The first packet returned by streaming from the OpenAPI chat interface is inconsistent with the openai standard.

[zhiluan233]

例行检查

• 我已确认目前没有类似 issue
• 我已完整查看过项目 README，以及项目文档
• 我使用了自己的 key，并确认我的 key 是可正常使用的
• 我理解并愿意跟进此 issue，协助测试和提供反馈
• 我理解并认可上述内容，并理解项目维护者精力有限，不遵循规则的 issue 可能会被无视或直接关闭

你的版本

• 公有云版本
• 私有部署版本

问题描述

我使用FastGPT的OpenAPI聊天接口时，发现返回流的首包json结果delta内不包含role: "assistant"，这直接导致飞书智能伙伴自定义模型的上下文无法使用。

复现步骤

正常用stream=true请求Chat/Completions接口

预期结果

流式传输的首包应当与OpenAI标准的接口一样，包含role: "assistant"

相关截图
问题请求：

OpenAI的流式返回结果首包存在role: "assistant"

希望修复~

[c121914yu]

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Routine inspection

• I have confirmed that there is no similar issue currently
• I have fully reviewed the project README, as well as project documentation
• I used my own key and confirmed that my key can be used normally
• I understand and am willing to follow up on this issue, assist in testing and provide feedback
• I understand and acknowledge the above content, and understand that project maintainers have limited energy. Issues that do not follow the rules may be ignored or closed directly

your version

• Public cloud version
• Private deployment version

Problem Description

When I used the OpenAPI chat interface of FastGPT, I found that the delta of the first json result of the return stream did not contain role: "assistant", which directly caused the context of Feishu Smart Partner's custom model to be unusable.

Steps to reproduce

Normally use stream=true to request the Chat/Completions interface

expected outcome

The first packet of streaming should be the same as the OpenAI standard interface, including role: "assistant"

Related screenshots
Question request:

The first packet of OpenAI's streaming return result contains role: "assistant"

Hope to fix~

[c121914yu]

#676 fix it