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deepseek-harness/website/zh-CN/api/harness/web.md
2026-07-19 14:14:02 +08:00

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<!-- Generated by scripts/gen-website-api.ts — do not edit by hand. Run `pnpm run gen-website-api` to regenerate. -->
# ctx.web
`WebService` — provided by `@deepseek-ai/dsh-web`.
The web access service. Registered as `ctx.web` (one instance per context).
Selection semantics (resolved at execution time, never order-dependent):
- A configured id that is registered and `available()` → that provider.
- A configured id not registered → `WEB_PROVIDER_CONFIGURED_MISSING`.
- A configured id registered but unavailable → `WEB_PROVIDER_CONFIGURED_UNAVAILABLE`.
- No id configured, exactly one registered usable provider → that provider.
- No id configured, multiple usable providers → `WEB_PROVIDER_AMBIGUOUS`.
- No id configured, no usable provider → `WEB_PROVIDER_UNAVAILABLE`.
[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/web/web/src/index.ts#L74)
### ctx.web.registerSearchProvider(provider)
```ts website-api
/**
* Register a search provider. Throws {@link WebError} `WEB_DUPLICATE_PROVIDER`
* if its id is already registered for search. Returns a disposer; disposed
* with the calling fiber.
* @param provider - the provider; its `id` is the registry key.
* @returns the disposer that unregisters the provider.
*/
registerSearchProvider(provider: WebSearchProvider): () => void
```
Register a search provider. Throws WebError `WEB_DUPLICATE_PROVIDER` if its id is already registered for search. Returns a disposer; disposed with the calling fiber.
- `provider` — the provider; its `id` is the registry key.
**Returns** the disposer that unregisters the provider.
[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/web/web/src/index.ts#L103)
### ctx.web.registerFetchProvider(provider)
```ts website-api
/**
* Register a fetch provider. Throws {@link WebError} `WEB_DUPLICATE_PROVIDER`
* if its id is already registered for fetch. Returns a disposer; disposed
* with the calling fiber.
* @param provider - the provider; its `id` is the registry key.
* @returns the disposer that unregisters the provider.
*/
registerFetchProvider(provider: WebFetchProvider): () => void
```
Register a fetch provider. Throws WebError `WEB_DUPLICATE_PROVIDER` if its id is already registered for fetch. Returns a disposer; disposed with the calling fiber.
- `provider` — the provider; its `id` is the registry key.
**Returns** the disposer that unregisters the provider.
[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/web/web/src/index.ts#L114)
### ctx.web.search(request, signal?)
```ts website-api
/**
* Run one search through the selected provider. Resolves the provider at call
* time with the selection rules above; throws {@link WebError} when the
* capability cannot run. The seam enforces `request.maxResults` on the result:
* if the provider over-returns, `sources[]` is truncated and `truncated` set.
* @param request - the query plus result-shaping options.
* @param signal - optional cancellation signal forwarded to the provider.
* @returns the provider's results, capped to `request.maxResults`.
*/
async search(request: WebSearchRequest, signal?: AbortSignal): Promise<WebSearchResult>
```
Run one search through the selected provider. Resolves the provider at call time with the selection rules above; throws WebError when the capability cannot run. The seam enforces `request.maxResults` on the result: if the provider over-returns, `sources[]` is truncated and `truncated` set.
- `request` — the query plus result-shaping options.
- `signal` — optional cancellation signal forwarded to the provider.
**Returns** the provider's results, capped to `request.maxResults`.
[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/web/web/src/index.ts#L140)
### ctx.web.fetch(request, signal?)
```ts website-api
/**
* Retrieve one URL through the selected provider. Resolves the provider at
* call time with the selection rules above; throws {@link WebError} when the
* capability cannot run. A non-2xx response is a result, not a throw.
* @param request - the URL plus retrieval options.
* @param signal - optional cancellation signal forwarded to the provider.
* @returns the retrieval outcome; non-2xx responses resolve descriptively.
*/
async fetch(request: WebFetchRequest, signal?: AbortSignal): Promise<WebFetchResult>
```
Retrieve one URL through the selected provider. Resolves the provider at call time with the selection rules above; throws WebError when the capability cannot run. A non-2xx response is a result, not a throw.
- `request` — the URL plus retrieval options.
- `signal` — optional cancellation signal forwarded to the provider.
**Returns** the retrieval outcome; non-2xx responses resolve descriptively.
[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/web/web/src/index.ts#L157)