In Node. js 14 you can also use async iterators to read body ; however, be careful to catch errors -- the longer a response runs, the more likely it is to encounter an error. js 12 you can also use async iterators to read body ; however, async iterators with streams did not mature until Node. js 14, so you need to do some extra work to ensure you handle errors directly from the stream and wait on it response to fully close.

Unlike browsers, you can access raw Set-Cookie headers manually using Headers. This is a node-fetch only API. If you for some reason need to post a stream coming from any arbitrary place, then you can append a Blob or a File look-a-like item. The stream must return any async iterable object as long as it yields Uint8Array or Buffer so Node.

Readable streams and whatwg streams works just fine. You may cancel requests with AbortController. A suggested implementation is abort-controller. See test cases for more examples. Note: when body is a Stream , Content-Length is not set automatically. The agent option allows you to specify networking related options which are out of the scope of Fetch, including and not limited to the following:.

See http. Agent for more information. In addition, the agent option accepts a function that returns http s. Agent instance given current URL , this is useful during a redirection chain across HTTP and HTTPS protocol.

Stream on Node. Because of that, when you are writing an isomorphic app and using res. clone , it will hang with large response in Node. If for some reason you don't like the solution above, since 3. x you are able to modify the highWaterMark option:.

Passed through to the insecureHTTPParser option on http s. request for more information. node-fetch gives you the typical basic filtered response instead. An HTTP S request containing information about URL, method, headers, and the body.

This class implements the Body interface. Constructs a new Request object. The constructor is identical to that in the browser. In most cases, directly fetch url, options is simpler than creating a Request object. Constructs a new Response object. Because Node. js does not implement service workers for which this class was designed , one rarely has to construct a Response directly.

Convenience property representing if the request ended normally. Will evaluate to true if the response status was greater than or equal to but smaller than Convenience property representing if the request has been redirected at least once. Will evaluate to true if the internal redirect counter is greater than 0. Convenience property representing the response's type. node-fetch only supports 'default' and 'error' and does not make use of filtered responses.

This class allows manipulating and iterating over a set of HTTP headers. All methods specified in the Fetch Standard are implemented. Construct a new Headers object. init can be either null , a Headers object, an key-value map object or any iterable object.

Body is an abstract interface with methods that are applicable to both Request and Response classes. Data are encapsulated in the Body object. Note that while the Fetch Standard requires the property to always be a WHATWG ReadableStream , in node-fetch it is a Node. js Readable stream. A boolean property for if this body has been consumed. Per the specs, a consumed body cannot be used again. formData this comes from the idea that Service Worker can intercept such messages before it's sent to the server to alter them.

An operational error in the fetching process. See ERROR-HANDLING. md for more info. An Error thrown when the request is aborted in response to an AbortSignal 's abort event. It has a name property of AbortError. MD for more info. Since 3. x types are bundled with node-fetch , so you don't need to install any additional packages.

For older versions please use the type definitions from DefinitelyTyped :. npm i node-fetch. Git github. a month ago.

Consider supporting us on our Open Collective:. import fetch from 'node-fetch' ;. args ;. js import fetch , { Blob , blobFrom , blobFromSync , File , fileFrom , fileFromSync , FormData , Headers , Request , Response , } from 'node-fetch' if! fetch { globalThis. js import '. text ; console. log body ;. json ; console. log data ;. log error ; }. png' ; if! body , createWriteStream '. png' ;. Jim Cramer.

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