final String origin = httpRequest.getHeader("Origin");
        if (StringUtil.isNotBlank(origin)) {
            if (logger.isDebugEnabled()) {
                logger.debug("HTTP Request: method={}", httpRequest.getMethod());
            }
            final CorsHandlerFactory factory = ComponentUtil.getCorsHandlerFactory();
            final CorsHandler handler = factory.get(origin);
            if (handler != null) {

  @Nullable V removeSuccessor(N node);

  /**
   * Add {@code node} as a predecessor to the origin node. In the case of an undirected graph, it
   * also becomes a successor. Associates {@code value} with the edge connecting the two nodes.
   */
  void addPredecessor(N node, V value);

  /**
   * Add {@code node} as a successor to the origin node. In the case of an undirected graph, it also

## Джерело (Origin)

Джерело визначається комбінацією протоколу (`http`, `https`), домену (`myapp.com`, `localhost`, `localhost.tiangolo.com`), порту (`80`, `443`, `8080`).


Наприклад, такі адреси вважаються різними джерелами:

          git reset origin/master --hard

          ./gradlew wrapper --gradle-version=nightly
          ./gradlew wrapper

          if ! git diff --quiet; then
            ./gradlew -v
            VERSION=$(./gradlew -v | grep "Gradle" | cut -d' ' -f2)
            git add .
            git commit -m "Update Gradle wrapper to $VERSION"
            git push --force origin devprod/upgrade-to-latest-wrapper

中间件响应两种特定类型的 HTTP 请求……

### CORS 预检请求

这是些带有 `Origin` 和 `Access-Control-Request-Method` 请求头的 `OPTIONS` 请求。

在这种情况下，中间件将拦截传入的请求并进行响应，出于提供信息的目的返回一个使用了适当的 CORS headers 的 `200` 或 `400` 响应。

### 简单请求

任何带有 `Origin` 请求头的请求。在这种情况下，中间件将像平常一样传递请求，但是在响应中包含适当的 CORS headers。

## 更多信息

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

app = FastAPI()

origins = [
    "http://localhost.tiangolo.com",
    "https://localhost.tiangolo.com",
    "http://localhost",
    "http://localhost:8080",
]

app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.get("/")

     *     service is the origin of the stream. When zero, the origin is specified in the `origin`
     *     parameter.
     * @param origin when present, the [origin](http://tools.ietf.org/html/rfc6454) is typically
     *     represented as a combination of scheme, host and port. When empty, the origin is that of
     *     the `streamId`.

contact_links:
  - name: MinIO Community Support
    url: https://slack.min.io
    about: Community support via Slack - for questions and discussions
  - name: MinIO Enterprise Support (SUBNET)
    url: https://min.io/pricing

        println("$commit parents: $parentCommits")
        println(" p1Branches: $p1Branches")
        println(" p2Branches: $p2Branches")
        if (p1Branches.contains("origin/master") && !p2Branches.contains("origin/master") && p2Branches.any { it.startsWith("origin/release") }) {
            List<String> badFiles = filesFromMerge(commit).findAll {gitFile -> MONITORED_PATHS.any { forbiddenPath -> gitFile.startsWith(forbiddenPath)} }

But if you have custom headers that you want a client in a browser to be able to see, you need to add them to your CORS configurations ([CORS (Cross-Origin Resource Sharing)](cors.md){.internal-link target=_blank}) using the parameter `expose_headers` documented in <a href="https://www.starlette.dev/middleware/#corsmiddleware" class="external-link" target="_blank">Starlette's CORS docs</a>.