From d8849143386d1e095cadd212644306c98509b6ca Mon Sep 17 00:00:00 2001
From: Milky0217 <m943790568@163.com>
Date: Thu, 7 May 2026 15:37:51 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E6=94=AF=E4=BB=98=E5=AE=9D=E8=A1=A8?=
 =?UTF-8?q?=E5=8D=95=E4=BD=BF=E7=94=A8=E5=8E=9F=E5=A7=8B=E5=80=BC=EF=BC=8C?=
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 =?UTF-8?q?URL=E7=BC=96=E7=A0=81?=
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修复 double-encoding 问题：表单 hidden input 不应预先 URL 编码，
浏览器提交时会自动编码，预编码会导致二次编码（如空格变 %2520）
---
 src/handlers/payment.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/handlers/payment.rs b/src/handlers/payment.rs
index d142ced..a21dd0d 100644
--- a/src/handlers/payment.rs
+++ b/src/handlers/payment.rs
@@ -170,18 +170,17 @@ fn build_alipay_form_html(
 
     let sign = rsa2_sign(&sign_source, &config.private_key)?;
 
-    // 生成自动提交的表单 HTML
+    // 生成自动提交的表单 HTML（使用原始值，浏览器会自动 URL 编码）
     let mut form_fields = String::new();
     for (k, v) in &params {
         form_fields.push_str(&format!(
             r#"<input type="hidden" name="{}" value="{}" />"#,
-            urlencoding(k),
-            urlencoding(v)
+            k, v
         ));
     }
     form_fields.push_str(&format!(
         r#"<input type="hidden" name="sign" value="{}" />"#,
-        urlencoding(&sign)
+        &sign
     ));
 
     let html = format!(