How to catch error net::ERR_FILE_NOT_FOUND when performing XMLHttpRequest to local files?

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Maxim Nikolaevich

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Jan 9, 2018, 1:30:43 AM1/9/18
to Chromium-Extensions-Announce
I want to create chrome extension which will be able to read local files. My simplyfied code is:

import url from 'url'

const readFile = (filePath) => {
  return new Promise(function (resolve, reject) {
    const xhr = new XMLHttpRequest()
    xhr.onerror = (error) => {
      reject(error)
    }
    xhr.onreadystatechange = function () {
      if (xhr.readyState === 4) {
        resolve(xhr.response)
      }
    }
    xhr.ontimeout = function () {
      reject('timeout')
    }
    xhr.open('GET', filePath)
    xhr.send()
    
  })
}

chrome.tabs.onUpdated.addListener(async function (tabId, changeInfo, tab) {
  if (changeInfo.status === 'complete') {
    let text
    try {
      text = await readFile('file:///home/maxim/Documents/text.jsa')
    } catch (e) {
      console.log('Error: ', e)
    }    
    console.log(text);
  }
})

This code successfully works when my filePath is correct. But when it is not Chrome console throws this error:

GET file:///home/maxim/Documents/text.jsa net::ERR_FILE_NOT_FOUND

How can I catch this type of errors?

PhistucK

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Jan 9, 2018, 3:13:13 AM1/9/18
to Maxim Nikolaevich, Chromium-Extensions-Announce
When dealing with file://, I think any time onerror is triggered means the file either does not exist, is inaccessible (bad sectors?) or there is a permission error (all of which may manifest as ERR_FILE_NOT_FOUND as well, I do not know). You cannot get that error using JavaScript, it is an internal error that is just shown in the Developer Tools in order to help (or hurt ;)) debugging.


☆PhistucK

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Maxim Nikolaevich

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Jan 9, 2018, 6:06:44 AM1/9/18
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Ok! So may be do you know another way how I can check if path to local file is correct or not?


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PhistucK

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Jan 11, 2018, 3:54:53 AM1/11/18
to Maxim Nikolaevich, Chromium-Extensions-Announce
I do not think there is one (other than going native with native messaging).


☆PhistucK



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Jesse Talamantez

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Jan 11, 2018, 9:43:53 PM1/11/18
to PhistucK, Maxim Nikolaevich, Chromium-Extensions-Announce
My experience is that there is a THEY in the playingroundseeminglyearoundecimalsponserdlessessions"'"



☆PhistucK

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