Azure Bot无法展示Function App返回的响应问题求助

我正在搭建一个集成自定义MS Teams应用的Azure Bot，目的是让员工通过Teams和ChatGPT交互。目前已完成以下配置：

• 成功配置OpenAI API密钥
• 创建Azure Bot（名称：InternalChatGPTBot）
• 创建PowerShell Core Function App（名称：TeamsBotHandler）
• 确认Function App可正常调用，输入输出符合要求
• 创建关联该Bot的自定义MS Teams应用

问题现象 #

尽管执行了大量排查步骤，Azure Bot始终没有任何响应：日志显示Teams应用或Web Chat测试能成功触发TeamsBotHandler，但聊天框里完全看不到回复。另外因为租户配置限制，无法使用Bot Framework Emulator进行调试。

已验证的排查项 #

• Function App运行状态正常，可正常访问
• 返回的JSON Schema符合要求
• Function App授权级别设置为匿名
• 响应的Content-Type为application/json
• OpenAI API调用成功，能返回有效内容
• 已正确使用Push-OutputBinding返回结果
• Azure Bot存在，消息端点配置正确
• 应用在Entra中配置了正确的API权限
• MS Teams应用状态健康，可将聊天输入发送至Function App

Function App核心逻辑代码 #

using namespace System.Net

# Input bindings are passed in via param block.
param($Request, $TriggerMetadata)

# Format Body
$body = $Request.Body

$userMessage = $body.text

$openaiApiKey = "XXXX" #obviously private

$payload = @{
    model = "gpt-4o"
    messages = @(
        @{ role = "user"; content = $userMessage }
    )
} | ConvertTo-Json -Depth 10

# Call API
$response = Invoke-WebRequest -Uri "https://api.openai.com/v1/chat/completions" -Method POST -Headers @{ "Authorization" = "Bearer $openaiApiKey" } -Body $payload -ContentType "application/json"

# Process Response
$content = $response.content | ConvertFrom-Json -ErrorAction SilentlyContinue
$botReply = $content.choices[0].message.content

# Clean up Response
$botReply = $botReply -replace '[\u201C\u201D]', '"'
$botReply = $botReply -replace '[\u2018\u2019]', "'"
$botReply = $botReply -replace '\r?\n', "`n"

# Build Teams-compatible response
$teamsResponse = @{
    type = "message"
    text = $botReply
} | ConvertTo-Json -Depth 10

# Push response out
Push-OutputBinding -Name Response -Value ([HttpResponseContext]@{
    StatusCode = 200
    Headers = @{ "Content-Type" = "application/json" }
    Body = $teamsResponse
})
return

内容的提问来源于stack exchange，提问作者emiliablueshift