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I need to detect corrupted text file where there are invalid (non-ASCII) utf-8, Unicode or binary characters.
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iconv -f utf-8 -t utf-8 -c file.csv 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?
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Open the file in Notepad. Click 'Save As...'. In the 'Encoding:' combo box you will see the current file format. Yes, I opened the file in notepad and selected the UTF-8 format and saved it.
This error is created when the uploaded file is not in a UTF-8 format. UTF-8 is the dominant character encoding format on the World Wide Web. This error occurs because the software you are using saves the file in a different type of encoding, such as ISO-8859, instead of UTF-8.
The Difference Between Unicode and UTF-8Unicode is a character set. UTF-8 is encoding. Unicode is a list of characters with unique decimal numbers (code points).
To identify the Non Unicode characters we can use either Google Chrome or Mozilla firefox browser by just dragging and dropping the file to the browser. Chrome will show us only the row and column number of the .
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 Explanation (from grep man page):
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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I would grep for non ASCII characters.
With GNU grep with pcre (due to -P, not available always. On FreeBSD you can use pcregrep in package pcre2) you can do:
grep -P "[\x80-\xFF]" file Reference in How Do I grep For all non-ASCII Characters in UNIX. So, in fact, if you only want to check whether the file contains non ASCII characters, you can just say:
if grep -qP "[\x80-\xFF]" file ; then echo "file contains ascii"; fi # ^ # silent grep To remove these characters, you can use:
sed -i.bak 's/[\d128-\d255]//g' file This will create a file.bak file as backup, whereas the original file will have its non ASCII characters removed. Reference in Remove non-ascii characters from csv.
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