# CORS (Cross-Origin Resource Sharing) { #cors-cross-origin-resource-sharing }

[CORSまたは「Cross-Origin Resource Sharing」](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) は、ブラウザで実行されているフロントエンドにバックエンドと通信するJavaScriptコードがあり、そのバックエンドがフロントエンドとは異なる「オリジン」にある状況を指します。

## オリジン { #origin }

オリジンはプロトコル (`http`、`https`) とドメイン (`myapp.com`、`localhost`、`localhost.tiangolo.com`) とポート (`80`、`443`、`8080`) の組み合わせです。

したがって、以下はすべて異なるオリジンです:

* `http://localhost`

    public PluginDescriptor(PluginDescriptor original) {
        this.setGroupId(original.getGroupId());
        this.setArtifactId(original.getArtifactId());
        this.setVersion(original.getVersion());
        this.setGoalPrefix(original.getGoalPrefix());
        this.setInheritedByDefault(original.isInheritedByDefault());
        this.setName(original.getName());
        this.setDescription(original.getDescription());

  }

  companion object {
    fun uppercase(original: ResponseBody): ResponseBody =
      object : ResponseBody() {
        override fun contentType() = original.contentType()

        override fun contentLength() = original.contentLength()

        override fun source() = uppercase(original.source()).buffer()
      }

    private fun uppercase(original: Source): Source {

            System.exit(2);
        }

        String targetRef = "refs/remotes/origin/" + targetBranch;

        if (!refExists(targetRef)) {
            System.err.println("Target ref " + targetRef + " not present locally; fetching origin/" + targetBranch + "...");
            run("git", "fetch", "origin", targetBranch);
        }

        String targetSha = stdout("git", "rev-parse", targetRef).trim();

        try {
            String result = SystemUtil.getSearchEngineHttpAddress();
            assertNull(result);
        } finally {
            // Restore original value if it existed
            if (originalValue != null) {
                System.setProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS, originalValue);
            }
        }
    }

    @Test

     *     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`.

        ? ((TransposeTable<R, C, V>) table).original
        : new TransposeTable<C, R, V>(table);
  }

  private static final class TransposeTable<
          C extends @Nullable Object, R extends @Nullable Object, V extends @Nullable Object>
      extends AbstractTable<C, R, V> {
    final Table<R, C, V> original;

    TransposeTable(Table<R, C, V> original) {
      this.original = checkNotNull(original);
    }

    }

    private DefaultModelResolver(DefaultModelResolver original) {
        this.session = original.session;
        this.trace = original.trace;
        this.context = original.context;
        this.resolver = original.resolver;
        this.versionRangeResolver = original.versionRangeResolver;
        this.remoteRepositoryManager = original.remoteRepositoryManager;

   * returns an arbitrary (but consistent) endpoint of the origin edge.
   */
  public final N nodeU() {
    return nodeU;
  }

  /**
   * Returns the node {@link #adjacentNode(Object) adjacent} to {@link #nodeU()} along the origin
   * edge. If this {@link EndpointPair} {@link #isOrdered()}, this is equal to {@link #target()}.
   */
  public final N nodeV() {

/**
 * The concrete route used by a connection to reach an abstract origin server. When creating a
 * connection the client has many options:
 *
 *  * **HTTP proxy:** a proxy server may be explicitly configured for the client. Otherwise, the
 *    [proxy selector][java.net.ProxySelector] is used. It may return multiple proxies to attempt.
 *  * **IP address:** whether connecting directly to an origin server or a proxy, opening a socket