Major code cleanup

config.example.yml

@@ -11,56 +11,47 @@ routes:
   face:
     default_overlay: true
     default_download: false
-    default_fallback: true
     default_scale: 4
     min_scale: 1
     max_scale: 64
   head:
     default_overlay: true
     default_download: false
-    default_fallback: true
     default_scale: 4
     min_scale: 1
     max_scale: 64
   full_body:
     default_overlay: true
     default_download: false
-    default_fallback: true
     default_scale: 4
     min_scale: 1
     max_scale: 64
   front_body:
     default_overlay: true
     default_download: false
-    default_fallback: true
     default_scale: 4
     min_scale: 1
     max_scale: 64
   back_body:
     default_overlay: true
     default_download: false
-    default_fallback: true
     default_scale: 4
     min_scale: 1
     max_scale: 64
   left_body:
     default_overlay: true
     default_download: false
-    default_fallback: true
     default_scale: 4
     min_scale: 1
     max_scale: 64
   right_body:
     default_overlay: true
     default_download: false
-    default_fallback: true
     default_scale: 4
     min_scale: 1
     max_scale: 64
   raw_skin:
     default_download: false
-    default_fallback: true
 cache:
-  uuid_cache_duration: 168h # 1 week
   skin_cache_duration: 12h # 12 hours
   render_cache_duration: 12h # 12 hours

go.mod

@@ -4,7 +4,7 @@ go 1.18
 
 require (
 	github.com/go-redis/redis/v8 v8.11.5
-	github.com/gofiber/fiber/v2 v2.47.0
+	github.com/gofiber/fiber/v2 v2.48.0
 	github.com/mineatar-io/skin-render v1.0.9
 	gopkg.in/yaml.v3 v3.0.1
 )
@@ -19,11 +19,7 @@ require (
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
 	github.com/mattn/go-runewidth v0.0.14 // indirect
-	github.com/philhofer/fwd v1.1.2 // indirect
 	github.com/rivo/uniseg v0.4.4 // indirect
-	github.com/savsgio/dictpool v0.0.0-20221023140959-7bf2e61cea94 // indirect
-	github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee // indirect
-	github.com/tinylib/msgp v1.1.8 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.48.0 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect

go.sum

@@ -8,8 +8,8 @@ github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cu
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/go-redis/redis/v8 v8.11.5 h1:AcZZR7igkdvfVmQTPnu9WE37LRrO/YrBH5zWyjDC0oI=
 github.com/go-redis/redis/v8 v8.11.5/go.mod h1:gREzHqY1hg6oD9ngVRbLStwAWKhA0FEgq8Jd4h5lpwo=
-github.com/gofiber/fiber/v2 v2.47.0 h1:EN5lHVCc+Pyqh5OEsk8fzRiifgwpbrP0rulQ4iNf3fs=
+github.com/gofiber/fiber/v2 v2.48.0 h1:cRVMCb9aUJDsyHxGFLwz/sGzDggdailZZyptU9F9cU0=
-github.com/gofiber/fiber/v2 v2.47.0/go.mod h1:mbFMVN1lQuzziTkkakgtKKdjfsXSw9BKR5lmcNksUoU=
+github.com/gofiber/fiber/v2 v2.48.0/go.mod h1:xqJgfqrc23FJuqGOW6DVgi3HyZEm2Mn9pRqUb2kHSX8=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/klauspost/compress v1.16.7 h1:2mk3MPGNzKyxErAw8YaohYh69+pa4sIQSC0fPGCFR9I=
@@ -33,78 +33,25 @@ github.com/mineatar-io/skin-render v1.0.9/go.mod h1:KkgHwrhTIqD73dkmeQwh5k2aHuWS
 github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
 github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
 github.com/onsi/gomega v1.18.1 h1:M1GfJqGRrBrrGGsbxzV5dqM2U2ApXefZCQpkukxYRLE=
-github.com/philhofer/fwd v1.1.1/go.mod h1:gk3iGcWd9+svBvR0sR+KPcfE+RNWozjowpeBVG3ZVNU=
-github.com/philhofer/fwd v1.1.2 h1:bnDivRJ1EWPjUIRXV5KfORO897HTbpFAQddBdE8t7Gw=
-github.com/philhofer/fwd v1.1.2/go.mod h1:qkPdfjR2SIEbspLqpe1tO4n5yICnr2DY7mqEx2tUTP0=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
 github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
-github.com/savsgio/dictpool v0.0.0-20221023140959-7bf2e61cea94 h1:rmMl4fXJhKMNWl+K+r/fq4FbbKI+Ia2m9hYBLm2h4G4=
-github.com/savsgio/dictpool v0.0.0-20221023140959-7bf2e61cea94/go.mod h1:90zrgN3D/WJsDd1iXHT96alCoN2KJo6/4x1DZC3wZs8=
-github.com/savsgio/gotils v0.0.0-20220530130905-52f3993e8d6d/go.mod h1:Gy+0tqhJvgGlqnTF8CVGP0AaGRjwBtXs/a5PA0Y3+A4=
-github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee h1:8Iv5m6xEo1NR1AvpV+7XmhI4r39LGNzwUL4YpMuL5vk=
-github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee/go.mod h1:qwtSXrKuJh/zsFQ12yEE89xfCrGKK63Rr7ctU/uCo4g=
-github.com/tinylib/msgp v1.1.6/go.mod h1:75BAfg2hauQhs3qedfdDZmWAPcFMAvJE5b9rGOMufyw=
-github.com/tinylib/msgp v1.1.8 h1:FCXC1xanKO4I8plpHGH2P7koL/RzZs12l/+r7vakfm0=
-github.com/tinylib/msgp v1.1.8/go.mod h1:qkpG+2ldGg4xRFmx+jfTvZPxfGFhi64BcnL9vkCm/Tw=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.48.0 h1:oJWvHb9BIZToTQS3MuQ2R3bJZiNSa2KiNdeI8A+79Tc=
 github.com/valyala/fasthttp v1.48.0/go.mod h1:k2zXd82h/7UZc3VOdJ2WaUqt1uZ/XpXAfE9i+HBC3lA=
 github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVSA8=
 github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
-github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.7.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.3.0/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
 golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.3.0/go.mod h1:q750SLmJuPmVoN1blW3UFBPREJfb1KmY3vwxfr+nFDA=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
 golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20201022035929-9cf592e881e9/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.4.0/go.mod h1:UE5sM2OK9E/d67R0ANs2xJizIymRP5gJU295PvKXxjQ=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

