JSON Schema Viewer

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\n \n\n","fileType",1,"parentId","7b160add-a7c1-4fe8-9093-0899e87d9405","createdAt",["D",1747594515472],"branchVersion",27,"label",[52,39],"frontend",{"_33":121,"_13":122,"_37":123,"_44":-5,"_35":36,"_48":124,"_63":64,"_46":125,"_17":80,"_42":104,"_40":-5,"_69":70,"_50":-5,"_72":126,"_18":127},{"_33":101,"_13":52,"_37":45,"_44":-5,"_35":36,"_48":102,"_63":64,"_46":103,"_17":80,"_42":104,"_40":-5,"_69":70,"_50":-5,"_72":105,"_18":106},{"_33":93,"_13":94,"_37":95,"_44":-5,"_35":36,"_48":96,"_63":64,"_46":97,"_17":80,"_42":24,"_40":98,"_69":70,"_50":-5,"_72":99,"_18":100},{"_33":84,"_13":85,"_37":86,"_44":-5,"_35":36,"_48":87,"_63":64,"_46":88,"_17":89,"_42":24,"_40":90,"_69":70,"_50":-5,"_72":91,"_18":92},{"_33":75,"_13":76,"_37":77,"_44":-5,"_35":36,"_48":78,"_63":64,"_46":79,"_17":80,"_42":24,"_40":81,"_69":70,"_50":-5,"_72":82,"_18":83},{"_33":59,"_13":60,"_37":61,"_44":-5,"_35":36,"_48":62,"_63":64,"_46":65,"_17":66,"_42":67,"_40":68,"_69":70,"_50":71,"_72":73,"_18":74},"9554f674-3529-11f0-a33f-9e149126039e","index.ts","6a5bfa8c-3419-11f0-9fb0-9e149126039e",33,"latest",true,["D",1747711316373],4,"http","// Re-export the backend app\nexport { default } from \"./backend/index.ts\";\n\n","deleted",false,"json-schema-viewer","children",[],[60],"5e7311ae-3529-11f0-99ee-9e149126039e","deno.json","5e73128a-3529-11f0-99ee-9e149126039e",30,["D",1747711224261],0,"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/348900b8b79f4a434cab4c74b3bc8d4d2fa8ee74/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": false,\n \"types\": [\n \"https://www.val.town/types/valtown.d.ts\"\n ],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"files\": {\n \"include\": [\n \"deno:/https/esm.town/**/*\"\n ]\n },\n \"rules\": {\n \"exclude\": [\n \"no-explicit-any\"\n ]\n }\n },\n \"node_modules_dir\": false,\n \"experimental\": {\n \"unstable-node-globals\": true,\n \"unstable-temporal\": true,\n \"unstable-worker-options\": true,\n \"unstable-sloppy-imports\": true\n }\n}",[],[76],"a82d1670-3419-11f0-8c51-9e149126039e","README.md","2e7b8e84-3418-11f0-913e-9e149126039e",28,["D",1747594524878],6,"# JSON Schema Viewer\n\nA minimal web application that renders JSON Schema files using the `material-ui-json-schema-viewer` package.\n\n## Usage\n\nVisit the application with a URL parameter pointing to a JSON Schema file:\n\n```\nhttps://json-schema-viewer.val.run/?url=\n```\n\nFor example:\n```\nhttps://json-schema-viewer.val.run/?url=https://creativeprojects.github.io/resticprofile/jsonschema/config.json\n```\n\n## Features\n\n- Fetches and displays JSON Schema from any URL\n- Renders the schema using the Material UI JSON Schema Viewer component\n- Supports all JSON Schema features including nested objects, arrays, and references\n- Minimal UI with no distractions - only shows the schema viewer\n- Handles errors gracefully\n- Material Design styling\n\n## Implementation Details\n\n- Built with React 18.2.0 and Hono 3.11.7\n- Uses the `material-ui-json-schema-viewer` package for schema rendering\n- Uses Material UI v4 for styling and components\n- Follows the recommended Val Town project structure\n- Clean separation of backend and frontend code\n\n## Project Structure\n\n- `/index.ts` - Entry point that re-exports the backend\n- `/backend/index.ts` - Hono application with API endpoints and route handlers\n- `/frontend/index.html` - HTML template\n- `/frontend/app.jsx` - React application with Material UI components",[],[85],"5e6de030-3529-11f0-924c-9e149126039e",".vtignore","5e6de10c-3529-11f0-924c-9e149126039e",29,["D",1747711224260],".git\n.vscode\n.cursorrules\n.DS_Store\nnode_modules\nvendor",[],[94],"298420bc-3418-11f0-9060-9e149126039e",2,["D",1747593882881],"directory",[107,108],[52],{"_33":112,"_13":113,"_37":114,"_44":45,"_35":36,"_48":115,"_63":64,"_46":116,"_17":43,"_42":117,"_40":118,"_69":70,"_50":-5,"_72":119,"_18":120},{"_33":34,"_13":39,"_37":38,"_44":45,"_35":36,"_48":49,"_63":64,"_46":109,"_17":43,"_42":24,"_40":41,"_69":70,"_50":-5,"_72":110,"_18":111},["D",1747594515472],[],[52,39],"9b615a28-3419-11f0-80de-9e149126039e","app.jsx","689e25c6-3419-11f0-8330-9e149126039e",26,["D",1747594503410],"script","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport React, { useState, useEffect } from 'https://esm.sh/react@18.2.0';\nimport { createRoot } from 'https://esm.sh/react-dom@18.2.0/client';\n\n// Import Material UI components\nimport { \n ThemeProvider, \n createTheme, \n CssBaseline \n} from 'https://esm.sh/@material-ui/core@4.12.4?deps=react@18.2.0,react-dom@18.2.0';\n\n// Import the Material UI JSON Schema Viewer\nimport SchemaViewer from 'https://esm.sh/material-ui-json-schema-viewer@2.0.0?deps=react@18.2.0,react-dom@18.2.0,@material-ui/core@4.12.4';\n\n// Get the initial data from the window\nconst initialData = window.__INITIAL_DATA__ || { schemaUrl: null };\n\n// Create a theme\nconst theme = createTheme({\n palette: {\n type: 'light',\n background: {\n default: '#f8f9fa',\n paper: '#fff',\n },\n },\n});\n\n// Error component\nconst ErrorMessage = ({ message }) => (\n

