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feat(catalog): a video's related videos, without what the user has seen

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GET /api/search/related/{video_id} reads the list YouTube shows beside a
video from the website's InnerTube "next" endpoint (no quota), and brings
it into the catalog the way live-search results come in. It leaves out
what the user watched or hid, here or in their Takeout history (unless
taken back to "new" since), blocked channels and the video itself, and
pages on until 20 are gathered (at most 4 pages). region=topical|hu picks
the locale the list is filled in. Its own per-user daily cap
(related_daily_limit_per_user, one event per opened list); a failed
scrape answers 422 youtube/unavailable.

The InnerTube request (live key, consent cookie, errors) moves into
youtube/innertube.py, shared by the search scrape and the related one.
This commit is contained in:
peter
2026-10-24 16:00:37 +02:00
parent 4695e1a62f
commit 8b37c470ba
19 changed files with 2263 additions and 108 deletions
Download Patch File Download Diff File Expand all files Collapse all files
backend/tests/fixtures/innertube_next_continuation.json
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+527
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{
"onResponseReceivedEndpoints": [
{
"appendContinuationItemsAction": {
"continuationItems": [
{
"lockupViewModel": {
"contentImage": {
"thumbnailViewModel": {
"image": {
"sources": [
{
"url": "https://i.ytimg.com/vi/_HfdncCbMOE/hqdefault.jpg?sqp=-oaymwEiCKgBEF5IWvKriqkDFQgBFQAAAAAYASUAAMhCPQCAokN4AQ==&rs=AOn4CLARvB39pkdsiuUUQTsZjkhvbKrfcQ",
"width": 168,
"height": 94
},
{
"url": "https://i.ytimg.com/vi/_HfdncCbMOE/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLB15aZU5-tzwYCEbNTnZK3UX6ZCzQ",
"width": 336,
"height": 188
}
]
},
"overlays": [
{
"thumbnailBottomOverlayViewModel": {
"badges": [
{
"thumbnailBadgeViewModel": {
"text": "1:08:18",
"badgeStyle": "THUMBNAIL_OVERLAY_BADGE_STYLE_DEFAULT",
"animationActivationTargetId": "_HfdncCbMOE",
"animatedText": "Now playing",
"animationActivationEntitySelectorType": "THUMBNAIL_BADGE_ANIMATION_ENTITY_SELECTOR_TYPE_PLAYER_STATE"
}
}
]
}
}
]
}
},
"metadata": {
"lockupMetadataViewModel": {
"title": {
"content": "MIT 6.S191 (2025): Large Language Models (Liquid AI)"
},
"image": {
"decoratedAvatarViewModel": {
"avatar": {
"avatarViewModel": {
"image": {
"sources": [
{
"url": "https://yt3.ggpht.com/ytc/AIdro_k517G0Dt8QgsF86GKzYkG3Rs8jSGCiYGJw04lx4_1KXQ=s68-c-k-c0x00ffffff-no-rj",
"width": 68,
"height": 68
}
]
},
"avatarImageSize": "AVATAR_SIZE_M"
}
},
"a11yLabel": "Go to channel Alexander Amini",
"rendererContext": {
"commandContext": {
"onTap": {
"innertubeCommand": {
"browseEndpoint": {
"browseId": "UCtslD4DGH6PKyG_1gFAX7sg"
}
}
}
}
}
}
},
"metadata": {
"contentMetadataViewModel": {
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{
"metadataParts": [
{
"text": {
"content": "Alexander Amini"
}
}
]
},
{
"metadataParts": [
{
"text": {
"content": "62K"
},
"accessibilityLabel": "62 thousand views",
"leadingIcon": {
"name": "PLAY_ARROW_OUTLINED",
"height": 12,
"width": 12,
"marginEndToken": {
"spacing": 2
}
}
},
{
"text": {
"content": "1y ago"
},
"accessibilityLabel": "1 year ago"
}
]
}
],
"delimiter": " "
}
}
}
},
"contentId": "_HfdncCbMOE",
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},
{
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"image": {
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{
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"width": 168,
"height": 94
},
{
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"width": 336,
"height": 188
}
]
},
"overlays": [
{
"thumbnailBottomOverlayViewModel": {
"badges": [
{
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"text": "1:08:19",
"badgeStyle": "THUMBNAIL_OVERLAY_BADGE_STYLE_DEFAULT",
