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我正在使用 Office 365 REST API 来获取邮件的附件。我可以正常获取文件附件，但如果附件类型为 : "#Microsoft.OutlookServices.ItemAttachment"。我得到这个 ItemAttachment 的 ID，然后使用这个请求来获取文件附件：
https://outlook.office.com/api/v1.0/me/messages/MESSAGE_ID/attachments/FILE_ITEM_ID?$expand=Microsoft.OutlookServices.ItemAttachment/Item

响应返回具有新属性“Item”，包含 HasAttachments = false 的“#Microsoft.OutlookServices.Message”。但是尝试使用 Web Outlook 版本，我可以得到这个项目附件（在这种情况下是一个.eml文件，执行它会打开一个新的邮件表单）。这是一个例子：

{"@odata.context"=>
  "https://outlook.office.com/api/v1.0/$metadata#Me/Messages('AAMkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgBGAAAAAADkAZdAt2CKRb7qeDvUo2cCBwAM_24JjVmvQpKtlDshSR9tAAAAAAEMAAAM_24JjVmvQpKtlDshSR9tAADa_spkAAA%3D')/Attachments/$entity",
 "@odata.type"=>"#Microsoft.OutlookServices.ItemAttachment",
 "@odata.id"=>
  "https://outlook.office.com/api/v1.0/Users('framgia@en-japan.com')/Messages('AAMkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgBGAAAAAADkAZdAt2CKRb7qeDvUo2cCBwAM_24JjVmvQpKtlDshSR9tAAAAAAEMAAAM_24JjVmvQpKtlDshSR9tAADa_spkAAA=')/Attachments('AAMkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgBGAAAAAADkAZdAt2CKRb7qeDvUo2cCBwAM_24JjVmvQpKtlDshSR9tAAAAAAEMAAAM_24JjVmvQpKtlDshSR9tAADa_spkAAABEgAQAC0OcoIdL8lNgC520X2uWrg=')",
 "Id"=>"AAMkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgBGAAAAAADkAZdAt2CKRb7qeDvUo2cCBwAM_24JjVmvQpKtlDshSR9tAAAAAAEMAAAM_24JjVmvQpKtlDshSR9tAADa_spkAAABEgAQAC0OcoIdL8lNgC520X2uWrg=",
 "DateTimeLastModified"=>"2016-02-20T08:49:48Z",
 "Name"=>"[nhung]  mail  dùng chung cho company",
 "ContentType"=>"message/rfc822",
 "Size"=>18619,
 "IsInline"=>false,
 "Item@odata.context"=>
  "https://outlook.office.com/api/v1.0/$metadata#Me/Messages('AAMkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgBGAAAAAADkAZdAt2CKRb7qeDvUo2cCBwAM_24JjVmvQpKtlDshSR9tAAAAAAEMAAAM_24JjVmvQpKtlDshSR9tAADa_spkAAA%3D')/Attachments('AAMkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgBGAAAAAADkAZdAt2CKRb7qeDvUo2cCBwAM_24JjVmvQpKtlDshSR9tAAAAAAEMAAAM_24JjVmvQpKtlDshSR9tAADa_spkAAABEgAQAC0OcoIdL8lNgC520X2uWrg%3D')/Microsoft.OutlookServices.ItemAttachment/Item/$entity",
 "Item"=>
  {"@odata.type"=>"#Microsoft.OutlookServices.Message",
   "Id"=>nil,
   "DateTimeCreated"=>"2016-02-20T08:49:48Z",
   "DateTimeLastModified"=>"2016-02-20T08:49:48Z",
   "DateTimeReceived"=>"2016-02-20T08:49:42Z",
   "DateTimeSent"=>"2016-02-20T08:49:39Z",
   "HasAttachments"=>false,
   "Subject"=>"[nhung]  mail  dùng chung cho company",
   "Body"=>
    {"ContentType"=>"HTML",
     "Content"=>
      "<html><head>\r\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n</head>\r\n<body>\r\n<p>--&nbsp;cand_rep</p>\r\n<p>相川 真里和 --comp_name</p>\r\n<p>---&nbsp;comp_established</p>\r\n<p>---&nbsp;comp_address</p>\r\n<p>&nbsp;--&nbsp;comp_business</p>\r\n<p>2110036 --&nbsp;comp_employee</p>\r\n</body>\r\n</html>\r\n"},
   "Sender"=>{"EmailAddress"=>{"Name"=>"framgia　個別アカウント01", "Address"=>"framgia@en-japan.com"}},
   "From"=>{"EmailAddress"=>{"Name"=>"framgia　個別アカウント01", "Address"=>"framgia@en-japan.com"}},
   "ToRecipients"=>[{"EmailAddress"=>{"Name"=>"framgia　個別アカウント01", "Address"=>"framgia@en-japan.com"}}],
   "ConversationId"=>"AAQkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgAQAAjK6iM-EvcpiBrx4E7Ogl4=",
   "IsReadReceiptRequested"=>false,
   "IsRead"=>true,
   "IsDraft"=>false,
   "WebLink"=>"https://outlook.office365.com/owa/?ItemID=AAMkAGRiMjE2MTk3LTg3ZWUtNDg5ZC04YTMwLWYzNmU1MGY0Y2VlNgAAAA%3D%3D&exvsurl=1&viewmodel=ReadMessageItem"}}

那么，如何.eml使用 Office 365 REST API 获取此文件？有人可以帮助我吗？谢谢 ！

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1 回答 1

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Office 365 api 不会将您的项目附件作为 *.eml 文件提供。如果您需要将ItemAttachment作为 *.eml 文件，您必须自己构建它。以下是步骤：您确实可以访问此邮件的所有信息（请参阅新的Item条目），因此您可以创建MailMessage实例，然后调用此处建议的技术将MailMessage保存到 *.eml 文件如何保存MailMessage 对象作为 *.eml 或 *.msg 文件到磁盘

注意：您没有提到用于请求 Office365 api 的技术堆栈，我假设它是 C#。

于 2016-02-22T08:34:12.760 回答