Switch to Google's favicon service for thumbnails #330
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Replace custom hackers-thumbnails service with Google's favicon API which extracts the domain from URLs and requests 128px favicons.
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Caution Review failedThe pull request is closed. WalkthroughThumbnail loading now uses Google's favicon service by extracting the domain and requesting a 128px favicon; the embedded web view implementation was refactored to use a WebView wrapper with async loading, navigation monitoring, and UI controls for back/forward/reload and open-in-Safari. Changes
Sequence Diagram(s)sequenceDiagram
autonumber
actor User
participant UI as EmbeddedWebView UI
participant WebView as WebView(page)
participant WebPage as WebPage model
participant System as Browser/System (Safari)
User->>UI: Tap URL / Navigation controls
UI->>WebView: load(URL) [async task]
WebView->>WebView: start navigation
WebView->>WebPage: update navigation state (URL, title, history)
WebPage-->>WebView: state snapshot
WebView->>UI: notify via model bindings
UI->>User: update toolbar (back/forward enabled, title)
alt Open in Safari
User->>UI: Tap "Open in Safari"
UI->>System: openURL(currentURL)
end
Estimated code review effort🎯 4 (Complex) | ⏱️ ~45 minutes
Poem
Pre-merge checks and finishing touches❌ Failed checks (1 warning)
✅ Passed checks (2 passed)
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Actionable comments posted: 1
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DesignSystem/Sources/DesignSystem/Components/ThumbnailView.swift(1 hunks)
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🔇 Additional comments (1)
DesignSystem/Sources/DesignSystem/Components/ThumbnailView.swift (1)
20-20: Good defensive programming.The guard clause properly handles URLs without a host, preventing potential crashes or malformed thumbnail URLs.
| components.host = "www.google.com" | ||
| components.path = "/s2/favicons" | ||
| components.queryItems = [ | ||
| URLQueryItem(name: "domain", value: host), | ||
| URLQueryItem(name: "sz", value: "128") | ||
| ] |
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🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
# First, find and examine the ThumbnailView.swift file
find . -name "ThumbnailView.swift" -type fRepository: weiran/Hackers
Length of output: 124
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#!/bin/bash
# Read the full ThumbnailView.swift file with line numbers
cat -n ./DesignSystem/Sources/DesignSystem/Components/ThumbnailView.swiftRepository: weiran/Hackers
Length of output: 1982
🏁 Script executed:
#!/bin/bash
# Search for any documentation or comments about this favicon service change
rg -i "favicon|hackers-thumbnails" --type swift --type markdown --type txt -C 3Repository: weiran/Hackers
Length of output: 813
🌐 Web query:
Google /s2/favicons official API documentation
💡 Result:
Short answer: Google does not publish an official, full API doc for /s2/favicons. The endpoint commonly used is:
https://www.google.com/s2/favicons?domain=example.com
Optional params (commonly supported by clients): sz (size), domain_url (full URL). It returns a PNG favicon (fallback to a generic icon if none). This endpoint is widely used but unofficial/undocumented and has no guaranteed SLA or formal rate limits. [1][2][3]
Sources:
- Community/Stack Overflow discussion noting the endpoint is not a public API. [1]
- Community-written reference/gist with usage examples (domain, sz, domain_url). [2]
- Third‑party documentation that documents usage and warns it’s unofficial. [3]
🏁 Script executed:
#!/bin/bash
# Check if there are any tests for ThumbnailView to understand expected behavior
find . -name "*ThumbnailView*" -o -name "*test*" -o -name "*Test*" | grep -i thumbnailRepository: weiran/Hackers
Length of output: 124
Verify privacy policy alignment and consider risks of undocumented external dependency.
The Google /s2/favicons endpoint is undocumented and unofficial with no SLA or rate limits, creating architectural risks:
-
Privacy: User browsing domains are sent to Google's servers. Verify this aligns with your privacy policy and complies with GDPR/CCPA requirements.
-
Reliability: Google could change, rate-limit, or disable this endpoint without notice. While
AsyncImagegracefully falls back to a placeholder, unexpected behavior or degraded performance could occur. -
Documentation: Document why this endpoint was chosen over alternatives (self-hosted favicon service, CDN, etc.) for future maintainers.
Consider: documenting this decision, verifying privacy implications with your legal/compliance team, and evaluating whether a self-hosted or documented alternative is more appropriate for production use.
🤖 Prompt for AI Agents
In DesignSystem/Sources/DesignSystem/Components/ThumbnailView.swift around lines
23–28, the code uses Google's undocumented /s2/favicons endpoint which exposes
user browsing domains to an external provider and carries reliability risk;
update the codebase by (1) adding an in-file comment documenting why this
endpoint was chosen and listing risks (privacy, rate-limits, lack of SLA), (2)
moving the host/path into a configurable constant or environment-driven setting
so it can be switched to a self-hosted or documented CDN service without code
changes, (3) adding a short TODO to consult legal/compliance to confirm
GDPR/CCPA alignment before shipping, and (4) adding a note to the project
documentation/release notes describing the decision and recommended alternatives
(self-hosted favicon service, caching proxy, or approved third-party) so future
maintainers can revisit the choice.
weiran
deleted the
claude/google-favicon-service-01RSQ3EZ5Lcw4kruHR2kh5JA
branch
2 participants
Replace custom hackers-thumbnails service with Google's favicon API
which extracts the domain from URLs and requests 128px favicons.
Summary by CodeRabbit
Improvements
New Features
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