76 lines
2 KiB
JavaScript
76 lines
2 KiB
JavaScript
const jsonrpc = {};
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jsonrpc.call = function (connectionString, method, params, callback, errorCallback, connectFailedCallback, timeout) {
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var xhr = new XMLHttpRequest;
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if (typeof connectFailedCallback !== 'undefined') {
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if (timeout) {
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xhr.timeout = timeout;
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}
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xhr.addEventListener('error', function (e) {
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connectFailedCallback(e);
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});
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xhr.addEventListener('timeout', function() {
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connectFailedCallback(new Error('XMLHttpRequest connection timed out'));
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})
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}
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xhr.addEventListener('load', function() {
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var response = JSON.parse(xhr.responseText);
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if (response.error) {
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if (errorCallback) {
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errorCallback(response.error);
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} else {
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var errorEvent = new CustomEvent('unhandledError', {
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detail: {
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connectionString: connectionString,
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method: method,
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params: params,
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code: response.error.code,
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message: response.error.message,
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data: response.error.data
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}
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});
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document.dispatchEvent(errorEvent)
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}
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} else if (callback) {
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callback(response.result);
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}
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});
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if (connectFailedCallback) {
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xhr.addEventListener('error', function (event) {
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connectFailedCallback(event);
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});
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} else {
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xhr.addEventListener('error', function (event) {
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var errorEvent = new CustomEvent('unhandledError', {
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detail: {
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connectionString: connectionString,
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method: method,
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params: params,
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code: xhr.status,
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message: 'Connection to API server failed'
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}
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});
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document.dispatchEvent(errorEvent);
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});
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}
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const counter = parseInt(sessionStorage.getItem('JSONRPCCounter') || 0);
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xhr.open('POST', connectionString, true);
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xhr.send(JSON.stringify({
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'jsonrpc': '2.0',
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'method': method,
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'params': params,
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'id': counter,
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}));
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sessionStorage.setItem('JSONRPCCounter', counter + 1);
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return xhr
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};
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export default jsonrpc;
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