"animationActivationTargetId": "P7Hkh2zOGQ0",
"animatedText": "Now playing",
"animationActivationEntitySelectorType": "THUMBNAIL_BADGE_ANIMATION_ENTITY_SELECTOR_TYPE_PLAYER_STATE"
}
}
]
}
}
]
}
},
"metadata": {
"lockupMetadataViewModel": {
"title": {
"content": "MIT 6.S191 (2024): Google - Generative AI for Media"
},
"image": {
"decoratedAvatarViewModel": {
"avatar": {
"avatarViewModel": {
"image": {
"sources": [
{
"url": "https://yt3.ggpht.com/ytc/AIdro_k517G0Dt8QgsF86GKzYkG3Rs8jSGCiYGJw04lx4_1KXQ=s68-c-k-c0x00ffffff-no-rj",
"width": 68,
"height": 68
}
]
},
"avatarImageSize": "AVATAR_SIZE_M"
}
},
"a11yLabel": "Go to channel Alexander Amini",
"rendererContext": {
"commandContext": {
"onTap": {
"innertubeCommand": {
"browseEndpoint": {
"browseId": "UCtslD4DGH6PKyG_1gFAX7sg"
}
}
}
}
}
}
},
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{
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{
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}
}
]
},
{
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{
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},
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"marginEndToken": {
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}
}
},
{
"text": {
"content": "2y ago"
},
"accessibilityLabel": "2 years ago"
}
]
}
],
"delimiter": " "
}
}
}
},
"contentId": "P7Hkh2zOGQ0",
"contentType": "LOCKUP_CONTENT_TYPE_VIDEO",
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}
}
},
{
"continuationItemRenderer": {
"trigger": "CONTINUATION_TRIGGER_ON_ITEM_SHOWN",
"continuationEndpoint": {
"commandMetadata": {
"webCommandMetadata": {
"sendPost": true,
"apiUrl": "/youtubei/v1/next"
}
},
"continuationCommand": {
"token": "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",
"request": "CONTINUATION_REQUEST_TYPE_WATCH_NEXT"
}
}
}
}
]
}
}
]
}
backend/tests/fixtures/innertube_next_first.json
Vendored
+805
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@@ -0,0 +1,805 @@
{
"contents": {
"twoColumnWatchNextResults": {
"secondaryResults": {
"secondaryResults": {
"results": [
{
"lockupViewModel": {
"contentImage": {
"thumbnailViewModel": {
"image": {
"sources": [
{
"url": "https://i.ytimg.com/vi/to-lHJfK4pw/hqdefault.jpg?sqp=-oaymwEiCKgBEF5IWvKriqkDFQgBFQAAAAAYASUAAMhCPQCAokN4AQ==&rs=AOn4CLBKP_oFChvoqvwVrKAy_PG9bn2_AA",
"width": 168,
"height": 94
},
{
"url": "https://i.ytimg.com/vi/to-lHJfK4pw/hqdefault.jpg?sqp=-oaymwEjCNACELwBSFryq4qpAxUIARUAAAAAGAElAADIQj0AgKJDeAE=&rs=AOn4CLDyH3Z8DJhXMmFJ5eKEWMufk7ql9g",
"width": 336,
"height": 188
}
]
},
"overlays": [
{
"thumbnailBottomOverlayViewModel": {
"badges": [
{
"thumbnailBadgeViewModel": {
"text": "1:02:00",
"badgeStyle": "THUMBNAIL_OVERLAY_BADGE_STYLE_DEFAULT",
"animationActivationTargetId": "to-lHJfK4pw",
"animatedText": "Now playing",
"animationActivationEntitySelectorType": "THUMBNAIL_BADGE_ANIMATION_ENTITY_SELECTOR_TYPE_PLAYER_STATE"
}
}
]
}
}
]
}
},
"metadata": {
"lockupMetadataViewModel": {
"title": {
"content": "MIT 6.S191 (2025): Reinforcement Learning"
},
"image": {
"decoratedAvatarViewModel": {
"avatar": {
"avatarViewModel": {
"image": {
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"token": "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%3D",
"request": "CONTINUATION_REQUEST_TYPE_WATCH_NEXT"
}
},
"button": {
"buttonRenderer": {
"style": "STYLE_SUGGESTIVE",
"size": "SIZE_DEFAULT",
"isDisabled": false,
"text": {
"runs": [
{
"text": "Show more"
}
]
},
"command": {
"commandMetadata": {
"webCommandMetadata": {
"sendPost": true,
"apiUrl": "/youtubei/v1/next"
}
},
"continuationCommand": {
"token": "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%3D",
"request": "CONTINUATION_REQUEST_TYPE_WATCH_NEXT"
}
}
}
}
}
}
]
}
}
}
}
}
backend/tests/test_related_route.py
+298
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@@ -0,0 +1,298 @@
"""`GET /api/search/related/{video_id}` — a video's related videos, without what the user has seen.
