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jQueryのajaxでバイナリのデータを取得する

Last updated at Posted at 2017-11-01

jQueryの$.ajax()でバイナリをGETすると、parsererrorが返ってくるんだが...?

  • $.ajax()はバイナリをテキスト扱いしてしまうため
  • ググってみると、jQueryを諦めて潔くXMLHttpRequestを書いて解決してる例が多い。。
    • Henry Algusさんのブログを参照して「$.ajaxで取得する方法はある!」と紹介しつつも、「$.ajaxTransportで長い記述したくない!」とXMLHttpRequestで済ませちゃう例が多数。。
      • そもそも、このブログでは何を言っているの?

BinaryTransport

使い方

Blobで取得

$.ajax({
	url: "image.png",
	type: "GET",
	dataType: 'binary',
	responseType:'blob',
	processData: false,
	success: function(result){
	}
});

ArrayBufferで取得

$.ajax({
	url: "image.png",
	type: "GET",
	dataType: 'binary',
	responseType:'arraybuffer',
	processData: false,
	success: function(result){
	}
});

これでコードがスッキリ!

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