Anyone who has experience with http-kit: how do you send "multipart/form-data" parameters? I'm currently working with the discord api and that's what it's asking for, but I can't get it to send properly. I've tried putting the data directly into the :form-params key of the request map but that didn't do it, and I've tried putting the data directly into the :body as well, also no luck.

I think I've figured it out.

@suskeyhose Let me know if you still need assistance with that. We use http-kit in our test suite to POST images etc into our API for processing.

Oh, thanks! Only issue I'm running into now is actually getting file contents into it. Not sure what's causing problems with it honestly.

I've gotten it figured out now though

hey guys can I get an extra eye please? I have this ns form failing with spec on clojure 1.10:

(ns af-rematcher.deeplink
  (:require [clojure.string :as s]
            [cemerick.url :refer [query->map]]
            [cheshire.core :as json]
            [version-clj.core :as ver]
            [com.taoensso/timbre :as timbre]))

com.taoensso/timbre

oh it should be taoensso.timbre

thanks @bronsa!

I have a tree traversal problem: I'm trying to substitute values in a tree according to a substitution map in the tree. for example, if the node [:expr {:x 1} ...] should substitute all :x child nodes with 1. here's an example:

(subst [:a [:b [:expr {:x 1} [:d :e [:f :g :x]]]] [:expr {:y 2} [:h :y]]])
=> ([:a [:b [:expr {:x 1} [:d :e [:f :g 1]]]] [:expr {:y 2} [:h 2]]])

@wei you can use a thread local to propagate the context down the recursion

@wei do you know https://github.com/nathanmarz/specter?

transform

@rodsenra thanks, i was reading https://github.com/nathanmarz/specter/wiki/Using-Specter-Recursively but it'll take a while to get my head around it

I’m trying to translate this from java to clojure:

int alpha = (pixel >> 24) & 0xff;
int red = (pixel >> 16) & 0xff;
int green = (pixel >> 8) & 0xff;
int blue = (pixel) & 0xff;

(bit-and ..... 0xff)

sweet, I had just gotten there myself 🙂

thanks!

Hi fellas, this mind-boggling error is consuming me Can't make API call blobstore.CreateEncodedGoogleStorageKey in a thread that is neither the original request thread nor a thread created by ThreadManager It's happening with me trying to do an interop where the original is

BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
BlobKey blobKey = blobstoreService.createGsBlobKey("/gs/" + bucket + "/image.jpeg");

(.createGsBlobKey (BlobstoreServiceFactory/getBlobstoreService) "/gs/crowd-hm.appspot.com/users/5644647548321792/profile/0eb6082b-f67d-46b4-ad2c-d2ef2b737ee5.jpg")

@overde sounds like that method whitelists specific threads for the call and you are trying to call it outside the allowed thread

Never stumbled in that before, how do I handle it?

you could send a function (which is a Callable) to be executed in an app-engine thread pool / thread https://cloud.google.com/appengine/docs/standard/java/runtime#threads

I think that would satisfy it (based on a common sense reading of the error message and docs at least)

it wants to impose extra coordination over what you get by default with network calls and threads I guess(?)

> if you want to call App Engine APIs (com.google.appengine.api.*), you must call those APIs from a request thread or from a thread created using the ThreadManager API.

@overde to clarify about the above, if something hands you a Thread you can use (.run t f) where f is any clojure function taking no args -- not quite right...

so I think the solution is to ask the google ThreadManager for a thread, and pass your 0 arg function to the run method of that thread

the root issue might be that you are in eg. an http server or go block some other context where new threads are created or allocated automatically to call your function

And I thought that would be just a silly mistake, sounds I need to go deeper 😄

Your explanation was awesome @noisesmith so much thanks!

@overde I need to correct myself - you can pass a function to the Thread constructor, but you can't pass one to its run method - so the real fix is different

😮

but I'm sure ThreadManager does have the thing you need

https://cloud.google.com/appengine/docs/standard/java/javadoc/com/google/appengine/api/ThreadManager.html#createBackgroundThread-java.lang.Runnable- - this is the method you need, a clojure function of zero args is a Runnable

so it's still straightforward, just not how I initially described it

@noisesmith so i've got to (ThreadManager/createBackgroundThread (BlobstoreServiceFactory/getBlobstoreService)) after the imports and had com.google.appengine.api.blobstore.BlobstoreServiceImpl cannot be cast to java.lang.Runnable

so what you do is make that call (and ancillary code if any) inside a function

(ThreadManager/createBackgroundThread (fn [] (some-other-step) (BlobstoreServiceFactory/getBlobstoreService)))

where (some-other-step) might not exist, of course

you may also need to explicitly call the Thread's run method once it has been created

Might be something like this (.run (ThreadManager/createBackgroundThread #(BlobstoreServiceFactory/getBlobstoreService))) ?

right

and you probably don't want that at a top level of the ns (otherwise it runs every time the ns is loaded or compiled)

Sure, it isn't 😉

I was taking a literal read of "after the imports" :D

ahahahaha

I find assuming common sense in software discussions is dangerous

Awesome ahaha

BUT

Current thread is not associated with any request and is not a background thread

weird

:smiling_face_with_smiling_eyes_and_hand_covering_mouth:

oh, you want the .start method, not .run - newb error on my part

it's a weird thing about the API that if you call the run method, the thread's code (if any) runs on your thread instead - I have never seen a design where that was useful

but start actually uses the thread object like you'd expect

I've wasted more time than I care to admit accidentally calling .run instead of .start in Java

I'm glad I'm not the only one

well.. didn't budge

To give more context, this is from: https://cloud.google.com/appengine/docs/standard/java/images/#using-image

is it about other methods that need to be on google owned threads, or still the same method?

Came across this trick to avoid loading files at compile time: https://stackoverflow.com/a/31333821 Does that work b/c the defs are evaluated at compile time and runtime?

Same, the snippet here is the same one you see as the first and second line over the link

OK - I think that all the api calls related to using the blob store need to be inside the function you pass to the google thread manager

if you are doing that and still see that sort of error, you might need help from someone who knows app-engine