C# 具有包含图像的HTML正文的日历邀请
我很难让我的图像显示为包含日历附件（iCal）的邮件的HTML正文的一部分 我试图做的是： 发送outlook可识别且包含HTML正文（也显示在outlook 2013中）的日历邀请。HTML应该内联显示页眉和页脚图像 我的代码在gmail中查看时可以正常工作，但它不会在Outlook中显示图像，而是在我希望实际显示图像的正文位置显示“header.jpg”和“footer.jpg” 我已经尝试了对这个代码库的很多修改-要么忽略日历邀请部分（然后图像工作），要么日历邀请部分工作，图像不显示，而是被双击时打开良好的“header.jpg”和“screen.jpg”文件替换。我是否可以绕过此问题并在Outlook中内联显示图像 以下是我正在使用的代码（截取的无关内容）：C# 具有包含图像的HTML正文的日历邀请,c#,outlook,icalendar,mailmessage,C#,Outlook,Icalendar,Mailmessage,我很难让我的图像显示为包含日历附件（iCal）的邮件的HTML正文的一部分 我试图做的是： 发送outlook可识别且包含HTML正文（也显示在outlook 2013中）的日历邀请。HTML应该内联显示页眉和页脚图像 我的代码在gmail中查看时可以正常工作，但它不会在Outlook中显示图像，而是在我希望实际显示图像的正文位置显示“header.jpg”和“footer.jpg” 我已经尝试了对这个代码库的很多修改-要么忽略日历邀请部分（然后图像工作），要么日历邀请部分工作，图像不显示，而是
var header=newlinkedresource（“header.jpg”，MediaTypeNames.Image.Jpeg）；
header.ContentId=Guid.NewGuid（）.ToString（）；
header.transferncode=transferncode.Base64；
header.ContentType=新的ContentType（“图像/jpg”）；
header.ContentType.Name=“header.jpg”；
header.ContentLink=新Uri（string.Format（“cid:{0}”，header.ContentId））；
var screen=newlinkedresource（“screen.jpg”，MediaTypeNames.Image.Jpeg）；
screen.ContentId=Guid.NewGuid（）.ToString（）；
screen.transferncode=transferncode.Base64；
screen.ContentType=新ContentType（“image/jpg”）；
screen.ContentType.Name=“screen.jpg”；
screen.ContentLink=新Uri（string.Format（“cid:{0}”，screen.ContentId））；
var sb=new System.Text.StringBuilder（）；
var dtStart=任命开始；
var dtEnd=任命结束；
var htmlcontent=string.Format（“”）+
"" +
"" +
"" +
“粗体可以正常工作，但页眉和页脚不起作用！/strong>”+
“
”+
"" +
""
);
var plaincontent=String.Format（“snip-snip”）；
var av1=AlternateView.CreateAlternateViewFromString（htmlcontent，新内容类型（“text/html”）；
av1.LinkedResources.Add（头）；
av1.LinkedResources.Add（屏幕）；
b.附录（“开始：VCALENDAR”）；
sb.AppendLine（“版本：2.0”）；
sb.附录（“方法：请求”）；
某人加了一句话（“开始：VEVENT”）；
某人追加电话（请求联系电子邮件）；
sb.附录（“类别：公共”）；
AppendLine（string.Format（“创建：{0:yyyyMMddTHHmmss}”，DateTime.Now））；
sb.附录行（“说明：”+普通内容）；
sb.AppendLine（“X-ALT-DESC；FMTTYPE=text/html:+htmlcontent”）；
AppendLine（string.Format（“DTSTART:{0:yyyymmddthhmmsz}”，DTSTART.ToUniversalTime（））；
AppendLine（string.Format（“DTEND:{0:yyyymmddthhmmsz}”，DTEND.ToUniversalTime（））；
AppendLine（string.Format（“DTSTAMP:{0:yyyymmddthhmmsz}”，DateTime.Now.ToUniversalTime（））；
sb.AppendLine（“组织者；CN=\”组织者\“：邮件收件人：+”TheOrganizer@foobar.com");
sb.追加行（“顺序：0”）；
sb.附录行（“UID:+请求.电子邮件通知UniqueID”）；
sb.AppendLine（“位置：“+request.LOCATION+”：“+request.LocationInformation”）；
sb.附录（“摘要；语言=美国：”+“删除”）；
某人附言（BEGIN:VALARM）；
sb.附加线（“触发器：-PT1440M”）；
某人追加命令（“动作：显示”）；
sb.附录（“说明：提醒”）；
某人附言（“结束：瓦勒姆”）；
某人附言（“结束：VEVENT”）；
sb.附录（“结束：VCALENDAR”）；
var icsView=AlternateView.CreateAlternateViewFromString（sb.ToString（），新内容类型（“文本/日历”）；
var message=new MailMessage（）；
message.AlternateViews.Add（body）；
message.AlternateViews.Add（icsView）；
返回消息；
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Content-Type: multipart/related; boundary=--boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac; type="text/html"
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Content-Type: text/html
Content-Transfer-Encoding: quoted-printable
<img src=3D"cid:443ba735-6376-45a1-a5af-6c679321baa2"/><div><strong>The bol=
d works fine, but the header and footer don't work!</strong></div><br /><di=
v><img src=3D"cid:145c43b0-da9e-40c4-b149-3a149fbc4503"/></div>
----boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac
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----boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac--
----boundary_0_8278962b-71cf-4ca1-9a64-5fb9629f2042
Content-Type: text/calendar
Content-Transfer-Encoding: base64
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DQpFTkQ6VkNBTEVOREFSDQo=
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交付给：snip@gmail.com
收到日期：10.182.167.74，SMTP id为zm10csp2847908obb；
2016年10月7日星期五15:42:14-0700（PDT）
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返回路径：
收到：来自msg12.snip.com（msg12.snip.com。[192.195.66.28]）
通过mx.google.com使用ESMTPS id q11si2985157ywc.340.2016.10.07.15.42.14
对于
（版本=TLS1_2密码=ECDHE-RSA-AES128-GCM-SHA256位=128/128）；
2016年10月7日星期五15:42:14-0700（PDT）
收到SPF:pass（google.com:domain of ofsnip@snip.com指定192.195.66.28为允许的发送方）客户端ip=192.195.66.28；
认证结果：mx.google.com；
spf=pass（google.com:domain of ofsnip@snip.com将192.195.66.28指定为允许的发件人）smtp.mailfrom=snip@snip.com
msg12.snip.com（Sentrion-MTA-4.3.1/Sentrion-MTA-4.2.2）从int11.snip.pvt（int11.snip.pvt[153.6.62.222]）收到，ESMTP id为u97MgC5a022486（版本=TLSv1.2密码=ECDHE-RSA-AES256-GCM-SHA384位=256验证=失败）；2016年10月7日星期五22:42:12 GMT
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收到：来自snip.com和Microsoft SMTPSVC（7.5.7601.17514）；
2016年10月7日星期五18:42:12-0400
MIME版本：1.0
发件人：剪
致：snip@gmail.co
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Content-Type: multipart/related; boundary=--boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac; type="text/html"
----boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac
Content-Type: text/html
Content-Transfer-Encoding: quoted-printable
<img src=3D"cid:443ba735-6376-45a1-a5af-6c679321baa2"/><div><strong>The bol=
d works fine, but the header and footer don't work!</strong></div><br /><di=
v><img src=3D"cid:145c43b0-da9e-40c4-b149-3a149fbc4503"/></div>
----boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-ID: <443ba735-6376-45a1-a5af-6c679321baa2>
----boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac
Content-Type: image/jpeg
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Content-ID: <145c43b0-da9e-40c4-b149-3a149fbc4503>
----boundary_1_306bb8e7-fb92-4eab-bf5c-b7393cf499ac--
----boundary_0_8278962b-71cf-4ca1-9a64-5fb9629f2042
Content-Type: text/calendar
Content-Transfer-Encoding: base64
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----boundary_0_8278962b-71cf-4ca1-9a64-5fb9629f2042--
private String senderAddress = "YOUR EMAIL ADDRESS";
private final String password = "YOUR EMAIL PASSWORD";
public static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd'T'HHmm'00'");
public static SimpleDateFormat dateParser = new SimpleDateFormat("dd-MM-yyyy HH:mm");
public static SimpleDateFormat dateFormater = new SimpleDateFormat("dd-MM-yyyy");
public String getSenderAddress() {
return senderAddress;
}
public String getPassword() {
return password;
}
public Session getMailSession() {
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
return Session.getInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(getSenderAddress(), getPassword());
}
});
}
public String newSend(Invitation invitation, String methodType) {
String UID = null;
// register the text/calendar mime type
MimetypesFileTypeMap mimetypes = (MimetypesFileTypeMap) MimetypesFileTypeMap.getDefaultFileTypeMap();
