docs: 更新文档

Author: share121

README.md

@@ -43,7 +43,29 @@
   by [share121](https://github.com/share121), [Cyan](https://github.com/CyanChanges), and other contributors.
 - **💻 Cross-Platform**
 
-## Download
+## Quick Install
+
+### Linux & macOS
+
+using curl:
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.sh | bash
+```
+
+Or using wget:
+
+```bash
+wget -qO- https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.sh | bash
+```
+
+### Windows
+
+```powershell
+powershell -ExecutionPolicy ByPass -c "irm https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.ps1 | iex"
+```
+
+## Manual Download
 
 | Architecture | Windows       | Linux         | Mac OS           |
 | ------------ | ------------- | ------------- | ---------------- |

README.zhcn.md

@@ -39,7 +39,29 @@
   所有代码全部公开，由 [share121](https://github.com/share121)、[Cyan](https://github.com/CyanChanges) 与其他贡献者一起维护
 - **💻 跨平台**
 
-## 下载
+## 快速安装
+
+### Linux & macOS
+
+使用 curl:
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.sh | bash
+```
+
+或使用 wget:
+
+```bash
+wget -qO- https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.sh | bash
+```
+
+### Windows
+
+```powershell
+powershell -ExecutionPolicy ByPass -c "irm https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.ps1 | iex"
+```
+
+## 手动下载
 
 | 架构    | Windows   | Linux     | Mac OS    |
 | ------- | --------- | --------- | --------- |

README.zhtw.md

@@ -39,7 +39,29 @@
   所有程式碼完全公開，由 [share121](https://github.com/share121)、[Cyan](https://github.com/CyanChanges) 及其他貢獻者共同維護
 - **💻 跨平台支援**
 
-## 下載
+## 快速安装
+
+### Linux & macOS
+
+使用 curl:
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.sh | bash
+```
+
+或使用 wget:
+
+```bash
+wget -qO- https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.sh | bash
+```
+
+### Windows
+
+```powershell
+powershell -ExecutionPolicy ByPass -c "irm https://raw.githubusercontent.com/fast-down/cli/refs/heads/main/scripts/install.ps1 | iex"
+```
+
+## 手動下載
 
 | 架構    | Windows   | Linux     | Mac OS    |
 | ------- | --------- | --------- | --------- |

scripts/install.sh

@@ -12,7 +12,23 @@ trap 'rm -f "$TMP_FILE"' EXIT INT TERM
 
 echo "✨ Downloading $DOWNLOAD_URL"
 
-if command -v wget >/dev/null 2>&1; then
+if command -v curl >/dev/null 2>&1; then
+    HTTP_STATUS=$(curl -L# --retry 3 --retry-delay 2 -w "%{http_code}" -o "$TMP_FILE" "$DOWNLOAD_URL")
+    CURL_RET=$?
+    if [ $CURL_RET -ne 0 ]; then
+        echo "❌ Error: Curl command failed (Exit Code: $CURL_RET)"
+        exit 1
+    fi
+    if [ "$HTTP_STATUS" != "200" ]; then
+        if [ -s "$TMP_FILE" ]; then
+            SERVER_MSG=$(cat "$TMP_FILE")
+            echo "❌ Error: $SERVER_MSG (Platform: $PLATFORM, Arch: $ARCH, HTTP Status: $HTTP_STATUS)"
+        else
+            echo "❌ Error: Network request failed (Platform: $PLATFORM, Arch: $ARCH, HTTP Status: $HTTP_STATUS)"
+        fi
+        exit 1
+    fi
+elif command -v wget >/dev/null 2>&1; then
     wget -q --show-progress --content-on-error -O "$TMP_FILE" "$DOWNLOAD_URL"
     WGET_STATUS=$?
     if [ $WGET_STATUS -ne 0 ]; then
@@ -24,16 +40,6 @@ if command -v wget >/dev/null 2>&1; then
         fi
         exit 1
     fi
-elif command -v curl >/dev/null 2>&1; then
-    HTTP_STATUS=$(curl -# -L -w "%{http_code}" -o "$TMP_FILE" "$DOWNLOAD_URL" || echo "CURL_ERROR")
-    if [ "$HTTP_STATUS" = "CURL_ERROR" ]; then
-        echo "❌ Error: Network request failed (Platform: $PLATFORM, Arch: $ARCH)"
-        exit 1
-    elif [ "$HTTP_STATUS" != "200" ]; then
-        SERVER_MSG=$(cat "$TMP_FILE")
-        echo "❌ Error: $SERVER_MSG (Platform: $PLATFORM, Arch: $ARCH, HTTP Status: $HTTP_STATUS)"
-        exit 1
-    fi
 else
     echo "❌ Error: Neither 'curl' nor 'wget' is installed"
     echo "🔔 Please install curl or wget first, then run this script again"