Question

我正在尝试使用http.get（字符串）下载af图片，其中字符串是url。字符串是未知的，每天都在变化。我把那个过去覆盖了。如果我打印字符串并将其粘贴到http.get中它可以正常工作。为什么http.get不关心变量字符串？

require 'net/http'
Net::HTTP.start("apod.nasa.gov") { |http|
  resp = http.get("/apod/")
  resp.body.each{|line|
  if(line =~ /.jpg/)
    line.sub!("<a href=","")
    line.gsub!("\"","")
    resp = http.get(line)
    open("pic.jpg", "wb") { |file|
       file.write(resp.body)
    }
    break;
  end
  }
}

sub with

    resp = http.get('/image/1011/cygnusNeb_geissinger1200.jpg')

它有效......

Answer 1

好的，现在就明白了。字符串行应该是chomped

require 'net/http'
Net::HTTP.start("apod.nasa.gov") { |http|
  resp = http.get("/apod/")
  resp.body.each{|line|
  if(line =~ /.jpg/)
    line.sub!("<a href=","")
    line.gsub!("\"","")
    line = "/" + line.chomp
    resp = http.get(line)
    open("apod.jpg", "wb") { |file|
       file.write(resp.body)
    }
    break;
  end
  }
}

带字符串的http.get

1 个答案: