[JENKINS-69215] When specifying proxyAuthentication, plugin creates an Authorization header instead of a Proxy-Authorization header

[jenkins-infra-bot]

When utilizing httpRequest with an httpProxy defined along with proxyAuthentication

httpRequest(url: "https://mytarget.contoso.com", httpProxy: 'http://my.authenticated.proxy.com:8080', proxyAuthentication: 'CREDENTIALS' ) 

The plugin currently creates a request that defines an basic Authorization header with the values inside.

Authorization: Basic Rk9POkJBUg== 

The proxy does not know what to do with this and responds with a 407 challenge back.

If I perform the same request utilizing curl I can see that it is constructing a Proxy-Authorization header that the proxy accepts and allows the traffic through.

withCredentials([usernamePassword(credentialsId: 'CREDENTIALS', passwordVariable: 'PASSWORD', usernameVariable: 'USERNAME')]) {  sh (returnStdout: true, script: "curl -U "$USERNAME:$PASSWORD" -x http://my.authenticated.proxy.com:8080 -s -L https://mytarget.contoso.com")} 

Proxy-Authorization: Basic Rk9POkJBUg==

 

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Originally reported by jakauppila, imported from: When specifying proxyAuthentication, plugin creates an Authorization header instead of a Proxy-Authorization header

• assignee: janario
• status: Open
• priority: Major
• component(s): http-request-plugin
• resolution: Unresolved
• votes: 1
• watchers: 2
• imported: 20260702-081740

Raw content of original issue

When utilizing httpRequest with an httpProxy defined along with proxyAuthentication

httpRequest(url: "https://mytarget.contoso.com", httpProxy: 'http://my.authenticated.proxy.com:8080', proxyAuthentication: 'CREDENTIALS' ) 

The plugin currently creates a request that defines an basic Authorization header with the values inside.

Authorization: Basic Rk9POkJBUg== 

The proxy does not know what to do with this and responds with a 407 challenge back.
If I perform the same request utilizing curl I can see that it is constructing a Proxy-Authorization header that the proxy accepts and allows the traffic through.

withCredentials([usernamePassword(credentialsId: 'CREDENTIALS', passwordVariable: 'PASSWORD', usernameVariable: 'USERNAME')]) {  sh (returnStdout: true, script: "curl -U "$USERNAME:$PASSWORD" -x http://my.authenticated.proxy.com:8080 -s -L https://mytarget.contoso.com")} 


Proxy-Authorization: Basic Rk9POkJBUg==


 

• environment: http-request-plugin 1.14