gateway.go

Copyright 2021 Red Hat, Inc

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

 http://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.

 
package
 
push

Documentation in literate-programming-style is available at: https://redhatinsights.github.io/insights-operator-utils/packages/metrics/push/gateway.html

 


import
 
(

	
"net/http"


	
"github.com/rs/zerolog/log"


)

GatewayClient is a simple wrapper over http.Client so that prometheus can do HTTP requests with the given authentication header

 
type
 
GatewayClient
 
struct
 
{

	
AuthToken
 
string


	
HTTPClient
 
http
.
Client


}

Do is a simple wrapper over http.Client.Do method that includes the authentication header configured in the PushGatewayClient instance

 
func
 
(
pgc
 
*
GatewayClient
)
 
Do
(
request
 
*
http
.
Request
)
 
(
*
http
.
Response
,
 
error
)
 
{

	
if
 
pgc
.
AuthToken
 
!=
 
""
 
{

		
log
.
Debug
(
)
.
Msg
(
"Adding authorization header to HTTP request"
)

		
request
.
Header
.
Set
(
"Authorization"
,
 
"Basic "
+
pgc
.
AuthToken
)

	
}
 
else
 
{

		
log
.
Debug
(
)
.
Msg
(
"No authorization token provided. Making HTTP request without credentials."
)

	
}

	
log
.
Debug
(
)
.

		
Str
(
"request"
,
 
request
.
URL
.
String
(
)
)
.

		
Str
(
"method"
,
 
request
.
Method
)
.

		
Msg
(
"Pushing metrics to Prometheus push gateway"
)

	
resp
,
 
err
 
:=
 
pgc
.
HTTPClient
.
Do
(
request
)

	
if
 
resp
 
!=
 
nil
 
{

		
log
.
Debug
(
)
.
Int
(
"code"
,
 
resp
.
StatusCode
)
.
Msg
(
"Returned status code"
)

	
}

	
return
 
resp
,
 
err


}