I have a file located in a directory called testfolder on my local disk.
The contents of the file are as follows:
Apples are red. <colour = red/> latitude 13.124165
Would it be possible to retrieve the content of this file, store it in a variable, make some modifications, and then replace its original content?
fopen("C:\testfolder\test.text", 0);
var cont = ``; //store content in a variable?
//modify cont
fwrite(file, cont);
Is there a way to retrieve the content of this document and store it in a variable for potential modifications and updates?
To put it briefly: Absolutely.
A more detailed explanation: Indeed, It appears you are referring to synchronous operations. For instance, in node.js, you have the option to read and write files synchronously using fs.readFileSync() and fs.writeFileSync(), correspondingly.
Here's a quick demo:
user@host:~$ echo "Hello foo" > file.txt │
user@host:~$ node │
> var fs = require("fs"); │
undefined │
> var str = String(fs.readFileSync("file.txt")); │
undefined │
> str = str.replace("foo", "bar"); │
'Hello bar\n' │
> fs.writeFileSync("file.txt", str); │
undefined │
> process.exit(); // (Or simply type ctrl+d) │
user@host:~$ cat file.txt │
Hello bar
To access a file stored on the server, you must initiate an Ajax request from the client and handle it on the server side.
On the other hand, attempting to read a file directly from a user's computer is not feasible for security reasons.
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