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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 | 18x 20x 20x 20x 20x 20x 20x 20x 7x 7x 7x 3x 3x 3x 7x 7x 6x 6x 6x 6x 5x 6x 6x 6x 10x 10x 6x 4x 4x 10x 10x 10x 32x 32x 32x 32x 32x 32x 13x 19x 19x 32x 32x 32x 30x 30x 30x 30x 30x 4x 4x 4x 26x 26x 26x 8x 8x 8x 8x 2x 6x 6x 6x 6x 6x 6x 2x 4x 2x 2x 5x 5x 5x 2x 3x 3x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 2x 3x 1x 2x 22x 22x 22x 22x 22x 8x 14x 14x 2x 12x 2x 2x 10x 5x 5x 5x 5x 8x 8x 8x 8x 7x 8x 8x 8x 2x 2x 8x 3x 1x 2x 1x 2x 8x 1x 1x 1x 1x 1x 7x 2x 2x 5x 1x 1x 1x 1x 1x 7x 7x 7x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 2x 1x 1x 1x 1x | /* @flow */ import { getOrSetLocalGaiaHubConnection, getFullReadUrl, setLocalGaiaHubConnection, connectToGaiaHub, uploadToGaiaHub, getBucketUrl, BLOCKSTACK_GAIA_HUB_LABEL, type GaiaHubConfig } from './hub' // export { type GaiaHubConfig } from './hub' import { encryptECIES, decryptECIES, signECDSA, verifyECDSA } from '../encryption/ec' import { getPublicKeyFromPrivate, publicKeyToAddress } from '../keys' import { lookupProfile } from '../profiles' import { InvalidStateError, SignatureVerificationError } from '../errors' import { Logger } from '../logger' import { UserSession } from '../auth/userSession' export type PutFileOptions = { encrypt?: boolean | string, sign?: boolean, contentType?: string } const SIGNATURE_FILE_SUFFIX = '.sig' /** * Encrypts the data provided with the app public key. * @param {String|Buffer} content - data to encrypt * @param {Object} [options=null] - options object * @param {String} options.publicKey - the hex string of the ECDSA public * key to use for encryption. If not provided, will use user's appPublicKey. * @return {String} Stringified ciphertext object */ export function encryptContent(content: string | Buffer, options?: {publicKey?: string}) { console.warn('DEPRECATION WARNING: The static encryptContent() function will be deprecated in ' + 'the next major release of blockstack.js. Create an instance of UserSession and call the ' + 'instance method encryptContent().') const userSession = new UserSession() return userSession.encryptContent(content, options) } /** * Decrypts data encrypted with `encryptContent` with the * transit private key. * @param {String|Buffer} content - encrypted content. * @param {Object} [options=null] - options object * @param {String} options.privateKey - the hex string of the ECDSA private * key to use for decryption. If not provided, will use user's appPrivateKey. * @return {String|Buffer} decrypted content. */ export function decryptContent(content: string, options?: {privateKey?: ?string}) { console.warn('DEPRECATION WARNING: The static decryptContent() function will be deprecated in ' + 'the next major release of blockstack.js. Create an instance of UserSession and call the ' + 'instance method decryptContent().') const userSession = new UserSession() return userSession.decryptContent(content, options) } /** * Retrieves the specified file from the app's data store. * @param {String} path - the path to the file to read * @param {Object} [options=null] - options object * @param {Boolean} [options.decrypt=true] - try to decrypt the data with the app private key * @param {String} options.username - the Blockstack ID to lookup for multi-player storage * @param {Boolean} options.verify - Whether the content should be verified, only to be used * when `putFile` was set to `sign = true` * @param {String} options.app - the app to lookup for multi-player storage - * defaults to current origin * @param {String} [options.zoneFileLookupURL=null] - The URL * to use for zonefile lookup. If falsey, this will use the * blockstack.js's getNameInfo function instead. * @returns {Promise} that resolves to the raw data in the file * or rejects with an error */ export function getFile(path: string, options?: { decrypt?: boolean, verify?: boolean, username?: string, app?: string, zoneFileLookupURL?: ?string }) { console.warn('DEPRECATION WARNING: The static getFile() function will be deprecated in ' + 'the next major release of blockstack.js. Create an instance of UserSession and call the ' + 'instance method getFile().') const userSession = new UserSession() return userSession.getFile(path, options) } /** * Stores the data provided in the app's