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24 commits

Author SHA1 Message Date
9e95ce7b53 perf: shared http.Transport with tuned connection pooling
Add internal/httpclient package as a singleton RoundTripper used by
all outbound engine requests (search, engines, autocomplete, upstream).

Key Transport settings:
- MaxIdleConnsPerHost = 20  (up from Go default of 2)
- MaxIdleConns = 100
- IdleConnTimeout = 90s
- DialContext timeout = 5s

Previously, the default transport limited each host to 2 idle connections,
forcing a new TCP+TLS handshake on every search for each engine. With
12 engines hitting the same upstream hosts in parallel, connections
were constantly recycled. Now warm connections are reused across all
goroutines and requests.
2026-03-23 14:26:26 +00:00
8e9aae062b rename: kafka → samsa
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Full project rename from kafka to samsa (after Gregor Samsa, who
woke one morning from uneasy dreams to find himself transformed).

- Module: github.com/metamorphosis-dev/kafka → samsa
- Binary: cmd/kafka/ → cmd/samsa/
- CSS: kafka.css → samsa.css
- UI: all 'kafka' product names, titles, localStorage keys → samsa
- localStorage keys: kafka-theme → samsa-theme, kafka-engines → samsa-engines
- OpenSearch: ShortName, LongName, description, URLs updated
- AGPL headers: 'kafka' → 'samsa'
- Docs, configs, examples updated
- Cache key prefix: kafka: → samsa:
2026-03-22 23:44:55 +00:00
df67492602 feat: add Stack Overflow search engine
Uses the Stack Exchange API v3 (/search/advanced) to find questions
sorted by relevance. No API key required (300 req/day); optionally
configure via STACKOVERFLOW_KEY env var or [engines.stackoverflow].

Results include score, answer count, view count, and tags in the
snippet. Assigned to the 'it' category, triggered by the IT category
tab or explicit engine selection.

6 tests covering parsing, edge cases, and helpers.
2026-03-22 22:29:34 +00:00
2b072e4de3 feat: add image search with Bing, DuckDuckGo, and Qwant engines
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Three new image search engines:
- bing_images: Bing Images via RSS endpoint
- ddg_images: DuckDuckGo Images via VQD API
- qwant_images: Qwant Images via v3 search API

Frontend:
- Image grid layout with responsive columns
- image_item template with thumbnail, title, and source metadata
- Hover animations and lazy loading
- Grid activates automatically when category=images

Backend:
- category=images routes to image engines via planner
- Image engines registered in factory and engine allowlist
- extractImgSrc helper for parsing thumbnail URLs from HTML
- IsImageSearch flag on PageData for template layout switching
2026-03-22 16:49:24 +00:00
b3e3123612 security: fix build errors, add honest Google UA, sanitize error msgs
- Fix config validation: upstream URLs allow private IPs (self-hosted)
- Fix util.SafeURLScheme to return parsed URL
- Replace spoofed GSA User-Agent with honest Kafka UA
- Sanitize all engine error messages (strip response bodies)
- Replace unused body reads with io.Copy(io.Discard, ...) for reuse
- Fix pre-existing braveapi_test using wrong struct type
- Fix ratelimit test reference to limiter variable
- Update ratelimit tests for new trusted proxy behavior
2026-03-22 16:27:49 +00:00
da367a1bfd security: harden against SAST findings (criticals through mediums)
Critical:
- Validate baseURL/sourceURL/upstreamURL at config load time
  (prevents XML injection, XSS, SSRF via config/env manipulation)
- Use xml.Escape for OpenSearch XML template interpolation

High:
- Add security headers middleware (CSP, X-Frame-Options, HSTS, etc.)
- Sanitize result URLs to reject javascript:/data: schemes
- Sanitize infobox img_src against dangerous URL schemes
- Default CORS to deny-all (was wildcard *)

Medium:
- Rate limiter: X-Forwarded-For only trusted from configured proxies
- Validate engine names against known registry allowlist
- Add 1024-char max query length
- Sanitize upstream error messages (strip raw response bodies)
- Upstream client validates URL scheme (http/https only)

Test updates:
- Update extractIP tests for new trusted proxy behavior
2026-03-22 16:22:27 +00:00
2d22a8cdbb feat: add Brave web search scraper engine
New brave.go: scrapes https://search.brave.com directly.
Extracts title, URL, snippet, and favicon from Brave's HTML.
No API key required.

