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React Native

Add a Path Substitution Parameter to a REST Request

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Demonstrates Rest.AddPathParam, which adds or replaces a path-substitution parameter. Before a request is sent, each occurrence of the name in the URI path is replaced with its value.

Background. Path parameters keep a URI path template readable—placeholders such as {userId} are substituted with concrete values just before the request is sent.

Chilkat React Native Downloads

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

async function chilkatExample() {
  const rest = new Rest();

  // Connect to the REST server.  The 3rd argument enables TLS (use true for HTTPS on port 443),
  // and the 4th enables automatic reconnection if the connection is dropped between requests.
  const bTls = true;
  const bAutoReconnect = true;
  try {
    await rest.connectAsync('example.com', 443, bTls, bAutoReconnect);
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  // Add path-substitution parameters.  Before a request is sent, each occurrence of the name in the
  // URI path is replaced with the value.  This keeps the path template readable.
  rest.addPathParam('{userId}', '12345');
  rest.addPathParam('{orderId}', '98765');

  // The placeholders in the path are replaced before the request is sent.
  let responseText: string;
  try {
    responseText = await rest.fullRequestNoBodyAsync('GET', '/users/{userId}/orders/{orderId}');
  } catch {
    console.log(rest.lastErrorText);
    return;
  }

  console.log(responseText);
}