data store to to the file specified. * @param {String} path - the path to store the data in * @param {String|Buffer} content - the data to store in the file * @param {Object} [options=null] - options object * @param {Boolean|String} [options.encrypt=true] - encrypt the data with the app public key * or the provided public key * @param {Boolean} [options.sign=false] - sign the data using ECDSA on SHA256 hashes with * the app private key * @param {String} [options.contentType=''] - set a Content-Type header for unencrypted data * @return {Promise} that resolves if the operation succeed and rejects * if it failed */ export function putFile(path: string, content: string | Buffer, options?: { encrypt?: boolean | string, sign?: boolean, contentType?: string }) { console.warn('DEPRECATION WARNING: The static putFile() function will be deprecated in ' + 'the next major release of blockstack.js. Create an instance of UserSession and call the ' + 'instance method putFile().') const userSession = new UserSession() return userSession.putFile(path, content, options) } /** * List the set of files in this application's Gaia storage bucket. * @param {function} callback - a callback to invoke on each named file that * returns `true` to continue the listing operation or `false` to end it * @return {Promise} that resolves to the number of files listed */ export function listFiles(callback: (name: string) => boolean) : Promise<number> { console.warn('DEPRECATION WARNING: The static listFiles() function will be deprecated in ' + 'the next major release of blockstack.js. Create an instance of UserSession and call the ' + 'instance method listFiles().') const userSession = new UserSession() return userSession.listFiles(callback) } /** * Deletes the specified file from the app's data store. Currently not implemented. * @param {String} path - the path to the file to delete * @returns {Promise} that resolves when the file has been removed * or rejects with an error * @private */ export function deleteFile(path: string) { Promise.reject(new Error(`Delete of ${path} not supported by gaia hubs`)) } /** * Fetch the public read URL of a user file for the specified app. * @param {String} path - the path to the file to read * @param {String} username - The Blockstack ID of the user to look up * @param {String} appOrigin - The app origin * @param {String} [zoneFileLookupURL=null] - The URL * to use for zonefile lookup. If falsey, this will use the * blockstack.js's getNameInfo function instead. * @return {Promise} that resolves to the public read URL of the file * or rejects with an error */ export function getUserAppFileUrl(path: string, username: string, appOrigin: string, zoneFileLookupURL: ?string = null) { return lookupProfile(username, zoneFileLookupURL) .then((profile) => { Eif (profile.hasOwnProperty('apps')) { Eif (profile.apps.hasOwnProperty(appOrigin)) { return profile.apps[appOrigin] } else { return null } } else { return null } }) .then((bucketUrl) => { Eif (bucketUrl) { const bucket = bucketUrl.replace(/\/?(\?|#|$)/, '/$1') return `${bucket}${path}` } else { return null } }) } /** * Encrypts the data provided with the app public key. * @param {UserSession} caller - the instance calling this method * @param {String|Buffer} content - data to encrypt * @param {Object} [options=null] - options object * @param {String} options.publicKey - the hex string of the ECDSA public * key to use for encryption. If not provided, will use user's appPublicKey. * @return {String} Stringified ciphertext object * @private */ export function encryptContentImpl(caller: UserSession, content: string | Buffer, options?: {publicKey?: string}) { const defaults = { publicKey: null } const opt = Object.assign({}, defaults, options) if (!opt.publicKey) { const userData = caller.loadUserData() const privateKey = userData.appPrivateKey opt.publicKey = getPublicKeyFromPrivate(privateKey) } const cipherObject = encryptECIES(opt.publicKey, content) return JSON.stringify(cipherObject) } /** * Decrypts data encrypted with `encryptContent` with the * transit private key. * @param {UserSession} caller - the instance calling this method * @param {String|Buffer} content - encrypted content. * @param {Object} [options=null] - options object * @param {String} options.privateKey - the hex string of the