23 lines
988 B
JavaScript
23 lines
988 B
JavaScript
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// Wrap the default fetch call due to issues with illegal invocations
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// in some environments:
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// https://stackoverflow.com/questions/69876859/why-does-bind-fix-failed-to-execute-fetch-on-window-illegal-invocation-err
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// @ts-expect-error Broad typing to support a range of fetch implementations
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const DEFAULT_FETCH_IMPLEMENTATION = (...args) => fetch(...args);
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const LANGSMITH_FETCH_IMPLEMENTATION_KEY = Symbol.for("ls:fetch_implementation");
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/**
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* Overrides the fetch implementation used for LangSmith calls.
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* You should use this if you need to use an implementation of fetch
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* other than the default global (e.g. for dealing with proxies).
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* @param fetch The new fetch functino to use.
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*/
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export const overrideFetchImplementation = (fetch) => {
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globalThis[LANGSMITH_FETCH_IMPLEMENTATION_KEY] = fetch;
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};
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/**
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* @internal
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*/
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export const _getFetchImplementation = () => {
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return (globalThis[LANGSMITH_FETCH_IMPLEMENTATION_KEY] ??
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DEFAULT_FETCH_IMPLEMENTATION);
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};
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