有关更多背景信息，请参阅this thread。在弄清楚如何通过Office 365 Mail REST API从消息中检索ItemAttachments后，我现在遇到另一个问题：从ItemAttachments中检索FileAttachments。
API指南不包含此内容（据我所知）。当我检索ItemAttachment时，“HasAttachment”键的值为“true”，但我无法弄清楚如何检索它。
我（盲目地）尝试了以下URI：
/api/v1.0/me/messages/ {的MessageID} /附件/ {itemattachmentid}？$扩大= Microsoft.OutlookServices.ItemAttachment /项目/附件
/api/v1.0/me/messages/ {的MessageID} /附件/ {itemattachmentid}？$扩大= Microsoft.OutlookServices.ItemAttachment /项目/ Microsoft.OutlookServices.FileAttachment /文件
/api/v1.0/me/messages/ {的MessageID} /附件/ {itemattachmentid}？$扩大= Microsoft.OutlookServices.ItemAttachment /项目/文件
显然我不确定我在做什么：P
答案 0 :(得分：1)
抱歉，目前暂不支持。我们将把它放在我们的产品积压上。
答案 1 :(得分：0)
我们现在在API的Beta版本中支持此功能。您可以通过几种不同的方式从附加的消息或事件中获取附件。
通过扩展根消息
GET https://outlook.office.com/api/beta/me/messages/[message-id]?
$expand=Attachments($expand=Microsoft.OutlookServices.ItemAttachment/Item
($expand=Microsoft.OutlookServices.Event/Attachments))
注意：在上一个
$expand我使用Microsoft.OutlookServices.Event作为类型，但您应该更改此项以匹配附加项的实际类型。对于消息，它将是Microsoft.OutlookServices.Message。
示例响应（截断）
{
"Id": "AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L_AKqTR5R9JLmwxOUMAAAAAAEMAABk23L_AKqTR5R9JLmwxOUMAABfQr6jAAA=",
"CreatedDateTime": "2017-02-17T19:59:52Z",
"LastModifiedDateTime": "2017-02-17T19:59:53Z",
"ChangeKey": "CQAAABYAAABk23L+AKqTR5R9JLmwxOUMAABfVXy6",
"Categories": [],
"ReceivedDateTime": "2017-02-17T19:59:53Z",
"SentDateTime": "2017-02-17T19:59:43Z",
"HasAttachments": true,
"InternetMessageId": "<CO2PR00MB00852CEC51A3341250BD770BE05D0@CO2PR00MB0085.namprd00.prod.outlook.com>",
"Subject": "ItemAttachmentTest",
"BodyPreview": "Hello!",
"Importance": "Normal",
"ParentFolderId": "AQMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMgBjYTliODJhNTIALgAAA6Ii1CwFSf1Ai6F6MypimPkBAGTbcv4AqpNHlH0kubDE5QwAAAIBDAAAAA==",
"ConversationId": "AAQkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgAQAMMK8FY8x0SBhvgi8t6QP50=",
"ConversationIndex": "AdKJWFYcwwrwVjzHRIGG+CLy3pA/nQ==",
"IsDeliveryReceiptRequested": null,
"IsReadReceiptRequested": false,
"IsRead": false,
"IsDraft": false,
"WebLink": "https://outlook.office365.com/owa/?ItemID=AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L%2BAKqTR5R9JLmwxOUMAAAAAAEMAABk23L%2BAKqTR5R9JLmwxOUMAABfQr6jAAA%3D&exvsurl=1&viewModel=ReadMessageItem",
"InferenceClassification": "Focused",
"UnsubscribeData": [],
"UnsubscribeEnabled": false,
"Body": {
"ContentType": "HTML",
"Content": "Hello!"
},
"Sender": {
"EmailAddress": {
"Name": "Jason Johnston",
"Address": "jason@mod716595.onmicrosoft.com"
}
},
"From": {
"EmailAddress": {
"Name": "Jason Johnston",
"Address": "jason@mod716595.onmicrosoft.com"
}
},
"ToRecipients": [
{
"EmailAddress": {
"Name": "Adele Vance",
"Address": "AdeleV@MOD716595.onmicrosoft.com"
}
}
],
"CcRecipients": [],
"BccRecipients": [],
"ReplyTo": [],
"MentionsPreview": null,
"Flag": {
"FlagStatus": "NotFlagged"
},
"Attachments": [
{
"Id": "AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L_AKqTR5R9JLmwxOUMAAAAAAEMAABk23L_AKqTR5R9JLmwxOUMAABfQr6jAAABEgAQAE7xPNscnYFJmjqkGK0AjJc=",
"LastModifiedDateTime": "2017-02-17T19:59:35Z",
"Name": "Test appt with attachments!",
"ContentType": "message/rfc822",
"Size": 33358,
"IsInline": false,
"Item": {
"Id": null,
"CreatedDateTime": "2017-02-17T19:59:52Z",
"LastModifiedDateTime": "2017-02-17T19:59:52Z",
"OriginalStartTimeZone": "Eastern Standard Time",
"OriginalEndTimeZone": "Eastern Standard Time",
"iCalUId": "040000008200E00074C5B7101A82E00800000000D066332D2E89D201000000000000000010000000DAB182D13FA80846BA7983D8064016CC",
"ReminderMinutesBeforeStart": 0,
"IsReminderOn": false,
"HasAttachments": true,
"Subject": "Test appt with attachments!",
"Importance": "Normal",
"Sensitivity": "Normal",
"IsAllDay": false,
"IsCancelled": false,
"IsOrganizer": true,
"ResponseRequested": false,
"ShowAs": "Busy",
"Type": "SingleInstance",
"Body": {
"ContentType": "HTML",
"Content": "Hello!"
