如何在文本文件中检测到无效的utf8 Unicode/二进制文件 [英] how to detect invalid utf8 unicode/binary in a text file

问题描述

我需要检测损坏的文本文件，其中存在无效的(非ASCII)utf-8，Unicode或二进制字符.

I need to detect corrupted text file where there are invalid (non-ASCII) utf-8, Unicode or binary characters.

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我尝试过的事情:

iconv -f utf-8 -t utf-8 -c file.csv 

这会将文件从utf-8编码转换为utf-8编码，并且-c用于跳过无效的utf-8字符.但是最后那些非法字符仍然被打印出来.在Linux或其他语言上的bash中还有其他解决方案吗?

this converts a file from utf-8 encoding to utf-8 encoding and -c is for skipping invalid utf-8 characters. However at the end those illegal characters still got printed. Are there any other solutions in bash on linux or other languages?

推荐答案

假定您的语言环境设置为UTF-8(请参见 locale 输出)，可以很好地识别无效的UTF-8序列:

Assuming you have your locale set to UTF-8 (see locale output), this works well to recognize invalid UTF-8 sequences:

grep -axv '.*' file.txt

说明(来自 grep手册页):

Explanation (from grep man page):

• -a，--text :将文件视为文本，必须防止grep一旦找到无效的字节序列(不是utf8)就中止
• -v，--invert-match :反转显示不匹配行的输出
• -x'.*'(-line-regexp ):表示匹配包含任何utf8字符的完整行.

• -a, --text: treats file as text, essential prevents grep to abort once finding an invalid byte sequence (not being utf8)
• -v, --invert-match: inverts the output showing lines not matched
• -x '.*' (--line-regexp): means to match a complete line consisting of any utf8 character.

因此，将输出，其中包含无效的非utf8字节序列的行，其中包含行(因为-v倒置)

Hence, there will be output, which is the lines containing the invalid not utf8 byte sequence containing lines (since inverted -v)

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