Explain about URL and HTTPS protocol
1. Resolve a relative URL 2. File size from URL 3. Use the HTTPS protocol For Applets, both IE and NN have implemented https in […]
Month: July 2021
Write/Read cookies using HTTP and Read a file from the internet
1. Write/Read cookies using HTTP 2. Read a file from the internet 3. Read a GIF or CLASS from an URL save it locally This […]
HTTP Authentification and CGI/Servlet
1. Identify yourself using HTTP Authentification A better alternative is the Authenticator class. NOTE: a simple explanation about the base64 encoding principle is shown in […]
Connect through a Proxy
1. The Networking Properties You have to set the following properties: NOTE: proxyHost, proxyPort are deprecated. you have to prefix them with “http.”.NOTE: Those properties are documented here: http://java.sun.com/javase/6/docs/technotes/guides/net/properties.htm. […]
Tips for dealing with HTTP-related problems
1. Check if a file was modified on the server 2. Check if a page exists The following is doing the same thing but this […]
Debug a HttpURLConnection problem
Take this example. The above snippet reads the HTML page and dumps it to the console. To trace what is going on at the HTTP […]
Request a Delivery / Read Receipt in Javamail
The read receipt (i.e. “Disposition-Notification-To” SMTP header) is a request for the receiving email client to send a DSN (delivery status notification) as soon as the […]
Receive email using POP3
POP3 supports simple download-and-delete requirements for access to remote mailboxes. Java Mail comes with Provider implementations for POP3 and IMAP, and the secure versions of those […]
Receive email using IMAP
IMAP presents mail messages as entries in a hierarchy of folders, one of which will be an inbox. Java Mail comes with Provider implementations for POP3 […]
Handle EML file with JavaMail
1. Loading an .EML file When saving an email to a file, the resulting file has an eml extension (email files–which are in RFC 822 […]
Read an Outlook MSG file
When Outlook Express saves an email, it uses the EML format which is a good thing because the format is a standard. But Outlook (not […]
Mix plain text and HTML content in a mail
Done! Happy Coding!
Send email with SMTPS (eg. Google GMail)
1. Send email with SMTPS It’s not uncommon that the outgoing mail needs to be encrypted using the SMTPS protocol. It’s the case for GMail […]
Debug a JavaMail Program
1. JavaMail Debug mode To set the JavaMail Debug mode “on” : or set the property when launching the JVM: This setting puts the JavaMail […]
Send email with authentication
NOTE: The JavaMail Authenticator is found in the javax.mail package and is different from the java.net class of the same name. The two don’t share […]
Send email with JavaMail
Simple email: HTML Email: Email with attachment: Done! Happy Coding!
Send an email with an attachment
In this example, Elvis is sending a GIF of his old Gumby friend. The attachment is encoded using the BASE64 algorithm. In this example, we […]
Receive email by java client
Done! Happy Coding!
Check if there is mail waiting
Exam code: Done! Happy Coding!
Send an email using the SMTP protocol
SMTP is the protocol used to send an email. Done! Happy Coding!
