From 13c2bb6407bb426d5f831f101615a7d917841308 Mon Sep 17 00:00:00 2001
From: blek <me@blek.codes>
Date: Sun, 5 Nov 2023 15:25:21 +1000
Subject: [PATCH] add option to configure min size to cache proxy

---
 resource/go.mod                 |  1 +
 resource/go.sum                 |  2 ++
 resource/main.go                | 16 +++++++++++++---
 resource/resourced.toml.example |  5 +++++
 4 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/resource/go.mod b/resource/go.mod
index 0ee4b39..4333b70 100644
--- a/resource/go.mod
+++ b/resource/go.mod
@@ -5,6 +5,7 @@ go 1.21.3
 require (
 	github.com/BurntSushi/toml v1.3.2 // indirect
 	github.com/andybalholm/brotli v1.0.5 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/gofiber/fiber/v2 v2.50.0 // indirect
 	github.com/google/uuid v1.3.1 // indirect
 	github.com/klauspost/compress v1.16.7 // indirect
diff --git a/resource/go.sum b/resource/go.sum
index 76c49cb..c9e3a79 100644
--- a/resource/go.sum
+++ b/resource/go.sum
@@ -2,6 +2,8 @@ github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8
 github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=
 github.com/andybalholm/brotli v1.0.5/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/gofiber/fiber/v2 v2.50.0 h1:ia0JaB+uw3GpNSCR5nvC5dsaxXjRU5OEu36aytx+zGw=
 github.com/gofiber/fiber/v2 v2.50.0/go.mod h1:21eytvay9Is7S6z+OgPi7c7n4++tnClWmhpimVHMimw=
 github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
diff --git a/resource/main.go b/resource/main.go
index 513c349..2822d34 100644
--- a/resource/main.go
+++ b/resource/main.go
@@ -12,6 +12,7 @@ import (
 import (
 	"github.com/BurntSushi/toml"
 	"github.com/gofiber/fiber/v2"
+	"github.com/dustin/go-humanize"
 )
 
 type Resource struct {
@@ -24,8 +25,9 @@ func (self Resource) Get() ([]byte, error) {
 }
 
 type ResourceDConfig struct {
-	Enabled		bool `toml:"enabled"`
-	ListenURL	string `toml:"listen_url"`
+	Enabled				bool 	`toml:"enabled"`
+	ListenURL			string 	`toml:"listen_url"`
+	ProxyCacheMinSize	string	`toml:"proxy_cache_min_size",default:5MB`
 }
 
 type Config struct {
@@ -58,12 +60,16 @@ func (self Resource) GetProxied() ([]byte, error) {
 	buf, err := ioutil.ReadAll(resp.Body)
 	if err != nil { return make([]byte, 0, 0), err }
 
-	ProxyResourceCache[self.Url] = buf
+	// cache only those that are less than 5 mb
+	if len(buf) > ProxyCacheMinSize {
+		ProxyResourceCache[self.Url] = buf
+	}
 	
 	return buf, nil
 }
 
 var ProxyResourceCache map[string][]byte = make(map[string][]byte)
+var ProxyCacheMinSize int
 
 func main() {
 	var conf Config
@@ -75,6 +81,10 @@ func main() {
 	if err != nil { panic(err) }
 	_ = a
 
+	cache_min, err := humanize.ParseBytes(conf.ResourceD.ProxyCacheMinSize)
+	if err != nil { panic(err) }
+	ProxyCacheMinSize = int(cache_min)
+
 	conf.Validate()
 	
 	app := fiber.New(fiber.Config {
diff --git a/resource/resourced.toml.example b/resource/resourced.toml.example
index e8fca0e..043888b 100644
--- a/resource/resourced.toml.example
+++ b/resource/resourced.toml.example
@@ -11,6 +11,11 @@ Enabled=true
 # URL to listen on
 ListenUrl="0.0.0.0:80"
 
+# Minibal size of a file to be cached
+# File size is parsed via this library:
+# https://github.com/dustin/go-humanize
+proxy_cache_min_size="5MB"
+
 # Resource ID must be like a java package name
 # At least one X.X. is required
 #