How to use MergeEmailLists method of email Package

Best Syzkaller code snippet using email.MergeEmailLists

parser.go

Source:parser.go

...70		} else {71			ccList = append(ccList, cleaned)72		}73	}74	ccList = MergeEmailLists(ccList)75	body, attachments, err := parseBody(msg.Body, msg.Header)76	if err != nil {77		return nil, err78	}79	bodyStr := string(body)80	patch, cmd, cmdArgs := "", "", ""81	if !fromMe {82		for _, a := range attachments {83			_, patch, _ = ParsePatch(string(a))84			if patch != "" {85				break86			}87		}88		if patch == "" {89			_, patch, _ = ParsePatch(bodyStr)90		}91		cmd, cmdArgs = extractCommand(body)92	}93	link := ""94	if match := groupsLinkRe.FindStringSubmatchIndex(bodyStr); match != nil {95		link = bodyStr[match[2]:match[3]]96	}97	email := &Email{98		BugID:       bugID,99		MessageID:   msg.Header.Get("Message-ID"),100		Link:        link,101		Subject:     msg.Header.Get("Subject"),102		From:        from[0].String(),103		Cc:          ccList,104		Body:        string(body),105		Patch:       patch,106		Command:     cmd,107		CommandArgs: cmdArgs,108	}109	return email, nil110}111// AddAddrContext embeds context into local part of the provided email address using '+'.112// Returns the resulting email address.113func AddAddrContext(email, context string) (string, error) {114	addr, err := mail.ParseAddress(email)115	if err != nil {116		return "", fmt.Errorf("failed to parse %q as email: %v", email, err)117	}118	at := strings.IndexByte(addr.Address, '@')119	if at == -1 {120		return "", fmt.Errorf("failed to parse %q as email: no @", email)121	}122	addr.Address = addr.Address[:at] + "+" + context + addr.Address[at:]123	return addr.String(), nil124}125// RemoveAddrContext extracts context after '+' from the local part of the provided email address.126// Returns address without the context and the context.127func RemoveAddrContext(email string) (string, string, error) {128	addr, err := mail.ParseAddress(email)129	if err != nil {130		return "", "", fmt.Errorf("failed to parse %q as email: %v", email, err)131	}132	at := strings.IndexByte(addr.Address, '@')133	if at == -1 {134		return "", "", fmt.Errorf("failed to parse %q as email: no @", email)135	}136	plus := strings.LastIndexByte(addr.Address[:at], '+')137	if plus == -1 {138		return email, "", nil139	}140	context := addr.Address[plus+1 : at]141	addr.Address = addr.Address[:plus] + addr.Address[at:]142	return addr.String(), context, nil143}144// extractCommand extracts command to syzbot from email body.145// Commands are of the following form:146// ^#syz cmd args...147func extractCommand(body []byte) (cmd, args string) {148	cmdPos := bytes.Index(append([]byte{'\n'}, body...), []byte("\n"+commandPrefix))149	if cmdPos == -1 {150		return151	}152	cmdPos += len(commandPrefix)153	cmdEnd := bytes.IndexByte(body[cmdPos:], '\n')154	if cmdEnd == -1 {155		cmdEnd = len(body) - cmdPos156	}157	cmdLine := strings.TrimSpace(string(body[cmdPos : cmdPos+cmdEnd]))158	if cmdLine == "" {159		return160	}161	split := strings.Split(cmdLine, " ")162	cmd = split[0]163	if len(split) > 1 {164		args = strings.TrimSpace(strings.Join(split[1:], " "))165	}166	return167}168func parseBody(r io.Reader, headers mail.Header) (body []byte, attachments [][]byte, err error) {169	mediaType, params, err := mime.ParseMediaType(headers.Get("Content-Type"))170	if err != nil {171		return nil, nil, fmt.Errorf("failed to parse email header 'Content-Type': %v", err)172	}173	disp, _, _ := mime.ParseMediaType(headers.Get("Content-Disposition"))174	if disp == "attachment" {175		// Note: mime package handles quoted-printable internally.176		if strings.ToLower(headers.Get("Content-Transfer-Encoding")) == "base64" {177			r = base64.NewDecoder(base64.StdEncoding, r)178		}179		attachment, err := ioutil.ReadAll(r)180		if err != nil {181			return nil, nil, fmt.Errorf("failed to read email body: %v", err)182		}183		return nil, [][]byte{attachment}, nil184	}185	if mediaType == "text/plain" {186		body, err := ioutil.ReadAll(r)187		if err != nil {188			return nil, nil, fmt.Errorf("failed to read email body: %v", err)189		}190		return body, nil, nil191	}192	if !strings.HasPrefix(mediaType, "multipart/") {193		return nil, nil, nil194	}195	mr := multipart.NewReader(r, params["boundary"])196	for {197		p, err := mr.NextPart()198		if err == io.EOF {199			return body, attachments, nil200		}201		if err != nil {202			return nil, nil, fmt.Errorf("failed to parse MIME parts: %v", err)203		}204		body1, attachments1, err1 := parseBody(p, mail.Header(p.Header))205		if err1 != nil {206			return nil, nil, err1207		}208		if body == nil {209			body = body1210		}211		attachments = append(attachments, attachments1...)212	}213}214// MergeEmailLists merges several email lists removing duplicates and invalid entries.215func MergeEmailLists(lists ...[]string) []string {216	const (217		maxEmailLen = 1000218		maxEmails   = 50219	)220	merged := make(map[string]bool)221	for _, list := range lists {222		for _, email := range list {223			addr, err := mail.ParseAddress(email)224			if err != nil || len(addr.Address) > maxEmailLen {225				continue226			}227			merged[addr.Address] = true228		}229	}...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.