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Endpoint

POST /api/generateImage

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Description

This function generates an image using OpenAI’s DALL-E 3 model based on a text prompt, then downloads and uploads the generated image to Azure Blob Storage for persistent storage.

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Request body

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prompt
string
required
The text description of the image to generate. This prompt is passed directly to DALL-E 3 to create the image.

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Response

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body
string
Returns “Image uploaded successfully” when the image has been generated and stored.

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Behavior

  1. Receives a text prompt from the request body
  2. Calls OpenAI’s DALL-E 3 API to generate a 1024x1024 image
  3. Downloads the generated image as an array buffer
  4. Generates a SAS token for Azure Blob Storage authentication
  5. Uploads the image to the “images” container with a filename format: {prompt}_{timestamp}.png
  6. Returns a success message

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Example request

const response = await fetch('/api/generateImage', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    prompt: 'A serene mountain landscape at sunset'
  })
});

const result = await response.text();
console.log(result); // "Image uploaded successfully"

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Implementation details

The function uses the following configuration for DALL-E 3: 
const response = await openai.createImage({
  model: "dall-e-3",
  prompt: prompt,
  n: 1,
  size: '1024x1024',
})
Images are stored in Azure Blob Storage with a timestamp-based naming convention to ensure uniqueness and enable chronological sorting.

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