Question

我有一个如下所示的BASH脚本：

cat limit_mail.out | while read num email limit orders; do
    echo "Sending mail to '$email'"
    printf "$email_template" "$email" "$num" "$limit" "$orders" |
    sendmail -oi -t
done

如何进行此操作，以便在发送电子邮件时，将电子邮件地址与日期和时间一起保存在文本文件中，然后进行检查，以确保没有电子邮件地址收到超过1 e- 24小时内邮寄？

Answer 1

一种方法是为每个收件人创建一个文件，并使用该文件的时间戳。

MAIL_TIMESTAMPS=/var/cache/mailstamps
mkdir "$MAIL_TIMESTAMPS"

cat limit_mail.out | while read num email limit orders; do
    echo "Sending mail to '$email'"
    email_hash="$(md5sum <<< "$email" | cut -d' ' -f1)";
    # Check that a timestamp file doesn't exist, or that it was modified over 24h ago
    if ! test -n "$(find "$MAIL_TIMESTAMPS" -mtime -1 -name "$email_hash")"; then
      touch "$MAIL_TIMESTAMPS/$email_hash" # Update timestamp
      printf "$email_template" "$email" "$num" "$limit" "$orders" |
      sendmail -oi -t
    fi
done

修改：我已添加了电子邮件地址的散列。无论如何，这是我打算做的事情，但是Aleks-Daniel's code for that非常简洁，以至于我在这里借了它，只从sha256sum改为md5sum。 MD5速度更快，虽然它有潜在的问题我不认为它们会成为问题（当然你可以自由选择）。哈希还避免了特殊字符的问题，这会扰乱查找文件名的匹配。

Answer 2

在文件中使用时间戳：

DELAY_FOLDER='myTempFolder/'
DELAY=$((24*60*60)) # one day

while read num email limit orders; do
    echo "Sending mail to '$email'"
    if [[ -f $DELAY_FOLDER/$email ]] && (( $(cat "$DELAY_FOLDER/$email") + DELAY > $(date +%s) )); then
        echo "email has been sent already"
    else
        printf "$email_template" "$email" "$num" "$limit" "$orders" | sendmail -oi -t
        echo "$(date +%s)" > "$DELAY_FOLDER/$email"
    fi
done < limit_mail.out

此外，如果您不希望任何人查看临时文件夹中的电子邮件地址，您可以使用md5或sha sum来覆盖您的地址。像这样：

DELAY_FOLDER='myTempFolder/'
DELAY=$((24*60*60)) # one day

while read num email limit orders; do
    echo "Sending mail to '$email'"
    emailsha=$(sha256sum <<< "$email" | cut -d' ' -f1)
    if [[ -f $DELAY_FOLDER/$emailsha ]] && (( $(cat "$DELAY_FOLDER/$emailsha") + DELAY > $(date +%s) )); then
        echo "email has been sent already"
    else
        printf "$email_template" "$email" "$num" "$limit" "$orders" | sendmail -oi -t
        echo "$(date +%s)" > "$DELAY_FOLDER/$emailsha"
    fi
done < limit_mail.out

BASH忽略过去24小时内发送过电子邮件的电子邮件地址

2 个答案: