User-Agent header is sent only on requests to /api/server/version

[valhristov]

Description

The /api/server/version is the first request made to SonarQube and SonarScanner.MSBuild.exe sends all required headers with it. All subsequent requests do not send all headers, including User-Agent.

The reason for the problem is that WebClient is clearing the following headers after each request: Accept, Connection, Content-Type, Expect, Referer, User-Agent. We need to set them before each request, not only the first time WebClient is created.

Repro steps

• Setup the HTTP traffic capture.
• Execute SonarScanner.MSBuild.exe begin
• The HTTP traffic shows that UserAgent header is sent only on the /api/server/version request.

Expected behavior

User-Agent is sent with all requests.

Known workarounds

None.

Related information

• Scanner for MSBuild Version 4.1
• Usage: Any