295 lines
10 KiB
JavaScript
295 lines
10 KiB
JavaScript
(function($, undefined) {
|
|
$.extend({
|
|
jsonRPC: {
|
|
// RPC Version Number
|
|
version: '2.0',
|
|
|
|
// End point URL, sets default in requests if not
|
|
// specified with the request call
|
|
endPoint: null,
|
|
|
|
// Default namespace for methods
|
|
namespace: null,
|
|
|
|
/*
|
|
* Provides the RPC client with an optional default endpoint and namespace
|
|
*
|
|
* @param {object} The params object which can contain
|
|
* endPoint {string} The default endpoint for RPC requests
|
|
* namespace {string} The default namespace for RPC requests
|
|
* cache {boolean} If set to false, it will force requested
|
|
* pages not to be cached by the browser. Setting cache
|
|
* to false also appends a query string parameter,
|
|
* "_=[TIMESTAMP]", to the URL. (Default: true)
|
|
*/
|
|
setup: function(params) {
|
|
this._validateConfigParams(params);
|
|
this.endPoint = params.endPoint;
|
|
this.namespace = params.namespace;
|
|
this.cache = params.cache !== undefined ? params.cache : true;
|
|
return this;
|
|
},
|
|
|
|
/*
|
|
* Convenience wrapper method to allow you to temporarily set a config parameter
|
|
* (endPoint or namespace) and ensure it gets set back to what it was before
|
|
*
|
|
* @param {object} The params object which can contains
|
|
* endPoint {string} The default endpoint for RPC requests
|
|
* namespace {string} The default namespace for RPC requests
|
|
* @param {function} callback The function to call with the new params in place
|
|
*/
|
|
withOptions: function(params, callback) {
|
|
this._validateConfigParams(params);
|
|
// No point in running if there isn't a callback received to run
|
|
if(callback === undefined) throw("No callback specified");
|
|
|
|
origParams = {endPoint: this.endPoint, namespace: this.namespace};
|
|
this.setup(params);
|
|
callback.call(this);
|
|
this.setup(origParams);
|
|
},
|
|
|
|
/*
|
|
* Performas a single RPC request
|
|
*
|
|
* @param {string} method The name of the rpc method to be called
|
|
* @param {object} options A collection of object which can contains
|
|
* params {array} the params array to send along with the request
|
|
* success {function} a function that will be executed if the request succeeds
|
|
* error {function} a function that will be executed if the request fails
|
|
* url {string} the url to send the request to
|
|
* id {string} the provenance id for this request (defaults to 1)
|
|
* cache {boolean} If set to false, it will force requested
|
|
* pages not to be cached by the browser. Setting cache
|
|
* to false also appends a query string parameter,
|
|
* "_=[TIMESTAMP]", to the URL. (Default: cache value
|
|
* set with the setup method)
|
|
* @return {undefined}
|
|
*/
|
|
request: function(method, options) {
|
|
if(options === undefined) {
|
|
options = { id: 1 };
|
|
}
|
|
if (options.id === undefined) {
|
|
options.id = 1;
|
|
}
|
|
if (options.cache === undefined) {
|
|
options.cache = this.cache;
|
|
}
|
|
|
|
// Validate method arguments
|
|
this._validateRequestMethod(method);
|
|
this._validateRequestParams(options.params);
|
|
this._validateRequestCallbacks(options.success, options.error);
|
|
|
|
// Perform the actual request
|
|
this._doRequest(JSON.stringify(this._requestDataObj(method, options.params, options.id)), options);
|
|
|
|
return true;
|
|
},
|
|
|
|
/*
|
|
* Submits multiple requests
|
|
* Takes an array of objects that contain a method and params
|
|
*
|
|
* @params {array} requests an array of request object which can contain
|
|
* method {string} the name of the method
|
|
* param {object} the params object to be sent with the request
|
|
* id {string} the provenance id for the request (defaults to an incrementer starting at 1)
|
|
* @param {object} options A collection of object which can contains
|
|
* success {function} a function that will be executed if the request succeeds
|
|
* error {function} a function that will be executed if the request fails
|
|
* url {string} the url to send the request to
|
|
* @return {undefined}
|
|
*/
|
|
batchRequest: function(requests, options) {
|
|
if(options === undefined) {
|
|
options = {};
|
|
}
|
|
|
|
// Ensure our requests come in as an array
|
|
if(!$.isArray(requests) || requests.length === 0) throw("Invalid requests supplied for jsonRPC batchRequest. Must be an array object that contain at least a method attribute");
|
|
|
|
// Make sure each of our request objects are valid
|
|
var _that = this;
|
|
$.each(requests, function(i, req) {
|
|
_that._validateRequestMethod(req.method);
|
|
_that._validateRequestParams(req.params);
|
|
if (req.id === undefined) {
|
|
req.id = i + 1;
|
|
}
|
|
});
|
|
