bblimke/webmock · error · ArgumentError

Must provide either data or a filename when doing a PUT or P

Error message

Must provide either data or a filename when doing a PUT or POST

What it means

Error "Must provide either data or a filename when doing a PUT or POST" thrown in bblimke/webmock.

Source

Thrown at lib/webmock/http_lib_adapters/patron_adapter.rb:83

              raise ArgumentError.new("Unable to open specified file.")
            end
          end
        end

        def self.build_request_signature(req)
          uri = WebMock::Util::URI.heuristic_parse(req.url)
          uri.path = uri.normalized_path.gsub("[^:]//","/")

          if [:put, :post, :patch].include?(req.action)
            if req.file_name
              if !File.exist?(req.file_name) || !File.readable?(req.file_name)
                raise ArgumentError.new("Unable to open specified file.")
              end
              request_body = File.read(req.file_name)
            elsif req.upload_data
              request_body = req.upload_data
            else
              raise ArgumentError.new("Must provide either data or a filename when doing a PUT or POST")
            end
          end

          headers = req.headers

          if req.credentials
            headers['Authorization'] = WebMock::Util::Headers.basic_auth_header(req.credentials)
          end

          request_signature = WebMock::RequestSignature.new(
            req.action,
            uri.to_s,
            body: request_body,
            headers: headers
          )
          request_signature
        end

View on GitHub (pinned to b187df8827)

When it happens

Trigger: Thrown at lib/webmock/http_lib_adapters/patron_adapter.rb:83 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of bblimke/webmock@b187df8827 (2026-08-23). Data as JSON: /api/errors/39fb966abd0ff197. Report an issue: GitHub.