首先，我想做的事情：
- 我想通过电子邮件将我在 Remarkable（已转换）上的手写笔记发送到我的邮箱。
- 我用 getmail 检索我的邮箱并将邮件保存在本地。
- 然后我想将邮件（电子邮件格式）转换为文本。通过 webdav 将文本文件发送到我的 Nextcloud 服务器，以便该注释在应用程序中可用。
我发现以下命令非常好：
F=/path/to/file
reformime -e -s $(reformime -i <$F | fgrep 'content-type: text/plain' | head -n1 | cut -c 10- ) <$F > file.txt
上述命令适用于普通邮件客户端发送的电子邮件。 Remarkable 发送的电子邮件在转换时出现以下错误： Segmentation failure (core dumped)
客户的电子邮件摘录：
X-CMAE-Envelope:
MS4xfA2xbyQ//lzABNRHb8Owbn2q85OGHF5woA2zecQmWfP34ITLP1+7URNVzTP8FH22v0GsDm468r+OHNHUg2mXUPylSWAjPhu7os3WCo8tzghm1RWpN7U0
oz8YZDkiHRSOmCEYq3Vy8sw5QyTnqPEHp5Pi04lCBrhILKiGfkMCW/WeDhgBrlnoscipapZOym4H1IHf616HEG/OySE4QQRaUpg=
X-getmail-retrieved-from-mailbox: INBOX
----_com.samsung.android.email_11924222509547450
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: base64
TGVvbiBXYXJlIHZvbiBNaXI6LSBMb2dpdGVjaCBMZW5rcmFkIHQgSGFuZGVsLSBQUyA0IGlua2wu
IDIgY29udHJvbGxlci0gTGVub3ZvIE1vbml0b3JWb24gbWVpbmVtL21laW5lciBHYWxheHkgZ2Vz
ZW5kZXQ=
----_com.samsung.android.email_11924222509547450
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: base64
PGh0bWw+PGhlYWQ+PG1ldGEgaHR0cC1lcXVpdj0iQ29udGVudC1UeXBlIiBjb250ZW50PSJ0ZXh0
L2h0bWw7IGNoYXJzZXQ9VVRGLTgiPjwvaGVhZD48Ym9keSBkaXI9ImF1dG8iPkxlb24gV2FyZSB2
b24gTWlyOjxicj4tIExvZ2l0ZWNoIExlbmtyYWQgdCBIYW5kZWw8YnI+LSBQUyA0IGlua2wuIDIg
Y29udHJvbGxlcjxicj4tIExlbm92byBNb25pdG9yPGRpdj48YnI+PC9kaXY+PGRpdj48YnI+PC9k
aXY+PGRpdj48YnI+PC9kaXY+PGRpdj48YnI+PC9kaXY+PGRpdiBpZD0iY29tcG9zZXJfc2lnbmF0
dXJlIj48ZGl2IHN0eWxlPSJmb250LXNpemU6MTJweDtjb2xvcjojNTc1NzU3IiBkaXI9ImF1dG8i
PlZvbiBtZWluZW0vbWVpbmVyIEdhbGF4eSBnZXNlbmRldDwvZGl2PjwvZGl2PjxkaXY+PGJyPjwv
ZGl2PjwvYm9keT48L2h0bWw+
----_com.samsung.android.email_11924222509547450--
摘录自 Remarkable 的电子邮件：
X-CMAE-Envelope:
MS4xfNVk55TRNs2B6C8cpuJmkKcvMSRZwxUbpMZhZ7Y8lvumn8xQKEhAdfqgdtv2wCFb2LC7Gxv92llU3SvG1Ut5ElO+JO/4AQwXBNUmDk+lrwcnKvN807J8
w8yA8FUIN2wC5BtLNwazEb5tb12PQREN8jqRc1N3eIA4NpZPPcAx+ZwOpRY03yJn87lAAnzF7l75ZFwTxxLYKu8pZz/ATyZxQ1aFWX5Q7S9WNncfx6GPzK67
yFOrkkPC9honahTHu2RGig==
X-getmail-retrieved-from-mailbox: INBOX
DOCTYPE html>
html>
body>p>**This is the Note**/p>p>br/><p>/body>
/html>br>br>--br>Sent from my reMarkable paper tabletbr>Get yours at www.remarkable.combr>br>PS: You cannot reply to this emailbr>
来自 Remarkable 的消息具有 !DOCTYPE html 块。
我必须稍微编辑一下 HTML 部分，否则您将看不到它，因为页面会正确解释它。这是该命令无法转换的 HTML 块中的注释消息。
上面的命令是否可以转换两种类型？
非常感谢你问候布鲁诺
答案1
答案已编辑！
将以下脚本保存到文件“mail2text”中
用法:bash mail2text --help
#!/usr/bin/bash
declare mail_file output_file output_dir append_prefix\
section_ID section_mimeType section_charset\
choosen_Indices section_ID skip_RegExp section_charset conv_charset="UTF-8"\
command_name option report help\
stderrC=$'\e[38;2;240;80;0m' indexC=$'\e[38;2;0;200;0m' previewC=$'\e[38;2;200;200;0m'
declare -a sections contents opt_subArgs
