Refactor monitoring package: remove platform-specific files and consolidate OS detection and process counting logic

- Deleted os_windows.go and process_windows.go, replacing them with platform-agnostic implementations in unit directory.
- Removed Linux-specific process counting logic from process_linux.go and integrated it into unit.
- Consolidated uptime and OS name retrieval into unit files for better organization.
- Updated update mechanism to use global variables for current version and repository.
- Introduced command-line flags for configuration, including disabling auto-update and web SSH.
- Implemented WebSocket connection handling and terminal interaction for both Unix and Windows systems.
- Added basic info upload functionality to server package, enhancing monitoring capabilities.

monitoring/unit/ip.go

@@ -0,0 +1,80 @@
+package monitoring
+
+import (
+	"io"
+	"net/http"
+	"regexp"
+)
+
+var userAgent = "curl/8.0.1"
+
+func GetIPv4Address() (string, error) {
+	webAPIs := []string{"https://api.bilibili.com/x/web-interface/zone", "https://ip.sb", "https://api.ipify.org?format=json"}
+
+	for _, api := range webAPIs {
+		// get ipv4
+		req, err := http.NewRequest("GET", api, nil)
+		if err != nil {
+			continue
+		}
+		req.Header.Set("User-Agent", userAgent)
+		resp, err := http.DefaultClient.Do(req)
+		if err != nil {
+			continue
+		}
+		defer resp.Body.Close()
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			continue
+		}
+		// 使用正则表达式从响应体中提取IPv4地址
+		re := regexp.MustCompile(`\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}`)
+		ipv4 := re.FindString(string(body))
+		if ipv4 != "" {
+			return ipv4, nil
+		}
+	}
+	return "", nil
+}
+
+func GetIPv6Address() (string, error) {
+	webAPIs := []string{"https://api6.ipify.org?format=json", "https://ipv6.icanhazip.com"}
+
+	for _, api := range webAPIs {
+		// get ipv6
+		req, err := http.NewRequest("GET", api, nil)
+		if err != nil {
+			continue
+		}
+		req.Header.Set("User-Agent", userAgent)
+		resp, err := http.DefaultClient.Do(req)
+		if err != nil {
+			continue
+		}
+		defer resp.Body.Close()
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			continue
+		}
+		// 使用正则表达式从响应体中提取IPv6地址
+		re := regexp.MustCompile(`([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])`)
+		ipv6 := re.FindString(string(body))
+		if ipv6 != "" {
+			return ipv6, nil
+		}
+	}
+	return "", nil
+}
+
+func GetIPAddress() (ipv4, ipv6 string, err error) {
+	ipv4, err = GetIPv4Address()
+	if err != nil {
+		ipv4 = ""
+	}
+	ipv6, err = GetIPv6Address()
+	if err != nil {
+		ipv6 = ""
+	}
+
+	return ipv4, ipv6, nil
+}