{
  "name": "Send a Website Screenshot to Telegram",
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1,
      "id": "send-website-screenshot-to-telegram-start"
    },
    {
      "id": "send-website-screenshot-to-telegram-capture",
      "name": "Capture the full page",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "method": "GET",
        "url": "https://api.screenshotbase.com/v1/take",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "sendQuery": true,
        "queryParameters": {
          "parameters": [
            {
              "name": "url",
              "value": "https://n8n.io"
            },
            {
              "name": "format",
              "value": "png"
            },
            {
              "name": "full_page",
              "value": "1"
            },
            {
              "name": "viewport_width",
              "value": "1024"
            },
            {
              "name": "device_scale_factor",
              "value": "1"
            },
            {
              "name": "upload",
              "value": "1"
            }
          ]
        },
        "options": {
          "timeout": 95000,
          "response": {
            "response": {
              "responseFormat": "json"
            }
          }
        }
      }
    },
    {
      "id": "send-website-screenshot-to-telegram-url-check",
      "name": "Check the Screenshotbase URL",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "  function validUrl(value) {\n    if (typeof value !== 'string' || /[\\s\\x00-\\x1f\\x7f\\\\]/.test(value) || /%(?![0-9a-f]{2})/i.test(value)) return false;\n    const match = /^https?:\\/\\/([^/?#]+)(?:[/?#].*)?$/i.exec(value);\n    if (!match || match[1].includes('@')) return false;\n    const authority = match[1];\n    let host, port;\n    if (authority.startsWith('[')) {\n      const parts = /^\\[([0-9a-f:]+)\\](?::(\\d+))?$/i.exec(authority);\n      if (!parts) return false;\n      host = parts[1]; port = parts[2];\n      const halves = host.split('::');\n      if (halves.length > 2) return false;\n      const groups = halves.flatMap(part => part ? part.split(':') : []);\n      if (groups.some(group => !/^[0-9a-f]{1,4}$/i.test(group))) return false;\n      if (halves.length === 1 ? groups.length !== 8 : groups.length >= 8) return false;\n    } else {\n      const parts = /^([^:]+)(?::(\\d+))?$/.exec(authority);\n      if (!parts) return false;\n      host = parts[1]; port = parts[2];\n      if (host.length > 253) return false;\n      const labels = host.replace(/\\.$/, '').split('.');\n      if (!labels.every(label => label.length > 0 && label.length <= 63 && /^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/i.test(label))) return false;\n      if (labels.every(label => /^\\d+$/.test(label)) && (labels.length !== 4 || labels.some(label => Number(label) > 255))) return false;\n    }\n    return port === undefined || (port.length <= 5 && Number(port) <= 65535);\n  }\n\nconst url=$input.first().json.url;if(!validUrl(url)||!/^https:\\/\\/(?:cache|cdn)\\.screenshotbase\\.com(?:[/?#]|$)/i.test(url))throw Error('Invalid Screenshotbase CDN URL');return [{json:{url}}];"
      }
    },
    {
      "id": "send-website-screenshot-to-telegram-inspect",
      "name": "Read screenshot header",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "method": "GET",
        "url": "={{ $json.url }}",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Range",
              "value": "bytes=0-23"
            }
          ]
        },
        "options": {
          "response": {
            "response": {
              "responseFormat": "file",
              "outputPropertyName": "data"
            }
          }
        }
      }
    },
    {
      "id": "send-website-screenshot-to-telegram-check",
      "name": "Validate the screenshot URL",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "  function validUrl(value) {\n    if (typeof value !== 'string' || /[\\s\\x00-\\x1f\\x7f\\\\]/.test(value) || /%(?![0-9a-f]{2})/i.test(value)) return false;\n    const match = /^https?:\\/\\/([^/?#]+)(?:[/?#].*)?$/i.exec(value);\n    if (!match || match[1].includes('@')) return false;\n    const authority = match[1];\n    let host, port;\n    if (authority.startsWith('[')) {\n      const parts = /^\\[([0-9a-f:]+)\\](?::(\\d+))?$/i.exec(authority);\n      if (!parts) return false;\n      host = parts[1]; port = parts[2];\n      const halves = host.split('::');\n      if (halves.length > 2) return false;\n      const groups = halves.flatMap(part => part ? part.split(':') : []);\n      if (groups.some(group => !/^[0-9a-f]{1,4}$/i.test(group))) return false;\n      if (halves.length === 1 ? groups.length !== 8 : groups.length >= 8) return false;\n    } else {\n      const parts = /^([^:]+)(?::(\\d+))?$/.exec(authority);\n      if (!parts) return false;\n      host = parts[1]; port = parts[2];\n      if (host.length > 253) return false;\n      const labels = host.replace(/\\.$/, '').split('.');\n      if (!labels.every(label => label.length > 0 && label.length <= 63 && /^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/i.test(label))) return false;\n      if (labels.every(label => /^\\d+$/.test(label)) && (labels.length !== 4 || labels.some(label => Number(label) > 255))) return false;\n    }\n    return port === undefined || (port.length <= 5 && Number(port) <= 65535);\n  }\n\nfunction checkPng(bytes){if(!bytes||bytes.length<24)throw Error('Screenshot PNG header is incomplete');const sig=[137,80,78,71,13,10,26,10];if(sig.some((x,i)=>bytes[i]!==x)||bytes[8]!==0||bytes[9]!==0||bytes[10]!==0||bytes[11]!==13||String.fromCharCode(...bytes.slice(12,16))!=='IHDR')throw Error('Screenshot is not a PNG with an IHDR header');const u=i=>bytes[i]*16777216+bytes[i+1]*65536+bytes[i+2]*256+bytes[i+3],width=u(16),height=u(20);if(width!==1024||height<1||height>=20000)throw Error('Screenshot dimensions may indicate truncation or scaling');return true;}\n\nconst url=$('Check the Screenshotbase URL').first().json.url;if(!validUrl(url)||!/^https:\\/\\/(?:cache|cdn)\\.screenshotbase\\.com(?:[/?#]|$)/i.test(url))throw Error('Invalid Screenshotbase CDN URL');const bytes=await this.helpers.getBinaryDataBuffer(0,'data');checkPng(bytes);return [{json:{photo:url}}];"
      }
    },
    {
      "name": "Telegram",
      "type": "n8n-nodes-base.telegram",
      "position": [
        650,
        300
      ],
      "parameters": {
        "resource": "message",
        "operation": "sendPhoto",
        "chatId": "YOUR_TELEGRAM_CHAT_ID",
        "binaryData": false,
        "file": "={{ $json.photo }}",
        "replyMarkup": "none",
        "additionalFields": {}
      },
      "typeVersion": 1,
      "id": "send-website-screenshot-to-telegram-send"
    }
  ],
  "active": false,
  "settings": {},
  "connections": {
    "On clicking 'execute'": {
      "main": [
        [
          {
            "node": "Capture the full page",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Capture the full page": {
      "main": [
        [
          {
            "node": "Check the Screenshotbase URL",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check the Screenshotbase URL": {
      "main": [
        [
          {
            "node": "Read screenshot header",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Read screenshot header": {
      "main": [
        [
          {
            "node": "Validate the screenshot URL",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Validate the screenshot URL": {
      "main": [
        [
          {
            "node": "Telegram",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "pinData": {}
}