Refactor: replace Viper with Koanf

README.md

@@ -6,7 +6,7 @@
 
 HellPot is an endless honeypot based on [Heffalump](https://github.com/carlmjohnson/heffalump) that sends unruly HTTP bots to hell.
 
-Notably it implements a [toml configuration file](https://github.com/spf13/viper), has [JSON logging](https://github.com/rs/zerolog), and comes with significant performance gains.
+Notably it implements a [toml configuration file](https://github.com/knadh/koanf), has [JSON logging](https://github.com/rs/zerolog), and comes with significant performance gains.
 
 ![Exploding Heffalump](https://tcp.ac/i/H8O9M.gif)
 
@@ -60,6 +60,15 @@ In the event of a missing configuration file, HellPot will attempt to place it's
 
 ## Configuration Reference
 
+
+> [!TIP]
+> Configuration values can be overridden with environment variables prefixed with `HELLPOT_`.
+> When using this method, replace underscores in configuration keys with two underscores.
+>
+> e.g:
+> to set `http.bind_addr` via env, set `HELLPOT_HTTP_BIND__ADDR="x.x.x.x"`
+
+
 ```toml
 [deception]
   # Used as "Server" HTTP header. Note that reverse proxies may hide this.
@@ -108,7 +117,12 @@ In the event of a missing configuration file, HellPot will attempt to place it's
   restrict_concurrency = false
 ```
 
-## Example Web Server Config (nginx)
+### Example Reverse Proxy Configs
+
+#### nginx
+
+<details>
+  <summary>nginx</summary>
 
 ```nginx
 location '/robots.txt' {
@@ -124,7 +138,12 @@ location '/wp-login.php' {
 }
 ```
 
-## Example Web Server Config (apache)
+</details>
+
+#### Apache
+
+<details>
+  <summary>apache (mod_proxy + mod_proxy_http)</summary>
 
 All nonexisting URLs are being reverse proxied to a HellPot instance on localhost, which is set to catchall. Traffic served by HellPot is rate limited to 5 KiB/s.
 
@@ -161,6 +180,8 @@ All nonexisting URLs are being reverse proxied to a HellPot instance on localhos
 </VirtualHost>
 ```
 
+</details>
+
 ## Related Suffering
 
 - https://github.com/ginger51011/pandoras_pot

go.mod

@@ -5,36 +5,29 @@ go 1.19
 require (
 	git.tcp.direct/kayos/common v0.9.7
 	github.com/fasthttp/router v1.5.1
+	github.com/knadh/koanf/parsers/toml v0.1.0
+	github.com/knadh/koanf/providers/env v0.1.0
+	github.com/knadh/koanf/providers/file v0.1.0
+	github.com/knadh/koanf/v2 v2.1.1
 	github.com/rs/zerolog v1.33.0
 	github.com/spf13/afero v1.11.0
-	github.com/spf13/viper v1.19.0
 	github.com/valyala/fasthttp v1.55.0
 	golang.org/x/term v0.21.0
 )
 
 require (
 	github.com/andybalholm/brotli v1.1.0 // indirect
-	github.com/fsnotify/fsnotify v1.7.0 // indirect
-	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.0.0-alpha.1 // indirect
 	github.com/klauspost/compress v1.17.9 // indirect
-	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/knadh/koanf/maps v0.1.1 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
-	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
-	github.com/sagikazarmark/locafero v0.4.0 // indirect
-	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/savsgio/gotils v0.0.0-20240303185622-093b76447511 // indirect
-	github.com/sourcegraph/conc v0.3.0 // indirect
-	github.com/spf13/cast v1.6.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
-	go.uber.org/atomic v1.9.0 // indirect
-	go.uber.org/multierr v1.9.0 // indirect
-	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
 	golang.org/x/sys v0.21.0 // indirect
 	golang.org/x/text v0.16.0 // indirect
-	gopkg.in/ini.v1 v1.67.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -3,79 +3,53 @@ git.tcp.direct/kayos/common v0.9.7/go.mod h1:mmTOIi7k99yygTa1FSOZNoFEEbSTOQV/QpT
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@@ -84,11 +58,5 @@ golang.org/x/term v0.21.0 h1:WVXCp+/EBEHOj53Rvu+7KiT/iElMrO8ACK16SMZ3jaA=
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