},
"Start": {
"DateTime": "2017-02-17T17:00:00.0000000Z",
"TimeZone": "UTC"
},
"End": {
"DateTime": "2017-02-17T17:30:00.0000000Z",
"TimeZone": "UTC"
},
"Location": {
"DisplayName": ""
},
"Organizer": {
"EmailAddress": {
"Name": "Jason Johnston",
"Address": "jason@mod716595.onmicrosoft.com"
}
},
"Attachments": [
{
"Id": "AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L_AKqTR5R9JLmwxOUMAAAAAAEMAABk23L_AKqTR5R9JLmwxOUMAABfQr6jAAACEgAQAE7xPNscnYFJmjqkGK0AjJcSABAAAucTv00RHEqhT3zxzdeBkg==",
"LastModifiedDateTime": "2017-02-17T17:53:20Z",
"Name": "OutlookSDKTest.log",
"ContentType": "application/octet-stream",
"Size": 5850,
"IsInline": false,
"ContentId": "EBEAA84020CB3C458DFFCF177291F0E8@namprd00.prod.outlook.com",
"ContentLocation": null,
"ContentBytes": "UmF3IElk..."
},
{
"Id": "AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L_AKqTR5R9JLmwxOUMAAAAAAEMAABk23L_AKqTR5R9JLmwxOUMAABfQr6jAAACEgAQAE7xPNscnYFJmjqkGK0AjJcSABAASt-usjVlxUufvpCupiLncA==",
"LastModifiedDateTime": "2017-02-17T17:11:28Z",
"Name": "OutlookWebAddIn1.xml",
"ContentType": "application/xml",
"Size": 12015,
"IsInline": false,
"ContentId": "49652CE21E82F74790BF2450DDA4B27E@namprd00.prod.outlook.com",
"ContentLocation": null,
"ContentBytes": "77u/PD94..."
}
]
}
}
]
}
通过附件ID
GET https://outlook.office.com/api/beta/me/messages/[message-id]/
attachments/[attach-id]?$expand=Microsoft.OutlookServices.ItemAttachment/Item
示例响应（截断）
{
"Id": "AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L_AKqTR5R9JLmwxOUMAAAAAAEMAABk23L_AKqTR5R9JLmwxOUMAABfQr6jAAABEgAQAE7xPNscnYFJmjqkGK0AjJc=",
"LastModifiedDateTime": "2017-02-17T19:59:35Z",
"Name": "Test appt with attachments!",
"ContentType": "message/rfc822",
"Size": 33358,
"IsInline": false,
"Item": {
"Id": null,
"CreatedDateTime": "2017-02-17T19:59:52Z",
"LastModifiedDateTime": "2017-02-17T19:59:52Z",
"OriginalStartTimeZone": "Eastern Standard Time",
"OriginalEndTimeZone": "Eastern Standard Time",
"iCalUId": "040000008200E00074C5B7101A82E00800000000D066332D2E89D201000000000000000010000000DAB182D13FA80846BA7983D8064016CC",
"ReminderMinutesBeforeStart": 0,
"IsReminderOn": false,
"HasAttachments": true,
"Subject": "Test appt with attachments!",
"Importance": "Normal",
"Sensitivity": "Normal",
"IsAllDay": false,
"IsCancelled": false,
"IsOrganizer": true,
"ResponseRequested": false,
"ShowAs": "Busy",
"Type": "SingleInstance",
"Body": {
"ContentType": "HTML",
"Content": "Hello!"
},
"Start": {
"DateTime": "2017-02-17T17:00:00.0000000Z",
"TimeZone": "UTC"
},
"End": {
"DateTime": "2017-02-17T17:30:00.0000000Z",
"TimeZone": "UTC"
},
"Location": {
"DisplayName": ""
},
"Organizer": {
"EmailAddress": {
"Name": "Jason Johnston",
"Address": "jason@mod716595.onmicrosoft.com"
}
},
"Attachments": [
{
"Id": "AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L_AKqTR5R9JLmwxOUMAAAAAAEMAABk23L_AKqTR5R9JLmwxOUMAABfQr6jAAACEgAQAE7xPNscnYFJmjqkGK0AjJcSABAAAucTv00RHEqhT3zxzdeBkg==",
"LastModifiedDateTime": "2017-02-17T17:53:20Z",
"Name": "OutlookSDKTest.log",
"ContentType": "application/octet-stream",
"Size": 5850,
"IsInline": false,
"ContentId": "EBEAA84020CB3C458DFFCF177291F0E8@namprd00.prod.outlook.com",
"ContentLocation": null,
"ContentBytes": "UmF3IElk..."
},
{
"Id": "AAMkAGZjYmY1ZTIwLWI1M2UtNGNkYS05MGQyLTQyMmNhOWI4MmE1MgBGAAAAAACiItQsBUn9QIuhejMqYpj5BwBk23L_AKqTR5R9JLmwxOUMAAAAAAEMAABk23L_AKqTR5R9JLmwxOUMAABfQr6jAAACEgAQAE7xPNscnYFJmjqkGK0AjJcSABAASt-usjVlxUufvpCupiLncA==",
"LastModifiedDateTime": "2017-02-17T17:11:28Z",
"Name": "OutlookWebAddIn1.xml",
"ContentType": "application/xml",
"Size": 12015,
"IsInline": false,
"ContentId": "49652CE21E82F74790BF2450DDA4B27E@namprd00.prod.outlook.com",
"ContentLocation": null,
"ContentBytes": "77u/PD94..."
}
]
}
}