113 lines
2.9 KiB
Python
113 lines
2.9 KiB
Python
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#!/usr/bin/env python3
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# Copyright 2020 Midgard
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Configure me
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FUNDS = {
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# To get these URLs, you'll need to go to the fund page and find the frame that has the actual
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# data and take its URL
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"PREFERRED_SYMBOL": "https://www.tijd.be/customers/mediafin.be/funds_tijd/123/Fund/456789?t="
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}
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DIRECTORY = "/var/local/rate_fetcher"
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# Currencies fetched are always all those that are published by the ECB, currently
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# AUD, BGN, BRL, CAD, CHF, CNY, CZK, DKK, GBP, HKD, HRK, HUF, IDR, ILS, INR, ISK,
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# JPY, KRW, MXN, MYR, NOK, NZD, PHP, PLN, RON, RUB, SEK, SGD, THB, TRY, USD, ZAR
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import requests
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import os.path
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import re
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from typing import NamedTuple
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class LogItem(NamedTuple):
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symbol: str
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date: str
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value: str
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def get_ecb():
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r = requests.get("https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml")
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m = re.search(r"<Cube time='([0-9-]+)'>", r.text)
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assert m
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date = m.group(1)
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for item in re.findall(r"<Cube currency='([A-Z]+)' rate='([0-9.]+)'/>", r.text):
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symbol, value = item
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yield LogItem(
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symbol=symbol,
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date=date,
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value="{:.5f}".format(1.0 / float(value)),
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)
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def get_fund(symbol, url):
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r = requests.get(url)
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m = re.search(r"Actuele NIW op ([0-9]{1,2})/([0-9]{1,2})/([0-9]{4}).*?<span>([0-9]+),([0-9]+)</span>", r.text, re.MULTILINE|re.DOTALL)
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assert m
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groups = m.groups()
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return LogItem(
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symbol=symbol,
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date="{2}-{1:0>2}-{0:0>2}".format(*groups),
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value="{3}.{4}".format(*groups),
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)
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def get_funds():
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return [
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get_fund(symbol, url)
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for symbol, url in FUNDS.items()
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]
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START_OF_STREAM = 0
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CURRENT_POSITION = 1
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END_OF_STREAM = 2
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def last_line(fh, max_line_length=80):
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"""Simple and stupid way to read the last line of a file"""
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try:
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fh.seek(-max_line_length, END_OF_STREAM)
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except OSError:
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fh.seek(0, START_OF_STREAM)
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lines = fh.readlines()
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return lines[-1] if lines else None
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def format_logline(entry: LogItem):
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return f"P {entry.date} 18:00:00 {entry.symbol} € {entry.value}"
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def log(entry: LogItem):
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filename = os.path.join(DIRECTORY, "{symbol}.log".format(symbol=entry.symbol))
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try:
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with open(filename, "rb") as fh:
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if entry.date.encode() in (last_line(fh) or ""):
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return
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except FileNotFoundError:
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pass
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with open(filename, "a") as fh:
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print(format_logline(entry), file=fh)
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def main():
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for entry in [*get_ecb(), *get_funds()]:
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log(entry)
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if __name__ == '__main__':
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main()
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