ECDSA private * key to use for decryption. If not provided, will use user's appPrivateKey. * @return {String|Buffer} decrypted content. * @private */ export function decryptContentImpl(caller: UserSession, content: string, options?: {privateKey?: ?string}) { const defaults = { privateKey: null } const opt = Object.assign({}, defaults, options) let privateKey = opt.privateKey if (!privateKey) { privateKey = caller.loadUserData().appPrivateKey } try { const cipherObject = JSON.parse(content) return decryptECIES(privateKey, cipherObject) } catch (err) { if (err instanceof SyntaxError) { throw new Error('Failed to parse encrypted content JSON. The content may not ' + 'be encrypted. If using getFile, try passing { decrypt: false }.') } else { throw err } } } /* Get the gaia address used for servicing multiplayer reads for the given * (username, app) pair. * @private */ function getGaiaAddress(caller: UserSession, app: string, username: ?string, zoneFileLookupURL: ?string) { return Promise.resolve() .then(() => { if (username) { return getUserAppFileUrl('/', username, app, zoneFileLookupURL) } else { return getOrSetLocalGaiaHubConnection(caller) .then(gaiaHubConfig => getFullReadUrl('/', gaiaHubConfig)) } }) .then((fileUrl) => { const matches = fileUrl.match(/([13][a-km-zA-HJ-NP-Z0-9]{26,35})/) Iif (!matches) { throw new Error('Failed to parse gaia address') } return matches[matches.length - 1] }) } export function getFileUrlImpl(caller: UserSession, path: string, options?: { app?: string, username?: string, zoneFileLookupURL?: ?string }): Promise<string> { return Promise.resolve() .then(() => { const appConfig = caller.appConfig Iif (!appConfig) { throw new InvalidStateError('Missing AppConfig') } const defaults = { username: null, app: appConfig.appDomain, zoneFileLookupURL: null } return Object.assign({}, defaults, options) }) .then((opts) => { if (opts.username) { return getUserAppFileUrl(path, opts.username, opts.app, opts.zoneFileLookupURL) } else { return getOrSetLocalGaiaHubConnection(caller) .then(gaiaHubConfig => getFullReadUrl(path, gaiaHubConfig)) } }) .then(readUrl => new Promise((resolve, reject) => { Iif (!readUrl) { reject(null) } else { resolve(readUrl) } })) } /** * Get the URL for reading a file from an app's data store. * @param {String} path - the path to the file to read * @param {Object} [options=null] - options object * @param {String} options.username - the Blockstack ID to lookup for multi-player storage * @param {String} options.app - the app to lookup for multi-player storage - * defaults to current origin * @param {String} [options.zoneFileLookupURL=null] - The URL * to use for zonefile lookup. If falsey, this will use the * blockstack.js's getNameInfo function instead. * @returns {Promise<string>} that resolves to the URL or rejects with an error */ export function getFileUrl(path: string, options?: { username?: string, app?: string, zoneFileLookupURL?: ?string }): Promise<string> { console.warn('DEPRECATION WARNING: The static getFileUrl() function will be deprecated in ' + 'the next major release of blockstack.js. Create an instance of UserSession and call the ' + 'instance method getFileUrl().') const userSession = new UserSession() return getFileUrlImpl(userSession, path, options) } /* Handle fetching the contents from a given path. Handles both * multi-player reads and reads from own storage. * @private */ function getFileContents(caller: UserSession, path: string, app: string, username: ?string, zoneFileLookupURL: ?string, forceText: boolean) : Promise<?string | ?ArrayBuffer> { return Promise.resolve() .then(() => { const opts: any = { app, username, zoneFileLookupURL } return getFileUrlImpl(caller, path, opts) }) .then(readUrl => fetch(readUrl)) .then((response) => { if (response.status !