如何使用outlook Js加载项在我的云服务器上上载outlook电子邮件附件

我正在使用vs2017开发outlook javascript加载项。我创建了一个示例应用程序，用于从outlook邮件项目中查找附件。在这里，当从Exchange Server获取附件时，它返回200 OK

我有自己的云应用程序，看起来像谷歌硬盘。我想使用POST API调用在云服务器上上载outlook邮件附件。API调用已成功运行。但我无法从exchange服务器获取文件内容

我在这里添加了一些示例代码

• 创建服务请求

          /// <reference path="../App.js" />
      var xhr;
      var serviceRequest;
  
      (function () {
          "use strict";
  
          // The Office initialize function must be run each time a new page is loaded
          Office.initialize = function (reason) {
              $(document).ready(function () {
                  app.initialize();
  
                  initApp();
              });
          };
  
          function initApp() {
              $("#footer").hide();
  
              if (Office.context.mailbox.item.attachments == undefined) {
                  var testButton = document.getElementById("testButton");
                  testButton.onclick = "";
                  showToast("Not supported", "Attachments are not supported by your Exchange server.");
              } else if (Office.context.mailbox.item.attachments.length == 0) {
                  var testButton = document.getElementById("testButton");
                  testButton.onclick = "";
                  showToast("No attachments", "There are no attachments on this item.");
              } else {
  
                  // Initalize a context object for the app.
                  //   Set the fields that are used on the request
                  //   object to default values.
                  serviceRequest = new Object();
                  serviceRequest.attachmentToken = "";
                  serviceRequest.ewsUrl = Office.context.mailbox.ewsUrl;
                  serviceRequest.attachments = new Array();
              }
          };
  
      })();
  
      function testAttachments() {
          Office.context.mailbox.getCallbackTokenAsync(attachmentTokenCallback);
      };
  
      function attachmentTokenCallback(asyncResult, userContext) {
          if (asyncResult.status == "succeeded") {
              serviceRequest.attachmentToken = asyncResult.value;
              makeServiceRequest();
          }
          else {
              showToast("Error", "Could not get callback token: " + asyncResult.error.message);
          }
      }
  
      function makeServiceRequest() {
          var attachment;
          xhr = new XMLHttpRequest();
          // Update the URL to point to your service location.
          xhr.open("POST", "https://localhost:8080/GetOutlookAttachments/AttachmentExampleService/api/AttachmentService", true);
  
          xhr.setRequestHeader("Content-Type", "application/json; charset=utf-8");
          xhr.onreadystatechange = requestReadyStateChange;
  
          // Translate the attachment details into a form easily understood by WCF.
          for (i = 0; i < Office.context.mailbox.item.attachments.length; i++) {
              attachment = Office.context.mailbox.item.attachments[i];
              attachment = attachment._data$p$0 || attachment.$0_0;
  
              if (attachment !== undefined) {
                  serviceRequest.attachments[i] = JSON.parse(JSON.stringify(attachment));
              }
          }
  
          // Send the request. The response is handled in the 
          // requestReadyStateChange function.
          xhr.send(JSON.stringify(serviceRequest));
      };
  
  
      // Handles the response from the JSON web service.
      function requestReadyStateChange() {
          if (xhr.readyState == 4) {
              if (xhr.status == 200) {
                  var response = JSON.parse(xhr.responseText);
                  if (!response.isError) {
                      // The response indicates that the server recognized
                      // the client identity and processed the request.
                      // Show the response.
                      var names = "<h2>Attachments processed: " + response.attachmentsProcessed + "</h2>";
                      document.getElementById("names").innerHTML = names;
                  } else {
                      showToast("Runtime error", response.message);
                  }
              } else {
                  if (xhr.status == 404) {
                      showToast("Service not found", "The app server could not be found.");
                  } else {
                      showToast("Unknown error", "There was an unexpected error: " + xhr.status + " -- " + xhr.statusText);
                  }
              }
          }
      };
  
      // Shows the service response.
      function showResponse(response) {
          showToast("Service Response", "Attachments processed: " + response.attachmentsProcessed);
      }
  
      // Displays a message for 10 seconds.
      function showToast(title, message) {
  
          var notice = document.getElementById("notice");
          var output = document.getElementById('output');
  
          notice.innerHTML = title;
          output.innerHTML = message;
  
          $("#footer").show("slow");
  
          window.setTimeout(function () { $("#footer").hide("slow") }, 10000);
      };
  

  //
  var-xhr；
  var服务请求；
  （功能（）{
  “严格使用”；
  //每次加载新页面时，必须运行Office初始化功能
  Office.initialize=函数（原因）{
  $（文档）.ready（函数（）{
  app.initialize（）；
  initApp（）；
  });
  };
  函数initApp（）{
  $（“#页脚”）.hide（）；
  if（Office.context.mailbox.item.attachments==未定义）{
  var testButton=document.getElementById（“testButton”）；
  testButton.onclick=“”；
  showToast（“不支持”，“Exchange服务器不支持附件”）；
  }else if（Office.context.mailbox.item.attachments.length==0）{
  var testButton=document.getElementById（“testButton”）；
  testButton.onclick=“”；
  showToast（“无附件”，“此项目上没有附件”）；
  }否则{
  //初始化应用程序的上下文对象。
  //设置请求中使用的字段
  //对象设置为默认值。
  serviceRequest=新对象（）；
  serviceRequest.attachmentToken=“”；
  serviceRequest.ewsUrl=Office.context.mailbox.ewsUrl；
  serviceRequest.attachments=新数组（）；
  }
  };
  })();
  函数testAttachments（）{
  Office.context.mailbox.getCallbackTokenAsync（attachmentTokenCallback）；
  };
  函数attachmentTokenCallback（asyncResult，userContext）{
  如果（asyncResult.status==“成功”）{
  serviceRequest.attachmentToken=asyncResult.value；
  makeServiceRequest（）；
  }
  否则{
  showToast（“错误”，“无法获取回调令牌：”+asyncResult.Error.message）；
  }
  }
  函数makeServiceRequest（）{
  var附件；
  xhr=newXMLHttpRequest（）；
  //更新URL以指向您的服务位置。
  xhr.open（“POST”https://localhost:8080/GetOutlookAttachments/AttachmentExampleService/api/AttachmentService“，对）；
  setRequestHeader（“内容类型”，“应用程序/json；字符集=utf-8”）；
  xhr.onreadystatechange=requestReadyStateChange；
  //将附件详细信息转换为WCF易于理解的格式。
  对于（i=0；i

---

请帮助我从outlook mail获取附件并上载到我的云服务器。

附件。\数据$p$0提供给附件元数据。从那里获取id并使用getAttachmentContentAsync API获取附件内容。\数据$p$0提供给附件元数据。从那里获取id，并使用getAttachmentContentAsync API获取附件内容