Rename existing BraveAPIEngine (was BraveEngine) to avoid collision
with the new scraper. API engine stays as 'braveapi', scraper as 'brave'.
2026-03-22 16:01:49 +00:00
7969b724de fix(engines): remove unsupported lookahead from Google regex
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Go's regexp package doesn't support Perl lookahead (?=...). Removing
the unnecessary lookahead since each MjjYud div is self-contained.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-22 14:16:04 +01:00
d21e9189b8 fix(engines): validate Wikipedia language codes to prevent SSRF
Wikipedia language subdomain was derived from user input without
validation, allowing attackers to redirect requests via malicious
language values like "evil.com.attacker.com". Added a whitelist of
valid Wikipedia language codes to prevent this.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-22 13:22:52 +01:00
f172da33ef fix(engines): cap Brave API offset to 9 to avoid 422 error
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Brave API only supports offset values 0-9. When pageno > 1 with
resultsPerPage=20, offset exceeded this limit causing 422 errors.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-22 12:01:25 +00:00
5b942a5fd6 refactor: clean up verbose and redundant comments
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Trim or remove comments that:
- State the obvious (function names already convey purpose)
- Repeat what the code clearly shows
- Are excessively long without adding value

Keep comments that explain *why*, not *what*.
2026-03-22 11:10:50 +00:00
7be03b4017 license: change from MIT to AGPLv3
Update LICENSE file and add AGPL header to all source files.

AGPLv3 ensures that if someone runs Kafka as a network service and
modifies it, they must release their source code under the same license.
2026-03-22 08:27:23 +00:00
f1436310eb fix: regexp.DotAll flag in google engine and Metadata field removal
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- google.go: use inline (?s) flag instead of regexp.DotAll second arg
- youtube.go: remove Metadata field (not in MainResult contract)
- config_test.go: fix expected engine count from 9 to 11 (google+youtube)
2026-03-22 02:54:12 +00:00
a7f594b7fa feat: add YouTube engine with config file and env support
YouTube Data API v3 engine:
- Add YouTubeConfig to EnginesConfig with api_key field
- Add YOUTUBE_API_KEY env override
- Thread *config.Config through search service to factory
- Factory falls back to env vars if config fields are empty
- Update config.example.toml with youtube section

Also update default local_ported to include google and youtube.
2026-03-22 01:57:13 +00:00
1689cab9bd feat: add YouTube engine via Data API v3
Uses the official YouTube Data API v3. Requires YOUTUBE_API_KEY
environment variable (free from Google Cloud Console).

Returns video results with title, description, channel, publish
date, and thumbnail URL. Falls back gracefully if no API key.
2026-03-22 01:53:19 +00:00
31fdd5e06f Merge branch 'feat/google-engine', remote-tracking branch 'origin/main' 2026-03-22 01:35:20 +00:00
4be9cf2725 feat: add Google engine using GSA User-Agent scraping
SearXNG approach: use Google Search Appliance (GSA) User-Agent
pool — these are whitelisted enterprise identifiers Google trusts.