== 200) { Eif (response.status === 404) { Logger.debug(`getFile ${path} returned 404, returning null`) return null } else { throw new Error(`getFile ${path} failed with HTTP status ${response.status}`) } } const contentType = response.headers.get('Content-Type') Eif (forceText || contentType === null || contentType.startsWith('text') || contentType === 'application/json') { return response.text() } else { return response.arrayBuffer() } }) } /* Handle fetching an unencrypted file, its associated signature * and then validate it. Handles both multi-player reads and reads * from own storage. * @private */ function getFileSignedUnencrypted(caller: UserSession, path: string, opt: { username?: ?string, app: string, zoneFileLookupURL?: ?string }) { // future optimization note: // in the case of _multi-player_ reads, this does a lot of excess // profile lookups to figure out where to read files // do browsers cache all these requests if Content-Cache is set? return Promise.all( [getFileContents(caller, path, opt.app, opt.username, opt.zoneFileLookupURL, false), getFileContents(caller, `${path}${SIGNATURE_FILE_SUFFIX}`, opt.app, opt.username, opt.zoneFileLookupURL, true), getGaiaAddress(caller, opt.app, opt.username, opt.zoneFileLookupURL)] ) .then(([fileContents, signatureContents, gaiaAddress]) => { Iif (!fileContents) { return fileContents } Iif (!gaiaAddress) { throw new SignatureVerificationError('Failed to get gaia address for verification of: ' + `${path}`) } if (!signatureContents || typeof signatureContents !== 'string') { throw new SignatureVerificationError('Failed to obtain signature for file: ' + `${path} -- looked in ${path}${SIGNATURE_FILE_SUFFIX}`) } let signature let publicKey try { const sigObject = JSON.parse(signatureContents) signature = sigObject.signature publicKey = sigObject.publicKey } catch (err) { if (err instanceof SyntaxError) { throw new Error('Failed to parse signature content JSON ' + `(path: ${path}${SIGNATURE_FILE_SUFFIX})` + ' The content may be corrupted.') } else { throw err } } const signerAddress = publicKeyToAddress(publicKey) if (gaiaAddress !== signerAddress) { throw new SignatureVerificationError(`Signer pubkey address (${signerAddress}) doesn't` + ` match gaia address (${gaiaAddress})`) } else if (!verifyECDSA(Buffer.from(fileContents), publicKey, signature)) { throw new SignatureVerificationError( 'Contents do not match ECDSA signature: ' + `path: ${path}, signature: ${path}${SIGNATURE_FILE_SUFFIX}` ) } else { return fileContents } }) } /* Handle signature verification and decryption for contents which are * expected to be signed and encrypted. This works for single and * multiplayer reads. In the case of multiplayer reads, it uses the * gaia address for verification of the claimed public key. * @private */ function handleSignedEncryptedContents(caller: UserSession, path: string, storedContents: string, app: string, username: ?string, zoneFileLookupURL: ?string) { const appPrivateKey = caller.loadUserData().appPrivateKey const appPublicKey = getPublicKeyFromPrivate(appPrivateKey) let addressPromise if (username) { addressPromise = getGaiaAddress(caller, app, username, zoneFileLookupURL) } else { const address = publicKeyToAddress(appPublicKey) addressPromise = Promise.resolve(address) } return addressPromise.then((address) => { Iif (!address) { throw new SignatureVerificationError('Failed to get gaia address for verification of: ' + `${path}`) } let sigObject try { sigObject = JSON.parse(storedContents) } catch (err) { if (err instanceof SyntaxError) { throw new Error('Failed to parse encrypted, signed content JSON. The content may not ' + 'be encrypted. If using getFile, try passing' + ' { verify: false, decrypt: false }.') } else { throw err } } const signature = sigObject.signature const signerPublicKey = sigObject.publicKey const cipherText = sigObject.cipherText const signerAddress = publicKeyToAddress(signerPublicKey) Iif (!signerPublicKey || !cipherText || !signature) { throw new SignatureVerificationError( 'Failed to get signature verification data from file:' + ` ${path}` ) } else if (signerAddress !== address) { throw new SignatureVerificationError(`Signer pubkey address (${signerAddress}) doesn't` + ` match gaia address (${address})`) } else if (!verifyECDSA(cipherText, signerPublicKey, signature)) { throw new SignatureVerificationError('Contents do not match ECDSA signature in file:' + ` ${path}`) } else { return caller.decryptContent(cipherText) } }) } /** * Retrieves the specified file from the app's data store. * @param {UserSession} caller - instance calling this method * @param {String} path - the path to the file to read * @param {Object} [options=null] - options object * @param {Boolean} [options.decrypt=true] - try to decrypt the data with the app private key * @param {String} options.username - the Blockstack