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56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
# streaming_providers/providers/joyn/graphql.py
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# -*- coding: utf-8 -*-
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"""
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Joyn GraphQL URL builder.
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The single place that knows how to turn a persisted-query key plus variables
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into an API URL. The hashes and operation names themselves live in
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constants.py (GRAPHQL_QUERY_HASHES / GRAPHQL_OPERATIONS); this module is
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only the assembler.
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Why separate from constants.py: constants is pure data, this is the one bit
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of logic over it. Having a single builder means every manager builds the
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URL the same way, and if the API ever changes the query-string shape (e.g.
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adds a mandatory parameter) there is exactly one place to change.
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"""
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import json
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import urllib.parse
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from typing import Any, Dict, Optional
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from .constants import (
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GRAPHQL_OPERATIONS,
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GRAPHQL_QUERY_HASHES,
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JOYN_GRAPHQL_BASE_URL,
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)
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def build_url(operation_key: str, variables: Optional[Dict[str, Any]] = None) -> str:
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"""
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Build a persisted-query URL.
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`operation_key` is a key in GRAPHQL_OPERATIONS / GRAPHQL_QUERY_HASHES
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(e.g. "LIVE_CHANNELS"). Both the operationName and the sha256Hash come
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from the constants, so they cannot drift.
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Raises KeyError if operation_key is unknown — that's a programmer error,
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not a runtime condition, so it fails loudly.
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"""
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operation_name = GRAPHQL_OPERATIONS[operation_key]
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query_hash = GRAPHQL_QUERY_HASHES[operation_key]
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params = {
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"operationName": operation_name,
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"enable_user_location": "true",
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"watch_assistant_variant": "true",
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}
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if variables:
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params["variables"] = json.dumps(variables, separators=(",", ":"))
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params["extensions"] = json.dumps(
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{"persistedQuery": {"version": 1, "sha256Hash": query_hash}},
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separators=(",", ":"),
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)
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query_string = "&".join(
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f"{k}={urllib.parse.quote(v)}" for k, v in params.items()
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)
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return f"{JOYN_GRAPHQL_BASE_URL}?{query_string}" |