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from flask import Flask, request, render_template_string, send_file
import markdown
import imgkit
import os
import traceback
from io import BytesIO
app = Flask(__name__)
# Use a directory within the app's working directory to avoid permission issues
TEMP_DIR = os.path.join(os.getcwd(), "temp")
# Create temporary directory if it doesn't exist
try:
os.makedirs(TEMP_DIR, exist_ok=True)
except Exception as e:
print(f"Error creating temp directory: {e}")
@app.route("/", methods=["GET", "POST"])
def index():
preview_html = None
download_available = False
download_type = "png"
error_message = None
markdown_text = request.form.get("markdown_text", "") if request.method == "POST" else ""
if request.method == "POST" and markdown_text:
try:
# Convert Markdown to HTML
html_content = markdown.markdown(markdown_text, extensions=['fenced_code', 'tables'])
# Prepare HTML with basic styling
full_html = f"""
<!DOCTYPE html>
<html>
<head>
<style>
body {{ font-family: Arial, sans-serif; padding: 20px; }}
pre, code {{ background: #f4f4f4; padding: 10px; border-radius: 5px; }}
table {{ border-collapse: collapse; width: 100%; }}
th, td {{ border: 1px solid #ddd; padding: 8px; text-align: left; }}
th {{ background-color: #f2f2f2; }}
</style>
</head>
<body>
{html_content}
</body>
</html>
"""
# Save HTML to a temporary file
html_path = os.path.join(TEMP_DIR, "output.html")
with open(html_path, "w", encoding="utf-8") as f:
f.write(full_html)
# Generate preview HTML
preview_html = full_html
download_available = True
download_type = request.form.get("download_type", "png")
if "download" in request.form:
if download_type == "html":
return send_file(
html_path,
as_attachment=True,
download_name="output.html",
mimetype="text/html"
)
else: # PNG
# Convert HTML to PNG using imgkit
png_path = os.path.join(TEMP_DIR, "output.png")
imgkit.from_string(full_html, png_path, options={"quiet": ""})
return send_file(
png_path,
as_attachment=True,
download_name="output.png",
mimetype="image/png"
)
except Exception as e:
error_message = f"Error processing request: {str(e)}"
print(f"Error: {traceback.format_exc()}")
return render_template_string("""
<!DOCTYPE html>
<html>
<head>
<title>Markdown to PNG/HTML Converter</title>
<style>
body { font-family: Arial, sans-serif; max-width: 800px; margin: 0 auto; padding: 20px; }
textarea { width: 100%; height: 300px; margin-bottom: 10px; }
select, button { padding: 10px; margin: 5px; }
.preview { border: 1px solid #ddd; padding: 15px; margin-top: 20px; }
.download-btn { background-color: #4CAF50; color: white; border: none; cursor: pointer; }
.download-btn:hover { background-color: #45a049; }
.error { color: red; margin-top: 10px; }
</style>
</head>
<body>
<h1>Markdown to PNG/HTML Converter</h1>
<form method="post">
<textarea name="markdown_text" placeholder="Paste your Markdown here...">{{ markdown_text }}</textarea><br>
<label for="download_type">Output format:</label>
<select name="download_type">
<option value="png" {% if download_type == 'png' %}selected{% endif %}>PNG</option>
<option value="html" {% if download_type == 'html' %}selected{% endif %}>HTML</option>
</select><br>
<button type="submit">Generate Preview</button>
{% if download_available %}
<button type="submit" name="download" value="true" class="download-btn">Download {{ download_type.upper() }}</button>
{% endif %}
</form>
{% if error_message %}
<p class="error">{{ error_message }}</p>
{% endif %}
{% if preview_html %}
<h2>Preview</h2>
<div class="preview">
{{ preview_html | safe }}
</div>
{% endif %}
</body>
</html>
""", preview_html=preview_html, download_available=download_available,
download_type=download_type, error_message=error_message, markdown_text=markdown_text)
if __name__ == "__main__":
app.run(host="0.0.0.0", port=int(os.environ.get("PORT", 7860))) |