this._validateRequestCallbacks(options.success, options.error);
|
|
|
|
var data = [],
|
|
request;
|
|
|
|
// Prepare our request object
|
|
for(var i = 0; i<requests.length; i++) {
|
|
request = requests[i];
|
|
data.push(this._requestDataObj(request.method, request.params, request.id));
|
|
}
|
|
|
|
this._doRequest(JSON.stringify(data), options);
|
|
},
|
|
|
|
// Validate a params hash
|
|
_validateConfigParams: function(params) {
|
|
if(params === undefined) {
|
|
throw("No params specified");
|
|
}
|
|
else {
|
|
if(params.endPoint && typeof(params.endPoint) !== 'string'){
|
|
throw("endPoint must be a string");
|
|
}
|
|
if(params.namespace && typeof(params.namespace) !== 'string'){
|
|
throw("namespace must be a string");
|
|
}
|
|
}
|
|
},
|
|
|
|
// Request method must be a string
|
|
_validateRequestMethod: function(method) {
|
|
if(typeof(method) !== 'string') throw("Invalid method supplied for jsonRPC request")
|
|
return true;
|
|
},
|
|
|
|
// Validate request params. Must be a) empty, b) an object (e.g. {}), or c) an array
|
|
_validateRequestParams: function(params) {
|
|
if(!(params === null ||
|
|
params === undefined ||
|
|
typeof(params) === 'object' ||
|
|
$.isArray(params))) {
|
|
throw("Invalid params supplied for jsonRPC request. It must be empty, an object or an array.");
|
|
}
|
|
return true;
|
|
},
|
|
|
|
_validateRequestCallbacks: function(success, error) {
|
|
// Make sure callbacks are either empty or a function
|
|
if(success !== undefined &&
|
|
typeof(success) !== 'function') throw("Invalid success callback supplied for jsonRPC request");
|
|
if(error !== undefined &&
|
|
typeof(error) !== 'function') throw("Invalid error callback supplied for jsonRPC request");
|
|
return true;
|
|
},
|
|
|
|
// Internal method used for generic ajax requests
|
|
_doRequest: function(data, options) {
|
|
var _that = this;
|
|
$.ajax({
|
|
type: 'POST',
|
|
async: false !== options.async,
|
|
dataType: 'json',
|
|
contentType: 'application/json',
|
|
url: this._requestUrl((options.endPoint || options.url), options.cache),
|
|
data: data,
|
|
cache: options.cache,
|
|
headers: options.headers,
|
|
processData: false,
|
|
error: function(json) {
|
|
_that._requestError.call(_that, json, options.error);
|
|
},
|
|
success: function(json) {
|
|
_that._requestSuccess.call(_that, json, options.success, options.error);
|
|
}
|
|
})
|
|
},
|
|
|
|
// Determines the appropriate request URL to call for a request
|
|
_requestUrl: function(url, cache) {
|
|
url = url || this.endPoint;
|
|
if (!cache) {
|
|
if (url.indexOf("?") < 0) {
|
|
url += '?tm=' + new Date().getTime();
|
|
}
|
|
else {
|
|
url += "&tm=" + new Date().getTime();
|
|
}
|
|
}
|
|
return url;
|
|
},
|
|
|
|
// Creates an RPC suitable request object
|
|
_requestDataObj: function(method, params, id) {
|
|
var dataObj = {
|
|
jsonrpc: this.version,
|
|
method: this.namespace ? this.namespace +'.'+ method : method,
|
|
id: id
|
|
}
|
|
if(params !== undefined) {
|
|
dataObj.params = params;
|
|
}
|
|
return dataObj;
|
|
},
|
|
|
|
// Handles calling of error callback function
|
|
_requestError: function(json, error) {
|
|
if (error !== undefined && typeof(error) === 'function') {
|
|
if(typeof(json.responseText) === 'string') {
|
|
try {
|
|
error(JSON.parse(json.responseText));
|
|
}
|
|
catch(e) {
|
|
error(this._response());
|
|
}
|
|
}
|
|
else {
|
|
error(this._response());
|
|
}
|
|
}
|
|
},
|
|
|
|
// Handles calling of RPC success, calls error callback
|
|
// if the response contains an error
|
|
// TODO: Handle error checking for batch requests
|
|
_requestSuccess: function(json, success, error) {
|
|
var response = this._response(json);
|
|
|
|
// If we've encountered an error in the response, trigger the error callback if it exists
|
|
if(response.error && typeof(error) === 'function') {
|
|
error(response);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, successful request, run the success request if it exists
|
|
if(typeof(success) === 'function') {
|
|
success(response);
|
|
}
|
|
},
|
|
|
|
// Returns a generic RPC 2.0 compatible response object
|
|
_response: function(json) {
|
|
if (json === undefined) {
|
|
return {
|
|
error: 'Internal server error',
|
|
version: '2.0'
|
|
};
|
|
}
|
|
else {
|
|
try {
|
|
if(typeof(json) === 'string') {
|
|
json = JSON.parse(json);
|
|
}
|
|
|
|
if (($.isArray(json) && json.length > 0 && json[0].jsonrpc !== '2.0') ||
|
|
(!$.isArray(json) && json.jsonrpc !== '2.0')) {
|
|
throw 'Version error';
|
|
}
|
|
|
|
return json;
|
|
}
|
|
catch (e) {
|
|
return {
|
|
error: 'Internal server error: ' + e,
|
|
version: '2.0'
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
});
|
|
})(jQuery);
|