ID to lookup for multi-player storage * @param {Boolean} options.verify - Whether the content should be verified, only to be used * when `putFile` was set to `sign = true` * @param {String} options.app - the app to lookup for multi-player storage - * defaults to current origin * @param {String} [options.zoneFileLookupURL=null] - The URL * to use for zonefile lookup. If falsey, this will use the * blockstack.js's getNameInfo function instead. * @returns {Promise} that resolves to the raw data in the file * or rejects with an error * @private */ export function getFileImpl(caller: UserSession, path: string, options?: { decrypt?: boolean, verify?: boolean, username?: string, app?: string, zoneFileLookupURL?: ?string }) { const appConfig = caller.appConfig Iif (!appConfig) { throw new InvalidStateError('Missing AppConfig') } const defaults = { decrypt: true, verify: false, username: null, app: appConfig.appDomain, zoneFileLookupURL: null } const opt = Object.assign({}, defaults, options) // in the case of signature verification, but no // encryption expected, need to fetch _two_ files. if (opt.verify && !opt.decrypt) { return getFileSignedUnencrypted(caller, path, opt) } return getFileContents(caller, path, opt.app, opt.username, opt.zoneFileLookupURL, !!opt.decrypt) .then((storedContents) => { if (storedContents === null) { return storedContents } else if (opt.decrypt && !opt.verify) { Iif (typeof storedContents !== 'string') { throw new Error('Expected to get back a string for the cipherText') } return decryptContentImpl(caller, storedContents) } else if (opt.decrypt && opt.verify) { Iif (typeof storedContents !== 'string') { throw new Error('Expected to get back a string for the cipherText') } return handleSignedEncryptedContents(caller, path, storedContents, opt.app, opt.username, opt.zoneFileLookupURL) } else Eif (!opt.verify && !opt.decrypt) { return storedContents } else { throw new Error('Should be unreachable.') } }) } /** * Stores the data provided in the app's data store to to the file specified. * @param {UserSession} caller - instance calling this method * @param {String} path - the path to store the data in * @param {String|Buffer} content - the data to store in the file * @param {Object} [options=null] - options object * @param {Boolean|String} [options.encrypt=true] - encrypt the data with the app public key * or the provided public key * @param {Boolean} [options.sign=false] - sign the data using ECDSA on SHA256 hashes with * the app private key * @param {String} [options.contentType=''] - set a Content-Type header for unencrypted data * @return {Promise} that resolves if the operation succeed and rejects * if it failed * @private */ export function putFileImpl(caller: UserSession, path: string, content: string | Buffer, options?: PutFileOptions) { const defaults = { encrypt: true, sign: false, contentType: '' } const opt = Object.assign({}, defaults, options) let { contentType } = opt if (!contentType) { contentType = (typeof (content) === 'string') ? 'text/plain; charset=utf-8' : 'application/octet-stream' } // First, let's figure out if we need to get public/private keys, // or if they were passed in let privateKey = '' let publicKey = '' if (opt.sign) { Iif (typeof (opt.sign) === 'string') { privateKey = opt.sign } else { privateKey = caller.loadUserData().appPrivateKey } } if (opt.encrypt) { if (typeof (opt.encrypt) === 'string') { publicKey = opt.encrypt } else { if (!privateKey) { privateKey = caller.loadUserData().appPrivateKey } publicKey = getPublicKeyFromPrivate(privateKey) } } // In the case of signing, but *not* encrypting, // we perform two uploads. So the control-flow // here will return there. if (!opt.encrypt && opt.sign) { const signatureObject = signECDSA(privateKey, content) const signatureContent = JSON.stringify(signatureObject) return getOrSetLocalGaiaHubConnection(caller) .then(gaiaHubConfig => new Promise((resolve, reject) => Promise.all([ uploadToGaiaHub(path, content, gaiaHubConfig, contentType), uploadToGaiaHub(`${path}${SIGNATURE_FILE_SUFFIX}`, signatureContent, gaiaHubConfig, 'application/json') ]) .then(resolve) .catch(() => { setLocalGaiaHubConnection(caller) .then(freshHubConfig => Promise.all([ uploadToGaiaHub(path, content, freshHubConfig, contentType), uploadToGaiaHub(`${path}${SIGNATURE_FILE_SUFFIX}`, signatureContent, freshHubConfig, 