38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
const path = require('path');
|
||
|
|
const timeoutErrorTilePath = path.join(__dirname, '/../../assets/render-timeout-fallback.png');
|
||
|
|
const timeoutErrorTile = require('fs').readFileSync(timeoutErrorTilePath, { encoding: null });
|
||
|
|
|
||
|
|
module.exports = function getOnTileErrorStrategy ({ enabled }) {
|
||
|
|
let onTileErrorStrategy;
|
||
|
|
|
||
|
|
if (enabled !== false) {
|
||
|
|
onTileErrorStrategy = async function onTileErrorStrategy$TimeoutTile (err, format) {
|
||
|
|
function isRenderTimeoutError (err) {
|
||
|
|
return err.message === 'Render timed out';
|
||
|
|
}
|
||
|
|
|
||
|
|
function isDatasourceTimeoutError (err) {
|
||
|
|
return err.message && err.message.match(/canceling statement due to statement timeout/i);
|
||
|
|
}
|
||
|
|
|
||
|
|
function isTimeoutError (err) {
|
||
|
|
return isRenderTimeoutError(err) || isDatasourceTimeoutError(err);
|
||
|
|
}
|
||
|
|
|
||
|
|
function isRasterFormat (format) {
|
||
|
|
return format === 'png' || format === 'jpg';
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isTimeoutError(err) && isRasterFormat(format)) {
|
||
|
|
return { buffer: timeoutErrorTile, headers: { 'Content-Type': 'image/png' }, stats: {} };
|
||
|
|
} else {
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
return onTileErrorStrategy;
|
||
|
|
};
|