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💻 Py-Codeforces is a super-fast and type-safe focused library to interact with Codeforces with two clients, asynchronous and synchronous. The fields are used as it is.

Home Page: https://codeforces.com/apiHelp

License: GNU General Public License v3.0

Python 100.00%

code codeforces codeforces-api coding-standards codingcommunity python typesafety

py-codeforces's Introduction

Note

I am Parth. I do stuff that interest my feild or makes me learn something new. I keep my repos hidden. I have reasons for it.

Tip

I am proficient in Rust, Python, Perl, Haskel, Assembly, Kotlin, Java, and some other frameworks and languages of Web Development. I desire to achieve my fields sucess in AI/DL.

Important

I am always on a project.

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py-codeforces's Issues

Invalid Signature while Authorization handshake with API

Status:

Needs help.

Issue related to Authorization.

The issue is regarding the authorization process of the website through API.
Both the Methods contain these parameters:
- enable_auth which is a bool
- auth_key which is a string.
- secret which is a string as well.
- time which is an int representing time in unix format.
While we pass these parameters to the method constructor. The error for Invalid Signature is being returned from the API.

Code where the problem is:

In `AsyncMethod`:

    def _generate_authorisation(
        self,
        end_point_url: str,
        method_name: t.Literal[
            "blogEntry.comments",
            "blogEntry.view",
            "contest.hacks",
            "contest.list",
            "contest.ratingChanges",
            "contest.standings",
            "contest.status",
            "problemset.problems",
            "problemset.recentStatus",
            "recentActions",
            "user.blogEntries",
            "user.friends",
            "user.info",
            "user.ratedList",
            "user.rating",
            "user.status",
        ],
    ) -> str:
        if self._auth_enabled is True:
            if not self._time:
                self._time = int(time.time())
            randon_six_digit_num = random.randint(111111, 999999)
            head = end_point_url.removeprefix(
                f"https://codeforces.com/api/{method_name}?"
            )
            to_hash = f"{randon_six_digit_num}/{method_name}?apiKey={self._auth_key}&{head}&time={self._time}#{self._secret}"
            hashed_string = (hashlib.sha512(to_hash.encode("utf8"))).hexdigest()
            final_url = f"https://codeforces.com/api/{method_name}?{head}&apiKey={self._auth_key}&time={self._time}&apiSig={randon_six_digit_num}{hashed_string}"
            return final_url
        else:
            return end_point_url

In `SyncMethod`:

    def _generate_authorisation(
        self,
        end_point_url: str,
        method_name: t.Literal[
            "blogEntry.comments",
            "blogEntry.view",
            "contest.hacks",
            "contest.list",
            "contest.ratingChanges",
            "contest.standings",
            "contest.status",
            "problemset.problems",
            "problemset.recentStatus",
            "recentActions",
            "user.blogEntries",
            "user.friends",
            "user.info",
            "user.ratedList",
            "user.rating",
            "user.status",
        ],
    ) -> str:
        if self._auth_enabled is True:
            if not self._time:
                self._time = int(time.time())
            randon_six_digit_num = random.randint(111111, 999999)
            head = end_point_url.removeprefix(
                f"https://codeforces.com/api/{method_name}?"
            )
            to_hash = f"{randon_six_digit_num}/{method_name}?apiKey={self._auth_key}&{head}&time={self._time}#{self._secret}"
            hashed_string = (hashlib.sha512(to_hash.encode("utf8"))).hexdigest()
            final_url = f"https://codeforces.com/api/{method_name}?{head}&apiKey={self._auth_key}&time={self._time}&apiSig={randon_six_digit_num}{hashed_string}"
            return final_url
        else:
            return end_point_url

To reproduce the error:

Asynchronous usage:

import asyncio
import pycodeforces

async def main():
    api = pycodeforces.AsyncMethod(enable_auth=True, auth_key="YOUR_AUTH_KEY", secret="YOUR SECRET")
    users = await api.get_user_info(handles="DmitriyH;Fefer_Ivan")
    # use `;` to add multiple parameters.
    async for user in users:
        print(user.avatar)

asyncio.run(main())

Synchronous usage:

import pycodeforces

async def main():
    get = pycodeforces.SyncMethod(enable_auth=True, auth_key="YOUR_AUTH_KEY", secret="YOUR SECRET")
    users = get.get_user_info(handles="DmitriyH;Fefer_Ivan")
    # use `;` to add multiple parameters.
    for user in users:
        print(user.avatar)

Reference to authorization with API:

In: Documentation

Ref:

Guessed Problem:

Hashing of apiSig. Or the way apiSig is hashed.

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