I am working on a JS/JQuery based tool to review and analyze Internet Email Headers. The tools I have created before have relied on the presence of a New Line delimiter. From time to time, I get a customer that has sent in Internet Headers that have been Copy and Pasted enough times that the
or
and no longer read. Often substituted by \s\s or just \s. Hence there become no simple, or good way to find each of the lines.
That is exactly what I am trying to do. Given Internet Headers that may or may not contain the proper EOL, how can I capture all the lines or capture the various elements (Received:, X-Headers:, Message-ID:, To:, From:, Subject:, Date:).
Here is a Fiddle I have been working on: https://jsfiddle.net/Twisty/0n5tmm6L/
Snippet
$("#clean-header").click(function(e) {
e.preventDefault();
if ($("#header-1").val() === "") {
$("#error").html("No headers submitted.");
return false;
}
$("#error").html("");
var textLines = $("#header-1").val().split('
');
if (textLines.length > 1) {
console.log("Found " + textLines.length + " Lines ('\
') in headers.");
return false;
} else {
console.log("No EOL found in Headers. Seeking 'Received:'.");
var s1 = /(Received):\s?from\s(.+?)\s(by.+?);\s(.+?,\s[0-9]{2}\s[a-z]{3}\s[0-9]{4}\s\d{2}:\d{2}:\d{2}.+?)\s{2}/ig;
var match, received = [];
var line = $("#header-1").val();
while (match = s1.exec(line)) {
received.push({
"from": match[2],
"by": match[3],
"stamp": match[4]
});
}
console.log("Found ", received.length, " Received Lines.");
}
});
I'm not afraid to push this to PHP with Pear and use the IMAP library to do this. I was just hoping to do it in the browser without having to involve the server.
In the absence of
, I was hoping to make a few passes with regular expressions like the following:
/(Received):\s?(from.+?)\s(by.+?);\s(.+?,\s[0-9]{2}\s[a-z]{3}\s[0-9]{4}\s\d{2}:\d{2}:\d{2}.+?)\s{2}/ig
/(X-.+?):(.+?)\s\s/ig
/(Reply-To|Return-Path|From):.+?<(.+?)>\s{2}/ig
/(To):.+?<(.+?)>\s{2}/ig
I never know if what the EOL will be, if anything. I have also hunted to see if there are any good add-ons or libraries that already do this. So far, not seen any. Suggestions greatly welcome. Alternatives also welcome.
