CODEWITHSUNDEEP
jsonjmeter
Gökhan Uçar
Gökhan Uçar

Reputation: 226

I can't extract Json because of byte order mark (BOM) - JMeter

I am trying to extract a json variable from a response data in JMeter. But my response json is starting with a byte order mark so it is not recognized as a valid one. Here's my response json's starting part:

{"error":false,"errorCode":null,"message":"","statusCode":200,"data":{"bigSlider":[{"displayOrder":0,"imageUrl":"https:\/\/6rk3rbju.rocketcdn.com\/image\/banner\/shopping-image\/0108slider-tartismasiz-app.jpg","link":{"t.......

Once I remove that "" from the beginning of the response, I am able to extract json variables. But since I have to process the response with a post-processor in JMeter, I have written a script like this:

def BOM = ""
def responseData = prev.getResponseDataAsString()
if (responseData.startsWith(BOM)) {
    responseData = responseData.substring(1)
}
prev.setResponseData(responseData.getBytes('UTF-8'))

But doing this didn't help me but changing the BOM into something different like "»¿"

Could you please help me?

Upvotes: 0

Views: 278

Answers (1)

Dmitri T
Dmitri T

Reputation: 168122

  1. Your code will work only for CP1252, if your file.encoding property is different it won't remove the BOM

  2. ï, » and ¿ are 3 characters in CP1252 therefore you need to replace substring(1) with substring(3)

  3. In general it's better to stick to UTF-8 where possible so I would recommend amending your code as:

    def responseData = prev.getResponseDataAsString().replace('\uFEFF', '')

    just make sure that JMeter's file.encoding property is set to UTF-8

More information:

Upvotes: 1

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