# CORS (Cross-Origin Resource Sharing)

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">CORS ou "Cross-Origin Resource Sharing"</a> refere-se às situações em que um frontend rodando em um navegador possui um código JavaScript que se comunica com um backend, e o backend está em uma "origem" diferente do frontend.

## Origem

import java.util.Set;
import java.util.TreeMap;

/**
 * Standard implementation of {@link Network} that supports the options supplied by {@link
 * NetworkBuilder}.
 *
 * <p>This class maintains a map of nodes to {@link NetworkConnections}. This class also maintains a
 * map of edges to reference nodes. The reference node is defined to be the edge's source node on
 * directed graphs, and an arbitrary endpoint of the edge on undirected graphs.
 *

import javax.annotation.CheckForNull;

/**
 * This class provides a skeletal implementation of {@link BaseGraph}.
 *
 * <p>The methods implemented in this class should not be overridden unless the subclass admits a
 * more efficient implementation.
 *
 * @author James Sexton
 * @param <N> Node parameter type
 */
@ElementTypesAreNonnullByDefault
abstract class AbstractBaseGraph<N> implements BaseGraph<N> {

  /**

import java.util.Set;
import java.util.TreeMap;

/**
 * Standard implementation of {@link Network} that supports the options supplied by {@link
 * NetworkBuilder}.
 *
 * <p>This class maintains a map of nodes to {@link NetworkConnections}. This class also maintains a
 * map of edges to reference nodes. The reference node is defined to be the edge's source node on
 * directed graphs, and an arbitrary endpoint of the edge on undirected graphs.
 *

/**
 * @author shinsuke
 *
 */
public class FileSystemClientTest extends PlainTestCase {
    public FileSystemClient fsClient;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        StandardCrawlerContainer container = new StandardCrawlerContainer().singleton("mimeTypeHelper", MimeTypeHelperImpl.class)//
                .singleton("fsClient", FileSystemClient.class);

from enum import Enum

from fastapi import FastAPI

app = FastAPI()


class Tags(Enum):
    items = "items"
    users = "users"


@app.get("/items/", tags=[Tags.items])
async def get_items():
    return ["Portal gun", "Plumbus"]


@app.get("/users/", tags=[Tags.users])
async def read_users():

```Python hl_lines="6"
{!../../docs_src/python_types/tutorial010.py!}
```

그리고 역시나 모든 에디터 도움을 받게 되겠죠.

<img src="/img/python-types/image06.png">

## Pydantic 모델

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a>은 데이터 검증(Validation)을 위한 파이썬 라이브러리입니다.

당신은 속성들을 포함한 클래스 형태로 "모양(shape)"을 선언할 수 있습니다.

그리고 각 속성은 타입을 가지고 있습니다.

  @AndroidIncompatible // Reflection bug, or actual binary compatibility problem?
  public void testElementSetBridgeMethods() {
    for (Method m : TreeMultiset.class.getMethods()) {
      if (m.getName().equals("elementSet") && m.getReturnType().equals(SortedSet.class)) {
        return;
      }
    }
    fail("No bridge method found");
  }

 * complete details.
 * 
 * @deprecated NTLMv1 only
 */
@Deprecated
public class NtlmHttpFilter implements Filter {

    private static final Logger log = LoggerFactory.getLogger(NtlmHttpFilter.class);

    private String defaultDomain;
    private String domainController;
    private boolean loadBalance;
    private boolean enableBasic;

すべての箇所で、すべての開発者に最高の開発体験を提供しました。

## 要件

いくつかの代替手法を試したあと、私は<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">**Pydantic**</a>の強みを利用することを決めました。

そして、JSON Schemaに完全に準拠するようにしたり、制約宣言を定義するさまざまな方法をサポートしたり、いくつかのエディターでのテストに基づいてエディターのサポート (型チェック、自動補完) を改善するために貢献しました。

開発中、もう1つの重要な鍵となる<a href="https://www.starlette.io/" class="external-link" target="_blank">**Starlette**</a>、にも貢献しました。

## 開発