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.

  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

        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);

    /**
     * Sets the list of generator names.
     * @param generatorList The list of generator names.
     */
    public void setGeneratorList(final List<String> generatorList) {
        this.generatorList = generatorList;
    }

    @Override
    public String getName() {
        return name;
    }

    /**
     * Sets the name of this thumbnail generator.
     * @param name The generator name.

import org.codelibs.fess.util.DocumentUtil;

/**
 * HTML tag-based thumbnail generator that creates thumbnails from image content
 * referenced in HTML documents. This generator extracts images from HTML content
 * and processes them to create thumbnail images based on configured dimensions
 * and format settings.
 *
 * <p>The generator validates image MIME types, processes image data through

        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.

                  CollectionFeature.RESTRICTS_ELEMENTS,
                  ListFeature.SUPPORTS_SET)
              .createTestSuite());
    }
    return suite;
  }

  // Test generators.  To let the GWT test suite generator access them, they need to be
  // public named classes with a public default constructor.

  public static final class DoublesAsListGenerator extends TestDoubleListGenerator {
    @Override

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);

                  CollectionFeature.RESTRICTS_ELEMENTS,
                  ListFeature.SUPPORTS_SET)
              .createTestSuite());
    }
    return suite;
  }

  // Test generators.  To let the GWT test suite generator access them, they need to be
  // public named classes with a public default constructor.

  public static final class ShortsAsListGenerator extends TestShortListGenerator {
    @Override