* `expose_headers` - 🎦 🙆 📨 🎚 👈 🔜 ⚒ ♿ 🖥. 🔢 `[]`.
* `max_age` - ⚒ 🔆 🕰 🥈 🖥 💾 ⚜ 📨. 🔢 `600`.

🛠️ 📨 2️⃣ 🎯 🆎 🇺🇸🔍 📨...

### ⚜ 🛫 📨

👉 🙆 `OPTIONS` 📨 ⏮️ `Origin` & `Access-Control-Request-Method` 🎚.

👉 💼 🛠️ 🔜 🆘 📨 📨 & 📨 ⏮️ ☑ ⚜ 🎚, & 👯‍♂️ `200` ⚖️ `400` 📨 🎓 🎯.

### 🙅 📨

🙆 📨 ⏮️ `Origin` 🎚. 👉 💼 🛠️ 🔜 🚶‍♀️ 📨 🔘 😐, ✋️ 🔜 🔌 ☑ ⚜ 🎚 🔛 📨.

## 🌅 ℹ

Якщо використовувати лише `BackgroundTasks` (а не `BackgroundTask`), то його можна передавати як параметр у *функції операції шляху*, і **FastAPI** подбає про все інше, так само як і про використання об'єкта `Request`.

Також можна використовувати `BackgroundTask` окремо в FastAPI, але для цього Вам доведеться створити об'єкт у коді та повернути Starlette `Response`, включаючи його.

    }

    /**
     * Gets the client IP address from the request.
     * Checks X-Forwarded-For header before using remote address.
     *
     * @param request the HTTP servlet request
     * @return the client IP address
     */
    public String getClientIp(final HttpServletRequest request) {
        final String value = request.getHeader("x-forwarded-for");
        if (StringUtil.isNotBlank(value)) {

When building web APIs with FastAPI, if there's an error in our code, FastAPI will normally contain it to the single request that triggered the error. 🛡

The client will get a **500 Internal Server Error** for that request, but the application will continue working for the next requests instead of just crashing completely.

### Bigger Errors - Crashes { #bigger-errors-crashes }

                saveInfo(messages -> messages.addSuccessCrudCreateCrudTable(GLOBAL));
            } catch (final Exception e) {
                logger.warn("Failed to process a request.", e);
                throwValidationError(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, buildThrowableMessage(e)),
                        this::asEditHtml);
            }
        }).orElse(() -> {

    }

    /**
     * Gets the total execution time for the search request in milliseconds.
     *
     * @return the execution time in milliseconds
     */
    public long getExecTime() {
        return execTime;
    }

    /**
     * Sets the total execution time for the search request in milliseconds.
     *
     * @param execTime the execution time in milliseconds
     */

   * to stop requests. You could poll for lifecycle changes in a work loop:
   *
   * <pre>
   *   public void run() {
   *     while ({@link #isRunning()}) {
   *       // perform a unit of work
   *     }
   *   }
   * </pre>
   *
   * <p>...or you could respond to stop requests by implementing {@link #triggerShutdown()}, which

        assertSame(loc, res);
        // No connect attempts expected
        verify(c, never()).connectWrapException(any());
    }

    @Test
    @DisplayName("send retries on transport errors and restores request/response state")
    void send_retries_on_transportError() throws Exception {
        // Create a spy to track method calls
        SmbTreeConnection c = spy(newConn());

        // Prepare a minimal locator

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.group;

import org.codelibs.fess.app.web.admin.group.CreateForm;

/**
 * Request body for creating group via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.keymatch;

import org.codelibs.fess.app.web.admin.keymatch.CreateForm;

/**
 * Request body for creating key match via REST API.
 * Extends CreateForm to inherit validation and field definitions.
 */
public class CreateBody extends CreateForm {

    /**
     * Creates a new CreateBody instance.
     */