mimetypes.addMimeTypes("text/calendar ics ICS");
// register the handling of text/calendar mime type
MailcapCommandMap mailcap = (MailcapCommandMap) MailcapCommandMap.getDefaultCommandMap();
mailcap.addMailcap("text/calendar;; x-java-content-handler=com.sun.mail.handlers.text_plain");
MimeMessage message = new MimeMessage(getMailSession());
try {
message.setFrom(new InternetAddress(senderAddress));
message.setSubject(invitation.getSubject());
message.addRecipient(Message.RecipientType.TO, new InternetAddress(invitation.getTo()));
Multipart multipart = new MimeMultipart("mixed");
invitation.setDescription(getHtmlWithEncodedImages(multipart,invitation));
Multipart mpMixedAlternative = newChild(multipart, "alternative");
// html part
BodyPart messageBodyPart = buildHtmlTextPart(invitation);
mpMixedAlternative.addBodyPart(messageBodyPart);
// Add part two, the calendar
BodyPart calendarPart = buildCalendarPart(invitation, methodType);
calendarPart.setDisposition(BodyPart.INLINE);
mpMixedAlternative.addBodyPart(calendarPart);
addAttachment(multipart);
// Put the multipart in message
message.setContent(multipart);
// send the message
Transport transport = getMailSession().getTransport("smtp");
transport.connect();
transport.sendMessage(message, message.getAllRecipients());
transport.close();
UID = invitation.getTo() + "" + invitation.getStartdate().toString() + "" + invitation.getStarttime();
} catch (Exception e) {
//TODO logger log exception
}
return UID;
}
private void addAttachment(Multipart multipart) {
MimeBodyPart mbpAttachment = new MimeBodyPart();
File file=new File("C:/users/ishan.juneja/Desktop/temp.txt");
DataSource datasource=new FileDataSource(file);
try {
mbpAttachment.setDataHandler(new DataHandler(datasource));
mbpAttachment.setDisposition(BodyPart.ATTACHMENT);
mbpAttachment.setFileName("temp.txt");
multipart.addBodyPart(mbpAttachment);
} catch (MessagingException e) {
// TODO logger log exception
}
}
public String uploadImage(MultipartFile file){
byte[] bytes;
try {
String path = System.getProperty("catalina.home");
File dir = new File(path+"/tmpFiles");
if(!dir.isDirectory()){
dir.mkdir();
}
bytes = file.getBytes();
File serverfile = new File(dir.getAbsolutePath()+"/"+file.getName()+Math.random()+".png");
BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(serverfile));
stream.write(bytes);
stream.close();
System.out.println("file uploaded "+serverfile.getAbsolutePath());
String hostname="Unknown";
try {
hostname = InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException e1) {
e1.printStackTrace();
}
return "{\"location\" : \"http://"+hostname+":8080/emailinvitation/image/path/"+serverfile.getName()+"\"}";
} catch (IOException e) {
}
return "{\"location\":\"http://localhost:8080/emailinvitation/image/path/unknown.png\"}";
}
private Multipart newChild(Multipart parent, String alternative) {
MimeMultipart child = new MimeMultipart(alternative);
MimeBodyPart mbp = new MimeBodyPart();
try {
parent.addBodyPart(mbp);
mbp.setContent(child);
} catch (MessagingException e) {
// TODO logger log exception
}
return child;
}
private BodyPart buildCalendarPart(Invitation invitation, String methodType) throws Exception {
