Ruby: compress TRAP using Brotli

ruby/extractor/Cargo.toml

@@ -18,4 +18,5 @@ tracing-subscriber = { version = "0.3.3", features = ["env-filter"] }
 rayon = "1.5.0"
 num_cpus = "1.13.0"
 regex = "1.4.3"
-indexmap = "1.7.0"
+indexmap = "1.7.0"
+brotli = "3.3.3"

ruby/extractor/src/trap.rs

@@ -95,6 +95,14 @@ impl Writer {
                 let mut compressed_writer = GzEncoder::new(trap_file, flate2::Compression::fast());
                 self.write(&mut compressed_writer)
             }
+            Compression::Brotli => {
+                let mut params = brotli::enc::BrotliEncoderParams::default();
+                params.quality = 3;
+                let params = params;
+                let mut compressed_writer =
+                    brotli::CompressorWriter::with_params(trap_file, 4096, &params);
+                self.write(&mut compressed_writer)
+            }
         }
     }
 }
@@ -193,6 +201,7 @@ fn limit_string(string: &str, max_size: usize) -> &str {
 pub enum Compression {
     None,
     Gzip,
+    Brotli,
 }
 
 impl Compression {
@@ -201,12 +210,12 @@ impl Compression {
             Ok(method) => match Compression::from_string(&method) {
                 Some(c) => c,
                 None => {
-                    tracing::error!("Unknown compression method '{}'; using gzip.", &method);
-                    Compression::Gzip
+                    tracing::error!("Unknown compression method '{}'; using Brotli.", &method);
+                    Compression::Brotli
                 }
             },
             // Default compression method if the env var isn't set:
-            Err(_) => Compression::Gzip,
+            Err(_) => Compression::Brotli,
         }
     }
 
@@ -214,6 +223,7 @@ impl Compression {
         match s.to_lowercase().as_ref() {
             "none" => Some(Compression::None),
             "gzip" => Some(Compression::Gzip),
+            "brotli" => Some(Compression::Brotli),
             _ => None,
         }
     }
@@ -222,6 +232,7 @@ impl Compression {
         match self {
             Compression::None => "trap",
             Compression::Gzip => "trap.gz",
+            Compression::Brotli => "trap.br",
         }
     }
 }