I have been looking for the answer to this question and so far have found everything around it, but not something that can help me figure out what I am doing wrong. I pull an oracle report every morning that send an email with the report output as a link to a google sheet. I can match every value that I am looking for except for the link value, which matches when I use regex.101. the script I am using is a modified version of the one I have seen in several posts and it works EXCEPT when I try to match the link.

function parseEm(start) {
  start = start || 0;
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheetByName("Results");
  var label = sheet.getRange('B2').getValue();
 // var threads = GmailApp.getInboxThreads(start, 100);
  //var sheet = SpreadsheetApp.getActiveSheet();
  var threads = GmailApp.search("Label:" + label, 1, 5)
  for (var i = 0; i < threads.length; i++) {

    // Get messages in search thread
    // Get the plain text body of the email message
    var tmp,
      message = threads[i].getMessages()[0],
      subject = message.getSubject(),
      content = message.getPlainBody();

   
    // match each requirement using constant values paired with regex
    
    if (content) {
     //Request ID: 
      tmp = content.match(/Request ID:\s*([A-Za-z0-9\s]+)(\r?\n)/);
      var ID = (tmp && tmp[1]) ? tmp[1].trim() : 'No report id';
     //Report Name: 
      tmp = content.match(/Report Name: \s*([A-Za-z0-9@.]+)/);
      var Name = (tmp && tmp[1]) ? tmp[1].trim() : 'No report name';
     //Report Link : 
      tmp = content.match(/Report Link: (http|ftp|https):\/\/[\w-]+(\.[\w-]+)+([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])?/);
      Logger.log(tmp);
       var link = (tmp && tmp[1]) ? tmp[1] : 'No link';
      Logger.log(link)
      
       //write information to sheet
      //sheet.appendRow([ID, Name, subject, link]);

    } // End if

  } // End for loop
}

The data to match is as follows only modified to take out the report name and details for security purposes. I can pull everything else just fine and it writes to the sheet, but the link returns as No link and Logger returns null.

Request ID: 854632157
Report Name: report Name and Invoice_Number_854632157
Report Link : https://drive.google.com/open?id=id of file stored in drive

I can put the entire email contents into Regex and it matches perfectly as long as I don't add in the required '/' before and after. but as soon as I run the program in apps script, it returns everything but the last value. I just have one request... Even if you think this is a duplicate, please try to answer instead of just writing duplicate... trust me I have looked and I can't figure out what I am doing wrong, and I am pretty sure it is in the last regex parameter, but I can't figure it out.