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internal/cursor/proxy_settings.go

@@ -0,0 +1,158 @@
+package cursor
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sync"
+
+	"cursor/internal/appdata"
+	"cursor/internal/securefile"
+)
+
+var proxySettingsMu sync.Mutex
+
+type proxySettingsBackup struct {
+	Original map[string]json.RawMessage `json:"original"`
+	Applied  map[string]json.RawMessage `json:"applied"`
+}
+
+func settingsBackupPath() string {
+	return filepath.Join(appdata.DataRootPath(), "proxy-settings-backup.json")
+}
+func rawEqual(a, b json.RawMessage) bool {
+	var x, y bytes.Buffer
+	if json.Compact(&x, a) != nil || json.Compact(&y, b) != nil {
+		return len(a) == 0 && len(b) == 0
+	}
+	return bytes.Equal(x.Bytes(), y.Bytes())
+}
+func loadSettings(path string) (map[string]json.RawMessage, error) {
+	data, err := os.ReadFile(path)
+	if errors.Is(err, os.ErrNotExist) {
+		return map[string]json.RawMessage{}, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	data, err = normalizeJSONC(data)
+	if err != nil {
+		return nil, err
+	}
+	if len(bytes.TrimSpace(data)) == 0 {
+		return map[string]json.RawMessage{}, nil
+	}
+	var settings map[string]json.RawMessage
+	if err = json.Unmarshal(data, &settings); err != nil {
+		return nil, err
+	}
+	if settings == nil {
+		return nil, fmt.Errorf("Cursor 配置必须是 JSON 对象")
+	}
+	return settings, nil
+}
+func readSettingsBackup() (proxySettingsBackup, error) {
+	backup := proxySettingsBackup{Original: map[string]json.RawMessage{}, Applied: map[string]json.RawMessage{}}
+	data, err := os.ReadFile(settingsBackupPath())
+	if errors.Is(err, os.ErrNotExist) {
+		return backup, nil
+	}
+	if err != nil {
+		return backup, err
+	}
+	err = json.Unmarshal(data, &backup)
+	if err == nil && (backup.Original == nil || backup.Applied == nil) {
+		err = fmt.Errorf("代理配置备份损坏")
+	}
+	return backup, err
+}
+
+func WriteUserProxySettings(proxyURL string) error {
+	if proxyURL == "" {
+		return fmt.Errorf("代理地址为空")
+	}
+	proxySettingsMu.Lock()
+	defer proxySettingsMu.Unlock()
+	path, err := resolveCursorSettingsPath()
+	if err != nil {
+		return err
+	}
+	settings, err := loadSettings(path)
+	if err != nil {
+		return fmt.Errorf("解析 Cursor 配置失败，原文件已保留: %w", err)
+	}
+	backup, err := readSettingsBackup()
+	if err != nil {
+		return err
+	}
+	values := map[string]any{"http.proxy": proxyURL, "http.proxyKerberosServicePrincipal": proxyURL, "http.proxySupport": "on", "cursor.general.disableHttp2": true, "http.experimental.systemCertificatesV2": true}
+	for key, value := range values {
+		if previous, exists := settings[key]; exists {
+			if !rawEqual(previous, backup.Applied[key]) {
+				backup.Original[key] = append(json.RawMessage(nil), previous...)
+			}
+		} else {
+			delete(backup.Original, key)
+		}
+		encoded, _ := json.Marshal(value)
+		backup.Applied[key] = encoded
+		settings[key] = encoded
+	}
+	backupData, err := json.Marshal(backup)
+	if err != nil {
+		return err
+	}
+	if err = securefile.Write(settingsBackupPath(), backupData); err != nil {
+		return err
+	}
+	// Preserve the product's intentional permanent auto-update setting.
+	settings["update.mode"] = json.RawMessage(`"none"`)
+	data, err := json.MarshalIndent(settings, "", "  ")
+	if err != nil {
+		return err
+	}
+	return securefile.Write(path, append(data, '\n'))
+}
+
+func ClearUserProxySettings() error {
+	proxySettingsMu.Lock()
+	defer proxySettingsMu.Unlock()
+	path, err := resolveCursorSettingsPath()
+	if err != nil {
+		return err
+	}
+	backup, err := readSettingsBackup()
+	if err != nil {
+		return err
+	}
+	if len(backup.Applied) == 0 {
+		return nil
+	} // No ownership proof: preserve user values.
+	settings, err := loadSettings(path)
+	if err != nil {
+		return fmt.Errorf("解析 Cursor 配置失败，原文件已保留: %w", err)
+	}
+	for key, applied := range backup.Applied {
+		if rawEqual(settings[key], applied) {
+			if previous, exists := backup.Original[key]; exists {
+				settings[key] = previous
+			} else {
+				delete(settings, key)
+			}
+		}
+	}
+	data, err := json.MarshalIndent(settings, "", "  ")
+	if err != nil {
+		return err
+	}
+	if err = securefile.Write(path, append(data, '\n')); err != nil {
+		return err
+	}
+	if err = os.Remove(settingsBackupPath()); err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	return nil
+}