Node.js: Regular Expression To Get "From: " and "To: "
Solution 1
Try this:
Code:
//var rePattern = new RegExp(/^Received:(.*)$/);
var rePattern = new RegExp(/^Subject:(.*)$/);
var arrMatches = strText.match(rePattern);
Result:
arrMatches[0] -> Subject: test
arrMatches[1] -> test
Solution 2
This question was just suggested to me (even though it's quite old!?) and I think the accepted answer doesn't exactly do what was asked for (get every field + body), so I thought I'll share this...
To get each header and its value there is a quite simple regex (http://regexr.com/3e60k) with two capture groups, that also allows line breaks within a value (if indented):
var pattern = /(.+):\s(.+(?:\n +)?.+)?/g;
The pairs can be retrieved like
var match;
while (match = pattern.exec(string)) {
console.log(match[1] + ": " match[2]);
}
It's even simpler to get the body (http://regexr.com/3e60h), because it has to be separated from the headers with two new-line characters:
var body = string.match(/\n\n([\s\S]+)/)[1];
That matches anything after the two \n
(whitespace and non-whitespace).
See this fiddle for a complete example: http://es6fiddle.net/issocwc9/
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donald
Updated on September 07, 2020Comments
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donald over 3 years
Given this text file:
Received: from unknown (HELO aws-bacon-delivery-svc-iad-1007.vdc.g.com) ([10.146.157.151]) by na-mm-outgoing-6102-bacon.iad6.g.com with ESMTP; 12 Apr 2011 14:30:47 +0000 Return-Path: 0000012f4a2a0037-528dbafb-e773-44be-bef5-07d8f63e6aee-000000@email-bounces.g.com Date: Tue, 12 Apr 2011 14:42:37 +0000 From: [email protected] To: [email protected] Message-ID: <0000012f4a2a0037-528dbafb-e773-44be-bef5-07d8f63e6aee-000000@email.g.com> Subject: test Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-AWS-Outgoing: 199.255.192.79 testing123
I want to get every field (Return-path, Date, From, To, etc.) as well as the body ("testing123).
I've tried matching using:
var bodyRegex = /[\n]Subject: (.+)[\n](.+)/
but I get empty value.