Display image from http response with image content type

Question

Let's say I have url and don't know what it will return. I perform ajax call to that url with javascript and get the content. So I test it's content-type and decide how to show response in my webpage. In case it is json or html or any other text, I append the formatted content as I need.

Now when the content type is image, I get the image's data in response, which is not base64 encoded. I need to show the image in a regular <img> tag of course. And here is where I get stuck.

Is there a way to show image from it's content data?

EDIT

Just to make it clear, hear is what I get in response:

"�PNG


IHDR��Nn�tEXtSoftwareAdobe ImageReadyq�e<fiTXtXML:com.adobe.xmp<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?> <x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.0-c060 61.134777, 2010/02/12-17:32:00        "> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"> <rdf:Description rdf:about="" xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/" xmlns:stRef="http://ns.adobe.com/xap/1.0/sType/ResourceRef#" xmlns:xmp="http://ns.adobe.com/xap/1.0/" xmpMM:OriginalDocumentID="xmp.did:8E935AD20E206811822AA1DC23D37A5E" xmpMM:DocumentID="xmp.did:606C15E3DC2311E2A81EB553B5E13CE0" xmpMM:InstanceID="xmp.iid:606C15E2DC2311E2A81EB553B5E13CE0" xmp:CreatorTool="Adobe Photoshop CS5 Macintosh"> <xmpMM:DerivedFrom stRef:instanceID="xmp.iid:0E49679B0D20681192B0DE3AF6794EF0" stRef:documentID="xmp.did:8E935AD20E206811822AA1DC23D37A5E"/> </rdf:Description> </rdf:RDF> </x:xmpmeta> <?xpacket end="r"?>�,��
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Answer 1

var rawResponse = "�PNG...."; // truncated for example

// convert to Base64
var b64Response = btoa(rawResponse);

// create an image
var outputImg = document.createElement('img');
outputImg.src = 'data:image/png;base64,'+b64Response;

// append it to your page
document.body.appendChild(outputImg);