React Native

Read the REST Response Body into a StringBuilder

Demonstrates Rest.ReadRespSb, which reads the response body as text into a StringBuilder, replacing its previous contents.

Background. The staged request model separates sending from reading: a SendReq method transmits the request, ReadResponseHeader reads the status line and headers, and a ReadResp method reads the body. This gives fine control over large or streamed messages compared with the single-call full-request methods.

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React Native

import { Rest, StringBuilder } 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;
  }

  try {
    await rest.sendReqNoBodyAsync('GET', '/api/items/123');
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  const statusCode = await rest.readResponseHeaderAsync();
  if (statusCode < 0) {
    console.log(rest.lastErrorText);
    return;
  }

  // Read the response body as text into a StringBuilder, replacing its previous contents.
  const sbResponse = new StringBuilder();
  try {
    await rest.readRespSbAsync(sbResponse);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  let responseBody: string;
  try {
    responseBody = sbResponse.getAsString();
  } catch {
    console.log(sbResponse.lastErrorText);
    return;
  }

  console.log(responseBody);
}