##// END OF EJS Templates
Modifies Contents API to return Error objects...
Modifies Contents API to return Error objects Modfies the Contents class to return JavaScript Error objects instead of passing on the return values from $.ajax(). This has two advantages. First, it allows the content manager to parse errors and give more informative messages than the ajax response. Second, it makes the Contents interface more general, since other kinds of backends might generate client-side errors.

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contents.js
251 lines | 8.2 KiB | application/javascript | JavascriptLexer
// Copyright (c) IPython Development Team.
// Distributed under the terms of the Modified BSD License.
define([
'base/js/namespace',
'jquery',
'base/js/utils',
'base/js/dialog',
], function(IPython, $, utils, dialog) {
var Contents = function(options) {
// Constructor
//
// A contents handles passing file operations
// to the back-end. This includes checkpointing
// with the normal file operations.
//
// Parameters:
// options: dictionary
// Dictionary of keyword arguments.
// base_url: string
this.base_url = options.base_url;
};
/** Error type */
Contents.DIRECTORY_NOT_EMPTY_ERROR = 'DirectoryNotEmptyError';
Contents.DirectoryNotEmptyError = function() {
// Constructor
//
// An error representing the result of attempting to delete a non-empty
// directory.
this.message = 'A directory must be empty before being deleted.';
}
Contents.DirectoryNotEmptyError.prototype = new Error;
Contents.DirectoryNotEmptyError.prototype.name =
Contents.DIRECTORY_NOTE_EMPTY_ERROR;
Contents.prototype.api_url = function() {
var url_parts = [this.base_url, 'api/contents'].concat(
Array.prototype.slice.apply(arguments));
return utils.url_join_encode.apply(null, url_parts);
};
/**
* Creates a basic error handler that wraps a jqXHR error as an Error.
*
* Takes a callback that accepts an Error, and returns a callback that can
* be passed directly to $.ajax, which will wrap the error from jQuery
* as an Error, and pass that to the original callback.
*
* @method create_basic_error_handler
* @param{Function} callback
* @return{Function}
*/
Contents.prototype.create_basic_error_handler = function(callback) {
if (!callback) {
return function(xhr, status, error) { };
}
return function(xhr, status, error) {
callback(utils.wrap_ajax_error(xhr, status, error));
};
}
/**
* File Functions (including notebook operations)
*/
/**
* Load a file.
*
* Calls success with file JSON model, or error with error.
*
* @method load_notebook
* @param {String} path
* @param {String} name
* @param {Function} success
* @param {Function} error
*/
Contents.prototype.load_file = function (path, name, options) {
// We do the call with settings so we can set cache to false.
var settings = {
processData : false,
cache : false,
type : "GET",
dataType : "json",
success : options.success,
error : this.create_basic_error_handler(options.error)
};
var url = this.api_url(path, name);
$.ajax(url, settings);
};
/**
* Creates a new notebook file at the specified directory path.
*
* @method scroll_to_cell
* @param {String} path The path to create the new notebook at
*/
Contents.prototype.new_notebook = function(path, options) {
var error = options.error || function() {};
var settings = {
processData : false,
cache : false,
type : "POST",
dataType : "json",
success : options.success || function() {},
error : this.create_basic_error_handler(options.error)
};
$.ajax(this.api_url(path), settings);
};
Contents.prototype.delete_file = function(name, path, options) {
var error = options.error || function() {};
var that = this;
var settings = {
processData : false,
cache : false,
type : "DELETE",
dataType : "json",
success : options.success || function() {},
error : function(xhr, status, error) {
// TODO: update IPEP27 to specify errors more precisely, so
// that error types can be detected here with certainty.
if (xhr.status === 400) {
error(new Contents.DirectoryNotEmptyError());
}
error(utils.wrap_ajax_error(xhr, status, error));
}
};
var url = this.api_url(path, name);
$.ajax(url, settings);
};
Contents.prototype.rename_file = function(path, name, new_path, new_name, options) {
var data = {name: new_name, path: new_path};
var settings = {
processData : false,
cache : false,
type : "PATCH",
data : JSON.stringify(data),
dataType: "json",
contentType: 'application/json',
success : options.success || function() {},
error : this.create_basic_error_handler(options.error)
};
var url = this.api_url(path, name);
$.ajax(url, settings);
};
Contents.prototype.save_file = function(path, name, model, options) {
// We do the call with settings so we can set cache to false.
var settings = {
processData : false,
cache : false,
type : "PUT",
data : JSON.stringify(model),
contentType: 'application/json',
success : options.success || function() {},
error : this.create_basic_error_handler(options.error)
};
if (options.extra_settings) {
$.extend(settings, options.extra_settings);
}
var url = this.api_url(path, name);
$.ajax(url, settings);
};
/**
* Checkpointing Functions
*/
Contents.prototype.create_checkpoint = function(path, name, options) {
var url = this.api_url(path, name, 'checkpoints');
var settings = {
type : "POST",
success: options.success || function() {},
error : this.create_basic_error_handler(options.error)
};
$.ajax(url, settings);
};
Contents.prototype.list_checkpoints = function(path, name, options) {
var url = this.api_url(path, name, 'checkpoints');
var settings = {
type : "GET",
success: options.success,
error : this.create_basic_error_handler(options.error)
};
$.ajax(url, settings);
};
Contents.prototype.restore_checkpoint = function(path, name, checkpoint_id, options) {
var url = this.api_url(path, name, 'checkpoints', checkpoint_id);
var settings = {
type : "POST",
success: options.success || function() {},
error : this.create_basic_error_handler(options.error)
};
$.ajax(url, settings);
};
Contents.prototype.delete_checkpoint = function(path, name, checkpoint_id, options) {
var url = this.api_url(path, name, 'checkpoints', checkpoint_id);
var settings = {
type : "DELETE",
success: options.success || function() {},
error : this.create_basic_error_handler(options.error)
};
$.ajax(url, settings);
};
/**
* File management functions
*/
/**
* List notebooks and directories at a given path
*
* On success, load_callback is called with an array of dictionaries
* representing individual files or directories. Each dictionary has
* the keys:
* type: "notebook" or "directory"
* name: the name of the file or directory
* created: created date
* last_modified: last modified dat
* path: the path
* @method list_notebooks
* @param {String} path The path to list notebooks in
* @param {Function} load_callback called with list of notebooks on success
* @param {Function} error called with ajax results on error
*/
Contents.prototype.list_contents = function(path, options) {
var settings = {
processData : false,
cache : false,
type : "GET",
dataType : "json",
success : options.success,
error : this.create_basic_error_handler(options.error)
};
$.ajax(this.api_url(path), settings);
};
IPython.Contents = Contents;
return {'Contents': Contents};
});