feat: (#225) Add support for application/json in POST requests

[khoaHyh]

Addresses #225

🗒️ Summary

• Modified _from_body function to handle JSON data
  • Implement conditional processing for JSON and form data
• Added test case for JSON POST request

Demo

I used the Python virtual env and installed my custom branch as a package to sanity check the changes E2E. I was able to get the same error using the curl call and the same code mentioned in the GH Issue. After the changes, the curl call worked 🤠

🔥 Before (expand to see screenshot)

🪄 After (expand to see screenshot)

TDD

Initially, the test I added failed because the JSON parsing wasn't implemented yet. The screenshot below is a snippet of the error from the test before the changes were added.

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[78], line 21
     18     assert "Bar: 15" in response
     20 # Run the test
---> 21 test_json_post()

Cell In[78], line 13, in test_json_post()
     12 def test_json_post():
---> 13     response = test_r(cli, '/', '{"foo": "Lorem", "bar": 15}', 'post',
     14                       headers={"Content-Type": "application/json"})
     16     assert "It worked!" in response
     17     assert "Foo: Lorem" in response

Cell In[70], line 3, in test_r(cli, path, exp, meth, hx, **kwargs)
      1 def test_r(cli, path, exp, meth='get', hx=False, **kwargs):
      2     if hx: kwargs['headers'] = {'hx-request':"1"}
----> 3     test_eq(getattr(cli, meth)(path, **kwargs).text, exp)

### inbetween stack trace stuff here ###

Cell In[34], line 8, in _from_body(req, p)
      6 d = _annotations(anno)
      7 cargs = {k:_form_arg(k, v, d) for k,v in form2dict(form).items() if not d or k in d}
----> 8 return anno(**cargs)

TypeError: Item.__init__() missing 2 required positional arguments: 'foo' and 'bar'

[gitnotebooks]

Found 1 changed notebook. Review the changes at https://gitnotebooks.com/AnswerDotAI/fasthtml/pull/234

[jph00]

Great stuff!