前言#
有很多方式来同步博客内容到 Mastodon，比如我曾经就是使用的 GitHub Actions 在构建时就同步了。但我们不是已经部署了一个 n8n 吗？就把同步流程搬到 n8n 上了。
n8n 是一个强大的自动化工具，可以用来备份 Mastodon 嘟文——《 n8n 玩法之备份 Mastodon 嘟文 》。今天我们来看看如何使用 n8n 将博客内容同步到 Mastodon。
流程简介#
中间会引入
Sink
短链接服务，Sink 也是判断博客文章是否是新发布的依据。用 Sink 来生成 Mastodon 嘟文的短链接，创建博客文章到 Mastodon 嘟文的联系，把一篇博客文章和一条嘟文对应起来，建立双向链接。见文末评论区的 Discuss on Mastodon。Hugo 的 Comments.html 模板中的代码：
<a href="https://s.e5n.cc/{{ .Slug }}">Mastodon</a>
比如：
文章的 URL 是： https://www.eallion.com/n8n-sync-blog-to-mastodon
文章的 Slug 是： n8n-sync-blog-to-mastodon
Sink 短链接就是： Sink 域名 + Slug：
https://sink.to/n8n-sync-blog-to-mastodon
PS：n8n 中 Slug 提取代码：
const path = originalLink.split('/').slice(3).join('/'); // 移除协议和域名部分
const slug = path.replace(/\/$/, ''); // 去除末尾的斜杠
具体流程#
- 触发器：监测 GitHub 博客仓库的 Push
- 触发后睡眠 5 分钟，等待 CI/CD 构建和 CDN 刷新，根据自己的时间调整
- 获取博客 RSS 的内容
- 处理 RSS 最新的一条内容
- 检测最新内容的 Sink 短链接是否存在，
404表示这篇文章还没有在 Sink 创建过，即这篇文章是新发布的 - 如果
404就发布到 Mastodon - 发布后创建 Sink 短链接
Mastodon 创建应用#
在 Mastodon 实例中创建一个应用：
应用名称： 随便填应用网站：https://n8n.example.com/rest/oauth2-credential/callback重定向 URI：https://n8n.example.com/rest/oauth2-credential/callback权限范围：write:statuses、可选write:media
n8n 凭证#
在 n8n 面板中，点右上角的三角形，选择 Create Credentials，创建一个 Mastodon 凭证。
注意：Mastodon 不能用官方的，需要选择 OAuth2 API
n8n 流程#
复制这个流程代码，保存为 .json 文件，然后在 n8n 中导入。
{
"name": "SinkBlogtoMastodon",
"nodes": [
{
"parameters": {
"owner": {
"__rl": true,
"value": "gh_username",
"mode": "name"
},
"repository": {
"__rl": true,
"value": "gh_blog_repo",
"mode": "name"
},
"events": [
"push"
],
"options": {}
},
"type": "n8n-nodes-base.githubTrigger",
"typeVersion": 1,
"position": [
-240,
-420
],
"id": "6ea99614-9c0f-49a7-88db-f552dbac7952",
"name": "Github Trigger",
"webhookId": "b33dca07-0939-4107-a315-231bfab13df3",
"credentials": {
"githubApi": {
"id": "8qzxqmikk9WEzTtg",
"name": "GitHub account"
}
}
},
{
"parameters": {
"url": "https://my.blog/rss",
"options": {}
},
"type": "n8n-nodes-base.rssFeedRead",
"typeVersion": 1.1,
"position": [
380,
-120
],
"id": "b48c23ba-ef9a-4c2a-8d0d-e73c0de35ec1",
"name": "BlogRSS",
"alwaysOutputData": true,
"executeOnce": true,
"retryOnFail": true,
"onError": "continueErrorOutput"
},
{
"parameters": {
"url": "={{ $json.newLink }}",
"options": {
"response": {
"response": {
"fullResponse": true,
"neverError": true
}
}
}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
900,
-120
],
"id": "9fe05f54-5107-40e4-b979-2e22e029d4cc",
"name": "FetchNewURL",
"alwaysOutputData": true,
"executeOnce": true,
"retryOnFail": true,
"notesInFlow": true,
"onError": "continueErrorOutput",
"notes": "Fetch New URL"
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "loose",
"version": 2
},
"conditions": [
{
"id": "84ba6f92-1023-4902-997c-c6e3efd6ea38",
"leftValue": "={{ $json.statusCode }}",
"rightValue": "404",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "and"
},
"looseTypeValidation": true,
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2.2,
"position": [
1160,
-120
],
"id": "fdf2464c-12c2-4ea8-85f5-f38ad9d0ff2a",
"name": "CheckSlugExists",
"executeOnce": true,
"retryOnFail": true,
"notesInFlow": true,
"onError": "continueErrorOutput",
"notes": "Check if 404"
},
{
"parameters": {
"method": "POST",
"url": "https://sink.to/api/link/create",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "authorization",
"value": "Bearer ehJy..."
