import fastapi
from PIL import Image, ImageDraw, ImageFont
from io import BytesIO

from fastapi.responses import PlainTextResponse
app = fastapi.FastAPI()

img = Image.open("./smoking-caterpillar.jpg")
font = ImageFont.truetype("./unicode.impact.ttf", 72)

class JPEGResponse(fastapi.Response):
    media_type="image/jpeg"

@app.get("/", response_class=PlainTextResponse)
async def root():
    return "go to /img for the funny thingy"

@app.get("/img", response_class=JPEGResponse)
async def getImage(request: fastapi.Request):
    img2 = img.copy()
    draw = ImageDraw.Draw(img2)
    draw.text((img2.width/2,img2.height/2), request.client.host, (255,255,255), font=font, stroke_width=5, stroke_fill=(0,0,0), anchor="mm")
    img_bin = BytesIO()
    img2.save(img_bin, format="jpeg")
    return fastapi.Response(content=img_bin.getvalue(), media_type="image/jpeg")