So, it was a complete additional system.

It is not very popular or used nowadays.

## OpenAPI { #openapi }

OpenAPI (previously known as Swagger) is the open specification for building APIs (now part of the Linux Foundation).

**FastAPI** is based on **OpenAPI**.

That's what makes it possible to have multiple automatic interactive documentation interfaces, code generation, etc.

* It returns an object of type `HTTPBasicCredentials`:
    * It contains the `username` and `password` sent.

{* ../../docs_src/security/tutorial006_an_py39.py hl[4,8,12] *}

When you try to open the URL for the first time (or click the "Execute" button in the docs) the browser will ask you for your username and password:

<img src="/img/tutorial/security/image12.png">

## Check the username { #check-the-username }

    <root-XML localName="map" namespaceURI="http://docs.oasis-open.org/namespace"/>
    <glob pattern="*.ditamap"/>
  </mime-type>
  <mime-type type="application/dita+xml;format=topic">
    <sub-class-of type="application/dita+xml"/>
    <_comment>DITA Topic</_comment>
    <root-XML localName="topic"/>
    <root-XML localName="topic" namespaceURI="http://docs.oasis-open.org/namespace"/>

#FESS_HEAP_SIZE=2g

# Heap new generation
#FESS_HEAP_NEWSIZE=

# max direct memory
#FESS_DIRECT_SIZE=

# Additional Java OPTS
#FESS_JAVA_OPTS=

# Maximum number of open files
MAX_OPEN_FILES=65535

# Maximum amount of locked memory
#MAX_LOCKED_MEMORY=

# Fess log directory
LOG_DIR=${packaging.fess.log.dir}

# Fess data directory
DATA_DIR=${packaging.fess.var.dir}

        }
    }

    /**
     * Report a potential resource leak
     */
    private void reportPotentialLeak(ResourceHolder holder) {
        log.warn("Potential resource leak detected: {} ({}) - open for {} ms", holder.resourceId, holder.resourceType, holder.getAge());

        if (log.isDebugEnabled() && holder.allocationStackTrace != null) {
            StringBuilder sb = new StringBuilder("Allocation stack trace:\n");

        assertFalse(osddHelper.hasOpenSearchFile());

        try {
            osddHelper.asStream();
            fail();
        } catch (final Exception e) {
            assertEquals("Unsupported Open Search Description Document response.", e.getMessage());
        }
    }

    public void test_init_osddpath() throws IOException {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            @Override

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Por baixo dos panos, o código `open("./somefile.txt")` cria um objeto que é chamado de "Gerenciador de Contexto".

{* ../../docs_src/query_params/tutorial005.py hl[6:7] *}

Here the query parameter `needy` is a required query parameter of type `str`.

If you open in your browser a URL like:

```
http://127.0.0.1:8000/items/foo-item
```

...without adding the required parameter `needy`, you will see an error like:

```JSON
{
  "detail": [
    {

                // It is more critical than other attributes because append mode depends on it.
                // We do only really care if we open for writing and not shared for writing
                // otherwise there are no guarantees anyway, but this stuff is legacy anyways.
                final SmbComSeek seekReq = new SmbComSeek(config, 0);