Function BaseURL

core/http/middleware/baseurl.go:57–86

BaseURL returns the base URL for the given HTTP request context. It takes into account that the app may be exposed by a reverse-proxy under a different protocol, host and path. The returned URL is guaranteed to end with `/`. The method should be used in conjunction with the StripPathPrefix middlewar

(c echo.Context)

// The returned URL is guaranteed to end with `/`.
// The method should be used in conjunction with the StripPathPrefix middleware.
func BaseURL(c echo.Context) string {
	// An explicit external base URL (LOCALAI_BASE_URL) is authoritative for
	// the origin. The proxy-derived path prefix is still appended so a
	// reverse-proxy mount point keeps working. Trailing slashes are
	// normalized via BasePathPrefix, which always starts and ends with "/".
	if ext, ok := c.Get("_external_base_url").(string); ok && ext != "" {
		return strings.TrimRight(ext, "/") + BasePathPrefix(c)
	}

	fwdProto, fwdHost := parseForwarded(c.Request().Header.Get("Forwarded"))

	scheme := "http"
	switch {
	case c.Request().TLS != nil:
		scheme = "https"
	case strings.EqualFold(firstToken(c.Request().Header.Get("X-Forwarded-Proto")), "https"):
		scheme = "https"
	case strings.EqualFold(fwdProto, "https"):
		scheme = "https"
	}

	host := c.Request().Host
	if forwardedHost := c.Request().Header.Get("X-Forwarded-Host"); forwardedHost != "" {
		host = forwardedHost
	} else if fwdHost != "" {
		host = fwdHost
	}

	return scheme + "://" + host + BasePathPrefix(c)
}

// firstToken returns the first comma-separated token of v, trimmed of spaces.
// Reverse-proxy chains can emit X-Forwarded-Proto as "https,http"; only the