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Diffstat (limited to 'public/js/google-drive-upload.js')
| -rw-r--r-- | public/js/google-drive-upload.js | 267 |
1 files changed, 0 insertions, 267 deletions
diff --git a/public/js/google-drive-upload.js b/public/js/google-drive-upload.js deleted file mode 100644 index 6c0e8a62..00000000 --- a/public/js/google-drive-upload.js +++ /dev/null @@ -1,267 +0,0 @@ -/* eslint-env browser, jquery */ -/** - * Helper for implementing retries with backoff. Initial retry - * delay is 1 second, increasing by 2x (+jitter) for subsequent retries - * - * @constructor - */ -var RetryHandler = function () { - this.interval = 1000 // Start at one second - this.maxInterval = 60 * 1000 // Don't wait longer than a minute -} - -/** - * Invoke the function after waiting - * - * @param {function} fn Function to invoke - */ -RetryHandler.prototype.retry = function (fn) { - setTimeout(fn, this.interval) - this.interval = this.nextInterval_() -} - -/** - * Reset the counter (e.g. after successful request.) - */ -RetryHandler.prototype.reset = function () { - this.interval = 1000 -} - -/** - * Calculate the next wait time. - * @return {number} Next wait interval, in milliseconds - * - * @private - */ -RetryHandler.prototype.nextInterval_ = function () { - var interval = this.interval * 2 + this.getRandomInt_(0, 1000) - return Math.min(interval, this.maxInterval) -} - -/** - * Get a random int in the range of min to max. Used to add jitter to wait times. - * - * @param {number} min Lower bounds - * @param {number} max Upper bounds - * @private - */ -RetryHandler.prototype.getRandomInt_ = function (min, max) { - return Math.floor(Math.random() * (max - min + 1) + min) -} - -/** - * Helper class for resumable uploads using XHR/CORS. Can upload any Blob-like item, whether - * files or in-memory constructs. - * - * @example - * var content = new Blob(["Hello world"], {"type": "text/plain"}); - * var uploader = new MediaUploader({ - * file: content, - * token: accessToken, - * onComplete: function(data) { ... } - * onError: function(data) { ... } - * }); - * uploader.upload(); - * - * @constructor - * @param {object} options Hash of options - * @param {string} options.token Access token - * @param {blob} options.file Blob-like item to upload - * @param {string} [options.fileId] ID of file if replacing - * @param {object} [options.params] Additional query parameters - * @param {string} [options.contentType] Content-type, if overriding the type of the blob. - * @param {object} [options.metadata] File metadata - * @param {function} [options.onComplete] Callback for when upload is complete - * @param {function} [options.onProgress] Callback for status for the in-progress upload - * @param {function} [options.onError] Callback if upload fails - */ -var MediaUploader = function (options) { - var noop = function () {} - this.file = options.file - this.contentType = options.contentType || this.file.type || 'application/octet-stream' - this.metadata = options.metadata || { - 'title': this.file.name, - 'mimeType': this.contentType - } - this.token = options.token - this.onComplete = options.onComplete || noop - this.onProgress = options.onProgress || noop - this.onError = options.onError || noop - this.offset = options.offset || 0 - this.chunkSize = options.chunkSize || 0 - this.retryHandler = new RetryHandler() - - this.url = options.url - if (!this.url) { - var params = options.params || {} - params.uploadType = 'resumable' - this.url = this.buildUrl_(options.fileId, params, options.baseUrl) - } - this.httpMethod = options.fileId ? 