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异步请求中常见的aiohttp.client_exceptions模块错误

发布时间:2024-01-02 07:57:47

在异步请求中,使用aiohttp库进行网络请求时,可能会遇到一些客户端相关的错误。这些错误可以在aiohttp.client_exceptions模块中找到。下面是一些常见的错误及其使用示例:

1. ClientConnectionError: 当连接服务器时发生错误时抛出。例如,当目标主机无法连接时,可能会抛出此错误。

import aiohttp
from aiohttp import ClientConnectionError

async def make_request(url):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                return await response.text()
    except ClientConnectionError as e:
        print(f"Error connecting to server: {e}")

2. ClientError: 当发生请求错误时抛出。例如,当服务器返回4xx或5xx状态码时,可能会抛出此错误。

import aiohttp
from aiohttp import ClientError

async def make_request(url):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                if response.status >= 400:
                    raise ClientError(f"Server returned {response.status} status code")
                return await response.text()
    except ClientError as e:
        print(f"Request error: {e}")

3. ServerDisconnectedError: 当连接的服务器关闭时,可能会抛出此错误。

import aiohttp
from aiohttp import ServerDisconnectedError

async def make_request(url):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                return await response.text()
    except ServerDisconnectedError as e:
        print(f"Server disconnected: {e}")

4. ClientPayloadError: 当读取请求或响应的正文时发生错误时抛出。这可能是由于无效的内容编码或非法的内容长度引起的。

import aiohttp
from aiohttp import ClientPayloadError

async def make_request(url):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                return await response.text()
    except ClientPayloadError as e:
        print(f"Payload error: {e}")

5. ContentTypeError: 当无法解析内容类型时抛出。例如,当服务器返回未知的内容类型时,就会抛出此错误。

import aiohttp
from aiohttp import ContentTypeError

async def make_request(url):
    try:
        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                return await response.text()
    except ContentTypeError as e:
        print(f"Content type error: {e}")

以上是一些常见的aiohttp.client_exceptions模块中的错误及其使用示例。通过捕获这些错误,我们可以更好地处理异步请求期间可能出现的异常情况。