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GrafanaHTTP.ts
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GrafanaHTTP.ts
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import {AbstractHTTP} from './AbstractHTTP';
import {OnmsError} from '../api/OnmsError';
import {OnmsHTTPOptions} from '../api/OnmsHTTPOptions';
import {OnmsResult} from '../api/OnmsResult';
import {OnmsServer} from '../api/OnmsServer';
import {log, catRest} from '../api/Log';
import {Category} from 'typescript-logging';
import * as clonedeep from 'lodash.clonedeep';
import {GrafanaError} from './GrafanaError';
/** @hidden */
const catGrafana = new Category('grafana', catRest);
/**
* Implementation of the [[IOnmsHTTP]] interface for Grafana.
* @module GrafanaHTTP
* @implements IOnmsHTTP
*/
export class GrafanaHTTP extends AbstractHTTP {
/**
* The Grafana backend object we'll use for making ReST calls.
* @hidden
*/
private backendSrv: any;
/**
* Construct a new GrafanaHTTP implementation.
* @constructor
* @param backendSrv - The Grafana BackendSrv object to use for requests.
* @param server - The OpenNMS server to make requests to.
*/
constructor(backendSrv: any, server?: OnmsServer, timeout?: number) {
super(server, timeout);
this.backendSrv = backendSrv;
}
/** Make an HTTP GET call using the Grafana `BackendSrv`. */
public get(url: string, options?: OnmsHTTPOptions) {
const realUrl = this.getServer(options).resolveURL(url);
log.debug('GET ' + realUrl);
const query = this.getConfig(options);
query.method = 'GET';
query.url = realUrl;
return this.backendSrv.datasourceRequest(query).then((response) => {
let type = 'application/xml';
if (query && query.headers && query.headers.accept) {
type = query.headers.accept;
}
if (response.headers && response.headers['content-type']) {
type = response.headers['content-type'];
}
return OnmsResult.ok(this.getData(response), undefined, response.status, type);
}).catch((e) => {
this.handleError(e, query);
});
}
/** Make an HTTP PUT call using the Grafana `BackendSrv`. */
public put(url: string, options?: OnmsHTTPOptions) {
const realUrl = this.getServer(options).resolveURL(url);
log.debug('PUT ' + realUrl);
const query = this.getConfig(options);
query.method = 'PUT';
query.url = realUrl;
query.data = Object.apply({}, query.parameters);
return this.backendSrv.datasourceRequest(query).then((response) => {
let type = 'application/xml';
if (query && query.headers && query.headers.accept) {
type = query.headers.accept;
}
if (response.headers && response.headers['content-type']) {
type = response.headers['content-type'];
}
return OnmsResult.ok(this.getData(response), undefined, response.status, type);
}).catch((e) => {
this.handleError(e, query);
});
}
/** Make an HTTP POST call using the Grafana `BackendSrv`. */
public post(url: string, options?: OnmsHTTPOptions) {
const realUrl = this.getServer(options).resolveURL(url);
log.debug('POST ' + realUrl);
const query = this.getConfig(options);
query.method = 'POST';
query.url = realUrl;
return this.backendSrv.datasourceRequest(query).then((response) => {
let type = 'application/xml';
if (query && query.headers && query.headers.accept) {
type = query.headers.accept;
}
if (response.headers && response.headers['content-type']) {
type = response.headers['content-type'];
}
return OnmsResult.ok(this.getData(response), undefined, response.status, type);
}).catch((e) => {
this.handleError(e, query);
});
}
/** Make an HTTP DELETE call using the Grafana `BackendSrv`. */
public httpDelete(url: string, options?: OnmsHTTPOptions) {
const realUrl = this.getServer(options).resolveURL(url);
log.debug('DELETE ' + realUrl);
const query = this.getConfig(options);
query.method = 'DELETE';
query.url = realUrl;
return this.backendSrv.datasourceRequest(query).then((response) => {
let type = 'application/xml';
if (query && query.headers && query.headers.accept) {
type = query.headers.accept;
}
if (response.headers && response.headers['content-type']) {
type = response.headers['content-type'];
}
return OnmsResult.ok(this.getData(response), undefined, response.status, type);
}).catch((e) => {
this.handleError(e, query);
});
}
/**
* A callback to handle any request errors.
* @hidden
*/
protected handleError(err: any, options?: any): never {
let message = AbstractHTTP.extractMessage(err);
if (err && err.data && err.data.response && (typeof (err.data.response) === 'string')) {
message = err.data.response;
}
const status = AbstractHTTP.extractStatus(err);
throw new GrafanaError(message, status, options, err);
}
/**
* Internal method to turn [[OnmsHTTPOptions]] into a Grafana `BackendSrv` request object.
* @hidden
*/
private getConfig(options?: OnmsHTTPOptions): any {
const allOptions = this.getOptions(options);
const ret = clonedeep(allOptions.toJSON());
ret.transformResponse = []; // we do this so we can post-process only on success
if (allOptions.headers) {
ret.headers = clonedeep(allOptions.headers);
} else {
ret.headers = {};
}
if (allOptions.auth && allOptions.auth.username && allOptions.auth.password) {
ret.withCredentials = true;
ret.headers.Authorization = 'Basic ' + btoa(allOptions.auth.username + ':' + allOptions.auth.password);
}
// Enforce Accept-Header
if (!ret.headers.accept) {
ret.headers.accept = 'application/json';
}
// Enforce Content-Type-Header when data is being sent
if (ret.data && !ret.headers['content-type']) {
ret.headers['content-type'] = 'application/json;charset=utf-8';
}
if (ret.parameters && Object.keys(ret.parameters).length > 0) {
ret.params = ret.parameters;
delete ret.parameters;
}
return ret;
}
}