The scrape is replaced by pages the test hands out, and YouTube's videos.list by an offline enrich
(30-minute videos, so no Shorts probe goes out). What is held: the list leaves out what this user
watched or hid — here or in their Takeout history, unless taken back to "new" since — blocked
channels and the video itself; it pages on until it has enough; it lands in the catalog the way
search finds do; and a failure, or the day's cap, says so instead of answering an empty list."""
from datetime import datetime, timedelta, timezone
import pytest
from sqlalchemy import select
from app import quota, sysconfig
from app.catalog.models import BlockedChannel, Channel, Video
from app.models import QuotaEvent
from app.reader.models import TakeoutItem, TakeoutKind, VideoState, VideoUnmark
from app.routes import search as search_routes
from app.youtube.innertube import ScrapeError
T0 = datetime(2026, 10, 1, tzinfo=timezone.utc)
SOURCE = "srcvideo001"
def _vid(n: int) -> str:
return f"rel{n:08d}"
def _item(n: int, channel: str = "UCrelated01") -> dict:
return {
"id": _vid(n),
"channel_id": channel,
"channel_title": f"Chan {channel}",
"title": f"Related {n}",
"published_at": None,
"thumbnail_url": None,
"live_broadcast": "none",
}
class _FakeYT:
def __init__(self, *_a, **_kw):
pass
def __enter__(self):
return self
def __exit__(self, *exc):
return False
def get_channels(self, ids):
return []
def get_videos(self, ids):
return [
{
"id": i,
"snippet": {"title": f"T {i}", "publishedAt": "2025-01-01T00:00:00Z"},
"contentDetails": {"duration": "PT30M"},
"statistics": {},
"status": {},
}
for i in ids
]
@pytest.fixture
def pages(monkeypatch, db):
"""The scrape answers with the pages in `state["pages"]`, one per call, recording each call."""
sysconfig.set_value(db, "shorts_probe_max_seconds", 60)
state: dict = {"pages": [], "calls": []}
def related(video_id, continuation=None, *, hl="en", gl="US"):
state["calls"].append((video_id, continuation, hl, gl))
page = state["pages"].pop(0)
if isinstance(page, Exception):
raise page
return page
monkeypatch.setattr(search_routes.related_scrape, "related", related)
monkeypatch.setattr(search_routes, "YouTubeClient", _FakeYT)
return state
def _page(items: list[dict], token: str | None = "NEXT") -> dict:
return {"items": items, "next_page_token": token}
def _ids(resp) -> list[str]:
assert resp.status_code == 200, resp.text
return [it["id"] for it in resp.json()["items"]]
def _known(db, *ns: int, channel: str = "UCrelated01") -> None:
"""These related videos already in the catalog (a state needs the row)."""
if db.get(Channel, channel) is None:
db.add(Channel(id=channel, title="Chan"))
for n in ns:
db.add(Video(id=_vid(n), channel_id=channel, title=f"Related {n}", published_at=T0))
db.commit()
def test_a_related_list_comes_into_the_catalog_as_search_finds_do(db, make_user, as_user, pages):
user = make_user()
pages["pages"] = [_page([_item(n) for n in range(1, 21)])]
resp = as_user(user).get(f"/api/search/related/{SOURCE}")
assert _ids(resp) == [_vid(n) for n in range(1, 21)]
assert resp.json()["next_cursor"] == "NEXT" and resp.json()["has_more"] is True
video = db.get(Video, _vid(1))
# Flagged like a search find: hidden from the shared Library, reclaimed when nobody keeps it.
assert video.via_search is True and video.enriched_at is not None
assert pages["calls"] == [(SOURCE, None, "en", "US")]
def test_what_the_user_watched_or_hid_here_is_left_out(db, make_user, as_user, pages):
user = make_user()
other = make_user()
_known(db, 1, 2, 3, 4)
