return response.body().string();
  }
}
```


Post to a Server
----------------

This program posts data to a service. [Full source][post_example].

```java
public static final MediaType JSON = MediaType.get("application/json");

OkHttpClient client = new OkHttpClient();

String post(String url, String json) throws IOException {
  RequestBody body = RequestBody.create(json, JSON);

      <post>******@****.***</post>
      <archive>http://mail-archives.apache.org/mod_mbox/maven-users</archive>
    </mailingList>
    <mailingList>
      <name>Maven Developer List</name>
      <subscribe>******@****.***</subscribe>
      <unsubscribe>******@****.***</unsubscribe>
      <post>******@****.***</post>

        add(buildCryptoSx(client)) // 521 - server down
      }
      add(buildChantra(client))
    }
  }

  private fun getByIp(host: String): InetAddress {
    return try {
      InetAddress.getByName(host)
    } catch (e: UnknownHostException) {
      // unlikely
      throw RuntimeException(e)
    }
  }

## Webhooks mit **FastAPI** und OpenAPI dokumentieren

Mit **FastAPI** können Sie mithilfe von OpenAPI die Namen dieser Webhooks, die Arten von HTTP-Operationen, die Ihre Anwendung senden kann (z. B. `POST`, `PUT`, usw.) und die Request**bodys** definieren, die Ihre Anwendung senden würde.

## Documenting webhooks with **FastAPI** and OpenAPI

With **FastAPI**, using OpenAPI, you can define the names of these webhooks, the types of HTTP operations that your app can send (e.g. `POST`, `PUT`, etc.) and the request **bodies** that your app would send.

Following is an example lambda handler.
```py
from flask import Flask, request, abort, make_response
import requests

app = Flask(__name__)
@app.route('/', methods=['POST'])
def get_webhook():
	if request.method == 'POST':
		# obtain the request event from the 'POST' call
		event = request.json

		object_context = event["getObjectContext"]

		# Get the presigned URL to fetch the requested
		# original object from MinIO

  <mailingLists>
    <mailingList>
      <name>Apache Announce List</name>
      <subscribe>******@****.***</subscribe>
      <unsubscribe>******@****.***</unsubscribe>
      <post>******@****.***</post>
      <archive>http://mail-archives.apache.org/mod_mbox/www-announce/</archive>
    </mailingList>
  </mailingLists>

```python
from fastapi import APIRouter
```

::: fastapi.APIRouter
    options:
        members:
            - websocket
            - include_router
            - get
            - put
            - post
            - delete
            - options
            - head
            - patch
            - trace

```python
from fastapi import APIRouter
```

::: fastapi.APIRouter
    options:
        members:
            - websocket
            - include_router
            - get
            - put
            - post
            - delete
            - options
            - head
            - patch
            - trace

The user of your API (an external developer) will create an invoice in your API with a POST request.

Then your API will (let's imagine):

* Send the invoice to some customer of the external developer.
* Collect the money.
* Send a notification back to the API user (the external developer).
    * This will be done by sending a POST request (from *your API*) to some *external API* provided by that external developer (this is the "callback").