import { EXTERNAL_LINK_REGEX } from '../../server/utils/fileUtils'; export const hijackConsoleErrorsScript = (offs) => { const s = ` function getScriptOff(line) { var offs = ${offs}; var l = 0; var file = ''; for (var i=0; i l) { l = n; file = offs[i][1]; } } return [line - l, file]; } // catch reference errors, via http://stackoverflow.com/a/12747364/2994108 window.onerror = function (msg, url, lineNumber, columnNo, error) { var string = msg.toLowerCase(); var substring = "script error"; var data = {}; if (url.match(${EXTERNAL_LINK_REGEX}) !== null && error.stack){ var errorNum = error.stack.split('about:srcdoc:')[1].split(':')[0]; var fileInfo = getScriptOff(errorNum); data = msg + ' (' + fileInfo[1] + ': line ' + fileInfo[0] + ')'; } else { var fileInfo = getScriptOff(lineNumber); data = msg + ' (' + fileInfo[1] + ': line ' + fileInfo[0] + ')'; } window.parent.postMessage([{ log: [{ method: 'error', data: [data], id: Date.now().toString() }], source: fileInfo[1] }], '*'); return false; }; `; return s; }; export const startTag = '@fs-'; export const getAllScriptOffsets = (htmlFile) => { const offs = []; let found = true; let lastInd = 0; let ind = 0; let endFilenameInd = 0; let filename = ''; let lineOffset = 0; while (found) { ind = htmlFile.indexOf(startTag, lastInd); if (ind === -1) { found = false; } else { endFilenameInd = htmlFile.indexOf('.js', ind + startTag.length + 3); filename = htmlFile.substring(ind + startTag.length, endFilenameInd); // the length of hijackConsoleErrorsScript is 36 lines lineOffset = htmlFile.substring(0, ind).split('\n').length + 36; offs.push([lineOffset, filename]); lastInd = ind + 1; } } return offs; };