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| 1 | +import { MPUCreateResponse, NAME_REGEX, PASTE_NAME_LEN, PRIVATE_PASTE_NAME_LEN } from "../shared.js" |
| 2 | +import { genRandStr, WorkerError } from "../common.js" |
| 3 | +import { getPasteMetadata, pasteNameAvailable } from "../storage/storage.js" |
| 4 | + |
| 5 | +// POST /mpu/create?n=<optional n>&p=<optional isPrivate> |
| 6 | +// returns JSON { name: string, key: string, uploadId: string } |
| 7 | +export async function handleMPUCreate(request: Request, env: Env): Promise<Response> { |
| 8 | + const url = new URL(request.url) |
| 9 | + const n = url.searchParams.get("n") |
| 10 | + const isPrivate = url.searchParams.get("p") !== null |
| 11 | + |
| 12 | + let name: string | undefined |
| 13 | + if (n) { |
| 14 | + if (!NAME_REGEX.test(n)) { |
| 15 | + throw new WorkerError(400, `illegal paste name ‘${n}’ for MPU create`) |
| 16 | + } |
| 17 | + name = "~" + n |
| 18 | + if (!(await pasteNameAvailable(env, n))) { |
| 19 | + throw new WorkerError(409, `name ‘${name}’ is already used`) |
| 20 | + } |
| 21 | + } else { |
| 22 | + name = genRandStr(isPrivate ? PRIVATE_PASTE_NAME_LEN : PASTE_NAME_LEN) |
| 23 | + } |
| 24 | + |
| 25 | + const multipartUpload = await env.R2.createMultipartUpload(name) |
| 26 | + const resp: MPUCreateResponse = { |
| 27 | + name, |
| 28 | + key: multipartUpload.key, |
| 29 | + uploadId: multipartUpload.uploadId, |
| 30 | + } |
| 31 | + return new Response(JSON.stringify(resp)) |
| 32 | +} |
| 33 | + |
| 34 | +// POST /mpu/create-update?name=<name>&password=<password> |
| 35 | +// returns JSON { name: string, key: string, uploadId: string } |
| 36 | +export async function handleMPUCreateUpdate(request: Request, env: Env): Promise<Response> { |
| 37 | + const url = new URL(request.url) |
| 38 | + const name = url.searchParams.get("name") |
| 39 | + const password = url.searchParams.get("password") |
| 40 | + if (name === null || password === null) { |
| 41 | + throw new WorkerError(400, `missing name or password (password) in searchParams`) |
| 42 | + } |
| 43 | + |
| 44 | + const metadata = await getPasteMetadata(env, name) |
| 45 | + if (metadata === null) { |
| 46 | + throw new WorkerError(404, `paste of name ‘${name}’ is not found`) |
| 47 | + } |
| 48 | + if (password !== metadata.passwd) { |
| 49 | + throw new WorkerError(403, `incorrect password for paste ‘${name}’`) |
| 50 | + } |
| 51 | + |
| 52 | + const multipartUpload = await env.R2.createMultipartUpload(name) |
| 53 | + const resp: MPUCreateResponse = { |
| 54 | + name, |
| 55 | + key: multipartUpload.key, |
| 56 | + uploadId: multipartUpload.uploadId, |
| 57 | + } |
| 58 | + return new Response(JSON.stringify(resp)) |
| 59 | +} |
| 60 | + |
| 61 | +// PUT /mpu/resume?key=<key>&uploadId=<uploadId>&partNumber=<partNumber> |
| 62 | +// return JSON { partNumber: number, etag: string } |
| 63 | +export async function handleMPUResume(request: Request, env: Env): Promise<Response> { |
| 64 | + const url = new URL(request.url) |
| 65 | + |
| 66 | + const uploadId = url.searchParams.get("uploadId") |
| 67 | + const partNumberString = url.searchParams.get("partNumber") |
| 68 | + const key = url.searchParams.get("key") |
| 69 | + if (partNumberString === null || uploadId === null || key === null) { |
| 70 | + throw new WorkerError(400, "missing partNumber or uploadId or key in searchParams") |
| 71 | + } |
| 72 | + if (request.body === null) { |
| 73 | + throw new WorkerError(400, "missing request body") |
| 74 | + } |
| 75 | + |
| 76 | + const partNumber = parseInt(partNumberString) |
| 77 | + const multipartUpload = env.R2.resumeMultipartUpload(key, uploadId) |
| 78 | + const uploadedPart: R2UploadedPart = await multipartUpload.uploadPart(partNumber, request.body) |
| 79 | + return new Response(JSON.stringify(uploadedPart)) |
| 80 | +} |
| 81 | + |
| 82 | +// POST /mpu/complete?name=<name>&key=<key>&uploadId=<uploadId> |
| 83 | +// formdata same as POST/PUT a normal paste, but |
| 84 | +// - field `c` is interpreted as JSON { partNumber: number, etag: string }[] |
| 85 | +// - field `n` is ignored |
| 86 | +export async function handleMPUComplete(request: Request, env: Env, completeBody: R2UploadedPart[]): Promise<string> { |
| 87 | + const url = new URL(request.url) |
| 88 | + const uploadId = url.searchParams.get("uploadId") |
| 89 | + const key = url.searchParams.get("key") |
| 90 | + const name = url.searchParams.get("name") |
| 91 | + if (uploadId === null || key === null || name === null) { |
| 92 | + throw new WorkerError(400, `no uploadId or key for MPU complete`) |
| 93 | + } |
| 94 | + |
| 95 | + const multipartUpload = env.R2.resumeMultipartUpload(key, uploadId) |
| 96 | + |
| 97 | + const object = await multipartUpload.complete(completeBody) |
| 98 | + if (name !== object.key) { |
| 99 | + throw new WorkerError(400, `name ‘${name}’ is not consistent with the originally specified name`) |
| 100 | + } |
| 101 | + return object.httpEtag |
| 102 | +} |
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