In this guide, you'll learn how to generate a **TypeScript SDK** for your FastAPI backend.

## Open Source SDK Generators { #open-source-sdk-generators }

A versatile option is the <a href="https://openapi-generator.tech/" class="external-link" target="_blank">OpenAPI Generator</a>, which supports **many programming languages** and can generate SDKs from your OpenAPI specification.

        return null;
    }

    /**
     * Adds a thumbnail generator to the manager.
     *
     * @param generator the thumbnail generator to add
     */
    public void add(final ThumbnailGenerator generator) {
        if (generator.isAvailable()) {
            if (logger.isDebugEnabled()) {
                logger.debug("{} is available.", generator.getName());
            }
            generatorList.add(generator);

  owner_login: piccolo-orm
  owner_html_url: https://github.com/piccolo-orm
- name: openapi-python-client
  html_url: https://github.com/openapi-generators/openapi-python-client
  stars: 1667
  owner_login: openapi-generators
  owner_html_url: https://github.com/openapi-generators
- name: langchain-serve
  html_url: https://github.com/jina-ai/langchain-serve
  stars: 1632
  owner_login: jina-ai

        generator.setCommandTimeout(100L); // Very short timeout
        generator.setCommandDestroyTimeout(50L);

        // Test that timeout values are set (we can't verify execution without components)
        assertTrue("Timeout values should be configurable", true);

        // Test edge cases
        generator.setCommandTimeout(0L);
        generator.setCommandTimeout(-1L);

Takes an async generator or a normal generator/iterator and streams the response body.

{* ../../docs_src/custom_response/tutorial007.py hl[2,14] *}

#### Using `StreamingResponse` with file-like objects { #using-streamingresponse-with-file-like-objects }

If you have a file-like object (e.g. the object returned by `open()`), you can create a generator function to iterate over that file-like object.

public class SortedMultisetTestSuiteBuilder<E> extends MultisetTestSuiteBuilder<E> {
  public static <E> SortedMultisetTestSuiteBuilder<E> using(TestMultisetGenerator<E> generator) {
    SortedMultisetTestSuiteBuilder<E> result = new SortedMultisetTestSuiteBuilder<>();
    result.usingGenerator(generator);
    return result;
  }

  @Override
  public TestSuite createTestSuite() {
    withFeatures(KNOWN_ORDER);

import java.util.EnumMap;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.jspecify.annotations.NullMarked;

/**
 * Generators of different types of map and related collections, such as keys, entries and values.
 *
 * @author Hayward Chan
 */
@GwtCompatible
@NullMarked
public class MapGenerators {

import java.util.EnumMap;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.jspecify.annotations.NullMarked;

/**
 * Generators of different types of map and related collections, such as keys, entries and values.
 *
 * @author Hayward Chan
 */
@GwtCompatible
@NullMarked
public class MapGenerators {

        this(new SecureRandom(), DEFAULT_HASH_ALGORITHM, true);
    }

    /**
     * Constructs a PreauthIntegrityService with specified configuration.
     *
     * @param secureRandom the secure random generator
     * @param hashAlgorithm the hash algorithm to use
     * @param enforceIntegrity whether to enforce integrity checks
     */

        generator = new TestThumbnailGenerator();

        // Default name should be null
        assertNull(generator.getName());

        // Set and get name
        generator.setName("test-generator");
        assertEquals("test-generator", generator.getName());

        // Change name
        generator.setName("new-name");
        assertEquals("new-name", generator.getName());
    }