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3.0.4: Improved request-response example #3997

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ralfhandl merged 1 commit into from
Aug 7, 2024
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3.0.4: Improved request-response example #3997

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10 changes: 7 additions & 3 deletions versions/3.0.4.md
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Original file line number Diff line number Diff line change
Expand Up @@ -2036,17 +2036,21 @@ For example, given the following HTTP request:
POST /subscribe/myevent?queryUrl=https://clientdomain.com/stillrunning HTTP/1.1
Host: example.org
Content-Type: application/json
Content-Length: 187
Content-Length: 188

@handrews handrews Aug 5, 2024

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I'm confused by both numbers- to me it looks like it's 260 if there is a trailing newline (more if the line ends are CRLF):

Python 3.8.13 (default, May 11 2022, 14:42:53) 
[Clang 13.1.6 (clang-1316.0.21.2.3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> x = """{
...   "failedUrl" : "https://clientdomain.com/failed",
...   "successUrls" : [
...   "failedUrl": "https://clientdomain.com/failed",
...   "successUrls": [
...     "https://clientdomain.com/fast",
...     "https://clientdomain.com/medium",
...     "https://clientdomain.com/slow"
...   ]
... }
... """
>>> x
'{\n  "failedUrl" : "https://clientdomain.com/failed",\n  "successUrls" : [\n  "failedUrl": "https://clientdomain.com/failed",\n  "successUrls": [\n    "https://clientdomain.com/fast",\n    "https://clientdomain.com/medium",\n    "https://clientdomain.com/slow"\n  ]\n}\n'
>>> len(x)
260
>>>

@ralfhandl ralfhandl Aug 6, 2024

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Funny, I did something similar with Node.js and get 188:

Welcome to Node.js v22.5.1.
Type ".help" for more information.
> var text = `{
...   "failedUrl": "https://clientdomain.com/failed",
...   "successUrls": [
...     "https://clientdomain.com/fast",
...     "https://clientdomain.com/medium",
...     "https://clientdomain.com/slow"
...   ]
... }`
undefined
> text
'{\n' +
  '  "failedUrl": "https://clientdomain.com/failed",\n' +
  '  "successUrls": [\n' +
  '    "https://clientdomain.com/fast",\n' +
  '    "https://clientdomain.com/medium",\n' +
  '    "https://clientdomain.com/slow"\n' +
  '  ]\n' +
  '}'
> text.length
188

Which is identical to what my editor shows when I select that text block in the markdown source.

@ralfhandl ralfhandl Aug 6, 2024

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Out of curiosity I repeated the experiment with Python:

Python 3.9.6 (default, Feb  3 2024, 15:58:27) 
[Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> text="""{
...   "failedUrl": "https://clientdomain.com/failed",
...   "successUrls": [
...     "https://clientdomain.com/fast",
...     "https://clientdomain.com/medium",
...     "https://clientdomain.com/slow"
...   ]
... }"""
>>> text
'{\n  "failedUrl": "https://clientdomain.com/failed",\n  "successUrls": [\n    "https://clientdomain.com/fast",\n    "https://clientdomain.com/medium",\n    "https://clientdomain.com/slow"\n  ]\n}'
>>> len(text)
188

Which produces the same length of 188 as Node.js.

@ralfhandl ralfhandl Aug 6, 2024

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Now I see it: your experiment contains duplicated lines:
image

@mikekistler mikekistler Aug 6, 2024

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I reproduced Ralf's experiment with the same result, so 188 does seem to be the right length. But I think the result of len(text) in Python is in units of unicode characters, which may not be the length of a UTF-8-encoded response body (though in this case it is). The way to get the length of a string encoded to UTF-8 in Python is

>>> len(text.encode('utf-8'))
188

@handrews handrews Aug 6, 2024

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188 it is! I swear I stared at that and could not figure out what was going on.... sorry to take up your time, folks!


{
"failedUrl" : "https://clientdomain.com/failed",
"successUrls" : [
"failedUrl": "https://clientdomain.com/failed",
"successUrls": [
"https://clientdomain.com/fast",
"https://clientdomain.com/medium",
"https://clientdomain.com/slow"
]
}
```

resulting in:

```http
201 Created
Location: https://example.org/subscription/1
```
Expand Down