File as a processing input

[OpenGeoShift]

Hello,

I try to build a test process that can read data from a file (just a text file containing "hello world" string).

I managed to make my process available at the process rest endpoint : http://localhost:5000/processes/myprocess

But I don't know how to pass my text file as an input parameter. I didn't find any example.

This is my input metadata (myprocess.py) :

    'inputs': {
        'file': {
            'title': 'file',
            'description': 'what ever file',
            "schema": {
                "type": "string",
                "contentEncoding": "binary",
                "contentMediaType": "application/octet-stream"
            },
            'minOccurs': 1,
            'maxOccurs': 1,
            'metadata': None,
            'keywords': ['file']
        }
    },

This is the code that the process should execute (myprocess.py):

    def execute(self, data):

        mimetype = 'application/json'
        file= data.get('file', None)
        with open(file, mode='rb') as myfile:  # b is important -> binary
            fileContent = myfile.read()
        
        outputs = {
            'result': fileContent
        }

        return mimetype, outputs

This is another independant python script that calls my process:

    filePath=r'C:\dev\test.txt'
    url='http://localhost:5000/processes/myprocess/execution'

    with open(filePath, "rb") as text_file:

        data = {
                  "inputs": {
                    "file": text_file
                  }
                }

        r = requests.post(url, json=data)
        print(r.content)

I tried many ways and I either get an error message when converting my binary as json:

TypeError: Object of type BufferedReader is not JSON serializable

Or I get a 'missing parameters' message from the process (for instance if I try to base64 encode the binary)

Please, can you provide me with an example?
Also, I posted the question on StackOverflow but I didn't manage to use the 'pygeoapi' tag, i have this error message (it doesn't appear in the tag list):

Tags
: [file], [process], [upload], [pygeoapi]
Creating the new tag 'pygeoapi' requires at least 1500 reputation. Try something from the existing tags list instead.