| [79a0317] | 1 | .Dd April 5, 2016
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| 2 | .Dt he 1
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| 3 | .Sh NAME
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| 4 | .Nm he
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| 5 | .Nd encode/decode HTML entities just like a browser would
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| 6 | .Sh SYNOPSIS
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| 7 | .Nm
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| 8 | .Op Fl -escape Ar string
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| 9 | .br
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| 10 | .Op Fl -encode Ar string
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| 11 | .br
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| 12 | .Op Fl -encode Fl -use-named-refs Fl -everything Fl -allow-unsafe Ar string
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| 13 | .br
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| 14 | .Op Fl -decode Ar string
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| 15 | .br
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| 16 | .Op Fl -decode Fl -attribute Ar string
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| 17 | .br
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| 18 | .Op Fl -decode Fl -strict Ar string
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| 19 | .br
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| 20 | .Op Fl v | -version
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| 21 | .br
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| 22 | .Op Fl h | -help
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| 23 | .Sh DESCRIPTION
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| 24 | .Nm
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| 25 | encodes/decodes HTML entities in strings just like a browser would.
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| 26 | .Sh OPTIONS
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| 27 | .Bl -ohang -offset
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| 28 | .It Sy "--escape"
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| 29 | Take a string of text and escape it for use in text contexts in XML or HTML documents. Only the following characters are escaped: `&`, `<`, `>`, `"`, and `'`.
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| 30 | .It Sy "--encode"
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| 31 | Take a string of text and encode any symbols that aren't printable ASCII symbols and that can be replaced with character references. For example, it would turn `©` into `©`, but it wouldn't turn `+` into `+` since there is no point in doing so. Additionally, it replaces any remaining non-ASCII symbols with a hexadecimal escape sequence (e.g. `𝌆`). The return value of this function is always valid HTML.
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| 32 | .It Sy "--encode --use-named-refs"
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| 33 | Enable the use of named character references (like `©`) in the output. If compatibility with older browsers is a concern, don't use this option.
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| 34 | .It Sy "--encode --everything"
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| 35 | Encode every symbol in the input string, even safe printable ASCII symbols.
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| 36 | .It Sy "--encode --allow-unsafe"
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| 37 | Encode non-ASCII characters only. This leaves unsafe HTML/XML symbols like `&`, `<`, `>`, `"`, and `'` intact.
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| 38 | .It Sy "--encode --decimal"
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| 39 | Use decimal digits rather than hexadecimal digits for encoded character references, e.g. output `©` instead of `©`.
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| 40 | .It Sy "--decode"
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| 41 | Takes a string of HTML and decode any named and numerical character references in it using the algorithm described in the HTML spec.
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| 42 | .It Sy "--decode --attribute"
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| 43 | Parse the input as if it was an HTML attribute value rather than a string in an HTML text content.
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| 44 | .It Sy "--decode --strict"
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| 45 | Throw an error if an invalid character reference is encountered.
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| 46 | .It Sy "-v, --version"
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| 47 | Print he's version.
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| 48 | .It Sy "-h, --help"
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| 49 | Show the help screen.
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| 50 | .El
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| 51 | .Sh EXIT STATUS
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| 52 | The
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| 53 | .Nm he
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| 54 | utility exits with one of the following values:
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| 55 | .Pp
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| 56 | .Bl -tag -width flag -compact
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| 57 | .It Li 0
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| 58 | .Nm
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| 59 | did what it was instructed to do successfully; either it encoded/decoded the input and printed the result, or it printed the version or usage message.
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| 60 | .It Li 1
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| 61 | .Nm
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| 62 | encountered an error.
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| 63 | .El
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| 64 | .Sh EXAMPLES
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| 65 | .Bl -ohang -offset
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| 66 | .It Sy "he --escape '<script>alert(1)</script>'"
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| 67 | Print an escaped version of the given string that is safe for use in HTML text contexts, escaping only `&`, `<`, `>`, `"`, and `'`.
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| 68 | .It Sy "he --decode '©𝌆'"
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| 69 | Print the decoded version of the given HTML string.
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| 70 | .It Sy "echo\ '©𝌆'\ |\ he --decode"
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| 71 | Print the decoded version of the HTML string that gets piped in.
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| 72 | .El
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| 73 | .Sh BUGS
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| 74 | he's bug tracker is located at <https://github.com/mathiasbynens/he/issues>.
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| 75 | .Sh AUTHOR
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| 76 | Mathias Bynens <https://mathiasbynens.be/>
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| 77 | .Sh WWW
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| 78 | <https://mths.be/he>
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