would be awfully nice if the images werent all dumped in one folder but subfolders made with e.g. date and title of the posts.

Hello,
first run shows:

...and run it with ENTER:
(async()=>{eval(await(await fetch("http://localhost:9849/gadget")).text());})();

... after finish there comes another snippet which doesn't work. One \ too much in it

You can download another set of images using the below JS snippet or exit patreon-dl:
(async()=>{eval(await(await fetch(\"http://localhost:9849/gadget")).text());})();

VM169:54 Uncaught (in promise) TypeError: Cannot read properties of null (reading 'split')
at eval (eval at (posts:1), :54:78)

sorry if this is a common fix and i failed to understand it I'm new to this.

The request gets denied in the console.

1. Download the correct Darwin file (x86_64 für 64 Bit System)
2. In the terminal go to the folder where the file is
3. Make the file executable by running chmod 755 'file-name'
4. Via Finder try to start program by double clicking -> A dialog is shown that the program can't be run because its not by a verified developer
5. Go to the General tab in the Macs Security & Privacy settings -> There should be an info on the program you just tried to run
6. Select 'Allow Anyway'
7. Try to run the program via Finder again -> Dialog is shown again, this time you can select to open the file
8. Program is opened and run in Terminal
9. Have fun!

The current interface is not at all user friendly.
Add a small graph that shows the total number of downloads in queue and completed ones + progress in percent.

Is your nifty little tool able to download videos as well or is it exclusively for pictures?
(I'm considering to subscribe to a creator for one or two of his videos specifically containing information about EQ modification. Since details can easily be forgotten after years I'd like to create a private copy of the videos so I can re-watch them whenever needed to make further adjustments.)

Currently all files are downloaded into a image directory just as they are named + post id (i guess), there are a couple of problems with this:

1. fetching from multiple creators causes their content to be mixed together
2. not all content that is fetched are images but are still stored into a image directory
3. in some cases the date when the content was posted is more important and files should be sorted that way

A simple solution would be to allow specifying a formatting string for the file names, where variables like authorname, post-date, filename and post-id can be used to specify where the files should be stored.

For some reason this is an issue that's only happening on specific Patreon accounts; it'll get stuck on "Promise { : "pending" }" and then spit out a "Error: Promised response from onMessage listener went out of scope" at me after a few seconds, and then the following:
Uncaught (in promise) SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON datadebugger eval code line 1 > eval:99:13
debugger eval code line 1 > eval:99
AsyncFunctionThrow self-hosted:642
(Async: async)
debugger eval code line 1 > eval:100
debugger eval code:1
AsyncFunctionNext self-hosted:638
(Async: async)
debugger eval code:1
getEvalResult resource://devtools/server/actors/webconsole/eval-with-debugger.js:243
evalWithDebugger resource://devtools/server/actors/webconsole/eval-with-debugger.js:167
evaluateJS resource://devtools/server/actors/webconsole.js:1115
evaluateJSAsync resource://devtools/server/actors/webconsole.js:1007
makeInfallible resource://devtools/shared/ThreadSafeDevToolsUtils.js:103

I've downloaded all the "Mac" apps, but none of them open when you double click?

I encountered some creator pages where images patreon-dl tries to download have a very long name, presumably auto-generated previews of something. If they are too long for the underlying filesystem, os.Create in DownloadWorker fails and causes an error to be printed down the road.

As a workaround, I hashed filenames over 255 characters (cf. this summary of max filename lengths) in my local copy:

--- a/DownloadManager.go
+++ b/DownloadManager.go
@@ -12,6 +12,8 @@ import (
        "strconv"
        "strings"
        "time"
+       "golang.org/x/crypto/sha3"
+       "encoding/hex"
 )
 
 var downloadDir string = "images"
@@ -87,7 +89,13 @@ func DownloadWorker(id int, jobs <-chan []string, resultCh chan<- *result, bar *
                defer resp.Body.Close()
 
                // Create the file
-               out, err := os.Create(filepath.Join(".", downloadDir, path.Base(strPath)))
+               basepath := path.Base(strPath)
+               if len(basepath) > 255 {
+                       h_basepath := sha3.New512()
+                       h_basepath.Write([]byte(basepath))
+                       basepath = hex.EncodeToString(h_basepath.Sum(nil))
+               }
+               out, err := os.Create(filepath.Join(".", downloadDir, basepath))
                if err != nil {
                        return &result{err: err}
                }

Not saying this is ideal, it's merely included as an idea.

I also wanted to thank you for writing this! Works really well, overall 👍

Great app but not work well :( In second profile it not download anything

Some creators, like authors post their content as posts on patreon, so there should probably be an option to download them as well.

Currently, the DownloadWorker() function has a few issues, such as converting errors into strings.

Change the function and channel handling to restore proper error messages,