Trust embedded Zillow photo sets without visible count

This commit is contained in:
2026-03-28 03:40:50 -05:00
parent 446d43cc78
commit ece8fc548f
5 changed files with 86 additions and 7 deletions

View File

@@ -182,6 +182,7 @@ node zillow-photos.js "https://www.zillow.com/homedetails/4141-Whiteley-Dr-Corpu
What it does:
- opens the listing page with CloakBrowser
- first checks whether the rendered listing shell already exposes a complete photo set in Zillow's embedded `__NEXT_DATA__` payload
- if the visible `See all XX photos` count is missing, still trusts the embedded set when the page metadata confirms the count or when the embedded set is already clearly substantial
- only tries the `See all photos` / `See all X photos` entry point when the initial structured data is incomplete
- returns direct `photos.zillowstatic.com` image URLs as JSON
- fails fast with a timeout if the browser-backed extraction stalls

View File

@@ -158,6 +158,7 @@ The discovery scripts are purpose-built for the common address-to-listing workfl
The photo scripts are purpose-built for the common `See all photos` / `Show all photos` workflow:
- open the listing page
- on Zillow, first inspect the rendered listing shell for a complete structured `__NEXT_DATA__` photo set
- if the visible page count is missing, trust the structured Zillow photo set when page metadata confirms the count or when the embedded set is already clearly substantial
- only force the all-photos click path when the initial Zillow page data is incomplete
- wait for the resulting photo page or scroller view when the click path is actually needed
- extract direct image URLs from the rendered page

View File

@@ -58,11 +58,29 @@ export function extractZillowStructuredPhotoCandidatesFromNextDataScript(scriptT
return out;
}
export function shouldUseStructuredZillowPhotos(candidates, expectedPhotoCount) {
const DEFAULT_MINIMUM_TRUSTED_STRUCTURED_PHOTO_COUNT = 12;
export function shouldUseStructuredZillowPhotos(candidates, options = {}) {
const count = Array.isArray(candidates) ? candidates.length : 0;
if (!Number.isFinite(expectedPhotoCount) || expectedPhotoCount <= 0) {
return false;
const normalizedOptions =
typeof options === "number"
? { expectedPhotoCount: options }
: options && typeof options === "object"
? options
: {};
const expectedPhotoCount = Number(normalizedOptions.expectedPhotoCount || 0);
const fallbackPhotoCount = Number(normalizedOptions.fallbackPhotoCount || 0);
const minimumTrustCount = Number(
normalizedOptions.minimumTrustCount || DEFAULT_MINIMUM_TRUSTED_STRUCTURED_PHOTO_COUNT
);
if (Number.isFinite(expectedPhotoCount) && expectedPhotoCount > 0) {
return count >= expectedPhotoCount;
}
return count >= expectedPhotoCount;
if (Number.isFinite(fallbackPhotoCount) && fallbackPhotoCount > 0) {
return count >= fallbackPhotoCount;
}
return count >= minimumTrustCount;
}

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@@ -84,5 +84,38 @@ test("shouldUseStructuredZillowPhotos returns false when structured photos are i
url: `https://photos.zillowstatic.com/fp/photo-${index + 1}-p_d.jpg`,
}));
assert.equal(shouldUseStructuredZillowPhotos(candidates, 29), false);
assert.equal(shouldUseStructuredZillowPhotos(candidates, { expectedPhotoCount: 29 }), false);
});
test("shouldUseStructuredZillowPhotos returns true when meta-description count matches even without visible page count", () => {
const candidates = Array.from({ length: 29 }, (_, index) => ({
url: `https://photos.zillowstatic.com/fp/photo-${index + 1}-p_d.jpg`,
}));
assert.equal(
shouldUseStructuredZillowPhotos(candidates, { expectedPhotoCount: null, fallbackPhotoCount: 29 }),
true
);
});
test("shouldUseStructuredZillowPhotos returns true for a substantial structured set when no count signal is available", () => {
const candidates = Array.from({ length: 18 }, (_, index) => ({
url: `https://photos.zillowstatic.com/fp/photo-${index + 1}-p_d.jpg`,
}));
assert.equal(
shouldUseStructuredZillowPhotos(candidates, { expectedPhotoCount: null, fallbackPhotoCount: null }),
true
);
});
test("shouldUseStructuredZillowPhotos returns false for a tiny structured set when no count signal is available", () => {
const candidates = Array.from({ length: 5 }, (_, index) => ({
url: `https://photos.zillowstatic.com/fp/photo-${index + 1}-p_d.jpg`,
}));
assert.equal(
shouldUseStructuredZillowPhotos(candidates, { expectedPhotoCount: null, fallbackPhotoCount: null }),
false
);
});

View File

@@ -35,6 +35,17 @@ async function getAnnouncedPhotoCount(page) {
});
}
async function getMetaDescriptionPhotoCount(page) {
return page.evaluate(() => {
const content =
document.querySelector('meta[name="description"]')?.getAttribute("content") ||
document.querySelector('meta[property="og:description"]')?.getAttribute("content") ||
"";
const match = content.match(/\b(\d+)\s+photos\b/i);
return match ? Number(match[1]) : null;
});
}
function collapseZillowPhotos(candidates) {
const byBaseId = new Map();
@@ -137,14 +148,29 @@ export async function extractZillowPhotos(rawUrl, options = {}) {
await dismissCommonOverlays(page);
const expectedPhotoCount = await getAnnouncedPhotoCount(page);
const fallbackPhotoCount = await getMetaDescriptionPhotoCount(page);
const initialStructuredPhotos = normalizeZillowPhotos(
await collectZillowStructuredPhotoCandidates(page)
);
if (shouldUseStructuredZillowPhotos(initialStructuredPhotos, expectedPhotoCount)) {
if (
shouldUseStructuredZillowPhotos(initialStructuredPhotos, {
expectedPhotoCount,
fallbackPhotoCount,
})
) {
const notes = [
"The rendered Zillow listing shell already exposed a complete structured photo set, so extraction completed without relying on the all-photos click path.",
];
if (!expectedPhotoCount && fallbackPhotoCount) {
notes.push(
`Trusted the embedded Zillow photo set using the page metadata count of ${fallbackPhotoCount} photos.`
);
} else if (!expectedPhotoCount && !fallbackPhotoCount) {
notes.push(
"Trusted a substantial embedded Zillow photo set even though the page did not expose an explicit photo count."
);
}
if (attempt > 1) {
notes.push(
"Recovered after retrying Zillow photo extraction once because the first browser session closed unexpectedly."
@@ -156,7 +182,7 @@ export async function extractZillowPhotos(rawUrl, options = {}) {
finalUrl: page.url(),
title: await page.title(),
clickedLabel: null,
expectedPhotoCount,
expectedPhotoCount: expectedPhotoCount || fallbackPhotoCount || null,
complete: true,
photoCount: initialStructuredPhotos.length,
imageUrls: initialStructuredPhotos.map((photo) => photo.url),