db.add_all(
[
VideoState(user_id=user.id, video_id=_vid(1), status="watched", watched_at=T0),
VideoState(user_id=user.id, video_id=_vid(2), status="hidden"),
# In progress is not "seen": it stays, to be finished.
VideoState(user_id=user.id, video_id=_vid(3), status="new", position_seconds=120),
# Someone else's watch is theirs.
VideoState(user_id=other.id, video_id=_vid(4), status="watched", watched_at=T0),
]
)
db.commit()
pages["pages"] = [_page([_item(n) for n in range(1, 6)], token=None)]
assert _ids(as_user(user).get(f"/api/search/related/{SOURCE}")) == [_vid(3), _vid(4), _vid(5)]
def test_what_the_takeout_history_shows_watched_is_left_out_unless_taken_back(
db, make_user, as_user, pages
):
user = make_user()
other = make_user()
_known(db, 2)
db.add_all(
[
# Not in the catalog at all: the history alone names it.
TakeoutItem(user_id=user.id, kind=TakeoutKind.WATCHED, video_id=_vid(1), at=T0),
# Watched on YouTube, then taken back to "new" here: it may come again.
TakeoutItem(user_id=user.id, kind=TakeoutKind.WATCHED, video_id=_vid(2), at=T0),
VideoUnmark(user_id=user.id, video_id=_vid(2), at=T0 + timedelta(days=1)),
# Only in Watch later: not watched.
TakeoutItem(user_id=user.id, kind=TakeoutKind.WATCH_LATER, video_id=_vid(3), at=T0),
# Another user's history.
TakeoutItem(user_id=other.id, kind=TakeoutKind.WATCHED, video_id=_vid(4), at=T0),
]
)
db.commit()
pages["pages"] = [_page([_item(n) for n in range(1, 5)], token=None)]
assert _ids(as_user(user).get(f"/api/search/related/{SOURCE}")) == [_vid(2), _vid(3), _vid(4)]
def test_an_unmark_older_than_the_history_row_does_not_bring_it_back(db, make_user, as_user, pages):
user = make_user()
_known(db, 1)
db.add_all(
[
VideoUnmark(user_id=user.id, video_id=_vid(1), at=T0 - timedelta(days=1)),
TakeoutItem(user_id=user.id, kind=TakeoutKind.WATCHED, video_id=_vid(1), at=T0),
]
)
db.commit()
pages["pages"] = [_page([_item(1), _item(2)], token=None)]
assert _ids(as_user(user).get(f"/api/search/related/{SOURCE}")) == [_vid(2)]
def test_another_users_unmark_does_not_bring_it_back(db, make_user, as_user, pages):
user = make_user()
other = make_user()
_known(db, 1)
db.add_all(
[
TakeoutItem(user_id=user.id, kind=TakeoutKind.WATCHED, video_id=_vid(1), at=T0),
VideoUnmark(user_id=other.id, video_id=_vid(1), at=T0 + timedelta(days=1)),
]
)
db.commit()
pages["pages"] = [_page([_item(1), _item(2)], token=None)]
assert _ids(as_user(user).get(f"/api/search/related/{SOURCE}")) == [_vid(2)]
def test_blocked_channels_and_the_video_itself_are_left_out_and_never_stored(
db, make_user, as_user, pages
):
user = make_user()
db.add(Channel(id="UCblocked01", title="Blocked"))
db.commit()
db.add(BlockedChannel(user_id=user.id, channel_id="UCblocked01"))
db.commit()
own = {**_item(9), "id": SOURCE}
pages["pages"] = [_page([_item(1), _item(2, "UCblocked01"), own], token=None)]
assert _ids(as_user(user).get(f"/api/search/related/{SOURCE}")) == [_vid(1)]
assert db.get(Video, _vid(2)) is None
def test_it_pages_on_until_enough_unseen_videos_are_gathered(db, make_user, as_user, pages):
user = make_user()
_known(db, *range(1, 16))
for n in range(1, 16):
db.add(VideoState(user_id=user.id, video_id=_vid(n), status="watched", watched_at=T0))
db.commit()
pages["pages"] = [
_page([_item(n) for n in range(1, 21)], token="page2"), # 15 seen, 5 new
_page([_item(n) for n in range(21, 41)], token="page3"), # 20 new: 25 now
_page([_item(n) for n in range(41, 61)], token="page4"), # never asked
]