Date date1 = dateParser.parse(dateFormater.format(invitation.getStartdate()) + " " + invitation.getStarttime());
String startDate = timeZoneToUTC(invitation, date1);
Date date2 = dateParser.parse(dateFormater.format(invitation.getEnddate()) + " " + invitation.getEndtime());
String endDate = timeZoneToUTC(invitation, date2);
BodyPart calendarPart = new MimeBodyPart();
String calendarContent = "BEGIN:VCALENDAR\n" + "METHOD:" + methodType + "\n" + "PRODID: BCP - Meeting\n"
+ "VERSION:2.0\n" + "X-WR-TIMEZONE:" + invitation.getTimezone() + "\n" + "BEGIN:VEVENT\n" + "DTSTAMP:"
+ startDate + "Z\n" + "DTSTART:" + startDate + "Z\n" + "DTEND:" + endDate + "Z\n"
+ "SUMMARY:test request\n" + "UID:" + invitation.getTo() + "" + startDate + "\n"
+ "ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=FALSE:MAILTO:" + invitation.getTo() + "\n"
+ "ORGANIZER:MAILTO:" + senderAddress + "\n" + "LOCATION:Test\n" + "SEQUENCE:0\n"
+ "PRIORITY:5\n" + "CLASS:PUBLIC\n" + "STATUS:CONFIRMED\n" + "TRANSP:OPAQUE\n" + "BEGIN:VALARM\n"
+ "ACTION:DISPLAY\n" + "DESCRIPTION:REMINDER\n" + "TRIGGER;RELATED=START:-PT00H15M00S\n"
+ "END:VALARM\n" + "END:VEVENT\n" + "END:VCALENDAR";
calendarPart.addHeader("Content-Class", "urn:content-classes:calendarmessage");
calendarPart.setContent(calendarContent, "text/calendar;method=" + methodType);
return calendarPart;
}
private BodyPart buildHtmlTextPart(Invitation invitation) {
MimeBodyPart descriptionPart = new MimeBodyPart();
String content = invitation.getDescription();
try {
descriptionPart.setContent(content, "text/html; charset=utf-8");
} catch (MessagingException e) {
// TODO logger log exception
}
return descriptionPart;
}
private void addImages(Multipart parent,String filename) {
MimeBodyPart mbpAttachment = new MimeBodyPart();
try {
File file = new File("C:\\apache-tomcat-8.5.24\\tmpFiles\\"+filename);
FileDataSource ds = new FileDataSource(file);
mbpAttachment.setDataHandler(new DataHandler(ds));
mbpAttachment.setDisposition(BodyPart.INLINE);
mbpAttachment.setHeader("Content-ID", filename);
mbpAttachment.setFileName(filename);
parent.addBodyPart(mbpAttachment);
} catch (Exception e) {
//TODO logger log exception
}
}
private String timeZoneToUTC(Invitation invitation, Date date) {
ZoneId zone = ZoneId.of(invitation.getTimezone());
String date1 = dateParser.format(date);
DateTimeFormatter fmt = DateTimeFormatter.ofPattern("dd-MM-yyyy HH:mm").withZone(zone);
ZonedDateTime utc = ZonedDateTime.parse(date1, fmt).withZoneSameInstant(ZoneId.of("UTC"));
Timestamp sqlTs = Timestamp.valueOf(utc.toLocalDateTime());
return dateFormat.format(sqlTs);
}
public String getHtmlWithEncodedImages(Multipart parent,Invitation invitation) {
String temp = invitation.getDescription();
String html="<html><body>"+invitation.getDescription()+"</body></html>";
Document document = Jsoup.parse(html);
Elements allElements=document.body().getElementsByTag("img");
for (Element element : allElements) {
String elementstring=element.toString();
String tempfilename = elementstring.substring(elementstring.indexOf("file"));
String filename=tempfilename.substring(0,tempfilename.indexOf('"'));
temp=temp.replace(elementstring.substring(elementstring.indexOf('"'), elementstring.lastIndexOf('"')),"\"cid:"+filename);
addImages(parent, filename);
}
System.out.println("--++--"+temp);
return temp;
}