Christian Krakau-Louis
89 lines
3.3 KiB
Python
89 lines
3.3 KiB
Python
import io
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import requests
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from flask import Flask, send_file, request
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from reportlab.pdfgen import canvas
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from reportlab.lib.pagesizes import A4
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from reportlab.lib.units import inch
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from faker import Faker
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from reportlab.lib.utils import ImageReader # Import ImageReader
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import textwrap
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# Set maximum line width in points (A4 page width is 595 pt, margins ~50 pt)
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max_width = 480 # You can tweak this as needed
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app = Flask(__name__)
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# We can seed 'faker' with 'en_US' or 'de_DE' for random text generation
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fake_en = Faker('en_US')
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fake_de = Faker('de_DE')
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@app.route("/")
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def index():
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return ("<h1>Random PDF Generator</h1>"
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"<p>Try the <a href='/generate?lang=en'>/generate</a> endpoint "
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"with a 'lang' query param (en or de) for random text.</p>")
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@app.route("/generate")
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def generate_pdf():
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# Decide which language to use based on the query parameter; default to English
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lang = request.args.get('lang', 'en').lower()
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if lang == 'de':
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text = "\n\n".join([fake_de.text() for _ in range(4)]) # Generate 4 paragraphs
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text_after_image = "\n\n".join([fake_de.text() for _ in range(2)]) # Generate 2 paragraphs
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else:
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text = "\n\n".join([fake_en.text() for _ in range(4)]) # Generate 4 paragraphs
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text_after_image = "\n\n".join([fake_en.text() for _ in range(2)]) # Generate 2 paragraphs
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# Fetch a random image from picsum
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image_url = "https://picsum.photos/600/400"
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response = requests.get(image_url)
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image_data = response.content # raw bytes
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# Create a PDF in memory
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pdf_buffer = io.BytesIO()
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pdf_canvas = canvas.Canvas(pdf_buffer, pagesize=A4)
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# Add text before the image
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pdf_canvas.setFont("Helvetica", 12)
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text_object = pdf_canvas.beginText(50, 780) # Start at the top-left corner
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text_object.setTextOrigin(50, 780)
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text_object.setFont("Helvetica", 12)
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# Wrap and add the paragraphs
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# Wrap and add the paragraphs
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for paragraph in text.split("\n\n"):
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wrapped_lines = textwrap.wrap(paragraph, width=90) # Adjust width to taste
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for line in wrapped_lines:
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text_object.textLine(line)
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text_object.textLine("") # Add a blank line between paragraphs
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pdf_canvas.drawText(text_object)
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# Embed the image
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img_buffer = io.BytesIO(image_data)
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img_reader = ImageReader(img_buffer) # Process the image data
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pdf_canvas.drawImage(img_reader, 50, 400, width=4 * inch, height=3 * inch)
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# Add text after the image
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text_object = pdf_canvas.beginText(50, 380) # Start below the image
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text_object.setFont("Helvetica", 12)
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# Wrap and add the paragraphs
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for paragraph in text_after_image.split("\n\n"):
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wrapped_lines = textwrap.wrap(paragraph, width=90) # Adjust width to taste
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for line in wrapped_lines:
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text_object.textLine(line)
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text_object.textLine("") # Add a blank line between paragraphs
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# Draw the text object on the canvas
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pdf_canvas.drawText(text_object)
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# Finalize the PDF
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pdf_canvas.showPage()
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pdf_canvas.save()
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pdf_buffer.seek(0)
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# Return the PDF to the client
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return send_file(pdf_buffer, as_attachment=True, download_name="random.pdf", mimetype='application/pdf')
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if __name__ == "__main__":
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app.run(host="0.0.0.0", port=5000, debug=True)
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