Read write to file using jQuery

Question

Is there a way to get jQuery to get information to and from a file  Is it possible  How

User · Answer

Cookies are your best bet   Look for the jquery cookie plugin   Cookies are designed for this sort of situation -- you want to keep some information about this client on client side   Just be aware that cookies are passed back and forth on every web request so you can t store large amounts of data in there   But just a simple answer to a question should be fine

User · Answer

No  JavaScript doesn t have access to writing files as this would be a huge security risk to say the least  If you wanted to get store information server-side  though  you can certainly make an Ajax call to a PHP ASP Python etc  script that can then get store the data in the server  If you meant store data on the client machine  this is impossible with JavaScript alone  I suspect Flash Java may be able to  but I am not sure   If you are only trying to store a small amount of information for an unreliable period of time regarding a specific user  I think you want Web Storage API or cookies  I am not sure from your question what you are trying to accomplish  though

User · Answer

Use javascript s execCommand  SaveAs   false  filename   functionality  Edit  No longer works   This Javascript function used to work across all browsers  but now only on IE  due to browser security considerations   It presented a  Save As  Dialog to the user who runs this function through their browser  the user presses OK and the file is saved by javascript on the server side   Now this code is an rare antique zero day collectible        content is the data  a string  you ll write to file     filename is a string filename to write to on server side     This function uses iFrame as a buffer  it fills it up with your content    and prompts the user to save it out  function save content to file content  filename       var dlg   false      with document        ir createElement  iframe         ir id  ifr        ir location  about blank        ir style display  none        body appendChild ir         with getElementById  ifr   contentWindow document              open  text plain    replace               charset    utf-8              write content              close               document charset    utf-8              dlg   execCommand  SaveAs   false  filename                   body removeChild ir              return dlg      Invoke the function like this   msg     I am the president of tautology club    save content to file msg   C   test

User · Answer

If you want to do this without a bunch of server-side processing within the page  it might be a feasible idea to blow the text value into a hidden field  using PHP   Then you can use jQuery to process the hidden field value   Whatever floats your boat

User · Answer

Yes it is possible   The technique is described below  http   jquery tiddlywiki org twFile html

User · Answer

both HTML5 and Google Gears add local storage capabilities  mainly by an embedded SQLite API

User · Answer

You will need to handle your file access through web programming language  such as PHP or ASP net   To set this up  you would    Create a script that handles the file reading and writing   This should be visible to the browser  Send jQuery ajax requests to that script that either write data or read data   You would need to pass all of your read write information through the request parameters   You can learn more about this in the jQuery ajax documentation    Make sure that you sanitize any data that you are storing  since this could potentially be a security risk   However  this is really just standard flat-file data storage  and is not necessarily that unusual   As Paolo pointed out  there is no way to directly read write to a file through jQuery or any other type of javascript

[jquery] Read/write to file using jQuery

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