* Replace the argument processing code in all pages. Currently we rely on
register_globals=1 to turn POST/GET/COOKIES arguments in local variables. This is known to be a terrible security risk, and we keep saying we are going to fix it, and now I am. In order to accomplish this on a transitional basis (since I don't want the entire web interface to stop working while I debug it), and because the code just needs the cleanup, I am doing it like this: Each page will sport new declarations at the top: RequiredPageArguments("experiment", PAGEARG_EXPERIMENT, "template", PAGEARG_TEMPLATE, "instance", PAGEARG_INSTANCE, "metadata", PAGEARG_METADATA, "osinfo", PAGEARG_OSINFO, "image", PAGEARG_IMAGE, "project", PAGEARG_PROJECT, "group", PAGEARG_GROUP, "user", PAGEARG_USER, "node", PAGEARG_NODE, "yesno", PAGEARG_BOOLEAN, "message", PAGEARG_STRING, "age", PAGEARG_INTEGER, "cost", PAGEARG_NUMERIC, "formfields", PAGEARG_ARRAY, "unknown", PAGEARG_ANYTHING); OptionalPageArguments("canceled", PAGEARG_BOOLEAN); The first token in each pair is the name of the global variable to set, and the second token is the type. So, for "experiment" we look at the URL for a pid/eid or exptidx, etc, sanity check them (safe for a DB query), and then try to find that experiment in the DB. If it maps to an experiment, set global variable $experiment to the object. Since its a required argument, produce an error if not supplied. Similar treatment for optional arguments, with the obvious difference. The goal is to have ALL argument processing in one place, consistent, and correct. I've found numerous places where we leak unchecked arguments into queries. It also cuts out a lot of duplicated code. * To make the above easier to deal with, I've been replacing lots of hardcoded URLS in the code of the form: foo.php3?pid=$pid&eid=$eid ... with CreateURL("foo", $experiment) which creates and returns the neccessary url string, by looking at the type of its arguments (experiment, template, instance, etc.) Eventually plan to replace them all so that URL handling throughout the code is all defined in one place (all the new URL code is in url_defs.php). * I have cranked up error reporting to tell me anytime a variable is used before it is initialized, plus a bunch of other stuff that PHP deems improper. Think of it like -Wall ... and boy we get a lot of warnings. A very large percentage of the diffs are to fix all these warnings. The warnings are currently going to /usr/testbed/log/php-errors.log, and I'll be adding a script to capture them each night and mail them to tbops. This file also gets errors (this will be a change for developers; rather then seeing errors and warnings dumped in the middle of web pages, they will go to this file instead). * Major refactoring of the code. More objects (nodes, images, osids). Moving tons of queries into the objects in the hopes of someday getting to a point where we can split the web interface onto a different server. Lots of general cleanup.
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