Python 请求 - 无连接适配器

Question

I'm using the Requests: HTTP for Humans library and I got this weird error and I don't know what is mean.

No connection adapters were found for '192.168.1.61:8080/api/call'

Anybody has an idea?

Answer 1

You need to include the protocol scheme:

'http://192.168.1.61:8080/api/call'

Without the http:// part, requests has no idea how to connect to the remote server.

Note that the protocol scheme must be all lowercase; if your URL starts with HTTP:// for example, it won't find the http:// connection adapter either.

Answer 2

One more reason, maybe your url include some hiden characters, such as '\\n'.

If you define your url like below, this exception will raise:

url = '''
http://google.com
'''

because there are '\\n' hide in the string. The url in fact become:

\nhttp://google.com\n

Answer 3

In my case, I received this error when I refactored a url, leaving an erroneous comma thus converting my url from a string into a tuple.

My exact error message:

    741         # Nothing matches :-/
--> 742         raise InvalidSchema("No connection adapters were found for {!r}".format(url))
    743 
    744     def close(self):

InvalidSchema: No connection adapters were found for "('https://api.foo.com/data',)"

Here's how that error came to be born:

# Original code:
response = requests.get("api.%s.com/data" % "foo", headers=headers)

# --------------
# Modified code (with bug!)
api_name = "foo"
url = f"api.{api_name}.com/data",  # !!! Extra comma doesn't belong here!
response = requests.get(url, headers=headers)


# --------------
# Solution: Remove erroneous comma!
api_name = "foo"
url = f"api.{api_name}.com/data"  # No extra comma!
response = requests.get(url, headers=headers)

Answer 4

Fix connection adapter matching to be most-specific first,Miscellaneous small Python 3 text encoding bugs.,.netrc no longer overrides explicit auth.,Mountable Connection Adapters

To install Requests, simply:

$ pip install requests

Answer 5

As stated in a comment by christian-long

Your url may accidentally be a tuple because of a trailing comma

url = self.base_url % endpoint,

Make sure it is a string