@opentelemetry/exporter-zipkin
Version:
OpenTelemetry Zipkin Exporter allows the user to send collected traces to Zipkin.
109 lines • 3.58 kB
JavaScript
;
/*
* Copyright The OpenTelemetry Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.prepareSend = void 0;
const api_1 = require("@opentelemetry/api");
const core_1 = require("@opentelemetry/core");
/**
* Prepares send function that will send spans to the remote Zipkin service.
* @param urlStr - url to send spans
* @param headers - headers
* send
*/
function prepareSend(urlStr, headers) {
let xhrHeaders;
const useBeacon = typeof navigator.sendBeacon === 'function' && !headers;
if (headers) {
xhrHeaders = {
Accept: 'application/json',
'Content-Type': 'application/json',
...headers,
};
}
/**
* Send spans to the remote Zipkin service.
*/
return function send(zipkinSpans, done) {
if (zipkinSpans.length === 0) {
api_1.diag.debug('Zipkin send with empty spans');
return done({ code: core_1.ExportResultCode.SUCCESS });
}
const payload = JSON.stringify(zipkinSpans);
if (useBeacon) {
sendWithBeacon(payload, done, urlStr);
}
else {
sendWithXhr(payload, done, urlStr, xhrHeaders);
}
};
}
exports.prepareSend = prepareSend;
/**
* Sends data using beacon
* @param data
* @param done
* @param urlStr
*/
function sendWithBeacon(data, done, urlStr) {
if (navigator.sendBeacon(urlStr, data)) {
api_1.diag.debug('sendBeacon - can send', data);
done({ code: core_1.ExportResultCode.SUCCESS });
}
else {
done({
code: core_1.ExportResultCode.FAILED,
error: new Error(`sendBeacon - cannot send ${data}`),
});
}
}
/**
* Sends data using XMLHttpRequest
* @param data
* @param done
* @param urlStr
* @param xhrHeaders
*/
function sendWithXhr(data, done, urlStr, xhrHeaders = {}) {
const xhr = new XMLHttpRequest();
xhr.open('POST', urlStr);
Object.entries(xhrHeaders).forEach(([k, v]) => {
xhr.setRequestHeader(k, v);
});
xhr.onreadystatechange = () => {
if (xhr.readyState === XMLHttpRequest.DONE) {
const statusCode = xhr.status || 0;
api_1.diag.debug(`Zipkin response status code: ${statusCode}, body: ${data}`);
if (xhr.status >= 200 && xhr.status < 400) {
return done({ code: core_1.ExportResultCode.SUCCESS });
}
else {
return done({
code: core_1.ExportResultCode.FAILED,
error: new Error(`Got unexpected status code from zipkin: ${xhr.status}`),
});
}
}
};
xhr.onerror = msg => {
(0, core_1.globalErrorHandler)(new Error(`Zipkin request error: ${msg}`));
return done({ code: core_1.ExportResultCode.FAILED });
};
// Issue request to remote service
api_1.diag.debug(`Zipkin request payload: ${data}`);
xhr.send(data);
}
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