ids = _ids(resp := as_user(user).get(f"/api/search/related/{SOURCE}"))
assert ids == [_vid(n) for n in range(16, 41)]
assert [c[1] for c in pages["calls"]] == [None, "page2"]
assert resp.json()["next_cursor"] == "page3"
def test_a_repeat_on_a_later_page_counts_once(db, make_user, as_user, pages):
user = make_user()
pages["pages"] = [
_page([_item(n) for n in range(1, 11)], token="page2"),
_page([_item(n) for n in range(5, 25)], token=None),
]
assert _ids(as_user(user).get(f"/api/search/related/{SOURCE}")) == [
_vid(n) for n in range(1, 25)
]
def test_it_reads_at_most_four_pages(db, make_user, as_user, pages):
user = make_user()
pages["pages"] = [_page([_item(n)], token=f"page{n + 1}") for n in range(1, 7)]
ids = _ids(resp := as_user(user).get(f"/api/search/related/{SOURCE}"))
assert ids == [_vid(n) for n in range(1, 5)]
assert len(pages["calls"]) == 4 and resp.json()["next_cursor"] == "page5"
def test_the_cursor_and_the_hungarian_locale_reach_the_scrape(db, make_user, as_user, pages):
user = make_user()
pages["pages"] = [_page([_item(1)], token=None)]
resp = as_user(user).get(f"/api/search/related/{SOURCE}?cursor=C1&region=hu")
assert _ids(resp) == [_vid(1)]
assert pages["calls"] == [(SOURCE, "C1", "hu", "HU")]
assert resp.json()["has_more"] is False
def test_an_unknown_region_is_refused(db, make_user, as_user, pages):
user = make_user()
assert as_user(user).get(f"/api/search/related/{SOURCE}?region=xx").status_code == 422
assert pages["calls"] == []
def test_a_failed_scrape_says_youtube_is_unavailable(db, make_user, as_user, pages):
user = make_user()
pages["pages"] = [ScrapeError("blocked")]
resp = as_user(user).get(f"/api/search/related/{SOURCE}")
assert resp.status_code == 422
assert resp.json()["detail"] == {"code": "youtube", "reason": "unavailable"}
def test_a_failure_on_a_later_page_keeps_what_came_before(db, make_user, as_user, pages):
user = make_user()
pages["pages"] = [_page([_item(1), _item(2)], token="page2"), ScrapeError("blocked")]
assert _ids(as_user(user).get(f"/api/search/related/{SOURCE}")) == [_vid(1), _vid(2)]
def test_one_list_is_one_event_against_the_days_cap(db, make_user, as_user, pages):
user = make_user()
sysconfig.set_value(db, "related_daily_limit_per_user", 1)
pages["pages"] = [
_page([_item(1)], token="page2"),
_page([_item(2)], token=None),
]
client = as_user(user)
assert client.get(f"/api/search/related/{SOURCE}").status_code == 200
events = db.scalars(
select(QuotaEvent).where(
QuotaEvent.user_id == user.id, QuotaEvent.action == quota.QuotaAction.VIDEOS_RELATED
)
).all()
assert len(events) == 1
refused = client.get(f"/api/search/related/{SOURCE}")
assert refused.status_code == 429
assert refused.json()["detail"] == {
"code": "refused",
"reason": "related_daily_limit",
"limit": 1,
}
assert len(pages["calls"]) == 2 # the refused one asked YouTube nothing
def test_reading_further_is_the_same_list_not_another_one(db, make_user, as_user, pages):
user = make_user()
sysconfig.set_value(db, "related_daily_limit_per_user", 2)
pages["pages"] = [_page([_item(1)], token=None), _page([_item(2)], token=None)]
client = as_user(user)
assert client.get(f"/api/search/related/{SOURCE}").status_code == 200
assert client.get(f"/api/search/related/{SOURCE}?cursor=more").status_code == 200
assert quota.actions_today(db, user.id, quota.QuotaAction.VIDEOS_RELATED) == 1
backend/tests/test_related_scrape.py
+212
View File
@@ -0,0 +1,212 @@
"""youtube/related_scrape — a video's related videos from the InnerTube `next` endpoint.
