update help doc

doc/xh.1

@@ -1,4 +1,4 @@
-.TH XH 1 2025-01-23 0.23.1 "User Commands"
+.TH XH 1 2025-02-04 0.23.1 "User Commands"
 
 .SH NAME
 xh \- Friendly and fast tool for sending HTTP requests
@@ -191,7 +191,7 @@ Always stream the response body.
 \fB\-x\fR, \fB\-\-compress\fR
 Content compressed (encoded) with Deflate algorithm. The Content\-Encoding header is set to deflate.
 
-Compression is skipped if it appears that compression ratio is negative. Compression can be forced by repeating this option.
+Compression is skipped if it appears that compression ratio is negative. Compression can be forced by repeating this option. Note: Compression cannot be forced if the Content\-Encoding request header is present.
 .TP 4
 \fB\-o\fR, \fB\-\-output\fR=\fIFILE\fR
 Save output to FILE instead of stdout.

src/cli.rs

@@ -187,6 +187,7 @@ Example: --print=Hb"
     ///
     ///  Compression is skipped if it appears that compression ratio is negative.
     ///  Compression can be forced by repeating this option.
+    ///  Note: Compression cannot be forced if the Content-Encoding request header is present.
     #[clap(short = 'x', long = "compress", name = "compress", action = ArgAction::Count)]
     pub compress: u8,
 

src/main.rs

@@ -512,6 +512,7 @@ fn run(args: Cli) -> Result<i32> {
 
         if args.compress >= 1 && request.headers().get(CONTENT_ENCODING).is_none() {
             if let Some(body) = request.body_mut() {
+                // TODO: Compress file body (Multipart and File) without buffering
                 let body_bytes = body.buffer()?;
                 let mut encoder = ZlibEncoder::new(Vec::new(), Default::default());
                 encoder.write_all(body_bytes)?;