R编程中设置局部主机的Plumb

Question

为了熟悉这个工具，我在水管工上写了一些玩具API。阅读各种教程和文档以设置本地主机，建议使用以下行

library(plumber)
r = plumb("Apitest.R")
r$run(port = 1030, host = "0.0.0.0") # or r$run(port=8000)

#* Return the multiplication of two numbers
#* @param a Multiplier
#* @param b Multiplicand
#* @post /multiplication
function(a, b){
  as.numeric(a) * as.numeric(b)
}

当我运行代码(使用r$run(port = 1030, host = "0.0.0.0")或r$run(port=8000))时，会得到以下错误：

> plumb(file='APItest.R')$run()
    Error in stopOnLine(lineNum, file[lineNum], e) : 
      Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e): Error on line #4: '' - Error in stopOnLine(lineNum, file[lineNum], e

Answer 1

我最近也遇到了一个类似的问题。不幸的是，错误消息并不是很有用，而且这种行为也没有得到很好的记录。在我的例子中，问题是我从定义了端点的同一个脚本调用r$run(foo)，这导致了递归问题。希望这能帮上忙。