{
  "id": "bbg-p0254-web-request-lifecycle-web-request",
  "title": "Browser URL Request Lifecycle",
  "chapter": "web-request-lifecycle",
  "batch": "03",
  "rank": 25,
  "sourcePage": 254,
  "sourcePointer": "p. 254",
  "status": "accepted",
  "reviewerStatus": "reviewed",
  "fidelityScore": 0.9,
  "canvas": {
    "width": 960,
    "height": 640
  },
  "fireworksTechGraph": {
    "style": "style-1-flat-icon",
    "diagramType": "sequence",
    "topologyNotes": [
      "source page render inspected",
      "extracted page text inspected",
      "source page render inspected",
      "preserve browser URL lifecycle: URL entry, cache lookup layers, DNS resolver/root/TLD/authoritative chain, IP cache, HTTP request, server response, and render",
      "omit source branding, raw IP/domain values, and copied dense callout boxes"
    ],
    "publicBoundary": [
      "original vector output",
      "no source pixels",
      "no source mark or long wording"
    ]
  },
  "callouts": [],
  "sourceReview": {
    "conceptAnchors": [
      "concept: URL entry",
      "concept: browser OS local ISP cache",
      "concept: DNS resolver root TLD authoritative",
      "concept: HTTP request",
      "concept: web server response"
    ],
    "labelSource": "curated",
    "semanticStatus": "reviewed"
  },
  "groups": [
    {
      "id": "browser",
      "label": "Browser",
      "x": 54,
      "y": 126,
      "w": 236,
      "h": 310
    },
    {
      "id": "dns",
      "label": "DNS resolution",
      "x": 340,
      "y": 126,
      "w": 280,
      "h": 310
    },
    {
      "id": "web",
      "label": "Request and response",
      "x": 672,
      "y": 126,
      "w": 236,
      "h": 310
    }
  ],
  "shapes": [
    {
      "id": "url",
      "kind": "rect",
      "label": "Enter URL",
      "detail": "address bar",
      "x": 92,
      "y": 158,
      "w": 126,
      "h": 58,
      "tone": "blue"
    },
    {
      "id": "cache",
      "kind": "cylinder",
      "label": "Cache layers",
      "detail": "browser OS ISP",
      "x": 92,
      "y": 278,
      "w": 126,
      "h": 82,
      "tone": "teal"
    },
    {
      "id": "resolver",
      "kind": "rect",
      "label": "Resolver",
      "detail": "recursive",
      "x": 378,
      "y": 158,
      "w": 126,
      "h": 58,
      "tone": "orange"
    },
    {
      "id": "root",
      "kind": "rect",
      "label": "Root TLD auth",
      "detail": "delegation",
      "x": 378,
      "y": 278,
      "w": 126,
      "h": 58,
      "tone": "purple"
    },
    {
      "id": "ip",
      "kind": "rect",
      "label": "IP address",
      "detail": "A/AAAA",
      "x": 378,
      "y": 386,
      "w": 126,
      "h": 58,
      "tone": "green"
    },
    {
      "id": "request",
      "kind": "gateway",
      "label": "HTTP request",
      "detail": "connect",
      "x": 720,
      "y": 176,
      "w": 126,
      "h": 80,
      "tone": "orange"
    },
    {
      "id": "server",
      "kind": "rect",
      "label": "Web server",
      "detail": "content",
      "x": 720,
      "y": 330,
      "w": 126,
      "h": 58,
      "tone": "green"
    }
  ],
  "connectors": [
    {
      "from": "url",
      "to": "cache",
      "label": "check",
      "flow": "main"
    },
    {
      "from": "cache",
      "to": "resolver",
      "label": "miss",
      "flow": "data"
    },
    {
      "from": "resolver",
      "to": "root",
      "label": "walk DNS",
      "flow": "main"
    },
    {
      "from": "root",
      "to": "ip",
      "label": "record",
      "flow": "data"
    },
    {
      "from": "ip",
      "to": "request",
      "label": "connect",
      "flow": "main"
    },
    {
      "from": "request",
      "to": "server",
      "label": "fetch",
      "flow": "main"
    },
    {
      "from": "server",
      "to": "cache",
      "label": "cache",
      "flow": "data",
      "dashed": true
    }
  ]
}