'application/json') ]) .then(resolve).catch(reject)) }))) .then(fileUrls => fileUrls[0]) } // In all other cases, we only need one upload. if (opt.encrypt && !opt.sign) { content = encryptContentImpl(caller, content, { publicKey }) contentType = 'application/json' } else if (opt.encrypt && opt.sign) { const cipherText = encryptContentImpl(caller, content, { publicKey }) const signatureObject = signECDSA(privateKey, cipherText) const signedCipherObject = { signature: signatureObject.signature, publicKey: signatureObject.publicKey, cipherText } content = JSON.stringify(signedCipherObject) contentType = 'application/json' } return getOrSetLocalGaiaHubConnection(caller) .then(gaiaHubConfig => new Promise((resolve, reject) => { uploadToGaiaHub(path, content, gaiaHubConfig, contentType) .then(resolve) .catch(() => { setLocalGaiaHubConnection(caller) .then(freshHubConfig => uploadToGaiaHub(path, content, freshHubConfig, contentType) .then(resolve).catch(reject)) }) })) } /** * Get the app storage bucket URL * @param {String} gaiaHubUrl - the gaia hub URL * @param {String} appPrivateKey - the app private key used to generate the app address * @returns {Promise} That resolves to the URL of the app index file * or rejects if it fails */ export function getAppBucketUrl(gaiaHubUrl: string, appPrivateKey: string) { return getBucketUrl(gaiaHubUrl, appPrivateKey) } /** * Loop over the list of files in a Gaia hub, and run a callback on each entry. * Not meant to be called by external clients. * @param {GaiaHubConfig} hubConfig - the Gaia hub config * @param {String | null} page - the page ID * @param {number} callCount - the loop count * @param {number} fileCount - the number of files listed so far * @param {function} callback - the callback to invoke on each file. If it returns a falsey * value, then the loop stops. If it returns a truthy value, the loop continues. * @returns {Promise} that resolves to the number of files listed. * @private */ function listFilesLoop(hubConfig: GaiaHubConfig, page: string | null, callCount: number, fileCount: number, callback: (name: string) => boolean) : Promise<number> { Iif (callCount > 65536) { // this is ridiculously huge, and probably indicates // a faulty Gaia hub anyway (e.g. on that serves endless data) throw new Error('Too many entries to list') } let httpStatus const pageRequest = JSON.stringify({ page }) const fetchOptions = { method: 'POST', headers: { 'Content-Type': 'application/json', 'Content-Length': `${pageRequest.length}`, Authorization: `bearer ${hubConfig.token}` }, body: pageRequest } return fetch(`${hubConfig.server}/list-files/${hubConfig.address}`, fetchOptions) .then((response) => { httpStatus = response.status Iif (httpStatus >= 400) { throw new Error(`listFiles failed with HTTP status ${httpStatus}`) } return response.text() }) .then(responseText => JSON.parse(responseText)) .then((responseJSON) => { const entries = responseJSON.entries const nextPage = responseJSON.page Iif (entries === null || entries === undefined) { // indicates a misbehaving Gaia hub or a misbehaving driver // (i.e. the data is malformed) throw new Error('Bad listFiles response: no entries') } for (let i = 0; i < entries.length; i++) { const rc = callback(entries[i]) Iif (!rc) { // callback indicates that we're done return Promise.resolve(fileCount + i) } } if (nextPage && entries.length > 0) { // keep going -- have more entries return listFilesLoop( hubConfig, nextPage, callCount + 1, fileCount + entries.length, callback ) } else { // no more entries -- end of data return Promise.resolve(fileCount + entries.length) } }) } /** * List the set of files in this application's Gaia storage bucket. * @param {UserSession} caller - instance calling this method * @param {function} callback - a callback to invoke on each named file that * returns `true` to continue the listing operation or `false` to end it * @return {Promise} that resolves to the number of files listed * @private */ export function listFilesImpl(caller: UserSession, callback: (name: string) => boolean) : Promise<number> { return getOrSetLocalGaiaHubConnection(caller) .then(gaiaHubConfig => listFilesLoop(gaiaHubConfig, null, 0, 0, callback)) } export { connectToGaiaHub, uploadToGaiaHub, BLOCKSTACK_GAIA_HUB_LABEL } |