declare -A skip_type=(["typeID"]=1 ["invert"]=0 ["ignoreCase"]=1 ["0"]="typeID" ["1"]="invert" ["2"]="ignoreCase")
declare -i i sections_L preview_chars=200 convHTMLToText=1 doConvCharset dontOverWrite=0 append_type append_digits=4 main_exit_code=-1 HTMLtoText_width=79
command_name=$(readlink -f "$0"); command_name=${command_name##*/}
if [[ $1 == "--help" ]]; then
help=$(cat << EOF
\e[38;2;123;183;51m\e[1;4mUsage:\e[39m\e[22;24;4:0m $command_name [\e[38;2;240;240;0m\e[3mOPTION...\e[39m\e[23m] [\e[38;2;240;240;0m\e[3mMAIL-FILE\e[39m\e[23m] [\e[38;2;240;240;0m\e[3mOUTPUT-FILE\e[39m\e[23m]
Extracts mail mimeType sections of text/plain or text/html and converts text/html to text/plain.
If more sections are found, let you choose the sections - \e[3mseparator ";" (x;y;...)\e[23m
If no OUTPUT-FILE is overhanded, writes to STDOUT.
\e[49m
\e[38;2;123;183;51m\e[1;4mDepends On:\e[39m\e[22;24;4:0m commands - reformime, html2text
\e[38;2;123;183;51m\e[1;4mOptions:\e[39m\e[22;24;4:0m
The option argument separator ':' can be escaped with '\\\\'.
Dont escape '\\\\' with '\\\\\\\\' to prohibit separator escaping and keep the literal meaning, it will count as double '\\\\''\\\\'. Use double quotes on part!
Double quotes will be removed at start and end position of splitted part. If option argument ends with '\\\\', use double quotes on the last part.
\e[3mArgument examples: $command_name -a \e[38;2;240;240;0m\e[3m'\e[39m1\e[38;2;240;240;0m\e[3m:\e[39mapp\\\\:en\\\\:d me\e[38;2;240;240;0m\e[3m:\e[39m\e[23m6\e[38;2;240;240;0m\e[3m'\e[39m or -a \e[38;2;240;240;0m\e[3m'\e[39m1\e[38;2;240;240;0m\e[3m:\e[39m"append me\\\\"\e[38;2;240;240;0m\e[3m:\e[39m6\e[38;2;240;240;0m\e[3m'\e[39m or \e[38;2;240;240;0m\e[3m'\e[39m1\e[38;2;240;240;0m\e[3m:\e[39m"app\\\\\\\\en\\\\\\\\:d me\\\\\\\\"\e[38;2;240;240;0m\e[3m'\e[39m
Argument parts: '1', 'app:en:d me', '6' - '1', 'append me\\\\', '6' - 1, 'app\\\\\\\\en\\\\:d me\\\\\\\\'\e[39m\e[23m
-\e[38;2;145;246;214ma\e[39m \e[38;2;240;240;0m\e[3mappend\e[39m\e[23m \e[38;2;103;134;250mSTR\e[39m ... do not overwrite existing file! - [\e[38;2;240;240;0m\e[3mtypeID\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m]:[\e[38;2;240;240;0m\e[3mprefix\e[39m\e[23m \e[38;2;103;134;250mSTR\e[39m]:[\e[38;2;240;240;0m\e[3mdigits\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m]
\e[38;2;240;240;0m\e[3mtypeID\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m [1-2]
1 ... append data to file using the defined prefix.
2 ... change filename by appending a continuing number at end,
respecting a filename extension. (filenameXXXX.ext)
\e[38;2;240;240;0m\e[3mprefix\e[39m\e[23m \e[38;2;103;134;250mSTR\e[39m optional (Standard: "")
prefix for appending mail section content.
\e[38;2;240;240;0m\e[3mdigits\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m optional (Standard: 4)
minimum digits of continuing number
-\e[38;2;145;246;214mc\e[39m \e[38;2;240;240;0m\e[3mconv_charset\e[39m\e[23m \e[38;2;103;134;250mSTR\e[39m ... convert section content to this charset. (Standard: UTF-8)
for supported charsets execute "iconv -l". The empty string ("") means keep charset.
-\e[38;2;145;246;214md\e[39m do not convert text/html to text/plain!
-\e[38;2;145;246;214mp\e[39m \e[38;2;240;240;0m\e[3mpreview_chars\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m ... character length of section content preview, if more sections are found! (Standard: 200)
-\e[38;2;145;246;214mr\e[39m \e[38;2;240;240;0m\e[3mskip_RegExp\e[39m\e[23m \e[38;2;103;134;250mSTR\e[39m ... GAWK regular expression pattern for skipping data in mail section content.
-\e[38;2;145;246;214mt\e[39m \e[38;2;240;240;0m\e[3mskip_type\e[39m\e[23m \e[38;2;103;134;250mSTR\e[39m ... define skip type - [\e[38;2;240;240;0m\e[3mtypeID\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m]:[\e[38;2;240;240;0m\e[3minvert\e[39m\e[23m \e[38;2;103;134;250mBOOL\e[39m]:[\e[38;2;240;240;0m\e[3mignoreCase\e[39m\e[23m \e[38;2;103;134;250mBOOL\e[39m]
\e[38;2;240;240;0m\e[3mtypeID\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m [1-2] (Standard: 1)
1 ... skip from first-match-start-position to section-content-end
or from section-content-start to first-match-start-position. (inverse skipping)
2 ... remove globally matches from section content
or print only globally matches from section content. (inverse skipping)
\e[38;2;240;240;0m\e[3minvert \e[38;2;103;134;250mBOOL\e[39m [0 or >0] optional (Standard: 0)
>0 ... invert skipping
\e[38;2;240;240;0m\e[3mignoreCase\e[39m\e[23m \e[38;2;103;134;250mBOOL\e[39m [0 or >0] optional (Standard: 1)
>0 ... ignore case
-\e[38;2;145;246;214mw\e[39m \e[38;2;240;240;0m\e[3mHTML_width\e[39m\e[23m \e[38;2;103;134;250mINT\e[39m ... By default, html2text formats the HTML documents for a screen width of 79 characters
GAWK RegExp description - https://www.gnu.org/software/gawk/manual/html_node/Regexp.html
For mimeType "text/html" the pattern search is executed on HTML, before converting to "text/plain".
\e[38;2;123;183;51m\e[1;4mExamples:\e[39m\e[22;24;4:0m
$command_name -p 300 -r 'hello' -t 1:1 [\e[38;2;240;240;0m\e[3mMAIL-FILE\e[39m\e[23m]
sets preview characters to 300 - A preview will be shown, if more sections are found.
sets a RegExp, which will find "hello" in content data,
sets typeID to 1 and invert to 1 - the data from section-content-start to first-match-start of "hello" will be skipped.
$command_name -r 'he+llo' -t 2 [\e[38;2;240;240;0m\e[3mMAIL-FILE\e[39m\e[23m]
sets a RegExp, which will find "hello", "heello", "heeello", ... in content data,
sets typeID to 2 - the matches on content data will be removed globally.
$command_name -r '[^\\\\n]*hello[^\\\\n]\\\\n' -t 2:1 [\e[38;2;240;240;0m\e[3mMAIL-FILE\e[39m\e[23m]
sets a RegExp, which will match a line with hello,
sets typeID to 2 and invert to 1 - only the globally matches on content data will be printed.
