81e955e6b5
* BackendSrv: Observable all the way POC * starting to unify code paths * tests pass * Unified error handling * Single request path and error handling * Fixed ts issue * another ts issu * Added back old requestId cancellation * Slow progress trying to grasp the full picture of cancellation * Updates * refactoring * Remove a bunch of stuff from backendSrv * Removed another function * Do not show error alerts for data queries * Muu * Updated comment * fixed ts issue * unify request options type * Made query inspector subscribe to backendSrv stream instead of legacy app events * Add back support for err.isHandled to limit scope * never show success alerts * Updated tests * Fixing tests * Minor weak * Improved logic for the showErrorAlert and showSuccessAlert boolean flags, now they work more logically * Fix issue
7.2 KiB
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title = "BackendSrv" keywords = ["grafana","documentation","sdk","@grafana/runtime"] type = "docs" +++
BackendSrv interface
Used to communicate via http(s) to a remote backend such as the Grafana backend, a datasource etc. The BackendSrv is using the Fetch API under the hood to handle all the communication.
The request function can be used to perform a remote call by specifying a BackendSrvRequest. To make the BackendSrv a bit easier to use we have added a couple of shorthand functions that will use default values executing the request.
Signature
export interface BackendSrv
Import
import { BackendSrv } from '@grafana/runtime';
Remarks
By default Grafana will display an error message alert if the remote call fails. If you want to prevent this from happending you need to catch the error thrown by the BackendSrv and set the showErrorAlert = true on the request options object.
In versions prior to v7.2 you disable the notification alert by setting isHandled on the caught error
Methods
| Method | Description |
|---|---|
| datasourceRequest(options) | Special function used to communicate with datasources that will emit core events that the Grafana QueryInspector and QueryEditor is listening for to be able to display datasource query information. Can be skipped by adding option.silent when initializing the request. |
| delete(url) | |
| get(url, params, requestId) | |
| patch(url, data) | |
| post(url, data) | |
| put(url, data) | |
| request(options) |
datasourceRequest method
Special function used to communicate with datasources that will emit core events that the Grafana QueryInspector and QueryEditor is listening for to be able to display datasource query information. Can be skipped by adding option.silent when initializing the request.
Signature
datasourceRequest(options: BackendSrvRequest): Promise<any>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| options | BackendSrvRequest |
Returns:
Promise<any>
delete method
Signature
delete(url: string): Promise<any>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| url | string |
Returns:
Promise<any>
get method
Signature
get(url: string, params?: any, requestId?: string): Promise<any>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| url | string |
|
| params | any |
|
| requestId | string |
Returns:
Promise<any>
patch method
Signature
patch(url: string, data?: any): Promise<any>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| url | string |
|
| data | any |
Returns:
Promise<any>
post method
Signature
post(url: string, data?: any): Promise<any>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| url | string |
|
| data | any |
Returns:
Promise<any>
put method
Signature
put(url: string, data?: any): Promise<any>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| url | string |
|
| data | any |
Returns:
Promise<any>
request method
Signature
request(options: BackendSrvRequest): Promise<any>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| options | BackendSrvRequest |
Returns:
Promise<any>