[pbs-devel] [PATCH proxmox-backup 1/6] tools: add compression module

[Dominik Csapak <d.csapak@proxmox.com>]

only contains a basic enum for the different compresssion methods

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/tools.rs             |  1 +
 src/tools/compression.rs | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 src/tools/compression.rs

diff --git a/src/tools.rs b/src/tools.rs
index 7e3bff7b..cd1415ec 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -22,6 +22,7 @@ pub mod apt;
 pub mod async_io;
 pub mod borrow;
 pub mod cert;
+pub mod compression;
 pub mod daemon;
 pub mod disks;
 pub mod format;
diff --git a/src/tools/compression.rs b/src/tools/compression.rs
new file mode 100644
index 00000000..fe15e8fc
--- /dev/null
+++ b/src/tools/compression.rs
@@ -0,0 +1,37 @@
+use anyhow::{bail, Error};
+use hyper::header;
+
+/// Possible Compression Methods, order determines preference (later is preferred)
+#[derive(Eq, Ord, PartialEq, PartialOrd, Debug)]
+pub enum CompressionMethod {
+    Deflate,
+    Gzip,
+    Brotli,
+}
+
+impl CompressionMethod {
+    pub fn content_encoding(&self) -> header::HeaderValue {
+        header::HeaderValue::from_static(self.extension())
+    }
+
+    pub fn extension(&self) -> &'static str {
+        match *self {
+            CompressionMethod::Brotli => "br",
+            CompressionMethod::Gzip => "gzip",
+            CompressionMethod::Deflate => "deflate",
+        }
+    }
+}
+
+impl std::str::FromStr for CompressionMethod {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "br" => Ok(CompressionMethod::Brotli),
+            "gzip" => Ok(CompressionMethod::Brotli),
+            "deflate" => Ok(CompressionMethod::Deflate),
+            _ => bail!("unknown compression format"),
+        }
+    }
+}
-- 
2.20.1