如何在Python 2.7.x中生成PDF/HTML文件的下载URL

Got it, let's break this down step by step for Python 2.7.x. Here's how you can generate PDF/HTML files, store them in a specified directory, create a downloadable URL, and send that URL out:

1. Prerequisites #

First, if you're generating PDFs, install the reportlab library (it's one of the most reliable options for Python 2.7):

pip install reportlab

For HTML files, no extra libraries are needed—we can write directly to a file.

2. Generate & Save HTML File #

Let's start with a simple HTML file. We'll save it to a directory that's accessible by your web server (so users can download it):

import os

# Define your target directory (adjust this to your web server's static files path)
DOWNLOAD_DIR = "/var/www/html/downloads"

# Create directory if it doesn't exist
if not os.path.exists(DOWNLOAD_DIR):
    os.makedirs(DOWNLOAD_DIR)

# Generate HTML content
html_content = """
<!DOCTYPE html>
<html>
<head><title>Sample Download</title></head>
<body><h1>Hello, this is your downloadable HTML file!</h1></body>
</html>
"""

# Define filename and full path
html_filename = "sample_download.html"
html_file_path = os.path.join(DOWNLOAD_DIR, html_filename)

# Write content to file
with open(html_file_path, "w") as f:
    f.write(html_content.encode("utf-8"))  # Handle encoding for Python 2.7

print "HTML file saved to: {}".format(html_file_path)

3. Generate & Save PDF File #

Using reportlab to create a basic PDF:

from reportlab.pdfgen import canvas
import os

DOWNLOAD_DIR = "/var/www/html/downloads"
if not os.path.exists(DOWNLOAD_DIR):
    os.makedirs(DOWNLOAD_DIR)

# Define PDF details
pdf_filename = "sample_download.pdf"
pdf_file_path = os.path.join(DOWNLOAD_DIR, pdf_filename)

# Create PDF
pdf_canvas = canvas.Canvas(pdf_file_path)
pdf_canvas.drawString(100, 750, "Hello, this is your downloadable PDF!")
pdf_canvas.drawString(100, 730, "Generated with Python 2.7 & ReportLab")
pdf_canvas.save()

print "PDF file saved to: {}".format(pdf_file_path)

4. Create a Downloadable URL #

Assuming your web server is configured to serve files from /var/www/html/downloads at http://your-domain.com/downloads/, we can build the URL dynamically:

# Your server's base URL (adjust this to your actual domain)
BASE_URL = "http://your-domain.com/downloads"

# For HTML file
html_download_url = "{}/{}".format(BASE_URL, html_filename)
print "HTML Download URL: {}".format(html_download_url)

# For PDF file
pdf_download_url = "{}/{}".format(BASE_URL, pdf_filename)
print "PDF Download URL: {}".format(pdf_download_url)

Note: Make sure your web server has read permissions for the DOWNLOAD_DIR and is set up to serve static files from that location.

5. Send the Download URL #

Let's use Python's built-in smtplib to send the URL via email. Adjust the SMTP settings to match your email provider (e.g., Gmail, Outlook, or your company's mail server):

import smtplib
from email.mime.text import MIMEText

def send_download_url(recipient_email, download_url, file_type):
    # Email configuration
    sender_email = "your-email@example.com"
    sender_password = "your-email-password"  # For Gmail, use an app password if 2FA is enabled
    smtp_server = "smtp.example.com"
    smtp_port = 587  # Typical TLS port

    # Email content
    subject = "Your {} Download Link".format(file_type.upper())
    body = "Hi there!\n\nYou can download your {} file here: {}\n\nBest regards,\nYour Script".format(file_type, download_url)

    # Create MIME message
    msg = MIMEText(body.encode("utf-8"), "plain", "utf-8")
    msg["Subject"] = subject
    msg["From"] = sender_email
    msg["To"] = recipient_email

    # Send email
    try:
        server = smtplib.SMTP(smtp_server, smtp_port)
        server.starttls()
        server.login(sender_email, sender_password)
        server.sendmail(sender_email, recipient_email, msg.as_string())
        server.quit()
        print "Download URL sent to {}".format(recipient_email)
    except Exception as e:
        print "Failed to send email: {}".format(str(e))

# Example usage
send_download_url("user@example.com", pdf_download_url, "pdf")

Key Notes for Python 2.7 #

• Always handle string encoding explicitly (use .encode("utf-8") to avoid Unicode errors)
• print is a statement, not a function (so no parentheses unless you're printing a single object)
• Make sure all file paths are absolute to avoid confusion with working directories

内容的提问来源于stack exchange，提问作者Apurva Kunkulol