In the before time (late 90s) I worked for a company that worked for a company that worked for a company that provided software engineering services for NRC regulatory compliance. Fallout radius simulation, security access and checks, operational reporting, that sort of thing. Given that, I spent a lot of time around/at/in nuclear reactors.

One day, we're working on this system that uses RFID (before it was cool) and various physical sensors to do a few things, one of which is to determine if people exist at the intersection of hazardous particles, gasses, etc.

This also happens to be a system which, at that moment, is reporting hazardous conditions and people at the top of the outer containment shell. We know this is probably a red herring or faulty sensor because no one is present in the system vs the access logs and cameras, but we have to check anyways. A few building engineers climb the ladders up there and find that nothing is really visibly wrong and we have an all clear. They did not however know how to check the sensor.

Enter me, the only person from our firm on site that day. So in the next few minutes I am also in a monkey suit (bc protocol), climbing a 150 foot ladder that leads to another 150 foot ladder, all 110lbs of me + a 30lb diag "laptop" slung over my shoulder by a strap. At the top, I walk about a quarter of the way out, open the casing on the sensor module and find that someone had hooked up the line feed, but not the activity connection wire so it was sending a false signal. I open the diag laptop, plug it into the unit, write a simple firmware extension to intermediate the condition, flash, reload. I verify the error has cleared and an appropriate message was sent to the diagnostic system over the radio, run through an error test cycle, radio again, close it up. Once I returned to the ground, sweating my ass off, I also send a not at all passive aggressive email letting the boss know that the next shift will need to push the update to the other 600 air-gapped, unidirectional sensors around the facility.

Why red herring is important between discussions.

My daughter: Papa! See this is my name and this is the name of my Sir.

I: No my little princess!! This is our surname.

My daughter: oh ok!! Who is that?

I: Ummm... (No answer) Wow!! You're wearing a beautiful dress today...

PM: Page load times are up. It might be your API blocking requests.

Me: Possible, though most of my load testing was performed against a random sample of requests at nearly 5 times the expected average per minute rate. I can add some logs but I think this is a red herring theory.

PM: Yes add logs, and New Relic and get it released ASAP.

Me: To confirm, you want me to make a bunch of diagnostic changes to a mission-critical API the day before Holiday break...

I felt like that guy from the Apollo 13 team warning Gene Kranz that the LEM was not built for this and I can make no guarantees... Released an hour before we went home for the weekend.

When I hit the endpoint from Postman it works. When I hit the endpoint from my application that pushes data to the endpoint it doesn't work, returning a 404 status code. I KNOW the endpoint is there and operational and that both Postman and my application have the same endpoint configured, letter for letter.

So lost. So confused. What the hell is going on.

I decide to install Fiddler to monitor the traffic to see if I can see anything helpful.

I initiate the request again from the application and immediately see that the request size is huge. BAM. It immediately hits me, the payload to the endpoint is too big and the server is "rejecting" it with a 404. I post a smaller request with the application and it works fine.

Yay, saved by Fiddler.

Why does the endpoint default to 404 in such scenarios. The definition of 404: "the client was able to communicate with a given server, but the server could not find what was requested"

In my case, the 404 returned was a red herring. I understand that the substatus code gives more information on why the 404 was returned, in my case the request size being too big, but 404 in general feels like the wrong status code to return because the endpoint IS there. It made me troubleshoot the wrong thing.

Thanks, IIS.

anyone work on no code platforms? I still get caught up in simple traps on this thing regularly even after a few years. damn there are a lot of fucking boxes to check. I’m often chasing a red herring and missing the actual issue.

whether its me thinking the bug is in the platform itself or god know whatever else it is I miss.

and I never know if I wouldve ever figured it out myself because a lot of times someone else comes in first to fix it.

oh well

#Suphle Rant 6: Deptrac, phparkitect

This entry isn't necessarily a rant but a tale of victory. I'm no more as sad as I used to be. I don't work as hard as I used to, so lesser challenges to frustrate my life. On top of that, I'm not bitter about the pace of progress. I'm at a state of contentment regarding Suphle's release

An opportunity to gain publicity presented itself last month when cfp for a php event was announced last month. I submitted and reviewed a post introducing suphle to the community. In the post, I assured readers that I won't be changing anything soon ie the apis are cast in stone. Then php 7.4 officially "went out of circulation". It hit me that even though the code supports php 8 on paper, it's kind of a red herring that decorators don't use php 8 attributes. So I doubled down, suspending documentation.

The container won't support union and intersection types cuz I dislike the ambiguity. Enums can't be hydrated. So I refactored implementation and usages of decorators from interfaces to native attributes. Tried automating typing for all class properties but psalm is using docblocks instead of native typing. So I disabled it and am doing it by hand whenever something takes me to an unfixed class (difficulty: 1). But the good news is, we are php 8 compliant as anybody can ask for!

I decided to ride that wave and implement other things that have been bothering me:
1) 2 commands for automating project setup for collaborators and user facing developers (CHECK)
2) transferring some operations from runtime to compile/build TIME (CHECK)
3) re-attempt implementing container scopes

I tried automating Deptrac usage ie adding the newly created module to the list of regulated architectural layers but their config is in yaml, so I moved to phparkitect which uses php to set the rules. I still can't find a library for programmatically updating php filed/classes but this is more dynamic for me than yaml. I set out to implement their library, turns out the entire logic is dumped into the command class, so I can neither control it without the cli or automate tests to it. I take the command apart, connect it to suphle and run. Guess what, it detects class parents as violations to the rule. Wtflyingfuck?!

As if that's not bad enough, roadrunner (that old biatch!) server setup doesn't fail if an initialization script fails. If initialization script is moved to the application code itself, server setup crumbles and takes the your initialization stuff down with it. I ping the maintainer, rustacian (god bless his soul), who informs me point blank that what I'm trying to do is not possible. Fuck it. I have to write a wrapper command for sequentially starting the server (or not starting if initialization operations don't all succeed).

Legitimate case to reinvent the wheel. I restored my deleted decorators that did dependency sanitation for me at runtime. The remaining piece of the puzzle was a recursive film iterator to feed the decorators. I checked my file system reader for clues on how to implement one and boom! The one I'd written for two other features was compatible. All I had to do was refactor decorators into dependency rules, give them fancy interfaces for customising and filtering what classes each rule should actually evaluate. In a night's work (if you're discrediting how long writing the original sanitization decorators and directory iterator), I coupled the Deptrac/phparkitect library of my dreams. This is one of the those few times I feel like a supreme deity

Hope I can eat better and get some sleep. This meme is me after getting bounced by those three library rejections