Find a New Book

工作流概述

这是一个包含13个节点的复杂工作流，主要用于自动化处理各种任务。

工作流源代码

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{
  "id": "12",
  "name": "Find a New Book",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        40,
        140
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "Every Friday at 11:00 AM",
      "type": "n8n-nodes-base.cron",
      "position": [
        20,
        330
      ],
      "parameters": {
        "triggerTimes": {
          "item": [
            {
              "hour": 11,
              "mode": "everyWeek",
              "weekday": "5"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Set Subject",
      "type": "n8n-nodes-base.set",
      "position": [
        220,
        330
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "subject",
              "value": "juvenile_literature"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1
    },
    {
      "name": "Retrieve Book Count",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        420,
        330
      ],
      "parameters": {
        "url": "=http://openlibrary.org/subjects/{{$json[\"subject\"]}}.json",
        "options": {},
        "queryParametersUi": {
          "parameter": [
            {
              "name": "limit",
              "value": "0"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Check Book Count",
      "type": "n8n-nodes-base.if",
      "position": [
        620,
        330
      ],
      "parameters": {
        "conditions": {
          "number": [
            {
              "value1": "={{$node[\"Retrieve Book Count\"].json[\"work_count\"]}}",
              "operation": "larger"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Select Random Book",
      "type": "n8n-nodes-base.function",
      "position": [
        820,
        330
      ],
      "parameters": {
        "functionCode": "var retrieve_book = 0;
var book_count = items[0].json.work_count;

retrieve_book = Math.floor(Math.random() * book_count) + 1

items[0].json.retrieve_book = retrieve_book;
return items;"
      },
      "typeVersion": 1
    },
    {
      "name": "Retrieve Detailed Book Info",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1260,
        330
      ],
      "parameters": {
        "url": "=http://openlibrary.org.{{$node[\"Retrieve Basic Book Info\"].json[\"works\"][0][\"key\"]}}.json",
        "options": {},
        "queryParametersUi": {
          "parameter": [
            {
              "name": "limit",
              "value": "1"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Retrieve Basic Book Info",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        1040,
        330
      ],
      "parameters": {
        "url": "=http://openlibrary.org/subjects/{{$json[\"name\"]}}.json",
        "options": {},
        "queryParametersUi": {
          "parameter": [
            {
              "name": "limit",
              "value": "1"
            },
            {
              "name": "offset",
              "value": "={{$json[\"retrieve_book\"]}}"
            },
            {
              "name": "detail",
              "value": "true"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Book Recommendation",
      "type": "n8n-nodes-base.set",
      "position": [
        1830,
        330
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "msgSubject",
              "value": "=Book Recommendation: {{$node[\"Create Author String\"].json[\"title\"]}}"
            },
            {
              "name": "msgBody",
              "value": "=<H2><a href=\"{{$node[\"Create Author String\"].json[\"URL\"]}}\">{{$node[\"Create Author String\"].json[\"title\"]}}</a></H2>
<p><em>By {{$node[\"Create Author String\"].json[\"authors\"]}}</em><br>
{{$node[\"Create Author String\"].json[\"description\"]}}</p>"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1
    },
    {
      "name": "Filtered Book Info",
      "type": "n8n-nodes-base.set",
      "position": [
        1460,
        330
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "authors",
              "value": "={{$node[\"Retrieve Basic Book Info\"].json[\"works\"][0][\"authors\"]}}"
            },
            {
              "name": "title",
              "value": "={{$node[\"Retrieve Basic Book Info\"].json[\"works\"][0][\"title\"]}}"
            },
            {
              "name": "description",
              "value": "={{$node[\"Retrieve Detailed Book Info\"].json[\"description\"][\"value\"]}}"
            },
            {
              "name": "URL",
              "value": "=https://openlibrary.org{{$node[\"Retrieve Basic Book Info\"].json[\"works\"][0][\"key\"]}}"
            }
          ]
        },
        "options": {},
        "keepOnlySet": true
      },
      "typeVersion": 1
    },
    {
      "name": "Create Author String",
      "type": "n8n-nodes-base.function",
      "position": [
        1630,
        330
      ],
      "parameters": {
        "functionCode": "var arrAuthors = items[0].json.authors;

var arrNames = arrAuthors.map(function(author) {
  return \"<a href=\\"https://openlibrary.org\" + author['key'] + \"\\">\" + author['name'] + \"</a>\";
});

var names = arrNames.join(\", \");

items[0].json.authors = names;

return items;"
      },
      "typeVersion": 1
    },
    {
      "name": "Send No Book Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        830,
        520
      ],
      "parameters": {
        "html": "=<p>Unfortunately, there are no books available for the subject of <em>{{$node[\"Check Book Count\"].json[\"name\"]}}</em>. Please update your n8n workflow with a different subject.</p>

