angularjs - transformResponse header 参数 ($resource) 中缺少自定义响应的 header

Question

我定义了一个 $resource到 API 端点，该端点返回包含多个 headers 的响应但在 transformResponse headersGetter 中缺少大部分头文件的配置功能函数参数。

我该如何解决？

API的响应头

HTTP/1.1 201 Created
Server: Apache-Coyote/1.1
x-content-type-options: nosniff
x-xss-protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
x-frame-options: DENY
Access-Control-Allow-Origin: http://localhost:9000
access-control-allow-methods: POST, PUT, GET, DELETE, OPTIONS
access-control-allow-headers: Content-Type
Access-Control-Allow-Credentials: true
Content-Disposition: attachment; filename="testCall.pcap"
FileName: testCall.pcap
Content-Type: application/pcap

transformResponse的标题

Pragma: no-cache
Content-Type: application/pcap
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Expires: 0

app.factory("MyService", function ($resource, ENV, _) {
    return {
        testCall: $resource(ENV.apiEndpoint + "/test-call", {}, {
            launch: {
                method: 'POST',
                isArray: false,
                headers:{'Accept':'application/octet-stream'},
                responseType: 'blob',
                cache: false,
                transformResponse: function(data, headers){
                    var filename = headers('Content-Disposition'); //headers('FileName')
                    var contentType = headers('Content-Type');

                    var file = new Blob([data], {
                        type: contentType
                    });

                    var fileURL = URL.createObjectURL(file);
                    var a         = document.createElement('a');
                    a.href        = fileURL;
                    a.target      = '_blank';
                    a.download    = filename;
                    document.body.appendChild(a);
                    a.click();
                }
            }
        }),
        searchOptions: $resource(ENV.apiEndpoint + "//search-options")
    };
});

Answer 1

假设您正在进行 CORS 调用，响应 header 并未全部公开。服务器端需要在 CORS 过滤器中添加响应头“Access-Control-Expose-Headers”。

例如要使用 CORS 调用读取名为“X-MY-HEADER1”和“X-MY-HEADER2”的自定义响应 header ，服务器添加 header
Access-Control-Expose-Headers: "X-MY-HEADER1, X-MY-HEADER2"
请参阅@nancoder 的回答 https://stackoverflow.com/a/23726352/4684232