![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade { #example-upgrade }

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI

	ch := make(chan itemOrErr[string])

	go func() {
		defer xioutil.SafeClose(ch)

		// Allocate new results channel to receive ObjectInfo.
		objInfoCh := make(chan itemOrErr[ObjectInfo])

		if err := objAPI.Walk(ctx, minioMetaBucket, pathPrefix, objInfoCh, WalkOptions{}); err != nil {
			select {
			case ch <- itemOrErr[string]{Err: err}:

    val connection = connect(peer)
    connection.writePingAndAwaitPong() // Ensure the SETTINGS have been received.
    val stream = connection.newStream(headerEntries("a", "android"), true)
    val sink = stream.sink.buffer()
    sink.writeUtf8("abcdefghi")
    sink.flush()

    // Verify the peer received what was expected.
    peer.takeFrame() // PING
    val headers = peer.takeFrame()

    private int linkSpeed;  // In units of 1 Mbps
    private byte[] sockaddrStorage;  // Socket address
    private InetAddress address;
    private boolean ipv6;
    private boolean rssCapable;  // Receive Side Scaling
    private boolean rdmaCapable;
    
    // Capability flags
    public static final int NETWORK_INTERFACE_CAP_RSS = 0x00000001;
    public static final int NETWORK_INTERFACE_CAP_RDMA = 0x00000002;
    

                    // Add plugin management based on effective model analysis
                    // Note: pluginsNeedingManagement only contains entries for POMs that should receive plugin
                    // management
                    // (i.e., the "last local parent" for each plugin that needs management)
                    Set<String> pluginsForThisPom = pluginsNeedingManagement.get(pomPath);

    receiving stream to process it.

    This change may increase OkHttp's memory use for applications that make many concurrent HTTP
    calls and that can receive data faster than they can process it. Previously, OkHttp limited
    HTTP/2 to 16 MiB of unacknowledged data per connection. With this fix there is a limit of 16 MiB
    of unacknowledged data per stream and no per-connection limit.

    `BufferedSink` and a `ResponseBody` as an Okio `BufferedSource`. Standard
    `InputStream` and `OutputStream` access is also available.

 *  **New Call and Callback types** execute requests and receive their
    responses. Both types of calls can be canceled via the `Call` or the
    `OkHttpClient`.

 *  **URLConnection support has moved to the okhttp-urlconnection module.**

reinstated, you do not qualify to receive new licenses for the same
material under section 10.

  9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or
run a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI

Falcon is another high performance Python framework, it is designed to be minimal, and work as the foundation of other frameworks like Hug.