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解释python requests包的timeout

哈哈哈。。。。垃圾python又来了。

怎么就重名了

459人浏览 · 2024-09-25 19:27:34

怎么就重名了 · 2024-09-25 19:27:34 发布

解释python requests包的timeout

哈哈哈。。。。垃圾python又来了

1 问题

你能看懂下面两个timeout的含义就不用看下面的内容了。

requests.get('http://example.com', timeout=(2, 5))
requests.get('http://127.0.0.1:5000/api',timeout=1)

2 结论

一个参数：requests.get('http://127.0.0.1:5000/api',timeout=1) 是连接或者读超时的时间，也就是timeout=(1, 1)
两个参数：requests.get('http://example.com', timeout=(2, 5))，连接超时的时间2s，读超时时间5s。

2.1 `ConnectTimeout`-连接`https://hub.docker.com/`超时的案例

>>> requests.get('https://hub.docker.com/',timeout=1)
Traceback (most recent call last):
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connection.py", line 198, in _new_conn
    sock = connection.create_connection(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/util/connection.py", line 85, in create_connection
    raise err
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/util/connection.py", line 73, in create_connection
    sock.connect(sa)
TimeoutError: timed out

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 793, in urlopen
    response = self._make_request(
               ^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 491, in _make_request
    raise new_e
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 467, in _make_request
    self._validate_conn(conn)
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 1099, in _validate_conn
    conn.connect()
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connection.py", line 616, in connect
    self.sock = sock = self._new_conn()
                       ^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connection.py", line 207, in _new_conn
    raise ConnectTimeoutError(
urllib3.exceptions.ConnectTimeoutError: (<urllib3.connection.HTTPSConnection object at 0x1065f8bc0>, 'Connection to hub.docker.com timed out. (connect timeout=1)')

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/adapters.py", line 486, in send
    resp = conn.urlopen(
           ^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 847, in urlopen
    retries = retries.increment(
              ^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/util/retry.py", line 515, in increment
    raise MaxRetryError(_pool, url, reason) from reason  # type: ignore[arg-type]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='hub.docker.com', port=443): Max retries exceeded with url: / (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0x1065f8bc0>, 'Connection to hub.docker.com timed out. (connect timeout=1)'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/api.py", line 73, in get
    return request("get", url, params=params, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/api.py", line 59, in request
    return session.request(method=method, url=url, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/adapters.py", line 507, in send
    raise ConnectTimeout(e, request=request)
requests.exceptions.ConnectTimeout: HTTPSConnectionPool(host='hub.docker.com', port=443): Max retries exceeded with url: / (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0x1065f8bc0>, 'Connection to hub.docker.com timed out. (connect timeout=1)'))
>>>

2.2 `ReadTimeout`-读超时的案例

(base)  ~/ cat python ss.py 
cat: python: No such file or directory
from flask import Flask, request, jsonify
import time
app = Flask(__name__)

@app.route('/api', methods=['POST','GET'])
def api():
    time.sleep(2)
    # 在这里处理数据，例如：
    result = {'message': 'Hello, World!'}
    return jsonify(result)

if __name__ == '__main__':
    app.run(debug=True)

(base)  ~/ cat ss.py
from flask import Flask, request, jsonify
import time
app = Flask(__name__)

@app.route('/api', methods=['POST','GET'])
def api():
    time.sleep(2)
    # 在这里处理数据，例如：
    result = {'message': 'Hello, World!'}
    return jsonify(result)

if __name__ == '__main__':
    app.run(debug=True)

(base)  ~/ 
(base)  ~/ 
(base)  ~/ 
(base)  ~/ python ss.py
 * Serving Flask app 'ss'
 * Debug mode: on
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
 * Running on http://127.0.0.1:5000
Press CTRL+C to quit
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 118-547-680
127.0.0.1 - - [25/Sep/2024 19:03:55] "GET /api HTTP/1.1" 200 -
127.0.0.1 - - [25/Sep/2024 19:04:05] "GET /api HTTP/1.1" 200 -

