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How to use get_proxy_backend_url method in localstack

Best Python code snippet using localstack_python

generic_proxy.py

Source:generic_proxy.py

...482    data = data_bytes483    original_request = RoutingRequest(method=method, path=path, data=data, headers=headers)484    def is_full_url(url):485        return re.match(r"[a-zA-Z]+://.+", url)486    def get_proxy_backend_url(_path, original_url=None, run_listeners=False):487        if is_full_url(_path):488            _path = _path.split("://", 1)[1]489            _path = "/%s" % (_path.split("/", 1)[1] if "/" in _path else "")490        base_url = forward_base_url or original_url491        result = update_path_in_url(base_url, _path)492        if run_listeners:493            for listener in listeners_inbound:494                result = listener.get_forward_url(method, path, data, headers) or result495        return result496    target_url = path497    if not is_full_url(target_url):498        target_url = "%s%s" % (forward_base_url, target_url)499    # update original "Host" header (moto s3 relies on this behavior)500    if not headers.get("Host"):501        headers["host"] = urlparse(target_url).netloc502    headers["X-Forwarded-For"] = build_x_forwarded_for(headers, client_address, server_address)503    response = None504    handler_chain_request = original_request.copy()505    modified_request_to_backend = None506    # run inbound handlers (pre-invocation)507    for listener in listeners_inbound:508        try:509            listener_result = listener.forward_request(510                method=handler_chain_request.method,511                path=handler_chain_request.path,512                data=handler_chain_request.data,513                headers=handler_chain_request.headers,514            )515        except HTTPException as e:516            # TODO: implement properly using exception handlers517            return http_exception_to_response(e)518        if isinstance(listener, MessageModifyingProxyListener):519            if isinstance(listener_result, RoutingRequest):520                # update the modified request details, then call next listener521                handler_chain_request.method = (522                    listener_result.method or handler_chain_request.method523                )524                handler_chain_request.path = listener_result.path or handler_chain_request.path525                if listener_result.data is not None:526                    handler_chain_request.data = listener_result.data527                if listener_result.headers is not None:528                    handler_chain_request.headers = listener_result.headers529            continue530        if isinstance(listener_result, Response):531            response = listener_result532            break533        if isinstance(listener_result, LambdaResponse):534            response = listener_result535            break536        if isinstance(listener_result, dict):537            response = Response()538            response._content = json.dumps(json_safe(listener_result))539            response.headers["Content-Type"] = APPLICATION_JSON540            response.status_code = 200541            break542        elif isinstance(listener_result, Request):543            # TODO: unify modified_request_to_backend (requests.Request) and544            #  handler_chain_request (ls.routing.Request)545            modified_request_to_backend = listener_result546            break547        elif http2_server.get_async_generator_result(listener_result):548            return listener_result549        elif listener_result is not True:550            # get status code from response, or use Bad Gateway status code551            code = listener_result if isinstance(listener_result, int) else 503552            response = Response()553            response.status_code = code554            response._content = ""555            response.headers["Content-Length"] = "0"556            append_cors_headers(request_headers=headers, response=response)557            return response558    # perform the actual invocation of the backend service559    headers_to_send = None560    data_to_send = None561    method_to_send = None562    if response is None:563        headers_to_send = handler_chain_request.headers564        headers_to_send["Connection"] = headers_to_send.get("Connection") or "close"565        data_to_send = handler_chain_request.data566        method_to_send = handler_chain_request.method567        request_url = get_proxy_backend_url(handler_chain_request.path, run_listeners=True)568        if modified_request_to_backend:569            if modified_request_to_backend.url:570                request_url = get_proxy_backend_url(571                    modified_request_to_backend.url, original_url=request_url572                )573            data_to_send = modified_request_to_backend.data574            if modified_request_to_backend.method:575                method_to_send = modified_request_to_backend.method576        # make sure we drop "chunked" transfer encoding from the headers to be forwarded577        headers_to_send.pop("Transfer-Encoding", None)578        response = requests.request(579            method_to_send,580            request_url,581            data=data_to_send,582            headers=headers_to_send,583            stream=True,584            verify=False,...

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