Add Perplexity websearch component#11231
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Adds a `PerplexityWebSearch` component that uses the Perplexity Search API (https://api.perplexity.ai/search) to retrieve web results, mirroring the existing `SearchApiWebSearch` and `SerperDevWebSearch` components. The component supports both sync (`run`) and async (`run_async`) invocation, and exposes the API's optional filters (country, recency, domain, language, date filters, max_tokens_per_page) via a `search_params` dict. Outgoing requests include an `X-Pplx-Integration: haystack-core/<version>` header for attribution. Tests cover serialization, top_k slicing, the attribution header, search params propagation, timeouts, and error handling, mirroring the existing websearch test suites. Signed-off-by: James Liounis <james.liounis@perplexity.ai>
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Summary
Adds a
PerplexityWebSearchcomponent that uses the Perplexity Search API to retrieve web results, mirroring the existingSearchApiWebSearchandSerperDevWebSearchcomponents.run) and async (run_async) interfaces, both returningdocumentsandlinks.Secret.from_env_var("PERPLEXITY_API_KEY").top_kmaps to the API'smax_results(1–20).search_paramsexposes optional filters:country,search_recency_filter,search_domain_filter,search_language_filter,last_updated_after_filter,last_updated_before_filter,search_after_date_filter,search_before_date_filter, andmax_tokens_per_page.X-Pplx-Integration: haystack-core/<version>for attribution.The component is implemented as a thin direct HTTP wrapper using
httpx(already a Haystack dependency), so no new third-party packages are introduced.Test plan
test/components/websearch/test_perplexity.pycover serialization,top_kslicing, attribution-header presence, search-params propagation, timeout handling, request errors, and bad response codes (sync + async). 17 unit tests pass; 2 integration tests are skipped withoutPERPLEXITY_API_KEY.ruff checkandruff format --checkpass on changed files.test/components/websearch/suite still passes (49 passed, 6 skipped).releasenotes/notes/.Related
Companion PR adding
perplexity-haystackas a dedicated package indeepset-ai/haystack-core-integrations(#3262) covers the integrations-package surface; this PR adds the component to Haystack core alongside the other built-in web search components.