src/config.go

@@ -24,7 +24,6 @@ var (
 			Face: RouteConfig{
 				DefaultOverlay:  true,
 				DefaultDownload: false,
-				DefaultFallback: true,
 				DefaultScale:    4,
 				MinScale:        1,
 				MaxScale:        64,
@@ -32,7 +31,6 @@ var (
 			Head: RouteConfig{
 				DefaultOverlay:  true,
 				DefaultDownload: false,
-				DefaultFallback: true,
 				DefaultScale:    4,
 				MinScale:        1,
 				MaxScale:        64,
@@ -40,7 +38,6 @@ var (
 			FullBody: RouteConfig{
 				DefaultOverlay:  true,
 				DefaultDownload: false,
-				DefaultFallback: true,
 				DefaultScale:    4,
 				MinScale:        1,
 				MaxScale:        64,
@@ -48,7 +45,6 @@ var (
 			FrontBody: RouteConfig{
 				DefaultOverlay:  true,
 				DefaultDownload: false,
-				DefaultFallback: true,
 				DefaultScale:    4,
 				MinScale:        1,
 				MaxScale:        64,
@@ -56,7 +52,6 @@ var (
 			BackBody: RouteConfig{
 				DefaultOverlay:  true,
 				DefaultDownload: false,
-				DefaultFallback: true,
 				DefaultScale:    4,
 				MinScale:        1,
 				MaxScale:        64,
@@ -64,7 +59,6 @@ var (
 			LeftBody: RouteConfig{
 				DefaultOverlay:  true,
 				DefaultDownload: false,
-				DefaultFallback: true,
 				DefaultScale:    4,
 				MinScale:        1,
 				MaxScale:        64,
@@ -72,20 +66,17 @@ var (
 			RightBody: RouteConfig{
 				DefaultOverlay:  true,
 				DefaultDownload: false,
-				DefaultFallback: true,
 				DefaultScale:    4,
 				MinScale:        1,
 				MaxScale:        64,
 			},
 			RawSkin: RouteConfig{
 				DefaultDownload: false,
-				DefaultFallback: true,
 			},
 		},
 		Cache: CacheConfig{
-			UUIDCacheDuration:   time.Hour * 168,
+			SkinCacheDuration:   PointerOf(time.Hour * 12),
-			SkinCacheDuration:   time.Hour * 12,
+			RenderCacheDuration: PointerOf(time.Hour * 12),
-			RenderCacheDuration: time.Hour * 12,
 		},
 	}
 )
@@ -116,7 +107,6 @@ type RoutesConfig struct {
 type RouteConfig struct {
 	DefaultScale    int  `yaml:"default_scale"`
 	DefaultOverlay  bool `yaml:"default_overlay"`
-	DefaultFallback bool `yaml:"default_fallback"`
 	DefaultDownload bool `yaml:"default_download"`
 	MinScale        int  `yaml:"min_scale"`
 	MaxScale        int  `yaml:"max_scale"`
@@ -133,9 +123,8 @@ type RedisConfig struct {
 
