Cover download error

wrzx · 09-18-2015, 09:23 AM

Hi,
im trying to create metadata search plugin and when it comes to downloading cover image it finished with this error

Code:

Traceback (most recent call last):
  File "site-packages\calibre\ebooks\metadata\sources\covers.py", line 63, in process_result
  File "site-packages\calibre\utils\magick\__init__.py", line 135, in load
Exception: no decode delegate for this image format `' @ error/blob.c/BlobToImage/358

here is example link to image which is running good from every browser but generating error from above in calibre
direct url
xtrance.info/new/?mainpage=file&subpage=publication_image&id=7730

Can anybody tell me how to make it works?

Thanks

theducks · 09-18-2015, 09:43 AM

that link is a 404 for me

wrzx · 09-18-2015, 09:52 AM

Strange...from embedded link it dont works.

this is direct url

xtrance.info/new/?mainpage=file&subpage=publication_image&id=7730

BetterRed · 09-18-2015, 07:08 PM

works for me in vanilla chrome and overweight firefox. Maybe xtrance was off air for bit.

try putting an "http://" in front of the address.

wrzx · 09-21-2015, 09:59 AM

in plugin i tried with and without http:// on begining of link but i got error on every version

kovidgoyal · 09-21-2015, 10:13 AM

That error indicates what you are getting is not an image, most likely it is some html page. Download it programmatically and see.

calibre-debug -c "from calibre import browser; br = browser(); print(br.open(url).read())"

wrzx · 09-22-2015, 03:45 AM

Thanks for replay Kovid.
I tried what you suggest but it looks that response is normal image in JPG format. See attached screenshot.

kovidgoyal · 09-22-2015, 05:38 AM

Then its likely the server has implemented some form of scraping protection. You will need ot run calibre from source and save the response by modify the code in the file pointed to in the error message. Instructions for setting upa calibre development environment are in the user manual

09-18-2015, 09:23 AM	#1
wrzx Junior Member Posts: 4 Karma: 10 Join Date: Sep 2015 Device: none	Cover download error Hi, im trying to create metadata search plugin and when it comes to downloading cover image it finished with this error Code: Traceback (most recent call last): File "site-packages\calibre\ebooks\metadata\sources\covers.py", line 63, in process_result File "site-packages\calibre\utils\magick\__init__.py", line 135, in load Exception: no decode delegate for this image format `' @ error/blob.c/BlobToImage/358 here is example link to image which is running good from every browser but generating error from above in calibre direct url xtrance.info/new/?mainpage=file&subpage=publication_image&id=7730 Can anybody tell me how to make it works? Thanks Last edited by wrzx; 09-18-2015 at 09:53 AM.

09-18-2015, 07:08 PM	#4
BetterRed null operator (he/him) Posts: 22,036 Karma: 30277960 Join Date: Mar 2012 Location: Sydney Australia Device: none	works for me in vanilla chrome and overweight firefox. Maybe xtrance was off air for bit. try putting an "http://" in front of the address. Last edited by BetterRed; 09-18-2015 at 07:14 PM.

09-22-2015, 03:45 AM	#7
wrzx Junior Member Posts: 4 Karma: 10 Join Date: Sep 2015 Device: none	Thanks for replay Kovid. I tried what you suggest but it looks that response is normal image in JPG format. See attached screenshot. Attached Thumbnails

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09-18-2015, 09:43 AM	#2
theducks Well trained by Cats Posts: 31,282 Karma: 62000000 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	that link is a 404 for me

09-18-2015, 09:52 AM	#3
wrzx Junior Member Posts: 4 Karma: 10 Join Date: Sep 2015 Device: none	Strange...from embedded link it dont works. this is direct url xtrance.info/new/?mainpage=file&subpage=publication_image&id=7730

09-21-2015, 09:59 AM	#5
wrzx Junior Member Posts: 4 Karma: 10 Join Date: Sep 2015 Device: none	in plugin i tried with and without http:// on begining of link but i got error on every version

09-21-2015, 10:13 AM	#6
kovidgoyal creator of calibre Posts: 45,631 Karma: 28549046 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That error indicates what you are getting is not an image, most likely it is some html page. Download it programmatically and see. calibre-debug -c "from calibre import browser; br = browser(); print(br.open(url).read())"

09-22-2015, 05:38 AM	#8
kovidgoyal creator of calibre Posts: 45,631 Karma: 28549046 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Then its likely the server has implemented some form of scraping protection. You will need ot run calibre from source and save the response by modify the code in the file pointed to in the error message. Instructions for setting upa calibre development environment are in the user manual

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