Gmail的API适当的方式从Users.message资源获取电子邮件正文（文本或HTML）
我正在使用Users.messages.get端点来获取这个格式的gmail响应。
从上面的响应解码/解密邮件正文的正确方法是什么？
以我的情况为例，响应中的“parts”数组字段如下所示：
[ { "partId": "0.0", "mimeType": "text/plain", "filename": "", "headers": [ { "name": "Content-Type", "value": "text/plain; charset=\"UTF-8\"; format=flowed; delsp=yes" }, { "name": "Content-Transfer-Encoding", "value": "base64" } ], "body": { "size": 1628, "data": "R=" } }, { "partId": "0.1", "mimeType": "text/html", "filename": "", "headers": [ { "name": "Content-Type", "value": "text/html; charset=\"UTF-8\"" }, { "name": "Content-Transfer-Encoding", "value": "quoted-printable" } ], "body": { "size": 3112, "data": "PCEtLSBUaGlzIGNvbnRhaW5zIENTUyBpbmZvLCBzdGFydHMgdGhlIGJvZHksIGFuZCBpbnNlcnRzIHRoZSBHb29nbGUgbG9nbyBoZWFkZXIgLS0-DQo-IDwhLS0gVGhpcyBpcyB0aGUgYmVnaW5uaW5nIG9mIHRoZSBzdWJqZWN0IC0tPiA8L3NwYW4-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-LCB0aG9zZSBzY3JpcHQgc2hhcmluZyBzZXR0aW5ncyB3aWxsIGJlIHVwZGF0ZWQgdG8gbWF0Y2ggdGhvc2Ugb2YgdGhlIGRvY3VtZW50cyB0byB3aGljaCB0aGV5JiMzOTtyZSBhdHRhY2hlZC48L3A-DQoNCjxwPlRoZSBzaGFyaW5nIHNldHRpbmdzIHVwZGF0ZSBzaW1wbGlmaWVzIHNoYXJpbmcgc2V0dGluZ3MgZm9yIGRvY3VtZW50cyB3aXRoIGF0dGFjaGVkIEFwcHMgU2NyaXB0IHByb2plY3RzIGJ5IHRyZWF0aW5nIHRoZW0gbGlrZSBhIHNpbmdsZSBkb2N1bWVudC48L3A-DQoNCjxwPkFzIGEgcmVzdWx0IG9mIHRoZSBzaGFyaW5nIHNldHRpbmdzIHVwZGF0ZSwgYW5kIGFjY29yZGluZyB0byB0aGUgZG9jdW1lbnQgYWNjZXNzIGxldmVsLCBzb21lIHVzZXJzIG1heTo8L3A-DQoNCjx1bD4NCiAgPGxpPkdhaW4gb3IgbG9zZSBhY2Nlc3MgdG8gYWZmZWN0ZWQgcHJvamVjdHM8L2xpPg0KICA8bGk-Q2hhbmdlIHRoZWlyIGFjY2VzcyBsZXZlbHMgKGZvciBleGFtcGxlLCBvd25lciwgZWRpdG9yLCByZWFkZXIpPC9saT4NCjwvdWw-DQoNCjxwPjxzdHJvbmc-VGhpcyBjaGFuZ2Ugd2lsbCBub3QgYWZmZWN0IHNoYXJpbmcgc2V0dGluZ3MgZm9yIHRoZSBkb2N1bWVudHMuIE9ubHkgc2hhcmluZyBzZXR0aW5ncyBvZiBhdHRhY2hlZCBBcHBzIFNjcmlwdCBwcm9qZWN0cyB3aWxsIGJlIHVwZGF0ZWQuPC9zdHJvbmc-PC-DQogIDxsaT5JbiBEb2NzIG9yIFNoZWV0cywgY2xpY2sgPHN0cm9uZz5TaGFyZTwvc3Ryb25nPi48L2xpPg0KICA8bGk-SW4gRm9ybXMsIGNsaWNrIDxzdHJvbmc-QWRkIENvbGxhYm9yYXRvcjwvc3Ryb25nPi48L2xpPg0KICA8bGk-SW4gR29vZ2xlIERyaXZlLCBjbGljayA8c3Ryb25nPlNoYXJlPC9zdHJvbmc-LjwvbGk-DQo8L3VsPg0KDQo8cD5TaW5jZXJlbHksPC9wPg0KDQo8cD5UaGUgQXBwcyBTY3JpcHQgVGVhbTwvcD4NCjwhLS0gRmluYWxseSwgaW5jbHVkZSB0aGUgc3RhbmRhcmQgZm9vdGVyLiBUaGlzIGFsc28gZW5kcyB0aGUgYm9keSAtLT4NCjwhLS0gI2luY2x1ZGUgJy9na21zaWQvNjMyOTg2MycgLS0-DQoNCjwhLS0gRmluYWxseSwgaW5jbHVkZSB0aGUgVXNlciBzdGFuZGFyZCBmb290ZXIuIFRoaXMgYWxzbyBlbmRzIHRoZSBib2R5IC0tPg0KPGRpdiBzdHlsZT0iZm9udC1zaXplOiAxMHB4OyBjb2xvcjogIzY2NjY2NjsgcGFkZGluZy10b3A6IDhweDsgYm9yZGVyLXRvcC1zdHlsZTogc29saWQ7IGJvcmRlci10b3AtY29sb3I6ICNkY2RjZGM7IGJvcmRlci10b3Atd2lkdGg6IDFweCI-DQogIDxwPsKpIDIwMTcgIEdvb2dsZSBJbmMuIDE2MDAgQW1waGl0aGVhdHJlIFBhcmt3YXksIE1vdW50YWluIFZpZXcsIENBIDk0MDQzPC9wPg0KDQogIDxwPjxpPllvdSBoYXZlIHJlY2VpdmVkIHRoaXMgdXBkYXRlIGFzIGEgRyBTdWl0ZSBzZXJ2aWNlIGFubm91bmNlbWVudC48L2k-PC9wPg0KPC9kaXY-DQo8aW1nIGhlaWdodD0iMSIgd2lkdGg9IjMiIHNyYz0iaHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS9hcHBzZXJ2ZS9ta3QvaW1nL2xUUERhTG1XbHg1blNpbTF6OWp3RG1vTVYzSjRvMVZfcDhjPS5naWYiPg==" } } ] 而在上面，第二个元素（mimeType为text / html的partId 0.0）的主体看起来像这样：
"body": { "size": 3112, "data": "PCEtLSBUaGlzIGN...<trimmed for succintness>..cDhjPS5naWYiPg==" }
那么如何解码这些数据？ 标题如上部分（partId 0.1）
"headers": [ { "name": "Content-Type", "value": "text/html; charset=\"UTF-8\"" }, { "name": "Content-Transfer-Encoding", "value": "quoted-printable" } ]
所以内容传输编码是“报价打印”
相同的encryption/编码结果是我获取其他电子邮件时得到的结果。 不知道如何解码身体的数据（我不能在文档中的任何地方find它）。
我build立了一些东西来处理这个问题：
public string GetBodyWithRecursion(MessagePart p, string mimeType) { string Body = ""; if (p.parts.Parts != null) { foreach (MessagePart part in p.Parts) { Body = $"{Body} {GetBodyWithRecursion(part, mimeType)}"; } } else if (p.Body.Data != null && p.Body.AttachmentId == null && p.MimeType == mimeType) { Body = methodToConvertFrom64Url(p.Body.Data); } return Body; }
我首先用text / html调用它，如果这是空白的 – 然后用text / plain。 Incase HTML不可用，只有文本是。
希望这有助于，迈克