>>> requests.get('http://127.0.0.1:5000/api',timeout=1)
Traceback (most recent call last):
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 537, in _make_request
    response = conn.getresponse()
               ^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connection.py", line 466, in getresponse
    httplib_response = super().getresponse()
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/http/client.py", line 1428, in getresponse
    response.begin()
  File "/Users/admin/miniforge3/lib/python3.12/http/client.py", line 331, in begin
    version, status, reason = self._read_status()
                              ^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/http/client.py", line 292, in _read_status
    line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/socket.py", line 707, in readinto
    return self._sock.recv_into(b)
           ^^^^^^^^^^^^^^^^^^^^^^^
TimeoutError: timed out

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/adapters.py", line 486, in send
    resp = conn.urlopen(
           ^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 847, in urlopen
    retries = retries.increment(
              ^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/util/retry.py", line 470, in increment
    raise reraise(type(error), error, _stacktrace)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/util/util.py", line 39, in reraise
    raise value
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 793, in urlopen
    response = self._make_request(
               ^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 539, in _make_request
    self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 370, in _raise_timeout
    raise ReadTimeoutError(
urllib3.exceptions.ReadTimeoutError: HTTPConnectionPool(host='127.0.0.1', port=5000): Read timed out. (read timeout=1)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/api.py", line 73, in get
    return request("get", url, params=params, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/api.py", line 59, in request
    return session.request(method=method, url=url, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/adapters.py", line 532, in send
    raise ReadTimeout(e, request=request)
requests.exceptions.ReadTimeout: HTTPConnectionPool(host='127.0.0.1', port=5000): Read timed out. (read timeout=1)

>>>

2.3 读超时

>>> requests.get('http://127.0.0.1:5000/api',timeout=(1, 1))
Traceback (most recent call last):
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 537, in _make_request
    response = conn.getresponse()
               ^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connection.py", line 466, in getresponse
    httplib_response = super().getresponse()
                       ^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/http/client.py", line 1428, in getresponse
    response.begin()
  File "/Users/admin/miniforge3/lib/python3.12/http/client.py", line 331, in begin
    version, status, reason = self._read_status()
                              ^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/http/client.py", line 292, in _read_status
    line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/socket.py", line 707, in readinto
    return self._sock.recv_into(b)
           ^^^^^^^^^^^^^^^^^^^^^^^
TimeoutError: timed out

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/adapters.py", line 486, in send
    resp = conn.urlopen(
           ^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 847, in urlopen
    retries = retries.increment(
              ^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/util/retry.py", line 470, in increment
    raise reraise(type(error), error, _stacktrace)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/util/util.py", line 39, in reraise
    raise value
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 793, in urlopen
    response = self._make_request(
               ^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 539, in _make_request
    self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/urllib3/connectionpool.py", line 370, in _raise_timeout
    raise ReadTimeoutError(
urllib3.exceptions.ReadTimeoutError: HTTPConnectionPool(host='127.0.0.1', port=5000): Read timed out. (read timeout=1)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/api.py", line 73, in get
    return request("get", url, params=params, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/api.py", line 59, in request
    return session.request(method=method, url=url, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/admin/miniforge3/lib/python3.12/site-packages/requests/adapters.py", line 532, in send
    raise ReadTimeout(e, request=request)
requests.exceptions.ReadTimeout: HTTPConnectionPool(host='127.0.0.1', port=5000): Read timed out. (read timeout=1)
>>> 
>>> 
>>> 
>>>

2.4 不超时

>>> 
>>> requests.get('http://127.0.0.1:5000/api',timeout=(1, 2.1))
<Response [200]>
>>> 
>>> requests.get('http://127.0.0.1:5000/api',timeout=2.1)
<Response [200]>
>>> 
>>> print(requests.get('http://127.0.0.1:5000/api',timeout=2.1).json())
{'message': 'Hello, World!'}
>>>

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怎么就重名了

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