 // CacheConfig is the configuration data used to set TTL values for Redis keys.
 type CacheConfig struct {
-	UUIDCacheDuration   time.Duration `yaml:"uuid_cache_duration"`
+	SkinCacheDuration   *time.Duration `yaml:"skin_cache_duration"`
-	SkinCacheDuration   time.Duration `yaml:"skin_cache_duration"`
+	RenderCacheDuration *time.Duration `yaml:"render_cache_duration"`
-	RenderCacheDuration time.Duration `yaml:"render_cache_duration"`
 }
 
 // ReadFile reads the configuration from the file and parses it as YAML.

src/main.go

@@ -1,11 +1,11 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"net/http"
 	"os"
-	"os/signal"
+	"strconv"
-	"syscall"
 
 	"github.com/gofiber/fiber/v2"
 	"github.com/gofiber/fiber/v2/middleware/cors"
@@ -61,13 +61,23 @@ func init() {
 }
 
 func main() {
+	if v := os.Getenv("PROFILE"); len(v) > 0 {
+		port, err := strconv.ParseUint(v, 10, 16)
+
+		if err != nil {
+			panic(err)
+		}
+
+		go Profile(uint16(port))
+
+		log.Printf("Profiler is listening on :%d\n", port)
+	}
+
 	defer r.Close()
 
-	go ListenAndServe(conf.Host, conf.Port+instanceID)
+	log.Printf("Listening on %s:%d\n", conf.Host, conf.Port+instanceID)
 
-	defer app.Shutdown()
+	if err := app.Listen(fmt.Sprintf("%s:%d", conf.Host, conf.Port+instanceID)); err != nil {
-
+		panic(err)
-	s := make(chan os.Signal, 1)
+	}
-	signal.Notify(s, os.Interrupt, syscall.SIGTERM)
-	<-s
 }

src/profiler.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"net/http/pprof"
+)
+
+// Profile is a Goroutine for automatically profiling the program for optimization and debug reasons.
+func Profile(port uint16) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", pprof.Profile)
+
+	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", port), mux))
+}

src/routes.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"github.com/gofiber/fiber/v2"
-	"github.com/mineatar-io/skin-render"
 )
 
 func init() {
@@ -64,347 +63,6 @@ func ListHandler(ctx *fiber.Ctx) error {
 	return ctx.JSON(result)
 }
 
