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Defaults to the entrypoint of\n * the val where this function is called (`VALTOWN_ENTRYPOINT`), so calling it\n * with no arguments returns the current branch of the calling val.\n * @returns {string} The branch name.\n */\nexport function getBranchName(val?: string): string {\n const { branch } = val === undefined ? parseVal() : parseVal(val);\n return branch;\n}\n\n/**\n * Prefixes a blob key with the current branch name so that each branch of the\n * calling val gets its own isolated blob namespace.\n */\nfunction branchKey(key: string): string {\n return `__branch/${getBranchName()}/${key}`;\n}\n\n/**\n * Prefixes a list filter with the current branch namespace.\n */\nfunction branchPrefix(prefix?: string): string {\n return `__branch/${getBranchName()}/${prefix ?? \"\"}`;\n}\n\n/**\n * Provides functions for interacting with the project-scoped blob storage.\n * Blobs can store any data type (text, JSON, images, etc.) and allow\n * retrieval across different vals using the same key.\n * ([Docs ↗](https://docs.val.town/std/blob))\n */\nexport const blob = {\n /**\n * Gets the data of a blob with the given key.\n *\n * @param {string} key - The key of the blob to get.\n * @returns {Promise} A promise that resolves with the blob data as a Response object.\n * @throws {ValTownBlobNotFoundError} If the blob is not found.\n * @throws {ValTownBlobError} If an error occurs while getting the blob data.\n */\n get: get,\n\n /**\n * Sets the data of a blob with the given key.\n *\n * @param {string} key - The key of the blob to set.\n * @param {BodyInit} value - The data to set for the blob.\n * @throws {ValTownBlobError} If an error occurs while setting the blob data.\n */\n set: set,\n\n /**\n * Copies the data of a blob from one key to another.\n *\n * @param {string} previous - The key of the blob to copy from.\n * @param {string} next - The key of the blob to copy to.\n */\n copy: copy,\n\n /**\n * Moves the data of a blob from one key to another by copying and then deleting the original.\n *\n * @param {string} previous - The key of the blob to move from.\n * @param {string} next - The key of the blob to move to.\n */\n move: move,\n\n /**\n * Lists blobs with an optional prefix filter.\n *\n * @param {string} [prefix] - The prefix to filter the blobs by.\n * @returns {Promise<{ key: string; size: number; lastModified: string }[]>} A promise that resolves with an array of blob metadata.\n */\n list: list,\n\n /**\n * Deletes a blob with the given key.\n *\n * @param {string} key - The key of the blob to delete.\n * @throws {ValTownBlobError} If an error occurs while deleting the blob.\n */\n delete: delete_,\n\n /**\n * Gets the JSON data of a blob with the given key.\n *\n * @param {string} key - The key of the blob to get.\n * @returns {Promise} A promise that resolves with the JSON data of the blob, or undefined if the blob is not found.\n * @throws {ValTownBlobError} If an error occurs while getting the blob data.\n */\n getJSON: getJSON,\n\n /**\n * Sets the JSON data of a blob with the given key.\n *\n * @param {string} key - The key of the blob to set.\n * @param {any} value - The JSON data to set for the blob.\n * @throws {ValTownBlobError} If an error occurs while setting the blob data.