Apache NiFi processor 'InvokeHTTP' POST with MultipartFile formdata to remote API

[#1]

I have have two request formdata param. One param is file which is multipart and another is acno which is string. Here is the postman image:

Postman request is working fine. This postman request, I want to process using Apache Nifi. Here I have tried to use below image in apache nifi:

But when start above aldiagram file & acno not found

Here is screen steps:

1. GetFile screen :

2. Update Attribute screen:

3. AttributeToJson screen:

4. InvokeHTTP screen:

I follow steps above screen --> Getfile->UpdateAtribute->AttributeToJson->InvokHttp

What is the wrong of my configuration?

Please help me...

[#2 · Accepted solution]

Hi @enam ,

Not sure where you set the acno  parameter , I cant see it in the UpdateAttribute. Make sure the value is available before the invokeHttp as flowfile attribute. Once you have that and you want to send it as  multipart form request you need to add dynamic property with the following format per the documentation (https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-standard-nar/1.17.0/org.apach...

So in your case  the dynamic property will look like the following:

In this case you probably dont need the AttributeToJson processor.

If that helps please accept solution.

Thanks

[#3 · Accepted solution]

Hi @enam ,

Not sure where you set the acno  parameter , I cant see it in the UpdateAttribute. Make sure the value is available before the invokeHttp as flowfile attribute. Once you have that and you want to send it as  multipart form request you need to add dynamic property with the following format per the documentation (https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-standard-nar/1.17.0/org.apach...

So in your case  the dynamic property will look like the following:

In this case you probably dont need the AttributeToJson processor.

If that helps please accept solution.

Thanks

[#4]

@SAMSAL  thanks for your reply.

[#5]

My understanding is the file "file.xls" will be uploaded and the file name is stored under filename attribute (make sure to set the file name and extension correctly in the UpdateAttribute as file.xls) , Also make sure the following properties are set as follows:

Request Body Enabled : true

Request Multipart Form-Data Filename Enabled : true

The later will set the Content-Disposition accordingly based on the filename attribute so you dont have to add as dynamic property.

Hope that helps.

[#6]

@SAMSALthanks again for your reply.  You describe it clearly. I have updated myfile. but still show file not exist. sorry for disturb you again

Here is the update attribute:

My invokeHttp:

Please help me..

[#7 · Accepted solution]

I did a test on a multipart file upload api and it worked for with the following properties:

No need to add dynamic properties for Content-Disposition & Content-Type. There is a property already for the Content-Type called "Request Content-Type".

[#8]

Dear Samsal,  thank you very much for providing me your valuable  support. It is working now. You save me full weak...Thanks again

[#9]

Hello, I m performing almost the same request and facing some difficulties, anyone can help plz?

I m sending multipart request from Nifi 1.18, but in my case the 1st part should be binary (gzip) and named (data) and the second part should be json file and named (parameters). this works corretly with post man

but I m not able to do the same thing with Nifi 1.18

this is my workflow