101 lines
3.1 KiB
JavaScript
101 lines
3.1 KiB
JavaScript
import { EXTERNAL_LINK_REGEX } from '../../server/utils/fileUtils';
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export const hijackConsoleErrorsScript = (offs) => {
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const s = `
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function getScriptOff(line) {
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var offs = ${offs};
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var l = 0;
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var file = '';
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for (var i=0; i<offs.length; i++) {
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var n = offs[i][0];
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if (n < line && n > l) {
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l = n;
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file = offs[i][1];
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}
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}
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return [line - l, file];
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}
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// catch reference errors, via http://stackoverflow.com/a/12747364/2994108
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window.onerror = function (msg, url, lineNumber, columnNo, error) {
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var string = msg.toLowerCase();
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var substring = "script error";
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var data = {};
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if (url.match(${EXTERNAL_LINK_REGEX}) !== null && error.stack){
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var errorNum = error.stack.split('about:srcdoc:')[1].split(':')[0];
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var fileInfo = getScriptOff(errorNum);
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data = msg + ' (' + fileInfo[1] + ': line ' + fileInfo[0] + ')';
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} else {
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var fileInfo = getScriptOff(lineNumber);
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data = msg + ' (' + fileInfo[1] + ': line ' + fileInfo[0] + ')';
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}
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window.parent.postMessage([{
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log: [{
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method: 'error',
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data: [data],
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id: Date.now().toString()
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}],
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source: fileInfo[1]
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}], '*');
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return false;
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};
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// catch rejected promises
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window.onunhandledrejection = function (event) {
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if (event.reason && event.reason.message && event.reason.stack){
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var errorNum = event.reason.stack.split('about:srcdoc:')[1].split(':')[0];
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var fileInfo = getScriptOff(errorNum);
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var data = event.reason.message + ' (' + fileInfo[1] + ': line ' + fileInfo[0] + ')';
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window.parent.postMessage([{
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log: [{
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method: 'error',
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data: [data],
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id: Date.now().toString()
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}],
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source: fileInfo[1]
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}], '*');
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}
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};
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`;
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return s;
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};
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export const startTag = '@fs-';
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export const getAllScriptOffsets = (htmlFile) => {
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const offs = [];
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const hijackConsoleErrorsScriptLength = 52;
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const embeddedJSStart = 'script crossorigin=""';
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let foundJSScript = true;
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let foundEmbeddedJS = true;
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let lastInd = 0;
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let ind = 0;
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let endFilenameInd = 0;
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let filename = '';
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let lineOffset = 0;
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while (foundJSScript) {
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ind = htmlFile.indexOf(startTag, lastInd);
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if (ind === -1) {
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foundJSScript = false;
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} else {
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endFilenameInd = htmlFile.indexOf('.js', ind + startTag.length + 1);
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filename = htmlFile.substring(ind + startTag.length, endFilenameInd);
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lineOffset = htmlFile.substring(0, ind).split('\n').length + hijackConsoleErrorsScriptLength;
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offs.push([lineOffset, filename]);
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lastInd = ind + 1;
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}
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}
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lastInd = 0;
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while (foundEmbeddedJS) {
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ind = htmlFile.indexOf(embeddedJSStart, lastInd);
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if (ind === -1) {
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foundEmbeddedJS = false;
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} else {
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filename = 'index.html';
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// not sure where the offset of 25 comes from
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lineOffset = htmlFile.substring(0, ind).split('\n').length + 25;
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offs.push([lineOffset, filename]);
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lastInd = ind + 1;
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}
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}
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return offs;
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};
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