我刚刚遇到了一个关于通过 asp.net webservice 检索数据的奇怪问题。
使用 JQuery 的 ajax 方法时,标头设置正确,数据在 JSON 中成功检索。
JSON 示例:
$.ajax({
type: "GET",
url: "service/TestService.asmx/GetTestData",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: callback,
error: function (err, xhr, res) {
alert(err);
}
});
上述请求标头如下:
Accept application/json, text/javascript, */*; q=0.01
Accept-Encoding gzip, deflate
Accept-Language en-US,en;q=0.5
Content-Type application/json; charset=utf-8
Host localhost
Referer http://localhost/
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0
X-Requested-With XMLHttpRequest
以上的响应标头如下:
Cache-Control private, max-age=0
Content-Length 327
Content-Type application/json; charset=utf-8
Date Tue, 29 Oct 2013 17:59:56 GMT
Server Microsoft-IIS/7.5
X-AspNet-Version 4.0.30319
X-Powered-By ASP.NET
这很好用。
但是对于 AngularJS $http 方法,Request Headers Content-Type 值没有设置,因此 Response Headers Content-Type 默认为text/xml; charset=utf-8
. 看看下面的例子:
$http({
method : 'GET',
url: 'service/TestService.asmx/GetTestData',
headers: {
'Accept': 'application/json, text/javascript, */*; q=0.01',
'Content-Type': 'application/json; charset=utf-8'
}
}).success(callback);
上面的请求标头如下,您会看到缺少 Content-Type:
Accept application/json, text/javascript, */*; q=0.01
Accept-Encoding gzip, deflate
Accept-Language en-US,en;q=0.5
Host localhost
Referer http://localhost/ComponentsAndRepos/
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0
因此,上述响应标头如下:
Cache-Control private, max-age=0
Content-Encoding gzip
Content-Length 341
Content-Type text/xml; charset=utf-8
Date Tue, 29 Oct 2013 17:59:56 GMT
Server Microsoft-IIS/7.5
Vary Accept-Encoding
X-AspNet-Version 4.0.30319
X-Powered-By ASP.NET
因此这会强制响应返回为 XML 而不是 JSON,有没有办法解决这个问题?
谢谢你,
更新 感谢 Erstad Stephen
这已通过向方法添加data:{}
属性来解决$http
。
$http({
method : 'GET',
url: 'service/TestService.asmx/GetTestData',
data: {},
headers: {
'Accept': 'application/json, text/javascript, */*; q=0.01',
'Content-Type': 'application/json; charset=utf-8'
}
}).success(callback);