在 PDI 中，您需要接收行，并在下一步中处理它们.

In PDI, you need to receive rows, and process them in the next step.

对于这种情况，如论坛所述，您首先需要生成行"步骤，以至少调用一次 REST 网络服务.

For this case, as stated in the forum, you first need the "GENERATE ROWS" step, to make at least one call to the REST webservice.

记住只生成 1 行，否则，您将对 REST 网络服务进行 X 次调用.

Remember to generate only 1 row, else, you will make a X number of calls to the REST webservice.

然后，在REST CLIENT"步骤中，选择在属性Accept URL from field"中生成带有 URL 的行的字段.

Then, in the "REST CLIENT" step, choose the field that is generating the row with the URL in the attribute "Accept URL from field".

希望有帮助.