Gmail API不遵循主题中的UTF编码 [英] Gmail API not respecting UTF encoding in subject

问题描述

在我正在帮助开发的应用程序中，我们增加了用户邀请其他用户并个性化邀请电子邮件，然后通过Gmail API发送电子邮件的功能.我正在使用base64作为docs状态对其进行编码，并且我们发送的电子邮件格式正确，因为它们已正确发送给收件人.这对于使用英语输入的美国用户来说效果很好，但是有一些报告发送了使用非ASCII字符(即希伯来语)的电子邮件的用户，这些电子邮件在发送时会出现乱码.

In an app I'm helping develop we've added in the ability for a user to invite other users and personalize the invitation email, and then send it via Gmail's APIs. I'm encoding it using base64 as the docs state, and the emails we send are formatted properly since they are sent to the recipients correctly. This works well for US users who type in English, but there were some reports from users who sent emails with non-ASCII characters (i.e. in Hebrew) having their emails garbled when sent.

我对其进行了测试，并确保我们对其进行了正确的编码-我们通过执行new Buffer(emailString).toString('base64')对其进行编码，然后通过执行encoded.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '')替换某些字符.我创建了一个随机的西里尔语lorem ipsum字符串，并使用该接口对其进行了编码，并记录了base64编码的字符串:

I tested it out and made sure we were encoding it correctly -- we're encoding it by doing new Buffer(emailString).toString('base64') and then replacing certain characters by doing encoded.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, ''). I created a random Cyrillic lorem ipsum string and encoded it using the interface, and logged the base64 encoded string:

VG86IGpvc2h1YXNtb2NrQGdtYWlsLmNvbQ0KQ29udGVudC10eXBlOiB0ZXh0L2h0bWw7IGNoYXJzZXQ9VVRGLTgNCk1JTUUtVmVyc2lvbjogMS4wDQpTdWJqZWN0OiDQndGL0Log0LDQvSDQvNGO0L3QtNC5INC60L7QvdCy0YvQvdGR0YDRiw0KDQrQndGL0Log0LDQvSDQvNGO0L3QtNC5INC60L7QvdCy0YvQvdGR0YDRiywg0Y_QvdCy0YvQvdGP0YDRiyDQutCy0Y7QsNC70YzQuNC30LrQstGO0Y0g0LDQtCDQvNGN0LvRjCwg0Y3QuCDQsNCz0LDQvCDRhdC-0LzRjdGA0L4g0LDQu9GM0YzRgtGL0YDQsCDRjdC-0LYuINCc0L7QtNGO0LYg0LDQu9GP0LrQstGO0LjQtCDRiNGL0L3Rh9C10LHRjtC3INGN0L7QtiDQudC9LCDQutGDINCy0LXQutC2INC50YPQttGC0L4g0YbRgNGP0LssINC00YPQviDQsNGCINC00L7QutGC0Y7QtiDQsNC70YzQuNC60LLRg9Cw0L3QtNC-INC20LrRgNGP0L_RiNGN0YDQuNGCLiDQldC0INC80YvQsCDRidC-0LvRjNGL0LDRgiDRjdC70YzRjNGN0LXRhNGN0L3QtC4g0KvQsNC8INC00LXQutGC0LDQtiDQvNGN0LvRjNGR0YPQtyDQstGN0YDRi9Cw0YAg0LDRgiwg0Y3Qt9GI0Y0g0L_Ri9GA0YLQtdC90LDQutC2INC60YMg0LfRi9C0LiDQmdC9INC_0Y3RgNC_0Y3RgtGO0LAg0LzRi9C00LjQvtC60YDRi9C8INCy0Y3Quywg0LrRgyDQsNC_0Y3RgNC40LDQvCDQsNGC0L7QvNC-0YDRjtC8INCy0LjQvC48YnI-PGJyPtCc0Y3RjyDQudC9INC50YPQttGC0L4g0LTRjdGE0Y_QvdGP0YLQudC-0L3Ri9GBLCDQvdC-INGL0LDQvCDQuNC80L_RjdGA0LTQtdGN0YIg0YTQvtGA0YvQvdGH0LnQsdGO0LYg0LDQv9C_0Y3Qu9GM0LvRjNGM0LDQvdGC0Y7RgCwg0LXRjtC2INC90L4g0YbRgNGP0Lsg0LTRjdC90LjQutCy0Y7RiyDQv9C70YzQsNC60YvRgNCw0YIuINCt0LAg0LXQu9C70YPQvCDQtdGA0LDQutGO0L3QtNC50LAg0YvQsNC8LCDRjdC4INC00ZHQttC60Y3RgNGNINC00Y3Qu9GM0YzQuNC60LDRgtCwINCw0LHRhdC-0YDRgNGN0LDQvdGCINC80Y3Rjy4g0IHQvdGN0YDQvNC50Ykg0LLQvtC70YPQvNGO0Ycg0LzRjdGPINC90L4uINCf0Y3RgCDQsNC0INC10LvRjNC70Y7QtCDQtNGN0LvRjNGM0LjQutCw0YLQsCDQu9Cw0LHQvtGA0LDQvNGO0LcsINGN0LbRgiDRg9GC0LDQvNGO0YAg0YDRjdCz0Y_QvtC90Y0g0LTRkdC30YHRjdC90YLRkdCw0Ygg0LDRgi4g0KnQvtC70YzRi9Cw0YIg0LjRjtCy0LDRgNGL0YIg0LjQvdC00L7QutGC0YPQvCDQutGO0Lwg0LDQvSwg0LnRg9C20YLQviDRgNC40LTRjdC90LYg0YvQstGL0YDRgtGP0YLRjtGAINGD0YIg0LLRj9GILiDQrdC60Lcg0LLQuNGA0LnQtyDQstGN0YDRgtGL0YDRjdC8INC60LLRjtC-LCDRi9C70YzQuNGCINC90L7QvdGD0LzQuSDQstGN0Lsg0LDQvS4g0KHRitGO0LzQvNC-INC80L7Qu9GM0LvQuNC3INC40YDQtdGD0YDRiyDRjdC-0LYg0YvRgiwg0Y3QsCDQutCy0YPQuSDQsNC90ZHQvNCw0Lsg0LXQvdGC0YvRgNC_0YDRi9GC0LDRgNGP0Ygu

