Updates for some providers

[hlohaus]

Fix DuckDuckGo Provider issues
Fix PerplexityLabs, FlowGpt Provider
Update Bing, Gemini Provider

[github-actions]

Hello H Lohaus,

Thank you for your contribution to the project. Here's the review for your pull request titled "Updates for some providers":

General Feedback

Great work on addressing the issues with the DuckDuckGo and PerplexityLabs providers, as well as updating the Bing and Gemini providers. Your changes are well-targeted and seem to follow best practices.

Specific Observations

• The update to the SRCHUSR cookie in Bing.py to include the date and time is a smart move for session management.
• In Chatgpt4Online.py, adding the WebDriver parameter to the get_args_from_browser function could enhance the flexibility of browser simulation.
• The restructuring in DuckDuckGo.py to support a conversation object and return conversation flow is a thoughtful addition for maintaining context.
• The new models added to FlowGpt.py expand the capabilities significantly, and the authentication headers suggest improved security measures.
• The simplification of the session management in PerplexityLabs.py by removing the BaseConnector and using StreamSession directly should streamline the connection process.

Suggestions

• Ensure that all new dependencies and changes are well-documented for maintainability.
• Consider adding unit tests for the new features to ensure they work as expected and to prevent future regressions.

Overall, your pull request is a valuable addition to the project. After a thorough testing phase, it should be ready for merging.

Best regards,
g4f Copilot

[github-actions]

The error message CurlMimi in curl_cffi is missing | pip install -U g4f[curl_cffi] has a typo. It should likely be CurlMime instead of CurlMimi. Additionally, consider providing more context or guidance on resolving the error for better user experience.