'PUT' : 'POST' -} - -/** - * Initiate the upload. - */ -MediaUploader.prototype.upload = function () { - var xhr = new XMLHttpRequest() - - xhr.open(this.httpMethod, this.url, true) - xhr.setRequestHeader('Authorization', 'Bearer ' + this.token) - xhr.setRequestHeader('Content-Type', 'application/json') - xhr.setRequestHeader('X-Upload-Content-Length', this.file.size) - xhr.setRequestHeader('X-Upload-Content-Type', this.contentType) - - xhr.onload = function (e) { - if (e.target.status < 400) { - var location = e.target.getResponseHeader('Location') - this.url = location - this.sendFile_() - } else { - this.onUploadError_(e) - } - }.bind(this) - xhr.onerror = this.onUploadError_.bind(this) - xhr.send(JSON.stringify(this.metadata)) -} - -/** - * Send the actual file content. - * - * @private - */ -MediaUploader.prototype.sendFile_ = function () { - var content = this.file - var end = this.file.size - - if (this.offset || this.chunkSize) { - // Only bother to slice the file if we're either resuming or uploading in chunks - if (this.chunkSize) { - end = Math.min(this.offset + this.chunkSize, this.file.size) - } - content = content.slice(this.offset, end) - } - - var xhr = new XMLHttpRequest() - xhr.open('PUT', this.url, true) - xhr.setRequestHeader('Content-Type', this.contentType) - xhr.setRequestHeader('Content-Range', 'bytes ' + this.offset + '-' + (end - 1) + '/' + this.file.size) - xhr.setRequestHeader('X-Upload-Content-Type', this.file.type) - if (xhr.upload) { - xhr.upload.addEventListener('progress', this.onProgress) - } - xhr.onload = this.onContentUploadSuccess_.bind(this) - xhr.onerror = this.onContentUploadError_.bind(this) - xhr.send(content) -} - -/** - * Query for the state of the file for resumption. - * - * @private - */ -MediaUploader.prototype.resume_ = function () { - var xhr = new XMLHttpRequest() - xhr.open('PUT', this.url, true) - xhr.setRequestHeader('Content-Range', 'bytes */' + this.file.size) - xhr.setRequestHeader('X-Upload-Content-Type', this.file.type) - if (xhr.upload) { - xhr.upload.addEventListener('progress', this.onProgress) - } - xhr.onload = this.onContentUploadSuccess_.bind(this) - xhr.onerror = this.onContentUploadError_.bind(this) - xhr.send() -} - -/** - * Extract the last saved range if available in the request. - * - * @param {XMLHttpRequest} xhr Request object - */ -MediaUploader.prototype.extractRange_ = function (xhr) { - var range = xhr.getResponseHeader('Range') - if (range) { - this.offset = parseInt(range.match(/\d+/g).pop(), 10) + 1 - } -} - -/** - * Handle successful responses for uploads. Depending on the context, - * may continue with uploading the next chunk of the file or, if complete, - * invokes the caller's callback. - * - * @private - * @param {object} e XHR event - */ -MediaUploader.prototype.onContentUploadSuccess_ = function (e) { - if (e.target.status === 200 || e.target.status === 201) { - this.onComplete(e.target.response) - } else if (e.target.status === 308) { - this.extractRange_(e.target) - this.retryHandler.reset() - this.sendFile_() - } else { - this.onContentUploadError_(e) - } -} - -/** - * Handles errors for uploads. Either retries or aborts depending - * on the error. - * - * @private - * @param {object} e XHR event - */ -MediaUploader.prototype.onContentUploadError_ = function (e) { - if (e.target.status && e.target.status < 500) { - this.onError(e.target.response) - } else { - this.retryHandler.retry(this.resume_.bind(this)) - } -} - -/** - * Handles errors for the initial request. - * - * @private - * @param {object} e XHR event - */ -MediaUploader.prototype.onUploadError_ = function (e) { - this.onError(e.target.response) // TODO - Retries for initial upload -} - -/** - * Construct a query string from a hash/object - * - * @private - * @param {object} [params] Key/value pairs for query string - * @return {string} query string - */ -MediaUploader.prototype.buildQuery_ = function (params) { - params = params || {} - return Object.keys(params).map(function (key) { - return encodeURIComponent(key) + '=' + encodeURIComponent(params[key]) - }).join('&') -} - -/** - * Build the drive upload URL - * - * @private - * @param {string} [id] File ID if replacing - * @param {object} [params] Query parameters - * @return {string} URL - */ -MediaUploader.prototype.buildUrl_ = function (id, params, baseUrl) { - var url = baseUrl || 'https://www.googleapis.com/upload/drive/v2/files/' - if (id) { - url += id - } - var query = this.buildQuery_(params) - if (query) { - url += '?' + query - } - return url -} - -window.MediaUploader = MediaUploader |