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React Native

Send a REST Request with a Streamed Body

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Demonstrates Rest.FullRequestStream, which sends a complete request whose body is read from a Stream, then returns the response body as text.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background. Streaming the body is appropriate for large uploads because the data is read incrementally from the source (here a file) rather than being held entirely in memory.

Chilkat React Native Downloads

React Native
import { Rest, Stream } from '@chilkat/react-native'

async function chilkatExample() {
  const rest = new Rest();
  const bTls = true;
  const bAutoReconnect = true;
  try {
    await rest.connectAsync('example.com', 443, bTls, bAutoReconnect);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  // The file paths are relative to the application's current working directory.  Absolute paths
  // may also be used.  Supply the paths appropriate to your own environment.

  // The request body is read from a Stream.  Here the stream's source is a local file, which is
  // appropriate for large uploads because the data need not be held entirely in memory.
  const bodyStream = new Stream();
  bodyStream.sourceFile = 'qa_data/upload.json';

  rest.addHeader('Content-Type', 'application/json');

  // The 3rd argument is the Stream that supplies the request body.
  let responseText: string;
  try {
    responseText = await rest.fullRequestStreamAsync('POST', '/api/upload', bodyStream);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  console.log(responseText);
}