Updated the Readme with compression_config

config/confighttp/README.md

@@ -26,6 +26,31 @@ README](../configtls/README.md).
 - `compression`: Compression type to use among `gzip`, `zstd`, `snappy`, `zlib`, `deflate`, and `lz4`.
   - look at the documentation for the server-side of the communication.
   - `none` will be treated as uncompressed, and any other inputs will cause an error.
+- `compression_config` : Configure advanced compression options
+  - `level`: Configure compression level for `compression` type
+  - The following are valid combinations of `compression` and `level`
+    - `gzip`
+      - NoCompression: `0`
+      - BestSpeed: `1`
+      - BestCompression: `9`
+      - DefaultCompression: `-1`
+    - `zlib`
+      - NoCompression: `0`
+      - BestSpeed: `1`
+      - BestCompression: `9`
+      - DefaultCompression: `-1`
+    - `deflate`
+      - NoCompression: `0`
+      - BestSpeed: `1`
+      - BestCompression: `9`
+      - DefaultCompression: `-1`
+    - `zstd`
+      - SpeedFastest: `1`
+      - SpeedDefault: `3`
+      - SpeedBetterCompression: `6`
+      - SpeedBestCompression: `11`
+    - `snappy`
+      No compression levels supported yet
 - [`max_idle_conns`](https://golang.org/pkg/net/http/#Transport)
 - [`max_idle_conns_per_host`](https://golang.org/pkg/net/http/#Transport)
 - [`max_conns_per_host`](https://golang.org/pkg/net/http/#Transport)

config/confighttp/compression_test.go

@@ -119,15 +119,16 @@ func TestHTTPClientCompression(t *testing.T) {
 
 			req, err := http.NewRequest(http.MethodGet, srv.URL, reqBody)
 			require.NoError(t, err, "failed to create request to test handler")
-			compressionType := configcompression.Type(tt.encoding)
+			compressionType := tt.encoding
+			err = compressionType.UnmarshalText([]byte(tt.encoding))
+			require.NoError(t, err)
 			compression_config := newCompressionConfig(tt.enclevel)
 			err = compression_config.Validate()
 			clientSettings := ClientConfig{
 				Endpoint:          srv.URL,
 				Compression:       tt.encoding,
 				CompressionConfig: newCompressionConfig(tt.enclevel),
 			}
-			compressionType.UnmarshalText([]byte(tt.encoding))
 			if tt.shouldError {
 				assert.Error(t, err)
 				message := fmt.Sprintf("unsupported compression type and level %s - %d", tt.encoding, tt.enclevel)

exporter/otlpexporter/go.mod

@@ -42,7 +42,7 @@ require (
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/hashicorp/go-version v1.7.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/knadh/koanf/maps v0.1.1 // indirect
 	github.com/knadh/koanf/providers/confmap v0.1.0 // indirect
 	github.com/knadh/koanf/v2 v2.1.2 // indirect