Microsoft Graph API附件处理

Question

        local.downloadAttachment = function (data) {
            $.get("https://graph.microsoft.com/v1.0/me/messages/" + self.EmailID() + "/attachments/" + data.id, null, function (results) {
                var bytes = new Uint8Array(results.contentBytes); // pass your byte response to this constructor
                var blob = new Blob([bytes], { type: results.contentType });// change resultByte to bytes

                //Alt method, also doesn't work but seems a lot closer to the right solution.
                //var altBytes = $.base64.decode(results.contentBytes);
                //var blob = new Blob([altBytes], { type: results.contentType });

                var link = document.createElement('a');
                link.href = window.URL.createObjectURL(blob);
                link.download = results.name;
                link.click();
            });
        };

任何想法都会很棒。

Answer 1

谢谢@Mohit Verma，你帮我回到了正轨。但是，双重解码似乎不是确切的问题，因为下面的代码抛出了

未捕获的DomException：在“窗口”上执行“atob”失败：要解码的字符串编码不正确。

        local.downloadAttachment = function (data) {
            $.get("https://graph.microsoft.com/v1.0/me/messages/" + self.EmailID() + "/attachments/" + data.id, null, function (results) {
                var raw = window.atob(window.atob(results.contentBytes));
                var rawLength = raw.length;
                var array = new Uint8Array(new ArrayBuffer(rawLength));      // pass your byte response to this constructor

                for (var i = 0; i < rawLength; i++) {
                    array[i] = raw.charCodeAt(i);
                }

                var blob = new Blob([array], { type: results.contetType });

                var link = document.createElement('a');
                link.href = window.URL.createObjectURL(blob);
                link.download = results.name;
                link.click();
            });
        };

但是，由于results.ContentBytes被转换为ByteArray（这是Blob构造函数所期望的），所以这段代码可以工作。

        local.downloadAttachment = function (data) {
            $.get("https://graph.microsoft.com/v1.0/me/messages/" + self.EmailID() + "/attachments/" + data.id, null, function (results) {
                var raw = window.atob(results.contentBytes);
                var rawLength = raw.length;
                var array = new Uint8Array(new ArrayBuffer(rawLength));      // pass your byte response to this constructor

                for (var i = 0; i < rawLength; i++) {
                    array[i] = raw.charCodeAt(i);
                }

                var blob = new Blob([array], { type: results.contetType });

                var link = document.createElement('a');
                link.href = window.URL.createObjectURL(blob);
                link.download = results.name;
                link.click();
            });
        };