\e[48;2;245;0;10mBug reports to: https://unix.stackexchange.com/questions/773264/convert-e-mail-to-text-reformime\e[49m
EOF
); printf "%b" "$help" | less -rXP "Hit 'q' to exit ---"; exit
fi
str_split_ES ()
{
local -n LOC_ARR=$2; local -i LOC_i=${#LOC_ARR[*]}
local LOC_part LOC_partCarry=""
for LOC_part in $1$IFS; do
if [[ $LOC_part && ${LOC_part: -1} == '\' ]]; then
LOC_partCarry+=${LOC_part:0: -1}$IFS
else
LOC_part=${LOC_partCarry}${LOC_part%'"'};
LOC_ARR[LOC_i++]=${LOC_part#'"'}
LOC_partCarry=""
fi
done
[[ -z ${LOC_ARR[--LOC_i]} ]] && unset "LOC_ARR[LOC_i]";
}
echo -en "$stderrC" >/dev/tty; set -o noglob
while getopts "a:c:dp:r:t:w:" "option"; do
case $option in
"a") dontOverWrite=1; opt_subArgs=(); IFS=":" str_split_ES "$OPTARG" "opt_subArgs"; append_type=${opt_subArgs[0]}; append_prefix=${opt_subArgs[1]}; append_digits=${opt_subArgs[2]:-$append_digits};;
"c") conv_charset=$OPTARG;;
"d") convHTMLToText=0;;
"p") preview_chars=$OPTARG;;
"r") skip_RegExp=$OPTARG;;
"t") opt_subArgs=(); IFS=":" str_split_ES "$OPTARG" "opt_subArgs"; for ((i=0;i<${#opt_subArgs[*]};i++)); do skip_type[${skip_type[$i]}]=${opt_subArgs[i]}; done;;
"w") HTMLtoText_width=$OPTARG;;
"?") exit 2;;
esac
done
shift $((OPTIND-1)); [[ ${#*} -gt 2 ]] && { echo "$command_name - too many arguments after recognized options - allowed [MAIL-FILE] [OUTPUT-FILE]- check your options!" 1>&2 ; exit 2; }
mail_file=$1; output_file=$2;
if [[ $output_file ]]; then
output_dir=$(dirname "$output_file")'/'
[[ ! -d $output_dir ]] && mkdir -p "$output_dir"
fi
skip_text ()
{
awk -v skip_RegExp="$skip_RegExp" '
BEGIN {
RS="^$"; FS=""; skip_type='${skip_type[typeID]}'; skip_invert='${skip_type[invert]}'; skip_ic='${skip_type[ignoreCase]}';
section_mimeType="'"$section_mimeType"'"; section_charset="'"$section_charset"'"; convHTMLToText='$convHTMLToText'; conv_charset="'"$conv_charset"'";
}
{ if (section_mimeType=="text/html")
{
IGNORECASE=1;
if (conv_charset && conv_charset != section_charset)
{
gsub(/<meta *http-equiv[^>]*>/, "");
sub(/<head>/, "<head>\n<meta http-equiv=\"content-type\" content=\"text/html; charset=" conv_charset "\">");
}
else if (convHTMLToText && match($0, /<meta *http-equiv[^>]*charset/)==0)
sub(/<head>/, "<head>\n<meta http-equiv=\"content-type\" content=\"text/html; charset=" section_charset "\">");
}
if (skip_RegExp=="") { printf "%s", $0; exit }
IGNORECASE=skip_ic;
switch (skip_type)
{
case 1: match($0, skip_RegExp);
if (RSTART>0)
{
if (skip_invert) printf "%s", substr($0, RSTART, length($0)-RSTART+1);
else printf "%s", substr($0, 1, RSTART-1);
}
else printf "%s", $0;
break;
case 2: if (skip_invert)
{
text=$0; while (match(text, skip_RegExp))
{
printf "%s", substr(text, RSTART, RLENGTH);
text=substr(text, RSTART+RLENGTH, length(text)-RS-widthTART-RLENGTH+1);
}
}
else { gsub(skip_RegExp, ""); printf "%s", $0 }
break;
}
}'
}
convert_charset ()
{
if ((doConvCharset)); then echo -n "${contents[$1]}" | iconv -f "$section_charset" -t "$conv_charset"
else echo -n "${contents[$1]}"
fi
}
print_sectionContent ()
{
local conv_report="" data filename filename_wext filename_ext append_number_STR
local -i i pipe_failExit append_number
local -a pipe_exits
((main_exit_code<0)) && main_exit_code=0;
section_charset=${sections[$1]#*charset:}; section_charset=${section_charset%%$'\n'*}
section_charset=${section_charset//['"' ]/}; section_charset=${section_charset^^};
if [[ $conv_charset && $conv_charset != "$section_charset" ]]; then
doConvCharset=1; conv_report="charset:$conv_charset"
else doConvCharset=0
fi
if [[ ${sections[$1]} == *text/html* ]]; then
section_mimeType="text/html"
if ((convHTMLToText)); then
conv_report="text/plain-"$conv_report
data=$(convert_charset $1 | skip_text | html2text -width "$HTMLtoText_width" | iconv -c -f "${conv_charset:-$section_charset}" -t "${conv_charset:-$section_charset}"; echo -n ";${PIPESTATUS[*]}")
else
data=$(convert_charset $1 | skip_text; echo -n ";${PIPESTATUS[*]}")
fi
else
section_mimeType="text/plain"
data=$(convert_charset $1 | skip_text; echo -n ";${PIPESTATUS[*]}")
fi
: "${data%;*}"; i=${#_}; pipe_exits=(${data:i+1}); data=${data:0:i}
for ((i=0;i<${#pipe_exits[*]};i++)); do ((pipe_failExit=pipe_failExit | pipe_exits[i])); done
if ((pipe_failExit)); then
report+="pipe failed (command in pipe, exit status >0) - section [$(($1+1))] of mimeType ${section_mimeType}-charset:$section_charset!"$'\n'
return 4
else
if [[ -z $output_file ]]; then echo -ne "\e[1;0m" >/dev/tty; echo -n "$data"; echo -en "$stderrC" >/dev/tty;
elif [[ -f "$output_file" ]]; then
if ((dontOverWrite)); then
case $append_type in
1) [[ -z $append_prefix ]] && echo -n "$data" >> "$output_file" || echo -n "$append_prefix$data" >> "$output_file";;
2) filename=${output_file##*/}; filename_wext=${filename%"."*}; filename_ext=${filename:${#filename_wext}}
filename=${filename_wext%%*([0-9])};
append_number_STR=${filename_wext:${#filename}}; append_number=${append_number_STR##*([0])};
while :; do
((append_number++))
printf -v append_number_STR "%0.${append_digits}d" "$append_number"
output_file="$output_dir$filename$append_number_STR$filename_ext"
[[ ! -f $output_file ]] && break;
done
echo -n "$data" > "$output_file";;
*) echo "append typeID not found - stopped executing at mail-file < ${mail_file}" 1>&2 ; exit 255;;
esac
else echo -n "$data" >"$output_file"
fi
else echo -n "$data" >"$output_file"
fi
if (($?==0)); then
if [[ $conv_report ]]; then
[[ ${conv_report:${#conv_report}-1:1} == "-" ]] && conv_report=${conv_report:0:-1}
conv_report="converted to $conv_report "
fi
report+="section [$(($1+1))] of mimeType ${section_mimeType}-charset:$section_charset ${conv_report}written to ${output_file:-stdout}!"$'\n'
else
report+="write error - wasnt able to write section [$(($1+1))] of mimeType ${section_mimeType}-charset:$section_charset!"$'\n'
return 3
fi
fi
}
[[ -z $mail_file || ! -f $mail_file ]] && { echo "$command_name - mail-file < ${mail_file}"$'\n'"no mail file found!" 1>&2; exit 127; }
IFS=$'\x1e'
sections=($(reformime -i <"$mail_file"| { (($?)) && exit; grep -zoP "section[^\n]*\n[^\n]*text/(plain|html)\n([^\n]*\n[^\n])*harset:[^\n]*"; } | sed "s/\x00/\x1e/g"))
sections_L=${#sections[*]}
shopt -s extglob
for ((i=0;i<$sections_L;i++)); do
section_ID=${sections[i]%%$'\n'*}; section_ID=${section_ID#*: }
contents[i]=$(reformime -e -s "$section_ID" < "$mail_file")
done
case $sections_L in
0) echo "$command_name - mail-file < ${mail_file}"$'\n'"no mimeType text/plain or text/html sections found!" 1>&2 ; exit 5;;
1) IFS=":" print_sectionContent 0;;
*) echo $'\e[1;0mFound sections of mimeType text/(plain|html):\n-\e[44b' >/dev/tty
for ((i=0;i<$sections_L;i++)); do
echo -e "\n[$indexC$((i+1))\e[1;0m]${sections[i]}\n$previewC${contents[i]:0:$preview_chars}\e[1;0m" >/dev/tty
done
echo -ne "\nChoose section(s) [x] :\e7" >/dev/tty
while [[ -z $choosen_Indices || $choosen_Indices != +([0-9]*(;)) ]]; do echo -n $'\e8\e[0K' >/dev/tty; read choosen_Indices; done
echo -en "$stderrC" >/dev/tty; IFS=";"; for i in $choosen_Indices; do ((i>0 && i<=sections_L)) && { IFS=":" print_sectionContent $((i-1)); ((main_exit_code+=$?)); }; done ;;
esac
((main_exit_code<0)) && { report="try to enter a section index, that exists!\n"; main_exit_code=6; }
echo -en "\n$command_name - mail-file < ${mail_file}\n$report" 1>&2; echo -en "\e[1;0m" >/dev/tty; exit $main_exit_code