# Custom Response Classes - File, HTML, Redirect, Streaming, etc.

There are several custom response classes you can use to create an instance and return them directly from your *path operations*.

Read more about it in the [FastAPI docs for Custom Response - HTML, Stream, File, others](https://fastapi.tiangolo.com/advanced/custom-response/).

You can import them directly from `fastapi.responses`:

```python
from fastapi.responses import (
    FileResponse,

                        final String reading = readingList.get(readingCount);
                        if (i + 1 == queries.length && prefixQuery) {
                            readingQueryBuilder.should(QueryBuilders.prefixQuery(fieldName, reading));
                        } else {
                            readingQueryBuilder.should(QueryBuilders.termQuery(fieldName, reading));
                        }
                    }

		{
			authT: authTypeSigned,
			pass:  true,
		},
		// Test 4 - supported s3 type with post policy.
		{
			authT: authTypePostPolicy,
			pass:  true,
		},
		// Test 5 - supported s3 type with streaming signed.
		{
			authT: authTypeStreamingSigned,
			pass:  true,
		},
		// Test 6 - supported s3 type with signature v2.
		{
			authT: authTypeSignedV2,
			pass:  true,
		},

{
    "properties": {
      "suggestWord": {
        "type": "keyword"
      },
      "reading": {
        "type": "keyword"
      },
      "permissions": {
        "type": "keyword"
      },
      "boost": {
        "type": "float"
      },
      "createdBy": {
        "type": "keyword"
      },
      "createdTime": {
        "type": "long"
      },
      "updatedBy": {
        "type": "keyword"
      },

### Creating the `Settings` only once with `lru_cache`

Reading a file from disk is normally a costly (slow) operation, so you probably want to do it only once and then reuse the same settings object, instead of reading it for each request.

But every time we do:

```Python
Settings()
```

# Reference

Here's the reference or code API, the classes, functions, parameters, attributes, and
all the FastAPI parts you can use in your applications.

If you want to **learn FastAPI** you are much better off reading the

        return "ElevateWord [labelTypeIds=" + Arrays.toString(labelTypeIds) + ", labelTypeList=" + labelTypeList + ", boost=" + boost
                + ", createdBy=" + createdBy + ", createdTime=" + createdTime + ", reading=" + reading + ", suggestWord=" + suggestWord
                + ", updatedBy=" + updatedBy + ", updatedTime=" + updatedTime + ", docMeta=" + docMeta + "]";
    }

			Key: target.NATSStreaming,
			Value: func() string {
				if cfg.Streaming.Enable {
					return config.EnableOn
				}
				return config.EnableOff
			}(),
		},
		config.KV{
			Key:   target.NATSStreamingClusterID,
			Value: cfg.Streaming.ClusterID,
		},
		config.KV{
			Key:   target.NATSStreamingAsync,
			Value: config.FormatBool(cfg.Streaming.Async),
		},
		config.KV{

If you want to ask how to do something, or to understand why something isn't working the way you expect it to, use Stack Overflow. https://stackoverflow.com/questions/tagged/okhttp

			// parameter for a streaming signature which is set
			// to a custom value for example: "aws-chunked,gzip".
			metadata[strings.ToLower(xhttp.ContentEncoding)] = contentEncoding
		} else {
			// Trimmed content encoding is empty when the header
			// value is set to "aws-chunked" only.

			// Make sure to delete the content-encoding parameter
			// for a streaming signature which is set to value