I am trying to automate filling out a form (which includes a file upload) using Mechanize. I have gone through the process in the GUI interface and the file uploads fine, so I know the file isn't corrupt, but when I run my mechanize script it fails. The script executes correctly, and according to the debug it uploaded the file, but Canvas (the service I'm uploading to) says the file could not be read. I have contacted Canvas support but they are unable to help since it's a non-standard use of their system.
Here is the script (which has been anonymized):
09 mech = Mechanize.new
10 mech.log = Logger.new(STDOUT)
11 mech.user_agent_alias = 'Mac Mozilla'
12 mech.get("https://ucdenver.test.instructure.com") do |page|
13 page.form_with(:action => "/login") do |f|
14 user_field = f.field_with(:name => "pseudonym_session[unique_id]")
15 user_field.value = user
16 pwd_field = f.field_with(:name => "pseudonym_session[password]")
17 pwd_field.value = pwd
18 end.submit
19 end
20
21 mech.get("https://ucdenver.test.instructure.com/accounts/1") do |page|
22 page.form_with(:action => "/accounts/1/courses") do |f|
23 course_field = f.field_with(:name => "course[name]")
24 course_field.value = "38492"
25 end.submit
26 end
27
28 mech.page.link_with(:href => %r/settings/,
29 :class => "settings").click
30
31 mech.page.link_with(:href => %r/import/,
32 :text => %r/Import Content/).click
33
34 mech.page.link_with(:href => %r/imports\/migrate/,
35 :text => %r/Import content from a content package/).click
36
37 mech.page.form_with(:action => %r/imports\/migrate/) do |f|
38 export_system = "migration_settings[migration_type]"
39 f[export_system] = "blackboard_exporter"
40 f.file_uploads.first.mime_type = "application/zip"
41 f.file_uploads.first.file_name = bkb_export
42 end.submit
Canvas support said the server is returning:
Could not unzip archive file, exit status 9, message:
[/mnt/var/web/migration_tool/data/attachment_420130214-13303-sv6ue5-0.jpg] End-of-central-
directory signature not found. Either this file is not a zipfile, or it constitutes one
disk of a multi-part archive. In the latter case the central directory and zipfile comment
will be found on the last disk(s) of this archive. unzip: cannot find zipfile directory in
one of /mnt/var/web/migration_tool/data/attachment_420130214-13303-sv6ue5-0.jpg or
/mnt/var/web/migration_tool/data/attachment_420130214-13303-sv6ue5-0.jpg.zip, and cannot
find /mnt/var/web/migration_tool/data/attachment_420130214-13303-sv6ue5-0.jpg.ZIP, period.
Unfortunately that error makes no sense to me, but it seems odd that it references a couple of .jpg's when the script is uploading a .zip file. Any ideas or assistance would be greatly appreciated, and I'm happy to provide additional information if I've left anything useful out.
If you're really feeling like a go getter you can sign up for a free account at http://canvas.instructure.com and see the code/network activity for yourself.
