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我有从服务器读取电子邮件然后在将数据插入数据库之前解析它们的代码。

我正在使用 PHP 中的IMAP 扩展来帮助我解决这个问题。

这是我正在做的读取数据

//read new messages
private function _getNewMessages(){

    // Checks the inbox
    if ($messages = imap_search($this->conn,'ALL'))
    {
        // Sorts the messages newest first
        sort($messages);

        // Loops through the messages
        foreach ($messages as $id)
        {
            // Grabs the overview and body
            //$overview = imap_fetch_overview($this->conn, $id, 0);
            $struct = imap_fetchstructure($this->conn, $id, 0);
            $header = imap_headerinfo($this->conn, $id);
            $message = imap_fetchbody($this->conn, $id, 1);

            //decode the message
            if(isset($struct->encoding)){
                $message = $this->_decodeMessage($message, $struct->encoding);
            }


            $from = $header->from[0]->mailbox . '@' . $header->from[0]->host;
            $subject = $header->subject;    
            echo  $message;
        }
    }
    else
    {
        exit('No messages to process');
    }
}

我看到的问题是，当消息以值 0“7 位”编码时，它返回黑色。似乎解码无法正确解码消息。

我正在使用这个函数来解码 7 位

    // function to decode 7BIT encoded message
    private function _decode7Bit($text) {
        // If there are no spaces on the first line, assume that the body is
        // actually base64-encoded, and decode it.
        $lines = explode("\r\n", $text);
        $first_line_words = explode(' ', $lines[0]);
        if ($first_line_words[0] == $lines[0]) {
            $text = base64_decode($text);
        }

        // Manually convert common encoded characters into their UTF-8 equivalents.
        $characters = array(
                     '=20' => ' ', // space.
                     '=E2=80=99' => "'", // single quote.
                     '=0A' => "\r\n", // line break.
                     '=A0' => ' ', // non-breaking space.
                     '=C2=A0' => ' ', // non-breaking space.
                     "=\r\n" => '', // joined line.
                     '=E2=80=A6' => '…', // ellipsis.
                     '=E2=80=A2' => '•', // bullet.
        );

        // Loop through the encoded characters and replace any that are found.
        foreach ($characters as $key => $value) {
            $text = str_replace($key, $value, $text);
        }

        return $text;
    }

我也尝试过这种方法来解码消息

/**
 * decoding 7bit strings to ASCII
 * @param string $text
 * @return string
 */
function decode7bit($text){
        $ret = '';
        $data = str_split(pack('H*', $text));

        $mask = 0xFF;
        $shift = 0;
        $carry = 0;
        foreach ($data as $char) {
                if ($shift == 7) {
                        $ret .= chr($carry);
                        $carry = 0;
                        $shift = 0;
                }

                $a      =       ($mask >> ($shift+1)) & 0xFF;
                $b      =       $a ^ 0xFF;

                $digit = ($carry) | ((ord($char) & $a) << ($shift)) & 0xFF;
                $carry = (ord($char) & $b) >> (7-$shift);
                $ret .= chr($digit);

                $shift++;
        }
        if ($carry) $ret .= chr($carry);
        return $ret;
}

但消息是空白的。

我在这里做错了什么？我可以做些什么来确保消息被正确解码？

谢谢

4

2 回答 2

2

根据您描述的字符编码，您的文本似乎是使用带引号的可打印编码的。

尝试使用解码：

echo quoted_printable_decode($text);
于 2015-04-29T23:21:51.787 回答
1

我弄清楚了这个问题。我检查消息是否是 base64 编码的方式不好。所以我把我的功能改成这个

private function _isEncodedBase64($date){

        if ( base64_encode(base64_decode($data)) === $data){
            return true;
        }

        return false;
    }

    // function to decode 7BIT encoded message
    private function _decode7Bit($text) {
        // If there are no spaces on the first line, assume that the body is
        // actually base64-encoded, and decode it.      
        if($this->_isEncodedBase64($text)){
            $text = base64_decode($text);
        } 


        // Manually convert common encoded characters into their UTF-8 equivalents.
        $characters = array(
                     '=20' => ' ', // space.
                     '=E2=80=99' => "'", // single quote.
                     '=0A' => "\r\n", // line break.
                     '=A0' => ' ', // non-breaking space.
                     '=C2=A0' => ' ', // non-breaking space.
                     "=\r\n" => '', // joined line.
                     '=E2=80=A6' => '…', // ellipsis.
                     '=E2=80=A2' => '•', // bullet.
        );

        // Loop through the encoded characters and replace any that are found.
        foreach ($characters as $key => $value) {
            $text = str_replace($key, $value, $text);
        }
        return $text;
    }
于 2015-04-29T21:06:16.350 回答