static HttpServletRequest createInstance()

in grails-gsp/grails-web-gsp/src/main/groovy/grails/gsp/PageRenderer.groovy [144:308]
147 lines of code
46 McCabe index (conditional complexity)

        static HttpServletRequest createInstance(final String requestURI, Locale localeToUse = Locale.getDefault()) {

            def params = new ConcurrentHashMap()
            def attributes = new ConcurrentHashMap()

            String contentType = null
            String characterEncoding = "UTF-8"

            (HttpServletRequest)Proxy.newProxyInstance(HttpServletRequest.classLoader, [HttpServletRequest] as Class[], new InvocationHandler() {
                Object invoke(proxy, Method method, Object[] args) {

                    String methodName = method.name

                    if (methodName == 'getContentType') {
                        return contentType
                    }
                    if (methodName == 'setContentType') {
                        contentType = args[0]
                        return null
                    }
                    if (methodName == 'getCharacterEncoding') {
                        return characterEncoding
                    }
                    if (methodName == 'setCharacterEncoding') {
                        characterEncoding = args[0]
                    }

                    if (methodName == 'getRealPath') {
                        return requestURI
                    }
                    if (methodName == 'getLocalName') {
                        return "localhost"
                    }
                    if (methodName == 'getLocalAddr') {
                        return "127.0.0.1"
                    }
                    if (methodName == 'getLocalPort') {
                        return 80
                    }

                    if (methodName == 'getCookies') {
                        return ([] as Cookie[])
                    }
                    if (methodName == 'getDateHeader' || methodName == 'getIntHeader') {
                        return -1
                    }
                    if (methodName == 'getMethod') {
                        return 'GET'
                    }
                    if (methodName == 'getContextPath' || methodName == 'getServletPath') {
                        return '/'
                    }

                    if (methodName in ['getPathInfo', 'getPathTranslated', 'getQueryString']) {
                        return ''
                    }

                    if (methodName == 'getRequestURL') {
                        return new StringBuffer(requestURI)
                    }
                    if (methodName == 'getRequestURI') {
                        return requestURI
                    }

                    if (methodName == 'isRequestedSessionIdValid') {
                        return true
                    }
                    if (methodName in [
                        'isRequestedSessionIdFromCookie', 'isRequestedSessionIdFromURL', 'isRequestedSessionIdFromUrl',
                        'authenticate', 'isUserInRole', 'isSecure', 'isAsyncStarted', 'isAsyncSupported']) {
                        return false
                    }

                    if (methodName == 'getSession') {
                        throw new UnsupportedOperationException("You cannot use the session in non-request rendering operations")
                    }
                    if (methodName == 'getInputStream') {
                        throw new UnsupportedOperationException("You cannot read the input stream in non-request rendering operations")
                    }
                    if (methodName == 'getProtocol') {
                        throw new UnsupportedOperationException("You cannot read the protocol in non-request rendering operations")
                    }
                    if (methodName == 'getScheme') {
                        throw new UnsupportedOperationException("You cannot read the scheme in non-request rendering operations")
                    }
                    if (methodName == 'getServerName') {
                        throw new UnsupportedOperationException("You cannot read server name in non-request rendering operations")
                    }
                    if (methodName == 'getServerPort') {
                        throw new UnsupportedOperationException("You cannot read the server port in non-request rendering operations")
                    }
                    if (methodName == 'getReader') {
                        throw new UnsupportedOperationException("You cannot read input in non-request rendering operations")
                    }
                    if (methodName == 'getRemoteAddr') {
                        throw new UnsupportedOperationException("You cannot read the remote address in non-request rendering operations")
                    }
                    if (methodName == 'getRemoteHost') {
                        throw new UnsupportedOperationException("You cannot read the remote host in non-request rendering operations")
                    }
                    if (methodName == 'getRequestDispatcher') {
                        throw new UnsupportedOperationException("You cannot use the request dispatcher in non-request rendering operations")
                    }
                    if (methodName == 'getRemotePort') {
                        throw new UnsupportedOperationException("You cannot read the remote port in non-request rendering operations")
                    }

                    if (methodName == 'getParts') {
                        return []
                    }

                    if (methodName == 'getAttribute') {
                        return attributes[args[0]]
                    }
                    if (methodName == 'getAttributeNames') {
                        return attributes.keys()
                    }
                    if (methodName == 'setAttribute') {
                        String name = args[0]
                        Object o = args[1]
                        if (o == null) {
                            attributes.remove name
                        } else {
                            attributes[name] = o
                        }
                        return null
                    }
                    if (methodName == 'removeAttribute') {
                        attributes.remove args[0]
                        return null
                    }

                    if (methodName == 'getLocale') {
                        return localeToUse
                    }
                    if (methodName == 'getLocales') {
                        def iterator = [localeToUse].iterator()
                        PageRenderRequestCreator.iteratorAsEnumeration(iterator)
                    }

                    if (methodName == 'getParameter') {
                        return params[args[0]]
                    }
                    if (methodName == 'getParameterNames') {
                        return params.keys()
                    }
                    if (methodName == 'getParameterValues') {
                        return [] as String[]
                    }
                    if (methodName == 'getParameterMap') {
                        return params
                    }

                    if (methodName == 'getContentLength') {
                        return 0
                    }

                    if ('getHeaderNames'.equals(methodName) || 'getHeaders'.equals(methodName)) {
                        return Collections.enumeration(Collections.emptySet())
                    }

                    return null
                }
            })
        }