shadow1ng/fscan · error

webscan_unsupported_proxy_type

webscan_unsupported_proxy_type

Error message

webscan_unsupported_proxy_type: %s

What it means

Guard in configureHTTPProxy: after shortcut expansion and normalization the proxy URL uses neither the socks5://, http://, nor https:// scheme. The configured proxy type is unsupported, so web-scan proxying cannot be set up and the offending URL is echoed in the error.

Source

Thrown at webscan/lib/Client.go:118

	httpProxyURL := networkConfig.HTTPProxy
	if httpProxyURL == "" && legacyProxy != "" {
		// 兼容旧参数DownProxy
		httpProxyURL = legacyProxy
	}

	if httpProxyURL != "" {
		// 处理快捷代理配置
		if httpProxyURL == ProxyShortcutBurp {
			httpProxyURL = ProxyBurpURL
		} else if httpProxyURL == ProxyShortcutSocks5 {
			httpProxyURL = ProxySocks5URL
		} else if !strings.Contains(httpProxyURL, "://") {
			httpProxyURL = normalizeHTTPProxyURL(httpProxyURL)
		}

		// 验证代理类型
		if !strings.HasPrefix(httpProxyURL, "socks5://") && !strings.HasPrefix(httpProxyURL, "http://") && !strings.HasPrefix(httpProxyURL, "https://") {
			return fmt.Errorf("%s: %s", i18n.GetText("webscan_unsupported_proxy_type"), httpProxyURL)
		}

		// 解析代理URL
		parsedURL, err := url.Parse(httpProxyURL)
		if err != nil {
			return fmt.Errorf("%s: %w", i18n.GetText("webscan_proxy_url_parse_failed"), err)
		}
		tr.Proxy = http.ProxyURL(parsedURL)
		return nil
	}

	// 无代理配置
	return nil
}

func normalizeHTTPProxyURL(proxyURL string) string {
	if _, err := strconv.Atoi(proxyURL); err == nil {
		return "http://127.0.0.1:" + proxyURL

View on GitHub (pinned to 95cc12e753)

Solutions

1. Set the proxy scheme explicitly to http://, https://, or socks5://
2. Use the built-in shortcuts for Burp/SOCKS5
3. Remove unsupported schemes such as socks4:// from the config

When it happens

Trigger: Thrown at webscan/lib/Client.go:118 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of shadow1ng/fscan@95cc12e753 (2026-09-06). Data as JSON: /api/errors/c4bb4b384fd71486. Report an issue: GitHub.