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""" File contains endpoint for computational streaming"""
import os
from flask import current_app
from flask import jsonify
from flask import Blueprint
from flask import request
streaming = Blueprint("stream", __name__)
@streaming.route("/<identifier>", methods=["GET"])
def stream(identifier):
""" This endpoint streams stdout from a file.
It expects the indetifier to be the filename
in the TMPDIR created at the main computation
endpoint see example api/rqtl."""
output_file = os.path.join(current_app.config.get("TMPDIR"),
f"{identifier}.txt")
seek_position = int(request.args.get("peak", 0))
with open(output_file, encoding="utf-8") as file_handler:
# read from the last read position default to 0
file_handler.seek(seek_position)
results = {"data": file_handler.readlines(),
"run_id": identifier,
"pointer": file_handler.tell()}
return jsonify(results)
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