Can't post FormData since Axios 0.25.0
Problem
Describe the issue I can't post FormData since `"axios": "^0.25.0",` `Error: Request failed with status code 400` Example Code [code block] Expected behavior, if applicable That it works Environment - Axios Version: 0.25.0 - Node.js Version: v14.17.6 - OS: iOS 15, Android 11 (But on all platforms and versions) - Additional Library Versions: React Native 0.64.3 Additional context/Screenshots No problem with `"axios": "^0.24.0",` I saw this PR https://github.com/axios/axios/pull/3757 on 0.25.0, but I don't know what I have to change in code. Thanks for your help 👍
Error Output
Error: Request failed with status code 400`
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1 Fix
Update FormData Handling in Axios 0.25.0
In Axios version 0.25.0, changes were made to how FormData is handled, particularly regarding the Content-Type header. If the Content-Type is set manually, Axios may not correctly serialize the FormData, leading to a 400 error when the server cannot parse the request.
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- 1
Remove Manual Content-Type Header
Ensure that you are not manually setting the Content-Type header when sending FormData. Axios will automatically set the correct Content-Type when FormData is detected.
javascriptconst response = await axios.post(url, formData); - 2
Check FormData Initialization
Verify that the FormData object is being initialized correctly and that all necessary fields are appended properly before sending.
javascriptconst formData = new FormData(); formData.append('key', value); - 3
Inspect Server-Side Handling
Ensure that the server is correctly set up to handle the incoming FormData. Check for any changes in the API that may affect how data is parsed.
- 4
Upgrade Axios Version
If issues persist, consider upgrading to a later version of Axios where bugs may have been fixed. Check the changelog for any relevant updates.
bashnpm install axios@latest
Validation
To confirm the fix, test the FormData submission again and ensure that the server responds with a success status (200) instead of a 400 error. You can also log the request and response to verify that the data is being sent correctly.
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Environment
Submitted by
Alex Chen
2450 rep