Error

{message}

\n);\n\n// Loading component\nconst Loading = () => (\n

\n Loading schema...\n

\n);\n\n// Main App component\nconst App = () => {\n const [schema, setSchema] = useState(null);\n const [references, setReferences] = useState([]);\n const [loading, setLoading] = useState(false);\n const [error, setError] = useState(null);\n \n useEffect(() => {\n const fetchSchema = async () => {\n if (!initialData.schemaUrl) {\n setError('No schema URL provided. Use ?url=https://example.com/schema.json');\n return;\n }\n \n setLoading(true);\n try {\n const response = await fetch(`/api/schema?url=${encodeURIComponent(initialData.schemaUrl)}`);\n const data = await response.json();\n \n if (data.error) {\n throw new Error(data.error);\n }\n \n setSchema(data.schema);\n // If the schema has an $id, add it to references\n if (data.schema.$id) {\n setReferences([data.schema]);\n }\n } catch (err) {\n setError(err.message || 'Failed to load schema');\n } finally {\n setLoading(false);\n }\n };\n \n fetchSchema();\n }, []);\n \n if (error) {\n return ;\n }\n \n if (loading) {\n return ;\n }\n \n if (!schema) {\n return ;\n }\n \n return (\n \n \n

\n 0 ? references : undefined} \n />\n

\n \n );\n};\n\n// Render the app\nconst root = createRoot(document.getElementById('root'));\nroot.render();",[],[52,113],"5d03411a-3419-11f0-b369-9e149126039e","backend","e29d1567-ea4a-4842-b929-df67bb7a2212",20,["D",1747594398775],[128],[122],{"_33":129,"_13":60,"_37":130,"_44":123,"_35":36,"_48":124,"_63":64,"_46":131,"_17":80,"_42":117,"_40":132,"_69":70,"_50":-5,"_72":133,"_18":134},"5d031fbe-3419-11f0-b369-9e149126039e","5d032068-3419-11f0-b369-9e149126039e",["D",1747594398775],"import { Hono } from 'https://esm.sh/hono@3.11.7';\nimport { readFile, serveFile } from \"https://esm.town/v/std/utils/index.ts\";\n\nconst app = new Hono();\n\n// Unwrap Hono errors to see original error details\napp.onError((err, c) => {\n throw err;\n});\n\n// Serve static files from the frontend directory\napp.get('/frontend/*', c => serveFile(c.req.path, import.meta.url));\n\n// API endpoint to fetch a JSON schema\napp.get('/api/schema', async c => {\n const url = c.req.query('url');\n \n if (!url) {\n return c.json({ error: 'No URL provided' }, 400);\n }\n \n try {\n const response = await fetch(url);\n if (!response.ok) {\n throw new Error(`Failed to fetch schema: ${response.status} ${response.statusText}`);\n }\n const schema = await response.json();\n return c.json({ schema });\n } catch (error) {\n console.error(\"Error fetching schema:\", error);\n return c.json({ error: `Failed to fetch schema: ${error.message}` }, 500);\n }\n});\n\n// Main route to serve the HTML\napp.get('/', async c => {\n const schemaUrl = c.req.query('url');\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n \n // Inject the schema URL into the HTML\n const dataScript = ``;\n \n html = html.replace(\"\", `${dataScript}`);\n \n return c.html(html);\n});\n\nexport default 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