fix(http_request): send form data

[laipz8200]

Checklist:

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• Please open an issue before creating a PR or link to an existing issue
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Description

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Fixes #10362

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

Testing Instructions

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• Test A
• Test B

[bowenliang123]

It's quite shocking for me to see sending the POST requests by manual raw HTTP request body assembly in http_request/executor. Too many details to handle in place, from deciding boundary separator in this case of form data way , to encoding details in form-urlencoded way.

I would try all my best to ensure the requests are executed on higher API for better maintenance and ease of use.

[laipz8200]

The log method is just used to simulate HTTP raw for displaying logs. In reality, the request is completed using httpx.

[bowenliang123]

Yes, well noticed.