如何阅读本地文本文件？

Question

I want to read a local text file automatically whenever my webpage is opened on my computer. How can I do this? I used the following code from one of solutions answered on this site and it says "Access is denied".

<script type="text/javascript">
var fileDisplayArea = document.getElementById('fileText');  //to show output
function readTextFile(file)
{
    var rawFile = new XMLHttpRequest();
    rawFile.open("GET", file, false);
    rawFile.onreadystatechange = function ()
    {
        if(rawFile.readyState === 4)
        {
            if(rawFile.status === 200 || rawFile.status == 0)
            {
                var allText = rawFile.responseText;
                fileDisplayArea.innerText = allText 
            }
        }
    }
    rawFile.send(null);
}

readTextFile("file:///Location/fileToBeRead.txt");
</script>  

Is there any other solution to this problem?

Answer 1

You cannot read file off a persons local machine.

You can only read files from the same domain that your site is running on (or if using jsonp to get past XSS rules)

Answer 2

You should not be reading files on a client machine. Its a security issue and hence not allowed (access denied). If you want to store data on client machine use cookies rather or as correctly pointed out use a html session or local storage.

Answer 3

为了安全起见，天生就没有方法（从URL ... file:///... ）读取系统文件。

Answer 4

您可能可以使用HTML5的本地存储功能来执行此操作。