在我的 Python get 请求中是否有 Eclipse Pydev 设置或其他设置阻止我与主机连接？

Question

我正在尝试使用 Python 3.5.3 从 PyDev Eclipse 3.8.1 环境中的 ESA 服务器读取数据。此处给出了产品 link 的示例：

"https://scihub.copernicus.eu/dhus/odata/v1/Products('c7208694-dedb-4f47-96c0-c8fb03512ff5')

您将需要身份验证凭据才能访问该网站。

在我的 Eclipse 环境中，我通过转到 Windows-> 常规 -> 网络连接手动添加了代理设置。代理不需要身份验证。

为了获取网页的内容，我使用 Python 获取请求来发送我的查询，如下所示：

url = r"https://scihub.copernicus.eu/dhus/odata/v1/Products('c5dc59f0-b041-4f76-a685-49be63491270')"

r = requests.get(url, verify=False, proxies=proxies, auth=auth)

我需要 verify=False 来禁用证书检查，proxies 是一个字典，用于存储代理地址和相关端口。服务器凭据由 auth 给出，它是用户名和密码的元组。

当我向服务器发送请求时，出现以下错误：

Traceback (most recent call last):
  File "/lib/python3.5/site-packages/urllib3/connection.py", line 159, in _new_conn
    (self._dns_host, self.port), self.timeout, **extra_kw)
  File "/lib/python3.5/site-packages/urllib3/util/connection.py", line 80, in create_connection
    raise err
  File "/lib/python3.5/site-packages/urllib3/util/connection.py", line 70, in create_connection
    sock.connect(sa)
TimeoutError: [Errno 110] Connection timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/lib/python3.5/site-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/lib/python3.5/site-packages/urllib3/connectionpool.py", line 343, in _make_request
    self._validate_conn(conn)
  File "/lib/python3.5/site-packages/urllib3/connectionpool.py", line 839, in _validate_conn
    conn.connect()
  File "/lib/python3.5/site-packages/urllib3/connection.py", line 301, in connect
    conn = self._new_conn()
  File "/lib/python3.5/site-packages/urllib3/connection.py", line 168, in _new_conn
    self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x7fecf00acbe0>: Failed to establish a new connection: [Errno 110] Connection timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/lib/python3.5/site-packages/requests/adapters.py", line 449, in send
    timeout=timeout
  File "/lib/python3.5/site-packages/urllib3/connectionpool.py", line 638, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/lib/python3.5/site-packages/urllib3/util/retry.py", line 398, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='scihub.copernicus.eu', port=443): Max retries exceeded with url: /dhus/odata/v1/Products('c5dc59f0-b041-4f76-a685-49be63491270') (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7fecf00acbe0>: Failed to establish a new connection: [Errno 110] Connection timed out',))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "download_lib2/download_lib/scihub/download.py", line 325, in <module>
    download_url(dl_link, auth, temp_dir)
  File "download_lib2/download_lib/scihub/download.py", line 153, in download_url
    online = check_url_online(url_to_download, auth)
  File "download_lib2/download_lib/scihub/download.py", line 51, in check_url_online
    r = requests.get(url, verify=False, proxies=proxies, auth=auth)
  File "/lib/python3.5/site-packages/requests/api.py", line 75, in get
    return request('get', url, params=params, **kwargs)
  File "/lib/python3.5/site-packages/requests/api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "/lib/python3.5/site-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/lib/python3.5/site-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/lib/python3.5/site-packages/requests/adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='scihub.copernicus.eu', port=443): Max retries exceeded with url: /dhus/odata/v1/Products('c5dc59f0-b041-4f76-a685-49be63491270') (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7fecf00acbe0>: Failed to establish a new connection: [Errno 110] Connection timed out',))

我在 Eclipse 之外的 IDLE 中尝试了相同的请求，我能够成功连接并读取内容。我当前的 Eclipse/PyDev 环境是否有问题，不允许我发送获取请求？

为什么 Python 无法连接？我可以使用 Eclipse 中的其他项目（例如 https://podaac-opendap.jpl.nasa.gov/opendap/allData/oscar/preview/L4/oscar_third_deg/）毫无问题地向这个网站和其他网站发送获取请求。

编辑：在版本中添加

Answer 1

socks 超时表示您的问题实际上是与您的代理的连接，而不是 ESA 服务器。此外，我相信 Eclipse 中的代理设置仅用于 plugins/software 更新，而不是您编写的任何代码。

作为第一步，请检查您的 proxy dictionary 密钥是否正确，并在可能的情况下验证您的代理 URL。

您提到您还有其他可以访问互联网的 Eclipse 项目；值得检查他们实施的代理设置，看看是否与您当前的设置有任何差异。

在我的 Python get 请求中是否有 Eclipse Pydev 设置或其他设置阻止我与主机连接？

Is there an Eclipse Pydev setting or something in my Python get request preventing me from connecting with a host?

eclipse

pydev

python-3.x

python-requests