No size for some images

[drey101]

I've noticed that for some urls, the library isn't able to retrieve the length.

Here is a sample url wherein length was not retrieved: https://www.red7.me/asset/user_files/c/227258.jpg

It happened more often in the previous version, and I thought it was fixed in v4.0.0, but it still occurs.

[drey101]

Here is the retrieved result:

{
  width: 595,
  height: 183,
  type: 'jpg',
  mime: 'image/jpeg',
  wUnits: 'px',
  hUnits: 'px',
  url: 'https://www.red7.me/asset/user_files/c/227258.jpg'
}

[puzrin]

IMHO that's a server side issue. You could check error details and retry. Or try to increase timeout. If file is received, parcer looks ok.

Can i close this?

[drey101]

Thanks for the advice, I'll try to increase timeout as there doesn't seem to be any errors, and the file is accessible. The image is not held by my server so I won't be able to check if there are errors on their end.

[drey101]

Increasing timeout didn't do anything. On checking the headers of the image url (https://www.red7.me/asset/user_files/c/227258.jpg) by logging it in probe-image-size/http, it seems it doesn't return 'content-length' because it's 'transfer-encoding' is 'chunked'.

[puzrin]

Content-length is not mandatory. Can you provide a reproducible sample? Existing talk does not add anything new - if server can be unstable, that's not prober issue.

[drey101]

@puzrin Sorry for the late reply.

The above url is a reproducible sample. Using that url, length is not returned consistently...

Aside from the above, I've noticed that it can sometimes occur for other links as well, but not very often, and there seems to be no consistency to it... For other urls, there's a very high likelihood of it returning length, but not all the time. I haven't been able to gather data yet on how often it fails with regards to the number of requests based on real world data.

[puzrin]

Sorry, i misunderstood initial post.

length is optional and not guaranteed by design, since this package use partial download. It will be set only if server send length info header. So, that's not a bug.

[drey101]

Alright, thanks!