javascript - Read and parse file, on server or client side? -

javascript - Read and parse file, on server or client side? -

my question simple: should read , parse file on server or client side?

i want validate , show info in html format.

if on client side, read spreadsheet document, csv or xml info file , want know if there libraries javascript create happen (i googled options, believe of can suggest libraries have used)

if mean read files via javascript within browser, cannot sand-boxing prevent known security reasons. left server side many options available process kind of file.

[edit] although html5 provides api manipulate files, browser back upwards not beingness finish across different browsers, viable alternative stick server side processing.

javascript file-io client-server server-side