feat(core): add more file extensions to ignore in HTML link extraction

[Aman071106]

feat(core): add more file extensions to ignore in HTML link extraction

Description

This PR enhances the HTML link extraction utility in
libs/core/langchain_core/utils/html.py by expanding the SUFFIXES_TO_IGNORE list to include additional common binary file extensions:

• .webp
• .pdf
• .docx
• .xlsx
• .pptx
• .pptm

These file types are non-HTML, non-crawlable resources. Ignoring them prevents find_all_links and extract_sub_links from mistakenly treating such binary assets as navigable links. This improves link filtering, reduces unnecessary crawling, and aligns behavior with typical web scraping expectations.

Summary of Changes

• Updated libs/core/langchain_core/utils/html.py: Added .webp, .pdf, .docx, .xlsx, .pptx, .pptm to SUFFIXES_TO_IGNORE.

Related Issues

N/A

Verification

• ruff check libs/core/langchain_core/utils/html.py: Passed
• mypy libs/core/langchain_core/utils/html.py: Passed
• pytest libs/core/tests/unit_tests/utils/test_html.py: Passed (11 tests)

[codspeed-hq]

CodSpeed Performance Report

Merging this PR will improve performance by 23.98%

_{Comparing Aman071106:enhancement/ignore-more-suffixes (df8d0e8) with master (50c5bb5)¹}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

⚡ 12 improved benchmarks
✅ 1 untouched benchmark
⏩ 21 skipped benchmarks²

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	test_import_time[LangChainTracer]	543.6 ms	449.3 ms	+20.99%
⚡	WallTime	test_import_time[RunnableLambda]	616.6 ms	497.4 ms	+23.98%
⚡	WallTime	test_import_time[BaseChatModel]	622.6 ms	538.8 ms	+15.56%
⚡	WallTime	test_import_time[HumanMessage]	299.5 ms	260.6 ms	+14.91%
⚡	WallTime	test_import_time[Runnable]	584.6 ms	497.1 ms	+17.59%
⚡	WallTime	test_import_time[InMemoryRateLimiter]	204.1 ms	172.9 ms	+18.02%
⚡	WallTime	test_import_time[tool]	599.7 ms	520 ms	+15.32%
⚡	WallTime	test_import_time[InMemoryVectorStore]	739.7 ms	600.3 ms	+23.22%
⚡	WallTime	test_import_time[CallbackManager]	539.3 ms	468.8 ms	+15.02%
⚡	WallTime	test_import_time[Document]	217 ms	184.4 ms	+17.71%
⚡	WallTime	test_import_time[ChatPromptTemplate]	766.6 ms	629.5 ms	+21.78%
⚡	WallTime	test_import_time[PydanticOutputParser]	648.4 ms	540 ms	+20.07%

Footnotes

1. No successful run was found on master (d383f00) during the generation of this report, so 50c5bb5 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 21 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