How to send binary data via JQuery Ajax PUT method -


I'm new to jQuery and I want to use JQuery Ajax to upload some files to the server, only When I send some binary files (such as gif or jpeg) to my server in a seam method, the upload is successful, but the content of the binary data was changed (it is always larger than the original file size). I try to change the content type or file result type, but still does not work, how does this fix any?

PS: I can not encode the contents of the binary file in another form, because I can not touch the server's code. 

  var reader = new FileReader (); Reader.loadload = (function (dfile) {$ .ajax ({url: url, process data: false, // content type: "app / octet-stream; charset = uTF-8", data: file.result, type : 'PUT', success: function () {console.log ("okay!");}, Error: function () {console.log ("not ok!");}});}) ); Reader.readAsBinaryString (file);  
 
 Most (all?) Browsers automatically send string datatypes to UTF-8 Send them through a  XMLHttpRequest  When you read the file as a binary string, you are given exactly this: a JavaScript string object where each character has a value between 0 and 255. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Must be an object. 
 
 If you need access to the content file before sending, you can convert it to a  ArrayBuffer  with the following code: 
 
  var arrBuff = new ArrayBuffer (file.result.length); Var Author = New Uint8Array (arrBuff); For (var i = 0, len = file.result.length; i & lt; len; i ++) {author [i] = file.result.charCodeAt (i); }  
 
 and you want to pass  arrBuff  to the AJAX function. Otherwise, you should have your  FileReader  code

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