-// FullBodyHandler is the API handler used for the `/body/full/:uuid` route.
-func FullBodyHandler(ctx *fiber.Ctx) error {
-	opts := ParseQueryParams(ctx, conf.Routes.FullBody)
-
-	uuid, ok := ParseUUID(ExtractUUID(ctx))
-
-	if !ok {
-		return SendUsernameDeprecation(ctx)
-	}
-
-	cacheKey := fmt.Sprintf("result:fullbody-%d-%t-%s", opts.Scale, opts.Overlay, uuid)
-
-	data, err := r.GetBytes(cacheKey)
-
-	if err != nil {
-		return err
-	}
-
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(data != nil))
-
-	if data == nil {
-		rawSkin, slim, err := GetPlayerSkin(uuid)
-
-		if err != nil {
-			return err
-		}
-
-		if data, err = EncodePNG(skin.RenderBody(rawSkin, skin.Options{
-			Overlay: opts.Overlay,
-			Slim:    slim,
-			Scale:   opts.Scale,
-		})); err != nil {
-			return err
-		}
-
-		if err = r.Set(cacheKey, data, conf.Cache.RenderCacheDuration); err != nil {
-			return err
-		}
-	}
-
-	if opts.Download {
-		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
-	}
-
-	return ctx.Type("png").Send(data)
-}
-
-// FrontBodyHandler is the API handler used for the `/body/front/:uuid` route.
-func FrontBodyHandler(ctx *fiber.Ctx) error {
-	opts := ParseQueryParams(ctx, conf.Routes.FrontBody)
-
-	uuid, ok := ParseUUID(ExtractUUID(ctx))
-
-	if !ok {
-		return SendUsernameDeprecation(ctx)
-	}
-
-	cacheKey := fmt.Sprintf("result:frontbody-%d-%t-%s", opts.Scale, opts.Overlay, uuid)
-
-	data, err := r.GetBytes(cacheKey)
-
-	if err != nil {
-		return err
-	}
-
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(data != nil))
-
-	if data == nil {
-		rawSkin, slim, err := GetPlayerSkin(uuid)
-
-		if err != nil {
-			return err
-		}
-
-		data, err = EncodePNG(skin.RenderFrontBody(rawSkin, skin.Options{
-			Overlay: opts.Overlay,
-			Slim:    slim,
-			Scale:   opts.Scale,
-		}))
-
-		if err != nil {
-			return err
-		}
-
-		if err = r.Set(cacheKey, data, conf.Cache.RenderCacheDuration); err != nil {
-			return err
-		}
-	}
-
-	if opts.Download {
-		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
-	}
-
-	return ctx.Type("png").Send(data)
-}
-
-// BackBodyHandler is the API handler used for the `/body/back/:uuid` route.
-func BackBodyHandler(ctx *fiber.Ctx) error {
-	opts := ParseQueryParams(ctx, conf.Routes.BackBody)
-
-	uuid, ok := ParseUUID(ExtractUUID(ctx))
-
-	if !ok {
-		return SendUsernameDeprecation(ctx)
-	}
-
-	cacheKey := fmt.Sprintf("result:backbody-%d-%t-%s", opts.Scale, opts.Overlay, uuid)
-
-	data, err := r.GetBytes(cacheKey)
-
-	if err != nil {
-		return err
-	}
-
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(data != nil))
-
-	if data == nil {
-		rawSkin, slim, err := GetPlayerSkin(uuid)
-
-		if err != nil {
-			return err
-		}
-
-		data, err = EncodePNG(skin.RenderBackBody(rawSkin, skin.Options{
-			Overlay: opts.Overlay,
-			Slim:    slim,
-			Scale:   opts.Scale,
-		}))
-
-		if err != nil {
-			return err
-		}
-
-		if err = r.Set(cacheKey, data, conf.Cache.RenderCacheDuration); err != nil {
-			return err
-		}
-	}
-
-	if opts.Download {
-		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
-	}
-
-	return ctx.Type("png").Send(data)
-}
-
-// LeftBodyHandler is the API handler used for the `/body/left/:uuid` route.
-func LeftBodyHandler(ctx *fiber.Ctx) error {
-	opts := ParseQueryParams(ctx, conf.Routes.LeftBody)
-
-	uuid, ok := ParseUUID(ExtractUUID(ctx))
-
-	if !ok {
-		return SendUsernameDeprecation(ctx)
-	}
-
-	cacheKey := fmt.Sprintf("result:leftbody-%d-%t-%s", opts.Scale, opts.Overlay, uuid)
-
-	data, err := r.GetBytes(cacheKey)
-
-	if err != nil {
-		return err
-	}
-
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(data != nil))
-
-	if data == nil {
-		rawSkin, slim, err := GetPlayerSkin(uuid)
-
-		if err != nil {
-			return err
-		}
-