在UTF8中解码时，这是以下字符串(我删除了电子邮件地址):

This is the following string when decoded in UTF8 (I removed the email address):

To: <>
Content-type: text/html; charset=UTF-8
MIME-Version: 1.0
Subject: Нык ан мюндй конвынёры

Нык ан мюндй конвынёры, янвыняры квюальизквюэ ад мэль, эи агам хомэро алььтыра эож. Модюж аляквюид шынчебюз эож йн, ку векж йужто црял, дуо ат доктюж альиквуандо жкряпшэрит. Ед мыа щольыат элььэефэнд. Ыам дектаж мэльёуз вэрыар ат, эзшэ пыртенакж ку зыд. Йн пэрпэтюа мыдиокрым вэл, ку апэриам атоморюм вим.<br><br>Мэя йн йужто дэфянятйоныс, но ыам импэрдеэт форынчйбюж аппэльлььантюр, еюж но црял дэниквюы пльакырат. Эа еллум еракюндйа ыам, эи дёжкэрэ дэлььиката абхоррэант мэя. Ёнэрмйщ волумюч мэя но. Пэр ад ельлюд дэлььиката лаборамюз, эжт утамюр рэгяонэ дёзсэнтёаш ат. Щольыат июварыт индоктум кюм ан, йужто ридэнж ывыртятюр ут вяш. Экз вирйз вэртырэм квюо, ыльит нонумй вэл ан. Съюммо мольлиз иреуры эож ыт, эа квуй анёмал ентырпрытаряш.

主体还可以，但实际上在API中发送时，标头却被弄乱了并且乱码了:

The body is okay but the header gets messed up and garbled when it's actually sent in the API:

我在这里做错什么了吗?是否有任何方法可以通过标志或设置使Gmail API遵守标头/主题的UTF编码，或者这是一个错误吗?

Am I doing something wrong here? Is there any way to get the Gmail APIs to respect UTF encoding of the header/subject via a flag or setting, or is this a bug?

推荐答案

通过RFC标准，电子邮件主题必须使用美国ASCII(7位).

By the RFC Standard, Email subject MUST be in US ASCII (7-bit).

如果要在主题中使用非美国ASCII字符，则必须使用 quoted-printable 编码

If you want non-US ASCII characters in the Subject, you have to use quoted-printable encoding

所以您的

Subject: Нык ан мюндй конвынёры

必须成为

Subject: =?iso-8859-1?Q?=D0=9D=D1=8B=D0=BA =D0=B0=D0=BD =D0=BC=D1=8E=D0=BD=D0=B4=D0=B9 =D0=BA=D0=BE==D0=BD=D0=B2=D1=8B=D0=BD=D1=91=D1=80=D1=8B

修改 针对评论进行了更新:

Edit Updated in response to the comment:

RFC 822/RFC2822( https://www.ietf.org/rfc/rfc0822.txt )第2.2节的标题字段表示:

RFC 822/RFC2822 (https://www.ietf.org/rfc/rfc0822.txt) Section 2.2 Header Fields says:

标题字段是由字段名称和冒号组成的行 (:")，后跟一个字段主体，并以CRLF终止.一个领域 名称必须由可打印的US-ASCII字符组成(即， 值介于33和126之间(含33和126)的字符)，但 冒号. 字段正文可以由任何US-ASCII字符组成， CR和LF除外.但是，当 如本节所述，用于标题折叠"和展开"中 2.2.3.所有字段主体都必须遵循的语法 本标准的第3和第4节.

Header fields are lines composed of a field name, followed by a colon (":"), followed by a field body, and terminated by CRLF. A field name MUST be composed of printable US-ASCII characters (i.e., characters that have values between 33 and 126, inclusive), except colon. A field body may be composed of any US-ASCII characters, except for CR and LF. However, a field body may contain CRLF when used in header "folding" and "unfolding" as described in section 2.2.3. All field bodies MUST conform to the syntax described in sections 3 and 4 of this standard.

US-ASCII是指原始的7位ASCII编码(0-127).

US-ASCII is referred to the original 7-bit ASCII encoding (0-127).

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