)
    val responseB = client.newCall(requestB).execute()
    assertThat(responseB.body.string()).isEqualTo("b")
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(0)
  }

  /** Confirm suppressed exceptions that occur while connecting are returned. */
  @Test fun connectExceptionsAreReturnedAsSuppressed() {
    val proxySelector = RecordingProxySelector()

一般情况下你可能不会在代码中直接使用它。

但在某些高级场景中需要时，你可以添加自定义响应头：

{* ../../docs_src/handling_errors/tutorial002_py310.py hl[14] *}

## 安装自定义异常处理器 { #install-custom-exception-handlers }

可以使用[与 Starlette 相同的异常处理工具](https://www.starlette.dev/exceptions/)添加自定义异常处理器。

假设有一个自定义异常 `UnicornException`（你自己或你使用的库可能会 `raise` 它）。

并且你希望用 FastAPI 在全局处理该异常。

此时，可以用 `@app.exception_handler()` 添加自定义异常处理器：

   * features to support (from the enclosing {@link AbstractIteratorTester} instance). Instead of
   * throwing exceptions like {@link NoSuchElementException} at the appropriate times, it throws
   * {@link PermittedMetaException} instances, which wrap a set of all exceptions that the iterator
   * could throw during the invocation of that method. This is necessary because, e.g., a call to

import pytest
from fastapi import Depends, FastAPI, HTTPException
from fastapi.exceptions import RequestValidationError
from fastapi.testclient import TestClient
from starlette.responses import JSONResponse


def http_exception_handler(request, exception):
    return JSONResponse({"exception": "http-exception"})


def request_validation_exception_handler(request, exception):
    return JSONResponse({"exception": "request-validation"})

import sys
import warnings

import pytest

from tests.utils import skip_module_if_py_gte_314

if sys.version_info >= (3, 14):
    skip_module_if_py_gte_314()

from fastapi import FastAPI
from fastapi.exceptions import PydanticV1NotSupportedError

with warnings.catch_warnings():
    warnings.simplefilter("ignore", UserWarning)
    from pydantic.v1 import BaseModel


def test_raises_pydantic_v1_model_in_endpoint_param() -> None:

import warnings

import pytest
from fastapi import FastAPI
from fastapi.exceptions import FastAPIDeprecationWarning
from fastapi.responses import ORJSONResponse, UJSONResponse
from fastapi.testclient import TestClient
from pydantic import BaseModel


class Item(BaseModel):
    name: str
    price: float


# ORJSON


def _make_orjson_app() -> FastAPI:
    with warnings.catch_warnings():

package jcifs.smb;

/**
 * The <code>SmbAuthException</code> encapsulates the variety of
 * authentication related error codes returned by an SMB server.
 * <p>
 * See <a href="../../../authhandler.html">jCIFS Exceptions and NtlmAuthenticator</a> for more information about
 * <code>SmbAuthException</code>.
 */

public class SmbAuthException extends SmbException {

    /**
     *
     */

   * features to support (from the enclosing {@link AbstractIteratorTester} instance). Instead of
   * throwing exceptions like {@link NoSuchElementException} at the appropriate times, it throws
   * {@link PermittedMetaException} instances, which wrap a set of all exceptions that the iterator
   * could throw during the invocation of that method. This is necessary because, e.g., a call to

            assertTrue(projectDirsWithUnitTests.contains(it), "Contains unit tests: $it")
        }
    }

    private fun containsSrcFileWithString(
        srcRoot: File,
        content: String,
        exceptions: List<String>,
    ): Boolean {
        srcRoot.walkTopDown().forEach { file ->
            if (file.extension == "groovy" || file.extension == "java") {
                val originalText = file.readText()

 * or response.
 *
 * Implementations of this interface throw [IOException] to signal connectivity failures. This
 * includes both natural exceptions such as unreachable servers, as well as synthetic exceptions
 * when responses are of an unexpected type or cannot be decoded.
 *
 * Other exception types cancel the current call:
 *