Copyright 2020 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.
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Package httputils contains HTTP-related utility functions.
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package httputils
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Documentation in literate-programming-style is available at:
https://redhatinsights.github.io/insights-operator-utils/packages/http/http.html
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import (
"fmt"
"io"
"net/http"
"net/url"
"regexp"
"strings"
"time"
)
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MakeURLToEndpoint creates URL to endpoint, use constants from file endpoints.go
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func MakeURLToEndpoint ( apiPrefix , endpoint string , args ... interface { } ) string {
endpoint = ReplaceParamsInEndpointAndTrimLeftSlash ( endpoint , "%v" )
if apiPrefix != "/" && len ( endpoint ) > 0 {
apiPrefix = strings . TrimRight ( apiPrefix , "/" )
}
nonParsedURL := apiPrefix
endpointWithArgs := fmt . Sprintf ( endpoint , args ... )
if len ( endpointWithArgs ) > 0 {
nonParsedURL += "/" + endpointWithArgs
}
resultingURL , err := url . Parse ( nonParsedURL )
if err != nil {
return nonParsedURL
}
return resultingURL . String ( )
}
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ReplaceParamsInEndpointAndTrimLeftSlash replaces params in endpoint and trims left slash
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func ReplaceParamsInEndpointAndTrimLeftSlash ( endpoint , replacer string ) string {
re := regexp . MustCompile ( `\{[a-zA-Z_0-9]+\}` )
endpoint = re . ReplaceAllString ( endpoint , replacer )
endpoint = strings . TrimLeft ( endpoint , "/" )
return endpoint
}
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MakeURLToEndpointMapString creates URL to endpoint using arguments in map in string format, use constants from file endpoints.go
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func MakeURLToEndpointMapString ( apiPrefix , endpoint string , args map [ string ] string ) string {
newArgs := make ( map [ string ] interface { } )
for key , val := range args {
newArgs [ key ] = val
}
return MakeURLToEndpointMap ( apiPrefix , endpoint , newArgs )
}
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MakeURLToEndpointMap creates URL to endpoint using arguments in map, use constants from file endpoints.go
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func MakeURLToEndpointMap ( apiPrefix , endpoint string , args map [ string ] interface { } ) string {
endpoint = strings . TrimLeft ( endpoint , "/" )
for key , val := range args {
endpoint = strings . ReplaceAll ( endpoint , fmt . Sprintf ( "{%v}" , key ) , fmt . Sprint ( val ) )
}
apiPrefix = strings . TrimRight ( apiPrefix , "/" )
return apiPrefix + "/" + endpoint
}
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SetHTTPPrefix adds HTTP prefix if it is not already present in the given string
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func SetHTTPPrefix ( originalURL string ) string {
if ! strings . HasPrefix ( originalURL , "http" ) {
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if no protocol is specified in given URL, assume it is not
needed to use https
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return "http://" + originalURL
}
return originalURL
}
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SendRequest sends the given request, reads the body and handles related errors
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func SendRequest ( req * http . Request , timeout time . Duration ) ( [ ] byte , error ) {
client := & http . Client {
Timeout : timeout ,
}
response , err := client . Do ( req )
if err != nil {
return nil , err
}
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Read body from response
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body , err := io . ReadAll ( response . Body )
if err != nil {
return nil , err
}
err = response . Body . Close ( )
if err != nil {
return nil , err
}
return body , nil
}
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