-		data, err = EncodePNG(skin.RenderLeftBody(rawSkin, skin.Options{
-			Overlay: opts.Overlay,
-			Slim:    slim,
-			Scale:   opts.Scale,
-		}))
-
-		if err != nil {
-			return err
-		}
-
-		if err = r.Set(cacheKey, data, conf.Cache.RenderCacheDuration); err != nil {
-			return err
-		}
-	}
-
-	if opts.Download {
-		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
-	}
-
-	return ctx.Type("png").Send(data)
-}
-
-// RightBodyHandler is the API handler used for the `/body/right/:uuid` route.
-func RightBodyHandler(ctx *fiber.Ctx) error {
-	opts := ParseQueryParams(ctx, conf.Routes.RightBody)
-
-	uuid, ok := ParseUUID(ExtractUUID(ctx))
-
-	if !ok {
-		return SendUsernameDeprecation(ctx)
-	}
-
-	cacheKey := fmt.Sprintf("result:rightbody-%d-%t-%s", opts.Scale, opts.Overlay, uuid)
-
-	data, err := r.GetBytes(cacheKey)
-
-	if err != nil {
-		return err
-	}
-
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(data != nil))
-
-	if data == nil {
-		rawSkin, slim, err := GetPlayerSkin(uuid)
-
-		if err != nil {
-			return err
-		}
-
-		data, err = EncodePNG(skin.RenderRightBody(rawSkin, skin.Options{
-			Overlay: opts.Overlay,
-			Slim:    slim,
-			Scale:   opts.Scale,
-		}))
-
-		if err != nil {
-			return err
-		}
-
-		if err = r.Set(cacheKey, data, conf.Cache.RenderCacheDuration); err != nil {
-			return err
-		}
-	}
-
-	if opts.Download {
-		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
-	}
-
-	return ctx.Type("png").Send(data)
-}
-
-// FaceHandler is the API handler used for the `/face/:uuid` route.
-func FaceHandler(ctx *fiber.Ctx) error {
-	opts := ParseQueryParams(ctx, conf.Routes.Face)
-
-	uuid, ok := ParseUUID(ExtractUUID(ctx))
-
-	if !ok {
-		return SendUsernameDeprecation(ctx)
-	}
-
-	cacheKey := fmt.Sprintf("result:face-%d-%t-%s", opts.Scale, opts.Overlay, uuid)
-
-	data, err := r.GetBytes(cacheKey)
-
-	if err != nil {
-		return err
-	}
-
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(data != nil))
-
-	if data == nil {
-		rawSkin, slim, err := GetPlayerSkin(uuid)
-
-		if err != nil {
-			return err
-		}
-
-		data, err = EncodePNG(skin.RenderFace(rawSkin, skin.Options{
-			Overlay: opts.Overlay,
-			Slim:    slim,
-			Scale:   opts.Scale,
-		}))
-
-		if err != nil {
-			return err
-		}
-
-		if err = r.Set(cacheKey, data, conf.Cache.RenderCacheDuration); err != nil {
-			return err
-		}
-	}
-
-	if opts.Download {
-		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
-	}
-
-	return ctx.Type("png").Send(data)
-}
-
-// HeadHandler is the API handler used for the `/head/:uuid` route.
-func HeadHandler(ctx *fiber.Ctx) error {
-	opts := ParseQueryParams(ctx, conf.Routes.Head)
-
-	uuid, ok := ParseUUID(ExtractUUID(ctx))
-
-	if !ok {
-		return SendUsernameDeprecation(ctx)
-	}
-
-	cacheKey := fmt.Sprintf("result:head-%d-%t-%s", opts.Scale, opts.Overlay, uuid)
-
-	data, err := r.GetBytes(cacheKey)
-
-	if err != nil {
-		return err
-	}
-
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(data != nil))
-
-	if data == nil {
-		rawSkin, slim, err := GetPlayerSkin(uuid)
-
-		if err != nil {
-			return err
-		}
-
-		data, err = EncodePNG(skin.RenderHead(rawSkin, skin.Options{
-			Overlay: opts.Overlay,
-			Slim:    slim,
-			Scale:   opts.Scale,
-		}))
-
-		if err != nil {
-			return err
-		}
-
-		if err = r.Set(cacheKey, data, conf.Cache.RenderCacheDuration); err != nil {
-			return err
-		}
-	}
-
-	if opts.Download {
-		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
-	}
-
-	return ctx.Type("png").Send(data)
-}
-
 // SkinHandler is the API handler used for the `/skin/:uuid` route.
 func SkinHandler(ctx *fiber.Ctx) error {
 	opts := ParseQueryParams(ctx, conf.Routes.RawSkin)
@@ -412,7 +70,7 @@ func SkinHandler(ctx *fiber.Ctx) error {
 	uuid, ok := ParseUUID(ctx.Params("uuid"))
 
