Convert a byte type data from .tiff file into PDF-CodePudding

TODO: Convert a TIFF file from URL into PDF

I have a .tiff based file that I need to download/get from a url. When trying to save/download that file into cwd, it is downloaded, however, I am unable to open it.

1. Command used to download the file into cwd:

import urllib.request
sample_tiff_url = "https://www.gati.com/viewPOD2.jsp?dktno=322012982"
urllib.request.urlretrieve(sample_tiff_url, "check.tiff")

My reasoning for downloading it was that I'll download it in local and then convert it into pdf using

print(type(resp.content))
>>>bytes

3. Another thing I tried is;

import img2pdf
import base64
img_content = base64.b64decode(resp.content)
content = img2pdf.convert(img_content)

which gives following error:

ImageOpenError: cannot read input image (not jpeg2000). PIL: error reading image: cannot identify image file <_io.BytesIO object at 0x7ff46368c410>

Along with this;

from PIL import Image
import io
pil_bytes = io.BytesIO(resp.content)
pil_image = Image.open(pil_bytes)

Error:

UnidentifiedImageError: cannot identify image file <_io.BytesIO object at 0x7ff4642e2650>

4. Lastly;

import requests
from PyPDF2 import PdfFileMerger, PdfFileReader
sample_tiff_url = ""https://www.gati.com/viewPOD2.jsp?dktno=322012982""
resp = requests.get(sample_tiff_url,stream=True)
PdfFileReader(resp.content)

which gives:

TBH, I have not worked with image libraries and files so I am not understanding all the errors that I get.

TLDR; Either download the .tiff file into local or how to read the contents from that URL giving bytes type data and convert/write it into a PDF.

CodePudding user response：

import requests
import io
from PIL import Image

url = 'https://www.gati.com/viewPOD2.jsp?dktno=322012982'
r = requests.get(url)

pil_bytes = io.BytesIO(r.content)
pil_image = Image.open(pil_bytes)

# Needed to get around ValueError: cannot save mode RGBA
rgb = Image.new('RGB', pil_image.size)
rgb.paste(pil_image)
rgb.save('downloaded_image.pdf', 'PDF')