From 447cb2eee535c085ae6c02d8c01b4f7b3f6c3916 Mon Sep 17 00:00:00 2001
From: xiaoski <xiaoski@qq.com>
Date: Fri, 24 Apr 2026 16:25:52 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=9D=E5=AD=98=E5=9B=BE=E7=89=87=E6=8C=89?=
 =?UTF-8?q?=E5=AE=9E=E9=99=85=E6=A0=BC=E5=BC=8F=E5=82=A8=E5=AD=98=E3=80=82?=
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---
 src/channels/feishu.rs | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/channels/feishu.rs b/src/channels/feishu.rs
index ed6c4a2..651d7a5 100644
--- a/src/channels/feishu.rs
+++ b/src/channels/feishu.rs
@@ -356,14 +356,28 @@ impl FeishuChannel {
             return Err(ChannelError::Other(format!("Image download failed {}: {}", status, error_text)));
         }
 
+        let content_type = resp
+            .headers()
+            .get("content-type")
+            .and_then(|v| v.to_str().ok())
+            .unwrap_or("image/jpeg");
+
+        let ext = match content_type {
+            "image/png" => "png",
+            "image/gif" => "gif",
+            "image/webp" => "webp",
+            "image/bmp" => "bmp",
+            _ => "jpg",
+        };
+
         let data = resp.bytes().await
             .map_err(|e| ChannelError::Other(format!("Failed to read image data: {}", e)))?
             .to_vec();
 
         #[cfg(debug_assertions)]
-        tracing::debug!(data_len = %data.len(), "Downloaded image data");
+        tracing::debug!(data_len = %data.len(), content_type = %content_type, "Downloaded image data");
 
-        let filename = format!("{}_{}.jpg", message_id, &image_key[..8.min(image_key.len())]);
+        let filename = format!("{}_{}.{}", message_id, &image_key[..8.min(image_key.len())], ext);
         let file_path = media_dir.join(&filename);
 
         tokio::fs::write(&file_path, &data).await