前言: 作为一个前端,在开发项目期间不可避免的就会遇到,跨域请求这类问题....
正文:
- 前几天在开发项目期间:遇到跨域请求这类问题,由于一开始找不到问题所在之处,采坑不少.所遇问题如下图
找了好久才发现,产生这种情况的原因: 在请求头部需要添加一些代码
beforeSend: function(xhr) { xhr.setRequestHeader('Authorization', "Basic " + new Base64().encode('trusted' + ":" + 'secret')); },
再添加这些之后又报了 : Access-Control-Allow-Origin在同一个项目出现多个headers,Google浏览器默认会对其进行拦截...
于是又搞了半天修改Chrome的属性,具体的方式参考这个链接...
具体方式是在目标中添加这个: C:\Users\jack\AppData\Local\Google\Chrome\Application\chrome.exe --disable-web-security --user-data-dir=C:\Users\jack\Desktop\mychromdev
意味在可以桌面上新建一个文件夹(用来临时存储资源):
:
2.上面顺序走完之后,项目就能进行跨域访问了, 具体代码如下:
$.ajax({
type: 'POST',
dataType: 'json',
url: 'http://api/uaa/oauth/token',//api:请求的url
//data: {username:userName, password:password,grant_type:'password'},
//测试
data: {username:'sales', password:'000000',grant_type:'password'},
success: function(data) {
console.log(data);
},
beforeSend: function(xhr) {
xhr.setRequestHeader('Authorization', "Basic " + new Base64().encode('trusted' + ":" + 'secret'));
},
});
function Base64() {
var _keyStr;
// private property
_keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
// public method for encoding
this.encode = function (input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = _utf8_encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
_keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
_keyStr.charAt(enc3) + _keyStr.charAt(enc4);
}
return output;
}
// public method for decoding
this.decode = function (input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = _keyStr.indexOf(input.charAt(i++));
enc2 = _keyStr.indexOf(input.charAt(i++));
enc3 = _keyStr.indexOf(input.charAt(i++));
enc4 = _keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
output = _utf8_decode(output);
return output;
}
var _utf8_encode;
// private method for UTF-8 encoding
_utf8_encode = function (string) {
string = string.replace(/\r\n/g, "\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
} else if ((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
} else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
}
var _utf8_decode;
// private method for UTF-8 decoding
_utf8_decode = function (utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while (i < utftext.length) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
} else if ((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i + 1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
} else {
c2 = utftext.charCodeAt(i + 1);
c3 = utftext.charCodeAt(i + 2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
}