题意：用于 OpenAI 图像生成的 Node.js 后端返回错误代码 400。

问题背景：

I am trying to build a backend for the first time using Node.js. This is what I need: Generate image based on prompt -> Get the image and upload it to supabase storage -> Return public URL to uploaded image. I keep getting an error that implies an authentication error (400) from OpenAI but I know the API key is valid and even made a new one just to be sure. The generation was working when I was making requests to the API directly from the front end but that leaves the API key exposed. I'm not sure what is wrong.

我正在第一次使用 Node.js 构建后端。这是我需要做的：根据提示生成图像 -> 获取图像并上传到 Supabase 存储 -> 返回上传图像的公共 URL。我不断收到一个暗示身份验证错误（400）的错误，但我知道 API 密钥是有效的，甚至为了确保还创建了一个新的密钥。当我直接从前端向 API 发送请求时，生成是有效的，但这会暴露 API 密钥。我不确定哪里出错了。

Node.js:

const express = require('express');
const axios = require('axios');
const bodyParser = require('body-parser');
const fs = require('fs');
const FormData = require('form-data');
const { createClient } = require('@supabase/supabase-js');const app = express();
const port = 3000;
const apiKey = '<HIDDEN>';
const supabaseUrl = '<HIDDEN>';
const supabaseKey = '<HIDDEN>';
const supabaseBucket = 'public/posts';const config = {headers: {'Authorization': 'Bearer ' + apiKey,'Content-Type': 'application/json'}
};const supabase = createClient(supabaseUrl, supabaseKey);app.use(bodyParser.json());// Allow any access control origin
app.use(function(req, res, next) {res.header('Access-Control-Allow-Origin', '*');res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');next();
});app.post('/generate-image', async (req, res) => {try {const { text } = req.body;// Build the request to the Dall-e APIconst response = await axios.post('https://api.openai.com/v1/images/generations',{prompt: text,size: "256x256",api_key: apiKey,response_format: "b64_json"},config);console.log("image created...");// Get the generated image as a base64-encoded stringconsole.log("getting image...");const imageBase64 = response.data.data[0].value;// Upload the image to Supabase storageconst { data: uploadData } = await supabase.storage.from(supabaseBucket).upload(Date.now() + '.png', imageBase64, {cacheControl: '3600',upsert: false,contentType: 'image/png',});// Return the public URL for the uploaded fileres.json({imageUrl: `${supabaseUrl}/public/${supabaseBucket}/${uploadData.Key}`,});} catch (error) {res.status(500).json({ message: `Failed to generate image ${error}` });}
});app.listen(port, () => {console.log(`Server listening on port ${port}`);
});

Request from React Native app:

const generateImage = async (text: any) => {try {const response = await fetch("https://endpoint.com/generate-image",{method: "POST",headers: {"Content-Type": "application/json",},body: JSON.stringify({ text }),});const data = await response.json();console.log(data.imageUrl);return data.imageUrl;} catch (error) {console.error(error);return null;}
};

Response:

{"message": "Failed to generate image AxiosError: Request failed with status code 400"
}

问题解决：

You are sending api_key: apiKey in the request body, which the OpenAI API isn't expecting.

你在请求体中发送了 api_key: apiKey，而 OpenAI API 并不期望这个。