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HTTP Response Empty

I have set up an API that almost works perfectly. I POST a video to the server and GET a text file from it. Locally it works great, but now that I have this set up on PythonAnywhere, only the POST works. The user side is supposed to have a HTTPResponseMessage with a text file in it that they receive, but there is no response. Do I need to change my code in order to receive a response from PythonAnywhere? I'm sorry if this is a dumb question, I am a newbie and don't know where to look.

Code below is in C#. "MYSITE" is just a placeholder for me to post here

var response = await client.PostAsync("http://MYSITE.pythonanywhere.com", multipartFormContent);
var animation_data = await response.Content.ReadAsStringAsync();

[edit by admin: formatting]

urbanlegendsports | 3 posts | Sept. 22, 2022, 5:37 p.m. | permalink

Check in your code that you are actually returning a response. You can add debug prints to your code to see what is happening. Prints to stderr will appear in your error log.

Staff glenn | 9718 posts | PythonAnywhere staff | Sept. 22, 2022, 6:14 p.m. | permalink

I am getting a response? I guess. In the access log, I get this line... 

1**.*.***.*** - - [22/Sep/2022:18:30:41 +0000] "GET /uploads/AnimationFile.txt HTTP/1.1" 404 207 "-" "-" "1**.*.***.***" response-time=0.005

And then on the user side, it does receive a text file, but instead of receiving the proper data, it receives the following.

<!doctype html>
<html lang=en>
<title>404 Not Found</title>
<h1>Not Found</h1>
<p>The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.</p>

So, I guess I don't know what that means in this regard. How can the URL not be found if I just posted to it a few lines before?

As for your debugging suggestion using print, how can I debug a return line in Python? 

return redirect(url_for('download_file', name="AnimationFile.txt"))

And sorry again if these are dumb questions, I'm fairly new to this.

urbanlegendsports | 3 posts | Sept. 22, 2022, 6:44 p.m. | permalink

Make sure that the path exists and the file is actually there. This could be also a static files mapping issue. Also, check your web app's error log, if you haven't done it yet.

Staff pafk | 3210 posts | PythonAnywhere staff | Sept. 23, 2022, 8:13 a.m. | permalink

I'm getting some "OSError : Write Error"s. The path does exist and now I seem to having troubles connecting to the API, my process starts to time out.

urbanlegendsports | 3 posts | Sept. 23, 2022, 2:45 p.m. | permalink

What happens if you manually do the kind of POST request that you're trying to do from your C# code? You could put together a simple HTML page that you could load locally, and then check out what's going out and what's coming back in the browser's developer tools console.

Staff giles | 12074 posts | PythonAnywhere staff | Sept. 24, 2022, 3:09 p.m. | permalink