 	if !ok {
-		return SendUsernameDeprecation(ctx)
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
 	}
 
 	rawSkin, _, err := GetPlayerSkin(uuid)
@@ -434,6 +92,223 @@ func SkinHandler(ctx *fiber.Ctx) error {
 	return ctx.Type("png").Send(data)
 }
 
+// FaceHandler is the API handler used for the `/face/:uuid` route.
+func FaceHandler(ctx *fiber.Ctx) error {
+	opts := ParseQueryParams(ctx, conf.Routes.Face)
+
+	uuid, ok := ParseUUID(ExtractUUID(ctx))
+
+	if !ok {
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
+	}
+
+	rawSkin, isSlim, err := GetPlayerSkin(uuid)
+
+	if err != nil {
+		return err
+	}
+
+	result, cache, err := Render(RenderTypeFace, uuid, rawSkin, isSlim, opts)
+
+	if err != nil {
+		return err
+	}
+
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(cache))
+
+	if opts.Download {
+		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
+	}
+
+	return ctx.Type("png").Send(result)
+}
+
+// HeadHandler is the API handler used for the `/head/:uuid` route.
+func HeadHandler(ctx *fiber.Ctx) error {
+	opts := ParseQueryParams(ctx, conf.Routes.Head)
+
+	uuid, ok := ParseUUID(ExtractUUID(ctx))
+
+	if !ok {
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
+	}
+
+	rawSkin, isSlim, err := GetPlayerSkin(uuid)
+
+	if err != nil {
+		return err
+	}
+
+	result, cache, err := Render(RenderTypeHead, uuid, rawSkin, isSlim, opts)
+
+	if err != nil {
+		return err
+	}
+
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(cache))
+
+	if opts.Download {
+		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
+	}
+
+	return ctx.Type("png").Send(result)
+}
+
+// FullBodyHandler is the API handler used for the `/body/full/:uuid` route.
+func FullBodyHandler(ctx *fiber.Ctx) error {
+	opts := ParseQueryParams(ctx, conf.Routes.FullBody)
+
+	uuid, ok := ParseUUID(ExtractUUID(ctx))
+
+	if !ok {
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
+	}
+
+	rawSkin, isSlim, err := GetPlayerSkin(uuid)
+
+	if err != nil {
+		return err
+	}
+
+	result, cache, err := Render(RenderTypeFullBody, uuid, rawSkin, isSlim, opts)
+
+	if err != nil {
+		return err
+	}
+
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(cache))
+
+	if opts.Download {
+		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
+	}
+
+	return ctx.Type("png").Send(result)
+}
+
+// FrontBodyHandler is the API handler used for the `/body/front/:uuid` route.
+func FrontBodyHandler(ctx *fiber.Ctx) error {
+	opts := ParseQueryParams(ctx, conf.Routes.FrontBody)
+
+	uuid, ok := ParseUUID(ExtractUUID(ctx))
+
+	if !ok {
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
+	}
+
+	rawSkin, isSlim, err := GetPlayerSkin(uuid)
+
+	if err != nil {
+		return err
+	}
+
+	result, cache, err := Render(RenderTypeFrontBody, uuid, rawSkin, isSlim, opts)
+
+	if err != nil {
+		return err
+	}
+
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(cache))
+
+	if opts.Download {
+		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
+	}
+
+	return ctx.Type("png").Send(result)
+}
+
+// BackBodyHandler is the API handler used for the `/body/back/:uuid` route.
+func BackBodyHandler(ctx *fiber.Ctx) error {
+	opts := ParseQueryParams(ctx, conf.Routes.BackBody)
+
+	uuid, ok := ParseUUID(ExtractUUID(ctx))
+
+	if !ok {
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
+	}
+
+	rawSkin, isSlim, err := GetPlayerSkin(uuid)
+
+	if err != nil {
+		return err
+	}
+
+	result, cache, err := Render(RenderTypeBackBody, uuid, rawSkin, isSlim, opts)
+
+	if err != nil {
+		return err
+	}
+
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(cache))
+
+	if opts.Download {
+		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
+	}
+
+	return ctx.Type("png").Send(result)
+}
+
+// LeftBodyHandler is the API handler used for the `/body/left/:uuid` route.
+func LeftBodyHandler(ctx *fiber.Ctx) error {
+	opts := ParseQueryParams(ctx, conf.Routes.LeftBody)
+
+	uuid, ok := ParseUUID(ExtractUUID(ctx))
+
+	if !ok {
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
+	}
+
+	rawSkin, isSlim, err := GetPlayerSkin(uuid)
+
+	if err != nil {
+		return err
+	}
+
+	result, cache, err := Render(RenderTypeLeftBody, uuid, rawSkin, isSlim, opts)
+
+	if err != nil {
+		return err
+	}
+
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(cache))
+
+	if opts.Download {
+		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
+	}
+
+	return ctx.Type("png").Send(result)
+}
+
+// RightBodyHandler is the API handler used for the `/body/right/:uuid` route.
+func RightBodyHandler(ctx *fiber.Ctx) error {
+	opts := ParseQueryParams(ctx, conf.Routes.RightBody)
+
+	uuid, ok := ParseUUID(ExtractUUID(ctx))
+
+	if !ok {
+		return ctx.Status(http.StatusBadRequest).SendString("Invalid UUID")
+	}
+
+	rawSkin, isSlim, err := GetPlayerSkin(uuid)
+
+	if err != nil {
+		return err
+	}
+
+	result, cache, err := Render(RenderTypeRightBody, uuid, rawSkin, isSlim, opts)
+
+	if err != nil {
+		return err
+	}
+
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(cache))
+
+	if opts.Download {
+		ctx.Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.png"`, uuid))
+	}
+
+	return ctx.Type("png").Send(result)
+}
+
 // NotFoundHandler is the API handler used for any requests that do not match an existing route.
 func NotFoundHandler(ctx *fiber.Ctx) error {
 	return ctx.SendStatus(http.StatusNotFound)

src/server.go

@@ -1,14 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"log"
-)
-
-func ListenAndServe(host string, port uint16) {
-	log.Printf("Listening on %s:%d\n", host, port)
-
-	if err := app.Listen(fmt.Sprintf("%s:%d", host, port)); err != nil {
-		panic(err)
-	}
-}

src/util.go

@@ -20,6 +20,14 @@ import (
 var (
 	//go:embed favicon.ico
 	favicon []byte
+
+	RenderTypeFullBody  = "fullbody"
+	RenderTypeFrontBody = "frontbody"
+	RenderTypeBackBody  = "backbody"
+	RenderTypeLeftBody  = "leftbody"
+	RenderTypeRightBody = "rightbody"
+	RenderTypeFace      = "face"
+	RenderTypeHead      = "head"
 )
 
