Rick,
Thanks a lot for your thoughts. Your instincts were right. This prompted me
to check the data stream, and sure enough, seems like it never got ingested
properly. I did so manually in the Fedora admin client and can now view it
in Fedora just fine. Still not visible in Drupal via Islandora, so it
certainly suggests that Islandora is having trouble creating and viewing
this file in the repository. Will return to investigating that side of
things.
Josh
On Wed, May 1, 2013 at 5:03 PM, Richard Sarvas <[email protected]
> wrote:
> ** **
>
> Josh,****
>
> If the pack sniffer also shows the data getting truncated you might want
> to verify that the TN data stream exists in the form you are expecting in
> the fedora repo file system (not a truncated ingest). I’ve had situations
> where this has happened, though this was due to my Perl code sending binary
> content for ingest that stopped reading the binary file content at the
> first NUL char it encountered and sent the content of truncated file to
> Fedora for ingest (successfully). Mostly this happens on Windows boxes and
> ever since then I got into the habit of setting “binmode” before doing file
> reads or writes even if the Perl code will only ever run on UNIX boxes.
> Other languages running on Windows may also require something like this as
> well before doing file operations on binary files.****
>
> ** **
>
> Just mentioning it since I noticed you were using IIS.****
>
> ** **
>
> ** **
>
> Rick****
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> *From:* Josh Wilson [mailto:[email protected]]
> *Sent:* Wednesday, May 01, 2013 4:38 PM
> *To:* Support and info exchange list for Fedora users.
> *Subject:* Re: [fcrepo-user] Issue with TN datastream/PNG images****
>
> ** **
>
> Rick,
> I appreciate the suggestion. Not resolved yet, but I'm thinking along the
> same lines. I don't think it's a case of the browser not being able to read
> the data, I think the data isn't getting through. For some reason, with
> this data stream, I only get what appears to be the first 48 bytes.
> Everything else I've checked comes through fine. Just haven't figured out
> why yet. I haven't used Wireshark, but I'll give that a try to see if it
> can tell me something the other tools I'm trying can't.****
>
> ** **
>
> On Wed, May 1, 2013 at 12:22 PM, Richard Sarvas <
> [email protected]> wrote:****
>
> Josh,****
>
> In case you haven’t resolved this one yet, I’d suggest using a packet
> sniffer or CURL to see what is going on (provided you are not testing a
> localhost connection). Browsers (by design) have a pesky habit of caching
> images, so in cases like this you can’t always be sure what you are looking
> at (or not) in the browser is what is currently being delivered by the
> server. Wireshark (http://www.wireshark.org/download.html) is my current
> tool of choice but any other packet sniffer would also work. While there
> are easier ways to ways to verify what content is being sent from the
> server (such as the Firebug browser add-on or the CURL command line util) I
> prefer a packet sniffer because that’s just what I’m used to using from my
> client/server app development days. Other HTTP request monitoring tools may
> work better for you.****
>
> ****
>
> Once you’ve verified that the content is either being delivered or not
> (Fedora XACML policy in place preventing direct access except by
> localhost?) then you can move on to verifying if you browser (or more than
> one) can correctly interpret the TN image data.****
>
> ****
>
> ****
>
> Rick****
>
> ****
>
> ****
>
> *From:* Josh Wilson [mailto:[email protected]]
> *Sent:* Friday, April 26, 2013 5:08 PM
> *To:* [email protected]
> *Subject:* [fcrepo-user] Issue with TN datastream/PNG images****
>
> ****
>
> Hi all,
> I'm working on an Islandora install, using Fedora 3.5, on a Windows IIS7
> server.
>
> I've been having an ongoing issue with getting Islandora running, but I
> think I've traced the problem back to something specific with Fedora.
> Fedora doesn't seem to be able to view the TN datastream (a thumbnail PNG
> image that Islandora uses). If I browse around in Fedora, I can view all
> Islandora datastreams except for the TN, which for islandora:root is a
> folder PNG. When I try to see that in the browser (i.e.,
> http://[ipredacted]:8080/fedora35/objects/islandora:root/datastreams/TN/content)
> I
> get an error in Firefox (in IE, I just get the broken image box with a red
> X): ****
>
>
> 'The image “http://[ip
> redacted]:8080/fedora35/objects/islandora:root/datastreams/TN/content”
> cannot be displayed because it contains errors.'****
>
> I know this sort of error can have a lot of causes. I've personally seen
> something like it when I was working with some images that had been saved
> with a CMYK color scheme. But in this case it seems that the image is
> either being truncated or there's some other configuration problem with
> Fedora which prevents it from being served. I'm pretty new to Fedora and
> unfortunately I don't know how to go about diagnosing the problem in
> further detail or fixing it. Any suggestions?****
>
> Some additional observations:****
>
> --Nothing shows up in the Fedora or Tomcat logs when this error occurs.***
> *
>
> --I can see the image fine if I don't go through Fedora, i.e.,
> http://[site name]/[path to image]/folder.png****
>
> --I thought perhaps there was some PNG-specific issue, so I tried
> embedding the folder image into a Tomcat page
> ($CATALINA_HOME/webapps/ROOT/index.html), but when I go to localhost:8080
> it shows up.****
>
> Thanks for any help.****
>
>
>
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