Using Python requests to GET not working - web client and browser works

Question

I have my web app API running.

If I go to http://127.0.0.1:5000/ via any browser I get the right response.

If I use the Advanced REST Client Chrome app and send a GET request to my app at that address I get the right response.

However this gives me a 503:

import requests
response = requests.get('http://127.0.0.1:5000/')

I read to try this for some reason:

s = requests.Session()
response = s.get('http://127.0.0.1:5000/')

But I still get a 503 response.

Other things I've tried: Not prefixing with http://, not using a port in the URL, running on a different port, trying a different API call like Post, etc.

Thanks.

Like this? requests.get('127.0.0.1:5000, headers = { 'User-Agent' : 'something' }) What would I set it to? — Village
– Village, Commented Dec 3, 2015 at 21:16
Hard to know for sure, but everyone likes to pretend to be Mozilla: headers = {'User-Agent': 'Mozilla/5.0'} — davejagoda
– davejagoda, Commented Dec 3, 2015 at 21:27
Try the Sesame Street school of debugging - one of these things is not like the other. There appears to be some difference between the working request and the non-working one, have to find it. 2 possible approaches come to mind: look at the server side (maybe logs?) and see what was received by the server or look at the client side (maybe Chrome developer tools) and see what was sent. — davejagoda
– davejagoda, Commented Dec 3, 2015 at 21:47

dphamcc · Accepted Answer · 2015-12-03 21:12:47Z

1

Is http://127.0.0.1:5000/ your localhost? If so, try 'http://localhost:5000' instead

answered Dec 3, 2015 at 21:12

dphamcc

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9 Comments

Village Over a year ago

It is my localhost. I tried what you said and I'm getting a 404 now.

Village Over a year ago

Yes. It returns 200 (ok/success)

dphamcc Over a year ago

Ok, what does your response say about the 503 error if you get the text? print(str(response.text))

Village Over a year ago

Pretty generic 503 error, I can't post pictures yet but here is the wall of text:

Village Over a year ago

A communication error occurred: "Connection refused" The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time. For assistance, contact your network support team.

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Village · Accepted Answer · 2015-12-09 19:21:35Z

0

Just in case someone is struggling with this as well, what finally worked was running the application on my local network ip.

I.e., I just opened up the web app and changed the app.run(debug=True) line to app.run(host="my.ip.address", debug = True).

I'm guessing the requests library perhaps was trying to protect me from a localhost attack? Or our corporate proxy or firewall was preventing communication from unknown apps to the 127 address. I had set NO_PROXY to include the 127.0.0.1 address, so I don't think that was the problem. In the end I'm not really sure why it is working now, but I'm glad that it is.

answered Dec 9, 2015 at 19:21

Village

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