 // QueryParams is used by most all API routes as options for how the image should be rendered, or how errors should be handled.
@@ -27,6 +35,119 @@ type QueryParams struct {
 	Scale    int  `query:"scale"`
 	Download bool `query:"download"`
 	Overlay  bool `query:"overlay"`
+	Fallback bool `query:"fallback"`
+}
+
+// PointerOf returns the value of the first argument as a pointer.
+func PointerOf[T any](v T) *T {
+	return &v
+}
+
+// Render will render the image using the specified details and return the result.
+func Render(renderType, uuid string, rawSkin *image.NRGBA, isSlim bool, opts *QueryParams) ([]byte, bool, error) {
+	cache, err := GetCachedRenderResult(renderType, uuid, opts)
+
+	if err != nil {
+		return nil, false, err
+	}
+
+	if cache != nil {
+		if conf.Environment == "development" {
+			log.Printf("Retrieved render from cache (type=%s, uuid=%s, slim=%v, scale=%d)\n", renderType, uuid, isSlim, opts.Scale)
+		}
+
+		return cache, true, nil
+	}
+
+	var (
+		result     *image.NRGBA
+		renderOpts skin.Options = skin.Options{
+			Overlay: opts.Overlay,
+			Slim:    isSlim,
+			Scale:   opts.Scale,
+		}
+	)
+
+	switch renderType {
+	case RenderTypeFullBody:
+		{
+			result = skin.RenderBody(rawSkin, renderOpts)
+
+			break
+		}
+	case RenderTypeFrontBody:
+		{
+			result = skin.RenderFrontBody(rawSkin, renderOpts)
+
+			break
+		}
+	case RenderTypeBackBody:
+		{
+			result = skin.RenderBackBody(rawSkin, renderOpts)
+
+			break
+		}
+	case RenderTypeLeftBody:
+		{
+			result = skin.RenderLeftBody(rawSkin, renderOpts)
+
+			break
+		}
+	case RenderTypeRightBody:
+		{
+			result = skin.RenderRightBody(rawSkin, renderOpts)
+
+			break
+		}
+	case RenderTypeHead:
+		{
+			result = skin.RenderHead(rawSkin, renderOpts)
+
+			break
+		}
+	case RenderTypeFace:
+		{
+			result = skin.RenderFace(rawSkin, renderOpts)
+
+			break
+		}
+	default:
+		panic(fmt.Errorf("unknown render type: %s", renderType))
+	}
+
+	data, err := EncodePNG(result)
+
+	if err != nil {
+		return nil, false, err
+	}
+
+	if err = SetCachedRenderResult(renderType, uuid, opts, data); err != nil {
+		return nil, false, err
+	}
+
+	if conf.Environment == "development" {
+		log.Printf("Rendered image (type=%s, uuid=%s, slim=%v, scale=%d)\n", renderType, uuid, isSlim, opts.Scale)
+	}
+
+	return data, false, nil
+}
+
+// GetCachedRenderResult returns the render result from Redis cache, or nil if it does not exist or cache is disabled.
+func GetCachedRenderResult(renderType, uuid string, opts *QueryParams) ([]byte, error) {
+	if conf.Cache.RenderCacheDuration == nil {
+		return nil, nil
+	}
+
+	return r.GetBytes(fmt.Sprintf("result:%s-%d-%t-%s", renderType, opts.Scale, opts.Overlay, uuid))
+}
+
+// SetCachedRenderResult puts the render result into cache, or does nothing is cache is disabled.
+func SetCachedRenderResult(renderType, uuid string, opts *QueryParams, data []byte) error {
+	if conf.Cache.RenderCacheDuration == nil {
+		return nil
+	}
+
+	return r.Set(fmt.Sprintf("result:%s-%d-%t-%s", renderType, opts.Scale, opts.Overlay, uuid), data, *conf.Cache.RenderCacheDuration)
 }
 
 // FormatUUID returns the UUID string without any dashes.
@@ -74,6 +195,7 @@ func FetchImage(url string) (*image.NRGBA, error) {
 
