Content-Length invalid for unicode text

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
38/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
typescript
Domain
api

Research direction

Start by tracing the code that generates the HTTP request string and calculates Content-Length, then check how Unicode text is encoded. Add a regression test using äöü and verify that the generated length matches the UTF-8 byte count.

Written by the indexing model from the issue text.

Description

When generating a http request string, the content-length seems to be calculated using the number of codepoints instead of bytes.
This was generated using insomnia, which uses httpsnippet:

POST /api/v1/test HTTP/1.1
Content-Type: text/plain
User-Agent: insomnia/2023.5.8
Host: localhost:5003
Content-Length: 3

äöü

This is what insomnia actually sends when executing the request (visualized using nc -l localhost 5003)

$ nc -l localhost 5003
POST /api/v1/test HTTP/1.1
Host: localhost:5003
Content-Type: text/plain
User-Agent: insomnia/2023.5.8
Accept: */*
Content-Length: 6

äöü
Dominant language
TypeScript
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