MalformedJsonException: Use JsonReader.setLenient(true)


I keep getting this error when I try to decode a JSON object from a response body:

Traceback (most recent call last):
  File "<input>", line 14, in <module>
ValueError: Unable to parse response body as JSON: Use JsonReader.setLenient(true) to accept malformed JSON at line 2 column 2 path $

Here is my script:

client =
url = ""
headers = {
	"Accept": "application/json",
	"Accept-Encoding": "gzip, deflate, br",
	"Authorization": "Bearer <TOKEN>"
res = client.get(url, headers=headers)
print res.good    # returns True

Is there any way I can fix this?

Is it actually malformed? Do you have an example of it?

Not in Postman. Here is the response:

    "upload_url": "<url>",
    "progress_url": "<url>"

Can you post your whole script? The error references line 14 but there’s not 14 lines in the script you posted.

It was this line (I cleaned it up when I added to post above):

print res.getJson() # res.json returns the same thing

Here is what else I tried (based on SO answers):

from com.inductiveautomation.ignition.common.gson import GsonBuilder
client =
altGson = GsonBuilder().setLenient().create()

Same thing happens.

Hmm, I was going to suggest basically that:

new_gson = client.getGson().newBuilder().setLenient().create()

Try printing str(res.getBody()) or something instead.

getBody() returns data, as far as I can tell. I added the code you included above but still get the same error when I try to getJson().

Also, this is happening in the script console, if that matters. It wasn’t working on a button event, so I’m now investigating.

Does the above print out the JSON you’re getting or just a string rep of the bytes?

Might need something like this instead:

from java.lang import String

print String(res.getBody())

Trying to see the contents of the body without parsing it.

A bunch of gibberish (even though response says it is UTF-8 encoded).

Huh. Not sure what else to try. You probably are getting a body that isn’t JSON, but I don’t know why.

A little facepalm for future readers: there is a getText() method on the response object.

Okay, one last suggestion: remove your gzip/deflate/br headers.

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Boom. That was it :man_facepalming: Thanks Kevin!

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