The two pages under `fixtures/` are real answers (2026-10-24), trimmed to three items and the
continuation: they hold the `lockupViewModel` shape YouTube draws today. Everything here breaks
silently when YouTube moves — a parser that stops finding videos, a cursor that stops paging — so a
shape it does not know must say so, never read as "nothing related". The network is an httpx
MockTransport."""
import copy
import json
from pathlib import Path
import httpx
import pytest
from app.youtube import innertube, related_scrape
FIXTURES = Path(__file__).parent / "fixtures"
FIRST = json.loads((FIXTURES / "innertube_next_first.json").read_text(encoding="utf-8"))
CONTINUATION = json.loads(
(FIXTURES / "innertube_next_continuation.json").read_text(encoding="utf-8")
)
RESULTS_HTML = (
'<script>{"INNERTUBE_API_KEY":"live-key","INNERTUBE_CLIENT_VERSION":"2.20261001"}</script>'
)
def _results(page: dict) -> list:
return page["contents"]["twoColumnWatchNextResults"]["secondaryResults"]["secondaryResults"][
"results"
]
@pytest.fixture
def net(monkeypatch):
"""Route every httpx.Client the InnerTube module opens through a handler the test sets."""
calls: list[httpx.Request] = []
state: dict = {"handler": None, "calls": calls}
def transport(request: httpx.Request) -> httpx.Response:
calls.append(request)
if request.url.path == "/results":
return httpx.Response(200, text=RESULTS_HTML)
return state["handler"](request)
real = httpx.Client
monkeypatch.setattr(
innertube.httpx,
"Client",
lambda **kw: real(transport=httpx.MockTransport(transport), **kw),
)
monkeypatch.setattr(innertube, "_config", None)
return state
def _answer(net, page, status=200):
net["handler"] = lambda request: (
httpx.Response(status, text=page)
if isinstance(page, str)
else httpx.Response(status, json=page)
)
def test_a_first_page_gives_its_videos_with_their_channel_and_the_next_cursor(net):
_answer(net, FIRST)
page = related_scrape.related("SdTZAMDKrNY")
assert [it["id"] for it in page["items"]] == ["to-lHJfK4pw", "R8V8CbuxryI", "HLKo4fJx_7k"]
first = page["items"][0]
assert first["channel_id"] == "UCtslD4DGH6PKyG_1gFAX7sg"
assert first["channel_title"] == "Alexander Amini"
assert first["title"] == "MIT 6.S191 (2025): Reinforcement Learning"
assert first["thumbnail_url"].startswith("https://i.ytimg.com/vi/to-lHJfK4pw/")
assert first["published_at"] is None and first["live_broadcast"] == "none"
assert page["next_page_token"]
body = json.loads(net["calls"][-1].content)
assert body["videoId"] == "SdTZAMDKrNY" and "continuation" not in body
assert net["calls"][-1].url.path == "/youtubei/v1/next"
def test_the_largest_thumbnail_is_taken(net):
_answer(net, FIRST)
item = related_scrape.related("SdTZAMDKrNY")["items"][0]
sources = _results(FIRST)[0]["lockupViewModel"]["contentImage"]["thumbnailViewModel"]["image"][
"sources"
]
assert item["thumbnail_url"] == sources[-1]["url"]
def test_a_continuation_page_reads_its_videos_and_sends_only_the_cursor(net):
_answer(net, CONTINUATION)
page = related_scrape.related("SdTZAMDKrNY", continuation="TOKEN", hl="hu", gl="HU")
assert len(page["items"]) == 2
assert all(it["channel_id"].startswith("UC") for it in page["items"])
assert page["next_page_token"]
body = json.loads(net["calls"][-1].content)
assert body["continuation"] == "TOKEN" and "videoId" not in body
assert body["context"]["client"]["hl"] == "hu" and body["context"]["client"]["gl"] == "HU"
def test_the_locale_defaults_to_the_topical_one(net):
_answer(net, FIRST)
related_scrape.related("SdTZAMDKrNY")
client = json.loads(net["calls"][-1].content)["context"]["client"]
assert (client["hl"], client["gl"]) == ("en", "US")
def test_a_video_by_several_channels_is_left_out(net):
page = copy.deepcopy(FIRST)
