Read Shapefile on Azure Functions

I am using an Azure Function written in python to read a shapefile that comes from a Blob. The configuration is

{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "name": "inputShp",
      "type": "blobTrigger",
      "direction": "in",
      "path": "uploads/shapefile/{name}.shp",
      "connection": "StorageConnectionString"
    }
  ]
}

and the __init__.py script

import logging
from json import dumps
import shapefile
import azure.functions as func

def main(inputShp: func.InputStream):
    logging.info(f"Python blob trigger function processed blob \n"
                  f"Name: {inputShp.name}\n"
                  f"Blob Size: {inputShp.length} bytes")

    reader = shapefile.Reader(inputShp.read())

But this throws an error

Exception: ShapefileException: Shapefile Reader requires a shapefile or file-like object.

I have tried using reader = shapefile.Reader(io.BytesIO(inputShp.read())) instead, which gives the error

error: unpack requires a buffer of 4 bytes

from Read Shapefile on Azure Functions