dousi9215
2014-01-14 21:24
浏览 142
已采纳

当某些行足够长而导致“ bufio.Scanner:令牌太长”错误时,如何在Go中逐行读取文本文件?

I have a text file where each line represents a JSON object. I am processing this file in Go with a simple for loop like this:

scanner := bufio.NewScanner(file)
for scanner.Scan() {
   jsonBytes = scanner.Bytes()
   var jsonObject interface{}
   err := json.Unmarshal(jsonBytes, &jsonObject)

   // do stuff with "jsonObject"...

}
if err := scanner.Err(); err != nil {
   log.Fatal(err)
}

When this code reaches a line with a particularly large JSON string (~67kb), I get the error message, "bufio.Scanner: token too long".

Is there an easy way to increase the max line size readable by NewScanner? Or is there another approach you can take altogether, when needing to read lines that are too large for NewScanner but are known to not be of unsafe size generally?

  • 写回答
  • 好问题 提建议
  • 追加酬金
  • 关注问题
  • 邀请回答

3条回答 默认 最新

相关推荐 更多相似问题