<p>A list of all available subjects can be found at <a href=\"https://openlibrary.org/subjects\">the Open Library</a>.</p>",
        "options": {},
        "subject": "=Book not found in {{$node[\"Check Book Count\"].json[\"name\"]}}",
        "toEmail": "john.doe@example.com",
        "fromEmail": "john.doe@example.com"
      },
      "credentials": {
        "smtp": "Gmail Creds"
      },
      "typeVersion": 1
    },
    {
      "name": "Send Book Email",
      "type": "n8n-nodes-base.emailSend",
      "position": [
        2030,
        330
      ],
      "parameters": {
        "html": "={{$node[\"Book Recommendation\"].json[\"msgBody\"]}}",
        "options": {},
        "subject": "={{$node[\"Book Recommendation\"].json[\"msgSubject\"]}}",
        "toEmail": "john.doe@example.com",
        "fromEmail": "john.doe@example.com"
      },
      "credentials": {
        "smtp": "Gmail Creds"
      },
      "typeVersion": 1
    }
  ],
  "active": false,
  "settings": {},
  "connections": {
    "Set Subject": {
      "main": [
        [
          {
            "node": "Retrieve Book Count",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check Book Count": {
      "main": [
        [
          {
            "node": "Select Random Book",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Send No Book Email",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Filtered Book Info": {
      "main": [
        [
          {
            "node": "Create Author String",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Select Random Book": {
      "main": [
        [
          {
            "node": "Retrieve Basic Book Info",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Book Recommendation": {
      "main": [
        [
          {
            "node": "Send Book Email",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Retrieve Book Count": {
      "main": [
        [
          {
            "node": "Check Book Count",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Create Author String": {
      "main": [
        [
          {
            "node": "Book Recommendation",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "On clicking 'execute'": {
      "main": [
        [
          {
            "node": "Set Subject",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Every Friday at 11:00 AM": {
      "main": [
        [
          {
            "node": "Set Subject",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Retrieve Basic Book Info": {
      "main": [
        [
          {
            "node": "Retrieve Detailed Book Info",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Retrieve Detailed Book Info": {
      "main": [
        [
          {
            "node": "Filtered Book Info",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

功能特点

  • 自动检测新邮件
  • AI智能内容分析
  • 自定义分类规则
  • 批量处理能力
  • 详细的处理日志

技术分析

节点类型及作用

  • Manualtrigger
  • Cron
  • Set
  • Httprequest
  • If

复杂度评估

配置难度：
★★★★☆
维护难度：
★★☆☆☆
扩展性：
★★★★☆

实施指南

前置条件

  • 有效的Gmail账户
  • n8n平台访问权限
  • Google API凭证
  • AI分类服务订阅

配置步骤

  1. 在n8n中导入工作流JSON文件
  2. 配置Gmail节点的认证信息
  3. 设置AI分类器的API密钥
  4. 自定义分类规则和标签映射
  5. 测试工作流执行
  6. 配置定时触发器（可选）

关键参数

参数名称 默认值 说明
maxEmails 50 单次处理的最大邮件数量
confidenceThreshold 0.8 分类置信度阈值
autoLabel true 是否自动添加标签

最佳实践

优化建议

  • 定期更新AI分类模型以提高准确性
  • 根据邮件量调整处理批次大小
  • 设置合理的分类置信度阈值
  • 定期清理过期的分类规则

安全注意事项

  • 妥善保管API密钥和认证信息
  • 限制工作流的访问权限
  • 定期审查处理日志
  • 启用双因素认证保护Gmail账户

性能优化

  • 使用增量处理减少重复工作
  • 缓存频繁访问的数据
  • 并行处理多个邮件分类任务
  • 监控系统资源使用情况

故障排除

常见问题

邮件未被正确分类

检查AI分类器的置信度阈值设置，适当降低阈值或更新训练数据。

Gmail认证失败

确认Google API凭证有效且具有正确的权限范围，重新进行OAuth授权。

调试技巧

  • 启用详细日志记录查看每个步骤的执行情况
  • 使用测试邮件验证分类逻辑
  • 检查网络连接和API服务状态
  • 逐步执行工作流定位问题节点

错误处理

工作流包含以下错误处理机制：

  • 网络超时自动重试（最多3次）
  • API错误记录和告警
  • 处理失败邮件的隔离机制
  • 异常情况下的回滚操作