ajax返回数据解密,使用jQuery.ajax()获取图像并将其解码为base64

首先,根据

Retrieving binary file content using Javascript,base64 encode it and reverse-decode it using Python添加正确的mimetype到Ajax调用：

$.ajax({

url: "someurltoajpeg",headers: {

"Authorization" : "Basic " + btoa("user:pw")

},xhrFields: {

withCredentials: true

},mimeType: "text/plain; charset=x-user-defined"

}).done(function( data,jqXHR ) {

$("#image").attr('src',' + base64encode(data));

}).fail(function( jqXHR,errorThrown ) {

alert("fail: " + errorThrown);

});

然后使用base64Encode函数,而不是btoa：

function base64Encode(str) {

var CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

var out = "",i = 0,len = str.length,c1,c2,c3;

while (i < len) {

c1 = str.charCodeAt(i++) & 0xff;

if (i == len) {

out += CHARS.charAt(c1 >> 2);

out += CHARS.charAt((c1 & 0x3) << 4);

out += "==";

break;

}

c2 = str.charCodeAt(i++);

if (i == len) {

out += CHARS.charAt(c1 >> 2);

out += CHARS.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));

out += CHARS.charAt((c2 & 0xF) << 2);

out += "=";

break;

}

c3 = str.charCodeAt(i++);

out += CHARS.charAt(c1 >> 2);

out += CHARS.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4));

out += CHARS.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6));

out += CHARS.charAt(c3 & 0x3F);

}

return out;

}

再见