api_example.py

import requests
import io
from PIL import Image
import os
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()

# Hugging Face API token (need to set in .env or environment)
HF_TOKEN = os.getenv("HF_TOKEN")

# API base URL
API_BASE = "http://localhost:8000"

def text_to_image(prompt=None, model=None, negative_prompt=None, guidance_scale=None, num_inference_steps=None):
    """
    Generate image from text using the API
    All parameters are optional and will use server defaults if not provided
    """
    url = f"{API_BASE}/text-to-image"
    
    # Prepare form data - only add parameters that are provided 
    # (otherwise use server defaults)
    data = {}
    
    if prompt is not None:
        data["prompt"] = prompt
    
    if model is not None:
        data["model"] = model
    
    if negative_prompt is not None:
        data["negative_prompt"] = negative_prompt
        
    if guidance_scale is not None:
        data["guidance_scale"] = guidance_scale
        
    if num_inference_steps is not None:
        data["num_inference_steps"] = num_inference_steps
    
    # Make API request
    response = requests.post(url, data=data)
    
    if response.status_code == 200:
        # Convert response to PIL image
        image = Image.open(io.BytesIO(response.content))
        return image
    else:
        print(f"Error: {response.status_code}")
        print(response.text)
        return None

def image_to_image(image_path, prompt=None, model=None, negative_prompt=None, 
                  guidance_scale=None, num_inference_steps=None, use_controlnet=False):
    """
    Transform image using the API
    Only image_path is required, other parameters are optional and will use server defaults
    """
    url = f"{API_BASE}/image-to-image"
    
    # Prepare form data - only add parameters that are provided
    data = {}
    
    if prompt is not None:
        data["prompt"] = prompt
    
    if model is not None:
        data["model"] = model
        
    if negative_prompt is not None:
        data["negative_prompt"] = negative_prompt
        
    if guidance_scale is not None:
        data["guidance_scale"] = guidance_scale
        
    if num_inference_steps is not None:
        data["num_inference_steps"] = num_inference_steps
        
    if use_controlnet:
        data["use_controlnet"] = "True"
    
    # Prepare the image file
    files = {
        "image": open(image_path, "rb")
    }
    
    # Make API request
    response = requests.post(url, data=data, files=files)
    
    if response.status_code == 200:
        # Convert response to PIL image
        image = Image.open(io.BytesIO(response.content))
        return image
    else:
        print(f"Error: {response.status_code}")
        print(response.text)
        return None

if __name__ == "__main__":
    # Example usage
    print("Text to Image example:")
    # Can call without arguments to use server defaults
    image = text_to_image()
    if image:
        image.save("text2img_output.png")
        print("Image saved as text2img_output.png")
    
    # Or with specific parameters
    # image = text_to_image("A beautiful mountain landscape at sunset")
    
    print("Image to Image example (requires an input image):")
    # Uncomment and modify path to run:
    # result = image_to_image("input.png")  # Uses default prompt
    # if result:
    #     result.save("img2img_output.png")
    #     print("Image saved as img2img_output.png")
    
    # Example with ControlNet depth-based transformation:
    # result = image_to_image("input.png", prompt="A futuristic cityscape", use_controlnet=True)
    # if result:
    #     result.save("controlnet_output.png")
    #     print("Image saved as controlnet_output.png")