meta = _results(page)[1]["lockupViewModel"]["metadata"]["lockupMetadataViewModel"]
meta["image"] = {"avatarStackViewModel": {"avatars": []}}
_answer(net, page)
ids = [it["id"] for it in related_scrape.related("SdTZAMDKrNY")["items"]]
assert ids == ["to-lHJfK4pw", "HLKo4fJx_7k"]
def test_what_is_not_a_video_is_left_out_and_a_repeat_counts_once(net):
page = copy.deepcopy(FIRST)
results = _results(page)
playlist = copy.deepcopy(results[0])
playlist["lockupViewModel"]["contentType"] = "LOCKUP_CONTENT_TYPE_PLAYLIST"
playlist["lockupViewModel"]["contentId"] = "PLxyz"
results.insert(0, playlist)
results.insert(2, copy.deepcopy(results[1]))
results.insert(0, {"adSlotRenderer": {}})
_answer(net, page)
ids = [it["id"] for it in related_scrape.related("SdTZAMDKrNY")["items"]]
assert ids == ["to-lHJfK4pw", "R8V8CbuxryI", "HLKo4fJx_7k"]
def test_the_previous_compact_renderer_is_still_read(net):
page = copy.deepcopy(FIRST)
_results(page).insert(
0,
{
"compactVideoRenderer": {
"videoId": "oldshape001",
"title": {"simpleText": "Old shape"},
"longBylineText": {
"runs": [
{
"text": "Old Chan",
"navigationEndpoint": {"browseEndpoint": {"browseId": "UColdchan"}},
}
]
},
"thumbnail": {"thumbnails": [{"url": "s.jpg"}, {"url": "b.jpg"}]},
}
},
)
_answer(net, page)
first = related_scrape.related("SdTZAMDKrNY")["items"][0]
assert first == {
"id": "oldshape001",
"channel_id": "UColdchan",
"channel_title": "Old Chan",
"title": "Old shape",
"published_at": None,
"thumbnail_url": "b.jpg",
"live_broadcast": "none",
}
def test_the_last_page_has_no_cursor(net):
page = copy.deepcopy(FIRST)
_results(page).pop() # the continuationItemRenderer
_answer(net, page)
assert related_scrape.related("SdTZAMDKrNY")["next_page_token"] is None
def test_a_video_youtube_no_longer_has_is_an_empty_page(net):
_answer(
net,
{
"contents": {
"twoColumnWatchNextResults": {
"results": {
"results": {
"contents": [
{
"itemSectionRenderer": {
"contents": [{"backgroundPromoRenderer": {}}]
}
}
]
}
}
}
}
},
)
assert related_scrape.related("aaaaaaaaaaa") == {"items": [], "next_page_token": None}
@pytest.mark.parametrize(
"answer",
[
{"responseContext": {}}, # no watch page frame at all
{"onResponseReceivedEndpoints": [{"somethingElse": {}}]}, # a continuation we do not know
"<html>consent</html>", # not JSON
[1, 2], # JSON, not an object
],
)
def test_an_answer_of_an_unknown_shape_is_an_error_not_an_empty_list(net, answer):
_answer(net, answer)
with pytest.raises(related_scrape.ScrapeError):
related_scrape.related("SdTZAMDKrNY")
def test_a_refused_request_is_an_error_whatever_its_body_says(net):
_answer(net, FIRST, status=429)
with pytest.raises(related_scrape.ScrapeError):
related_scrape.related("SdTZAMDKrNY")
backend/tests/test_search_scrape.py
+4 -4
View File
@@ -9,7 +9,7 @@ import json
import httpx
import pytest
from app.youtube import search_scrape
from app.youtube import innertube, search_scrape
RESULTS_HTML = (
'<script>{"INNERTUBE_API_KEY":"live-key","INNERTUBE_CLIENT_VERSION":"2.20261001"}</script>'
@@ -79,11 +79,11 @@ def net(monkeypatch):
real = httpx.Client
monkeypatch.setattr(
search_scrape.httpx,
innertube.httpx,
"Client",
lambda **kw: real(transport=httpx.MockTransport(transport), **kw),
)
monkeypatch.setattr(search_scrape, "_config", None)
monkeypatch.setattr(innertube, "_config", None)
state["calls"] = calls
return state
@@ -171,7 +171,7 @@ def test_a_failed_key_fetch_falls_back_for_now_and_tries_again_next_time(net, re
with no error anywhere."""
net["handler"] = _serve(results_html=results_html)
search_scrape.search("a")
assert net["calls"][-1].url.params["key"] == search_scrape._FALLBACK_KEY
assert net["calls"][-1].url.params["key"] == innertube._FALLBACK_KEY
net["handler"] = _serve()
search_scrape.search("b")