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import { DEV } from 'esm-env';
import { json, text } from '../../exports/index.js';
import { coalesce_to_error, get_message, get_status } from '../../utils/error.js';
import { negotiate } from '../../utils/http.js';
import { HttpError } from '../control.js';
import { fix_stack_trace } from '../shared-server.js';
import { ENDPOINT_METHODS } from '../../constants.js';
/** @param {any} body */
export function is_pojo(body) {
if (typeof body !== 'object') return false;
if (body) {
if (body instanceof Uint8Array) return false;
if (body instanceof ReadableStream) return false;
}
return true;
}
/**
* @param {Partial<Record<import('types').HttpMethod, any>>} mod
* @param {import('types').HttpMethod} method
*/
export function method_not_allowed(mod, method) {
return text(`${method} method not allowed`, {
status: 405,
headers: {
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/405
// "The server must generate an Allow header field in a 405 status code response"
allow: allowed_methods(mod).join(', ')
}
});
}
/** @param {Partial<Record<import('types').HttpMethod, any>>} mod */
export function allowed_methods(mod) {
const allowed = ENDPOINT_METHODS.filter((method) => method in mod);
if ('GET' in mod || 'HEAD' in mod) allowed.push('HEAD');
return allowed;
}
/**
* Return as a response that renders the error.html
*
* @param {import('types').SSROptions} options
* @param {number} status
* @param {string} message
*/
export function static_error_page(options, status, message) {
let page = options.templates.error({ status, message });
if (DEV) {
// inject Vite HMR client, for easier debugging
page = page.replace('</head>', '<script type="module" src="/@vite/client"></script></head>');
}
return text(page, {
headers: { 'content-type': 'text/html; charset=utf-8' },
status
});
}
/**
* @param {import('@sveltejs/kit').RequestEvent} event
* @param {import('types').SSROptions} options
* @param {unknown} error
*/
export async function handle_fatal_error(event, options, error) {
error = error instanceof HttpError ? error : coalesce_to_error(error);
const status = get_status(error);
const body = await handle_error_and_jsonify(event, options, error);
// ideally we'd use sec-fetch-dest instead, but Safari — quelle surprise — doesn't support it
const type = negotiate(event.request.headers.get('accept') || 'text/html', [
'application/json',
'text/html'
]);
if (event.isDataRequest || type === 'application/json') {
return json(body, {
status
});
}
return static_error_page(options, status, body.message);
}
/**
* @param {import('@sveltejs/kit').RequestEvent} event
* @param {import('types').SSROptions} options
* @param {any} error
* @returns {Promise<App.Error>}
*/
export async function handle_error_and_jsonify(event, options, error) {
if (error instanceof HttpError) {
return error.body;
}
if (__SVELTEKIT_DEV__ && typeof error == 'object') {
fix_stack_trace(error);
}
const status = get_status(error);
const message = get_message(error);
return (await options.hooks.handleError({ error, event, status, message })) ?? { message };
}
/**
* @param {number} status
* @param {string} location
*/
export function redirect_response(status, location) {
const response = new Response(undefined, {
status,
headers: { location }
});
return response;
}
/**
* @param {import('@sveltejs/kit').RequestEvent} event
* @param {Error & { path: string }} error
*/
export function clarify_devalue_error(event, error) {
if (error.path) {
return `Data returned from \`load\` while rendering ${event.route.id} is not serializable: ${error.message} (data${error.path})`;
}
if (error.path === '') {
return `Data returned from \`load\` while rendering ${event.route.id} is not a plain object`;
}
// belt and braces — this should never happen
return error.message;
}
/**
* @param {import('types').ServerDataNode} node
*/
export function stringify_uses(node) {
const uses = [];
if (node.uses && node.uses.dependencies.size > 0) {
uses.push(`"dependencies":${JSON.stringify(Array.from(node.uses.dependencies))}`);
}
if (node.uses && node.uses.search_params.size > 0) {
uses.push(`"search_params":${JSON.stringify(Array.from(node.uses.search_params))}`);
}
if (node.uses && node.uses.params.size > 0) {
uses.push(`"params":${JSON.stringify(Array.from(node.uses.params))}`);
}
if (node.uses?.parent) uses.push('"parent":1');
if (node.uses?.route) uses.push('"route":1');
if (node.uses?.url) uses.push('"url":1');
return `"uses":{${uses.join(',')}}`;
}
/**
* @param {string} message
* @param {number} offset
*/
export function warn_with_callsite(message, offset = 0) {
if (DEV) {
const stack = fix_stack_trace(new Error()).split('\n');
const line = stack.at(3 + offset);
message += `\n${line}`;
}
console.warn(message);
}
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