\n */\n setJSON: setJSON,\n};\n\nconst BASE = `${API_URL}/v2/blob`;\n\nasync function list(\n prefix?: string,\n): Promise<{ key: string; size: number; lastModified: string }[]> {\n const querystring = `?prefix=${encodeURIComponent(branchPrefix(prefix))}`;\n const res = await fetch(`${BASE}${querystring}`, {\n headers: {\n Authorization: `Bearer ${Deno.env.get(\"valtown\")}`,\n },\n });\n if (!res.ok) {\n const body = await res.text();\n throw new ValTownBlobError(body ? body : \"Error listing blobs\");\n }\n const blobs = await res.json() as {\n key: string;\n size: number;\n lastModified: string;\n }[];\n // Strip the internal branch namespace so callers see their original keys.\n const namespace = `__branch/${getBranchName()}/`;\n return blobs.map((b) => ({\n ...b,\n key: b.key.startsWith(namespace) ? b.key.slice(namespace.length) : b.key,\n }));\n}\n\nasync function delete_(key: string) {\n const res = await fetch(`${BASE}/${encodeURIComponent(branchKey(key))}`, {\n method: \"DELETE\",\n headers: {\n Authorization: `Bearer ${Deno.env.get(\"valtown\")}`,\n },\n });\n if (!res.ok) {\n const body = await res.text();\n throw new ValTownBlobError(body ? body : \"Error deleting blob\");\n }\n}\n\nasync function get(key: string) {\n const res = await fetch(`${BASE}/${encodeURIComponent(branchKey(key))}`, {\n headers: {\n Authorization: `Bearer ${Deno.env.get(\"valtown\")}`,\n },\n });\n if (res.status === 404) {\n throw new ValTownBlobNotFoundError();\n }\n if (!res.ok) {\n const body = await res.text();\n throw new ValTownBlobError(body ? body : \"Error getting blob data\");\n }\n return res;\n}\n\nasync function set(key: string, value: BodyInit) {\n const res = await fetch(`${BASE}/${encodeURIComponent(branchKey(key))}`, {\n method: \"POST\",\n headers: {\n Authorization: `Bearer ${Deno.env.get(\"valtown\")}`,\n },\n body: value,\n });\n if (!res.ok) {\n const body = await res.text();\n throw new ValTownBlobError(body ? body : \"Error setting blob data\");\n }\n}\n\nasync function copy(previous: string, next: string) {\n const res = await get(previous);\n await set(next, res.body);\n}\n\nasync function move(previous: string, next: string) {\n await copy(previous, next);\n await delete_(previous);\n}\n\nasync function getJSON(key: string): Promise {\n try {\n const res = await get(key);\n return res.json();\n } catch (e) {\n if (e instanceof ValTownBlobNotFoundError) {\n return undefined;\n }\n throw e;\n }\n}\n\nasync function setJSON(key: string, value: any) {\n return await set(key, JSON.stringify(value));\n}",[136],"ad32f655-8933-4e7c-9132-c5b2fb0bfec5","README.md","c276b7ee-6685-11f1-94ec-1607ee4eb77e",22,["D",1781286010434],"# blob-branch\n\nA drop-in replacement for Val Town's project-scoped `std/blob` client that\n**automatically isolates blob storage per branch**. Every read and write is\ntransparently namespaced by the branch of the val that calls it, so `main` and\nyour feature branches never see each other's data — with no change to the public\nAPI.\n\n## Why\n\nWhen you fork a branch to experiment, you usually don't want it reading from or\nclobbering the blobs your `main` branch depends on. `blob-branch` solves this by\nprefixing every key with the current branch name behind the scenes.\n\n## Usage\n\n```ts\nimport { blob } from \"https://esm.town/v/nbbaier/blob-branch/main.ts\";\n\nawait blob.setJSON(\"config\", { theme: \"dark\" });\nconst config = await blob.getJSON(\"config\"); // { theme: \"dark\" }\n\nawait blob.list(); // keys are returned un-namespaced\nawait blob.delete(\"config\");\n```\n\nThe API mirrors `std/blob`: `get`, `set`, `getJSON`, `setJSON`, `list`,\n`delete`, `copy`, and `move`.\n\n## How it works\n\n```mermaid\nflowchart LR\n A[\"blob.set('config', …)\"] --> B[\"branchKey('config')\"]\n B --> C[\"getBranchName()\"]\n C --> D[\"parseVal()