},
{
"name": "content-type",
"value": "application/json"
}
]
},
"sendBody": true,
"bodyParameters": {
"parameters": [
{
"name": "url",
"value": "={{ $json.body.uri }}"
},
{
"name": "slug",
"value": "={{ $('ConvertBlogPost').item.json.slug }}"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1680,
-120
],
"id": "0b8ed4aa-ddba-4d1e-af96-24c39acb0b30",
"name": "SinkAPICreate",
"executeOnce": true,
"retryOnFail": true,
"notesInFlow": true,
"notes": "Shorter the link with Sink"
},
{
"parameters": {
"jsCode": "// 获取 RSS 节点的第一条数据的 link\nconst originalTitle = $input.all()[0].json.title;\nconst originalLink = $input.all()[0].json.link;\nconst originalContent = $input.all()[0].json.content;\n\n// 替换域名为 s.e5n.cc\nconst newLink = originalLink.replace('www.eallion.com', 's.e5n.cc');\n\n// 提取 slug（例如 nas-building）\n// 使用字符串方法提取路径部分\nconst path = originalLink.split('/').slice(3).join('/'); // 移除协议和域名部分\nconst slug = path.replace(/\\/$/, ''); // 去除末尾的斜杠\n\n// 返回 newLink、originalLink 和 slug\nreturn [\n {\n json: {\n originalTitle,\n newLink,\n originalLink,\n slug,\n originalContent,\n },\n },\n];"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
640,
-120
],
"id": "2750e5ce-1a04-4cfd-bc53-27cd0aff166a",
"name": "ConvertBlogPost",
"executeOnce": true,
"retryOnFail": true,
"onError": "continueErrorOutput"
},
{
"parameters": {
"method": "POST",
"url": "https://mastodon.instance/api/v1/statuses",
"authentication": "genericCredentialType",
"genericAuthType": "oAuth2Api",
"sendBody": true,
"bodyParameters": {
"parameters": [
{
"name": "status",
"value": "=博客发布新文章：《{{ $('ConvertBlogPost').item.json.originalTitle }}》\n{{ $('ConvertBlogPost').item.json.originalLink }}\n{{ $('ConvertBlogPost').item.json.originalContent }}"
},
{
"name": "visibility",
"value": "public"
}
]
},
"options": {
"response": {
"response": {
"fullResponse": true,
"neverError": true
}
}
}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1420,
-120
],
"id": "6f734551-c959-41e2-b05e-8691e76a265d",
"name": "POSTtoMastodon",
"notesInFlow": true,
"executeOnce": true,
"retryOnFail": true,
"alwaysOutputData": true,
"credentials": {
"oAuth2Api": {
"id": "GqNI5NcHBoCsIywV",
"name": "Mastodon e5n"
}
},
"onError": "continueErrorOutput",
"notes": "POST to Mastodon statuses"
},
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
-200,
160
],
"id": "f38321ef-5d2b-46b6-ad80-bb9ddda155eb",
"name": "手动（测试用）",
"disabled": true
},
{
"parameters": {
"unit": "minutes"
},
"type": "n8n-nodes-base.wait",
"typeVersion": 1.1,
"position": [
40,
-420
],
"id": "4326ba6f-794e-420f-a961-998973c16989",
"name": "Wait",
"webhookId": "ad0849a8-63c0-4b84-97d8-86bfe59e3dab",
"alwaysOutputData": true,
"executeOnce": true,
"retryOnFail": true,
"notesInFlow": false
}
],
"pinData": {},
"connections": {
"Github Trigger": {
"main": [
[
{
"node": "Wait",
"type": "main",
"index": 0
}
]
]
},
"BlogRSS": {
"main": [
[
{
"node": "ConvertBlogPost",
"type": "main",
"index": 0
}
]
]
},
"FetchNewURL": {
"main": [
[
{
"node": "CheckSlugExists",
"type": "main",
"index": 0
}
]
]
},
"CheckSlugExists": {
"main": [
[
{
"node": "POSTtoMastodon",
"type": "main",
"index": 0
}
],
[],
[]
]
},
"ConvertBlogPost": {
"main": [
[
{
"node": "FetchNewURL",
"type": "main",
"index": 0
}
]
]
},
"POSTtoMastodon": {
"main": [
[
{
"node": "SinkAPICreate",
"type": "main",
"index": 0
}
]
]
},
"手动（测试用）": {
"main": [
[
{
"node": "BlogRSS",
"type": "main",
"index": 0
}
]
]
},
"Wait": {
"main": [
[
{
"node": "BlogRSS",
"type": "main",
"index": 0
}
]
]
}
},
"active": true,
"settings": {
"executionOrder": "v1"
},
"versionId": "f1aa189b-645b-44e1-906a-fdee06face62",
"meta": {
"templateCredsSetupCompleted": true,
"instanceId": "f9ad6c4f03ea7c2c4f16a8dda8e47b847dcd27971aa32eadc1b11bbddddddddd"
},
"id": "KzVqqCxAGWaVZAmG",
"tags": []
}