How to Extract query param from nifi

varun_rathinam — Tue, 06 Feb 2018 19:15:44 GMT

Hi,

I had been automate get request based on user query param using nifi with help of InvokeHttp.Here is the example;

http://aaa.com/q="bigdata"&api_key=""

http://aaa.com/q="apple"&api_key=""

I did split text using line by line read and invoke http processor using fetch those response as json format. My question is before invokehttp processor, i want to extract those query param values those query values are static. I need to know which query param using i got response. Please give me some suggestion. It would much helpful.

Thanks.

Re: How to Extract query param from nifi

Shu_ashu — Sun, 18 Aug 2019 04:02:17 GMT

@Varun R

After split text processor use extract text processor and add new property with matching regex, then the extracted attribute will be added as the flowfile attribute.

Example:-

After split text you are having each address in a flowfile as like this http://aaa.com/q="bigdata"≈i_key="", now you want to know which query param value(ex:bigdata) has been used.

Then use extract text add new property

query_values

q="(.*?)"

output flowfile:-

Once the flowfile processed by extract text processor it matches the regex and adds the attribute query_values to the flowfile.

By this way you are going to know which query param values are used to get response.

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How to Extract query param from nifi

Re: How to Extract query param from nifi