Download some JPG files and make it a single PDF & share it

[rompdeck]

I download some jpg files (A4 size) from a website and convert all the files into a single pdf file and email it.

The jpg files are in a url format of:

http://URL.com/RPT/2020/07/26/<page no>

The date today is 2020/7/26 and page number as 2 char (01-15)

How can I automate the whole process so it does it automatically without any thing from me?

My technical background is I learnt MS office packages in school and completed FreeCodeCamp's Responsive Web Design Certification and I am currently doing Automate the Boring Stuff with Python.

I just have a laptop, no server or any cloud accounts. So, I am hoping that I can run it program/script (not sure of the difference) on some free service.

Is Google App Script capable of doing what I want?

Pls mention the steps I need to follow or better if you can like me to a tutorial of anyone doing a project similar to mine.

[dev7060]

Use the site's API if there is any. Or use web scraping to extract the images. Keep in mind web scraping could affect the performance of the server and may not be allowed according to the terms of the website. For pdf conversion and mailing, I'm pretty sure there are many packages already available to perform such tasks. It's just how you connect the dots and make use of em to get the final result that you want.

[SioSio]

For the sake of clarity, I coded in processing units.

In my environment, because of security reasons, I could not test only the part that downloads the jpg file, so I have not confirmed the operation.
Other than that, the operation has been confirmed.

I do not write the code of the send email part,
Use smtplib to send email, and use MIMEMultipart to attach files to emails.

import datetime
import time
import os
import urllib.error
import urllib.request
from PIL import Image
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.backends.backend_pdf import PdfPages
from PyPDF2 import PdfFileMerger
 
#function download jpg files
def download_jpg(url, dl_dir):
    try:
        with urllib.request.urlopen(url) as web_file, open(dl_dir, 'wb') as local_file:
            local_file.write(web_file.read())
            return None
    except urllib.error.URLError as e:
        print(e)
        return None
 
# Set Url_list
dt_now = datetime.datetime.now()
yyyy = dt_now.strftime('%Y')
mm = dt_now.strftime('%m')
dd = dt_now.strftime('%d')
url_base = 'http://URL.com/RPT/' + yyyy + '/' + mm + '/' + dd + '/'
url_list = [url_base + '{:02}.jpg'.format(i) for i in range(1, 16)]
img_list = ['img{:02},jpg'.format(i) ]for i in range(1, 16)
pdf_list = ['img{:02},pdf'.format(i) for i in range(1, 16)]
 
# Download jpg files
sleep_time = 1
dl_dir = '.' # Specify a download folder.
for url in url_list:
    download_jpg(url, dl_dir)
    time.sleep(sleep_time)
 
#convert jpg file to pdf
for img in img_list:
    image = Image.open(img)
    image = np.asarray(image)
    fig = plt.figure()
    plt.axis('off')
    plt.imshow(image)
    pp = PdfPages(img.replace('jpg','pdf'))
    pp.savefig(fig)
    pp.close()
 
# Combine pdf files
pdfmarger = PdfFileMerger()
for pdf in pdf_list:
    pdfmarger.append(pdf)
pdfmarger.write('img-' + yyyy + '-' + mm + '-' + dd + '.pdf')
pdfmarger.close()
 

[SioSio]

You can find an example of sending email with python from the following URL.

https://bytes.com/searchresults.php?...ment&gsc.sort=

[rompdeck]

wow @SioSio, thanks for the outline. I was stuck at converting to pdf.

Another thing I want to know is if I can run it on a server. As my laptop is not on always and I dont have any server. Also I have no clue how to use a server/ what is actually a server.

I am hoping to keep it running in a server so it started up and does its thing at a specific time.

Also, the sleep time is vital for not causing issue with the server? I dont understand the need to sleep.

[rompdeck]

@dev7060 I am stuck at connecting the dots as I have no clue how to set it up on a server so it can run on its own without any issue. I have to the point it downloads the jpg files to my laptop.

[dev7060]

I suggest reading a how to guide on using python with a hosted server. Testing can always be done in the local environment.

[SioSio]

Another way to convert multiple images into one PDF using "img2pdf".
If the above way stuck at converting to pdf, try replacing "#convert jpg file to pdf" with this.

import os
import img2pdf
 
pdfFileName = "output.pdf"
path = "."
ext = ".jpg"
 
with open(pdfFileName, "wb") as files:
  files.write(img2pdf.convert([i for i in os.listdir(path)if i.endswith(ext)]))