FCM主题名称是否有限制? [英] Are there any limitations for the FCM topics names?

问题描述

我正在尝试确定FCM主题名称是否存在任何限制.设法找到有关主题数的信息(无限制)，但没有类似主题名称或允许的字符的长度的信息.

I'm trying to find out if there are any limitations for the topic names for FCM. Managed to find info about the number of topics (no limitations), but nothing like length of topic name or allowed characters.

推荐答案

是的，不是所有字符都允许，主题名称中的单词之间不允许有空格.

Yes, not all characters are allowed, having space between words is not allowed in topic names.

从文档中

将消息发送到Firebase Cloud Messaging主题与将消息发送到单个设备或用户组非常相似.应用服务器在消息正文中使用诸如yourTopic之类的值设置主题密钥.开发人员可以选择与正则表达式匹配的任何主题名称:"[a-zA-Z0-9 -_.〜％] +"

sending messages to a Firebase Cloud Messaging topic is very similar to sending messages to an individual device or to a user group. The app server sets the topic key in the message body with a value like yourTopic. Developers can choose any topic name that matches the regular expression: "[a-zA-Z0-9-_.~%]+"

有关更多信息，请检查以下内容: https://firebase.google. com/docs/cloud-messaging/android/topic-messaging (构建请求部分)

for more info check this: https://firebase.google.com/docs/cloud-messaging/android/topic-messaging (build request section)

这篇关于FCM主题名称是否有限制?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！