU.DecodeBase64(codesb))

Would you mind posting the actual full encrypted value in your next response???

 

[OliverA]

but when I try to decrypt the value from the server into a string

How are you decrypting the value? Looks like there may be an issue with the decryption

 

[Alexander Stolte]

when i decoding it from my PHP function it works

Hows your php function looks like?

 

[emexes]

after many attempts I figured out that the $$ symbol should be used, like $"key":"value"$

Why do you have:

dim decodedString as string = B64.DecodeStoS($"${codesb}"$, "UTF8")

and not just:

dim decodedString as string = B64.DecodeStoS(codesb, "UTF8")

.
If codesb is truly Base64, then it should have only ASCII characters < CHR(127) and "UTF8" should work just fine (as would most other maps too).

But you seem to be getting a lot of UTF decoding error flags "�" which makes me wonder what codesb is *before* it is run through DecodeStoS().

 

[DestroShark]

Thanks everyone for the answers, the error was indeed in the decoding sub
You are awesome ^^