 // GetPlayerSkin fetches the skin of the Minecraft player by the UUID.
 func GetPlayerSkin(uuid string) (*image.NRGBA, bool, error) {
+	if conf.Cache.SkinCacheDuration != nil {
 		cache, ok, err := r.GetNRGBA(fmt.Sprintf("skin:%s", uuid))
 
 		if err != nil {
@@ -87,19 +209,24 @@ func GetPlayerSkin(uuid string) (*image.NRGBA, bool, error) {
 				return nil, false, err
 			}
 
+			if conf.Environment == "development" {
+				log.Printf("Retrieved player skin from cache (uuid=%s, slim=%v)\n", uuid, slim)
+			}
+
 			return cache, slim, nil
 		}
+	}
+
+	isSlimFromUUID := skin.IsSlimFromUUID(uuid)
 
 	textures, err := GetProfileTextures(uuid)
 
 	if err != nil {
-		return nil, false, err
+		return skin.GetDefaultSkin(isSlimFromUUID), true, nil
 	}
 
 	if textures == nil {
-		slim := skin.IsSlimFromUUID(uuid)
+		return skin.GetDefaultSkin(isSlimFromUUID), isSlimFromUUID, nil
-
-		return skin.GetDefaultSkin(slim), slim, nil
 	}
 
 	if err = r.Set(fmt.Sprintf("unique:%s", textures.UUID), "0", 0); err != nil {
@@ -117,9 +244,7 @@ func GetPlayerSkin(uuid string) (*image.NRGBA, bool, error) {
 	}
 
 	if len(value) < 1 {
-		slim := skin.IsSlimFromUUID(uuid)
+		return skin.GetDefaultSkin(isSlimFromUUID), isSlimFromUUID, nil
-
-		return skin.GetDefaultSkin(slim), slim, nil
 	}
 
 	texturesResult, err := GetDecodedTexturesValue(value)
@@ -129,9 +254,7 @@ func GetPlayerSkin(uuid string) (*image.NRGBA, bool, error) {
 	}
 
 	if len(texturesResult.Textures.Skin.URL) < 1 {
-		slim := skin.IsSlimFromUUID(uuid)
+		return skin.GetDefaultSkin(isSlimFromUUID), isSlimFromUUID, nil
-
-		return skin.GetDefaultSkin(slim), slim, nil
 	}
 
 	slim := texturesResult.Textures.Skin.Metadata.Model == "slim"
@@ -148,12 +271,13 @@ func GetPlayerSkin(uuid string) (*image.NRGBA, bool, error) {
 		return nil, false, err
 	}
 
-	if err = r.Set(fmt.Sprintf("skin:%s", uuid), encodedSkin, conf.Cache.SkinCacheDuration); err != nil {
+	if conf.Cache.SkinCacheDuration != nil {
+		if err = r.Set(fmt.Sprintf("skin:%s", uuid), encodedSkin, *conf.Cache.SkinCacheDuration); err != nil {
 			return nil, false, err
 		}
 
 		if slim {
-		if err = r.Set(fmt.Sprintf("slim:%s", uuid), "true", conf.Cache.SkinCacheDuration); err != nil {
+			if err = r.Set(fmt.Sprintf("slim:%s", uuid), "true", *conf.Cache.SkinCacheDuration); err != nil {
 				return nil, false, err
 			}
 		} else {
@@ -161,13 +285,18 @@ func GetPlayerSkin(uuid string) (*image.NRGBA, bool, error) {
 				return nil, false, err
 			}
 		}
+	}
+
+	if conf.Environment == "development" {
+		log.Printf("Fetched player skin from Mojang (uuid=%s, slim=%v)\n", uuid, slim)
+	}
 
 	return skin, slim, nil
 }
 
 // Clamp clamps the input value between the minimum and maximum values.
 // This method is preferred over `math.Min()` and `math.Max()` to prevent any type coercion between floats and integers.
-func Clamp(value, min, max int) int {
+func Clamp[T int | uint | int8 | uint8 | int16 | uint16 | int32 | uint32 | int64 | uint64](value, min, max T) T {
 	if value > max {
 		return max
 	}
@@ -236,8 +365,3 @@ func GetInstanceID() (uint16, error) {
 func ExtractUUID(ctx *fiber.Ctx) string {
 	return strings.Split(ctx.Params("uuid"), ".")[0]
 }
-
-// SendUsernameDeprecation sends a deprecation warning about usernames.
-func SendUsernameDeprecation(ctx *fiber.Ctx) error {
-	return ctx.Status(http.StatusBadRequest).SendString("Deprecated: Username support has been deprecated since 23 April 2023, please use a valid UUID instead.")
-}