如何使用Outlook JS加载项将Outlook电子邮件附件上传

Question

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，以查找Outlook Mail项目的附件。在这里，在从Exchange Server获取附件时，它返回200个。

我有自己的云应用程序看起来像Google Drive。我想使用发布API调用将Outlook Mail附件上传到我的云服务器上。API呼叫成功运行。但是我无法从Exchange Server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);
      };
  

请帮助我从Outlook Mail中获取附件并在我的云服务器上上传。

Answer 1

attactment._data $ p $ 0给予附件元数据。从那里获取ID并使用GetAttachmentContentAsync API获取附件内容文档