(VALTOWN_ENTRYPOINT)\"]\n D --> E[\"branch = 'main'\"]\n E --> F[\"__branch/main/config\"]\n F --> G[\"/v2/blob API\"]\n```\n\n- `getBranchName(val?)` parses a val URL and returns its branch. With no\n argument it defaults to `VALTOWN_ENTRYPOINT` — the val currently executing —\n so it reports the branch of **whatever val calls a blob function**.\n- Keys are stored under `__branch//`.\n- `list()` filters by the branch prefix and strips the namespace off returned\n keys, so callers always see their original key names.\n- `copy`, `move`, `getJSON`, and `setJSON` build on the core functions, so they\n inherit branch-awareness automatically.\n\n### Example: same key, different data per branch\n\n| Branch | Call | Raw stored key |\n| ------- | --------------------------- | ----------------------------- |\n| `main` | `blob.set(\"config\", …)` | `__branch/main/config` |\n| `dev` | `blob.set(\"config\", …)` | `__branch/dev/config` |\n\nThe two writes never collide.\n\n## API\n\n| Function | Description |\n| ------------------------- | ----------------------------------------------------- |\n| `getBranchName(val?)` | Branch of the given val URL, or the current val. |\n| `blob.get(key)` | Get a blob as a `Response`. |\n| `blob.set(key, value)` | Store a blob (`BodyInit`). |\n| `blob.getJSON(key)` | Get and parse JSON, or `undefined` if not found. |\n| `blob.setJSON(key, val)` | Store a value as JSON. |\n| `blob.list(prefix?)` | List blob metadata for the current branch. |\n| `blob.delete(key)` | Delete a blob. |\n| `blob.copy(prev, next)` | Copy a blob to a new key. |\n| `blob.move(prev, next)` | Copy then delete the original. |\n\n## Caveats\n\n- **Existing data isn't migrated.** Blobs written before adopting this client\n live at their old un-prefixed keys and won't be visible through the branched\n API. Migrate them under `__branch//` if you need them.\n- The reserved prefix is `__branch/`. Avoid storing your own keys there.\n",[144],"pulls","branches",1,"forks","envVars",{"_158":60,"_160":60},"connections",{"_158":60,"_159":60},"count","unfilledCount","emptyCount",{"_43":143,"_33":144,"_31":145,"_130":-5,"_41":42,"_40":146,"_131":26,"_38":171,"_13":60,"_34":20,"_36":148,"_23":26,"_133":-5,"_165":172,"_27":173},{"_43":135,"_33":136,"_31":137,"_130":-5,"_41":42,"_40":138,"_131":26,"_38":168,"_13":140,"_34":35,"_36":141,"_23":26,"_133":-5,"_165":169,"_27":170},{"_43":129,"_33":28,"_31":32,"_130":-5,"_41":42,"_40":14,"_131":26,"_38":164,"_13":60,"_34":35,"_36":37,"_23":26,"_133":-5,"_165":166,"_27":167},["D",1781286239060],"children",[],[28],["D",1781285947964],[],[136],["D",1781286010434],[],[144],["D",1781281066791],["D",1789497655664],{"_97":96,"_104":100},{"_97":96,"_98":-5,"_99":100,"_18":54,"_101":102,"_103":26},{"_13":86,"_33":87,"_43":42,"_88":44,"_89":-5,"_90":-5,"_91":-5,"_92":-5,"_93":-5,"_94":45,"_95":96},"ctx",{"_79":-5,"_123":212,"_213":214,"_215":216,"_217":26,"_218":26,"_219":26,"_220":24,"_221":-5,"_222":-7,"_223":-7,"_224":60,"_225":26,"_226":26,"_227":-5,"_228":26,"_229":26,"_230":26,"_231":-5},"ENV",{"_183":184,"_185":186,"_187":87,"_188":189,"_190":191,"_192":193,"_194":195,"_196":197,"_198":199,"_200":201,"_202":203,"_204":205,"_206":207,"_208":209,"_210":211},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

Diff · v23