我在连接GPT3 OpenAI，但始终无法成功发送POST请求（我参考了一些指南，但对他们来说是有效的…）。

private IEnumerator Upload ( ){    WWWForm form = new WWWForm();    form.AddField ( "prompt", prompt );    form.AddField ( "max_tokens", maxTokens );    form.AddField ( "model", model );    form.AddField ( "temperature", temperature );    using ( UnityWebRequest wR = UnityWebRequest.Post ( "https://api.openai.com/v1/completions", form ) )    {        wR.SetRequestHeader ( "Authorization", "Bearer " + apiKey );        wR.SetRequestHeader ( "Content-Type", "json" );        yield return wR.SendWebRequest ( );        if ( wR.result != UnityWebRequest.Result.Success )        {            Debug.Log ( "ERROR:\n" + wR.error );        }        else        {            Debug.Log ( "Success:\n" + wR.result + "\nUpload Completed!);        }    }}

我的代码总是返回错误请求（即400 Bad Request）。

回答：

从头部信息中删除”Content-Type”。内容不是JSON，而是表单数据。

例如：

using ( UnityWebRequest wR = UnityWebRequest.Post ( "https://api.openai.com/v1/completions", form ) ){    wR.SetRequestHeader ( "Authorization", "Bearer " + apiKey );    //wR.SetRequestHeader ( "Content-Type", "json" );    yield return wR.SendWebRequest ( );    if ( wR.result != UnityWebRequest.Result.Success )    {        Debug.Log ( "ERROR:\n" + wR.error );    }    else    {        Debug.Log ( "Success:\n" + wR.result + "\nUpload Completed!);    }}