MrTrick

filters.source:
function(doc, req) {
  if(!req.query.source)
    throw("Please provide a query parameter `source`.");

  if (doc.source && doc.source == req.query.source)
    return true;
  else
    return false;
}

MrTrick

[Tue, 14 Sep 2010 05:44:03 GMT] [error] [<0.98.0>] {error_report,<0.30.0>,
    {<0.98.0>,crash_report,
     [[{pid,<0.98.0>},
       {registered_name,[]},
       {error_info,
           {exit,
               {{badmatch,{error,eacces}},
                [{couch_file,init,1},
                 {gen_server,init_it,6},
                 {proc_lib,init_p_do_apply,3}]},

MrTrick

//Response produced when using no credentials,
//$ curl http://minion:5984/cgm/_fti/_design/couchapp/user 
//
{"error":"unauthorized","reason":"You are not authorized to access this db."}

MrTrick

May your signals all trap 
May your references be bounded 
All memory aligned 
Floats to ints rounded 

Remember ...

Non-zero is true 
++ adds one 
Arrays start with zero 

MrTrick

[root@limbo /]# chmod 777 /var/import/cass
[root@limbo /]# su hubprod -c "touch /var/import/cass/test.txt"
touch: cannot touch `/var/import/cass/test.txt': Permission denied

MrTrick

Encryption / Decryption : Alice and Bob (and Eve!) [DRAFT]

Overview:

* Teams must devise a novel ciphering scheme in a short amount of time.
* Each team nominates a 'transmitter', who attempts to securely send a given message back to their team.
* Each team attempts to decode their own message, and intercept the messages of other teams.


Scenario:

MrTrick

Two types of documents (well four, but two in this use case)

Roles:
{
   "_id": "role:00000390_student_11009_2010_AUT_U_1_S_group4",
   "_rev": "1-82412c94266f8be1d4374313d586860d",
   "doc_type": "role",
   "source": "admin",
   "status": "active",
   "role_type": "student",

MrTrick

CREATE TABLE 'AcademicSubjectAssociation' (
  'login' char(40) NOT NULL default '',
  'subject' char(7) NOT NULL default '',
  'year' int(11) NOT NULL default '2000',
  'semester' char(10) NOT NULL default 'autumn', /* enum('autumn','winter','spring','summer') NOT NULL default 'autumn', */
  'association' char(10) NOT NULL default 'tutor', /*enum('coordinator','assessor','lecturer','tutor','liaison','marker','admin','markedit','other','listowner','proposer','propadmin') NOT NULL default 'tutor',*/
  UNIQUE ('login','subject','year','semester','association')
);
CREATE INDEX 'asa_login2' ON 'AcademicSubjectAssociation' ('login','subject','year','semester');
CREATE INDEX 'asa_login3' ON 'AcademicSubjectAssociation' ('login','subject');

MrTrick

[minion@minion cgm]$ php tools/update_couch_design.php
Access granted.
Building staging design...done.
Uploading staging design...done.
Rebuilding all views (this may take a long time, you can track progress in the futon status window) ... done. Elapsed time: 12 seconds
Rebuilding lucene views (this may take a long time, too) ... done. Elapsed time: 8 seconds
Uploading production design...done.
Checking view signatures...done. Both signatures are: 7bfe586167ab93ee5c5320833b336201
Testing a production view (this should be immediate) ...done. Elapsed time: 0 seconds
Testing a production lucene view (this should be immediate) ...done. Elapsed time: 8 seconds

MrTrick

<?

....

//Build and load the design into an object 
echo "Building staging design...";
chdir('../install/couchapp');
$ddocstr = shell_exec('couchapp push --export');
$ddoc = json_decode($ddocstr);
$ddoc_staging = clone $ddoc;