Key techniques:
- GSA User-Agent (iPhone OS + GSA/ version) instead of Chrome desktop
- CONSENT=YES+ cookie to bypass EU consent wall
- Parse /url?q= redirector URLs (unquote + strip &sa= params)
- div.MjjYud class for result containers (SearXNG selector)
- data-sncf divs for snippets
- detect sorry.google.com blocks
- Suggestions from ouy7Mc class cards
2026-03-22 01:29:46 +00:00
fcd9be16df refactor: remove SearXNG references and rename binary to kafka
- Rename cmd/searxng-go to cmd/kafka
- Remove all SearXNG references from source comments while keeping
  "SearXNG-compatible API" in user-facing docs
- Update binary paths in README, CLAUDE.md, and Dockerfile
- Update log message to "kafka starting"

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-22 01:47:03 +01:00
0d3f3c19d7 fix: add missing engines to defaultPortedEngines
duckduckgo, github, reddit, and bing were registered in factory.go
and config.go but missing from planner.go, so they were silently
skipped when LOCAL_PORTED_ENGINES was not set.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-22 00:13:57 +01:00
6346fb7155 chore: update Go module path to github.com/metamorphosis-dev/kafka
Module path now matches the GitHub mirror location.
All internal imports updated across 35+ files.
2026-03-21 19:42:01 +00:00
e5295fa69d chore: rename project from gosearch to kafka
A search engine named after a man who proved answers don't exist.

Renamed everywhere user-facing:
- Brand name, UI titles, OpenSearch description, CSS filename
- Docker service name, NixOS module (services.kafka)
- Cache key prefix (kafka:), User-Agent strings (kafka/0.1)
- README, config.example.toml, flake.nix descriptions

Kept unchanged (internal):
- Go module path: github.com/ashie/gosearch
- Git repository URL: git.ashisgreat.xyz/penal-colony/gosearch
- Binary entrypoint: cmd/searxng-go
2026-03-21 19:20:47 +00:00
a8ab29b23a fix: fix DDG and Bing parsers — verified with live tests
DuckDuckGo:
- Fixed parser to handle single-quoted class attributes (class='result-link')
- Decode DDG tracking URLs (uddg= parameter) to extract real URLs
- Match snippet extraction to actual DDG Lite HTML structure (</td> terminator)

Bing:
- Switched from HTML scraping (blocked by JS detection) to RSS endpoint
  (?format=rss) which returns parseable XML
- Added JSON API response parsing as fallback
- Returns graceful unresponsive_engines entry when blocked

Live test results:
- DuckDuckGo: 9 results 
- GitHub: 10 results (14,768 total) 
- Bing: 10 results via RSS 
- Reddit: skipped (403 from sandbox, needs browser-like context)
2026-03-21 16:57:02 +00:00
df8fe9474b feat: add DuckDuckGo, GitHub, Reddit, and Bing engines
- DuckDuckGo: scrapes Lite HTML endpoint for results
  - Language-aware region mapping (de→de-de, ja→jp-jp, etc.)
  - HTML parser extracts result links and snippets from DDG Lite markup
  - Shared html_helpers.go with extractAttr, stripHTML, htmlUnescape

- GitHub: uses public Search API (repos, sorted by stars)
  - No auth required (10 req/min unauthenticated)
  - Shows stars, language, topics, last updated date
  - Paginated via GitHub's page parameter

- Reddit: uses public JSON search API
  - Respects safesearch (skips over_18 posts)
  - Shows subreddit, score, comment count
  - Links self-posts to the thread URL

- Bing: scrapes web search HTML (b_algo containers)
  - Extracts titles, URLs, and snippets from Bing's result markup
  - Handles Bing's tracking URL encoding

- Updated factory, config defaults, and config.example.toml
- Full test suite: unit tests for all engines, HTML parsing tests,
  region mapping tests, live request tests (skipped in short mode)

9 engines total: wikipedia, arxiv, crossref, braveapi, qwant,
duckduckgo, github, reddit, bing
2026-03-21 16:52:11 +00:00
dc44837219 feat: build Go-based SearXNG-compatible search service
Implement an API-first Go rewrite with local engine adapters, upstream fallback, and Nix-based tooling so searches can run without matching the original UI while preserving response compatibility.

Made-with: Cursor
2026-03-20 20:34:08 +01:00