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How to upload a pdf file using REST Assured?

 If you use this code as mentioned in few other blogs and videos:

 

Map<String, String> headers = new HashMap<String, String>();

headers.put("Content-Type", "multipart/form-data");

byte[] fileContent = FileUtils.readFileToByteArray(new File(filePath));

RestAssured.given().headers(headers).body(fileContent).post(url);

 

There are high chances that you will get errors related to content-type or "400 - Request is not a multipart request". So, the solution is to use:

.multiPart("file", new File("/path/to/file"),"application/pdf").

Please note that I have used "application/pdf" as 3rd param in the multiPart method and this value should be passed as per the file type that you are uploading like for the png file it should be "application/octet-stream", for JSON file it should be "application/JSON".

multiPart is an overloaded method that can take max 3 parameters:

 

a) The KEY that identifies the file. Highlighted as "A" below.

b) File object. Highlighted as "B" below.

c) Content-type. Highlighted as "C" below.


.multiPart("A", new File(B), "C")

 

Another NOTE: Rest assured doesn't allow to use .body() and .multiPart() at the same time within it's given() function. And when we use .multiPart(), the content-type automatically get set to "multipart/form-data" unless we override it by providing the 3rd param.

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