Entries Tagged 'Administration' ↓
May 25th, 2011 — Administration, Clojure, code, java, jvm
I recently had the need to access gmail using Clojure. I used JavaMail to accomplish this via pop3. Below is some code that I wrote to help me get emails. Hope you find it useful Enjoy 
(use '[clojure.contrib.duck-streams])
(def props (System/getProperties))
; Get the default Session object.
(def session (javax.mail.Session/getDefaultInstance props))
; Get a Store object that implements the specified protocol.
(def store (.getStore session "pop3s"))
;Connect to the current host using the specified username and password.
(.connect store "pop.gmail.com" "username@gmail.com" "password")
;Create a Folder object corresponding to the given name.
(def folder (. store getFolder "inbox"))
; Open the Folder.
(.open folder (javax.mail.Folder/READ_ONLY ))
; Get the messages from the server
(def messages (.getMessages folder))
(defn getFrom [message](javax.mail.internet.InternetAddress/toString (.getFrom message)))
(defn getReplyTo [message] (javax.mail.internet.InternetAddress/toString (.getReplyTo message)) )
(defn getSubject [message] (.getSubject message))
;print out the body of the message
(for [m messages] (read-lines(.getInputStream m)) )
;;;;;code for sending an email
(def props (System/getProperties))
(. props put "mail.smtp.host", "smtp.gmail.com")
(. props put "mail.smtp.port", "465")
(. props put "mail.smtp.auth", "true")
(. props put "mail.transport.protocol", "smtps")
(def session (javax.mail.Session/getDefaultInstance props nil))
(def msg (javax.mail.internet.MimeMessage. session))
(. msg setFrom (javax.mail.internet.InternetAddress. "sender@gmail.com"))
(. msg addRecipients javax.mail.Message$RecipientType/TO
"receiver@gmail.com")
(. msg setSubject "i am the subject")
(. msg setText "I am the body!!!")
(. msg setHeader "X-Mailer", "msgsend")
(. msg setSentDate (java.util.Date.))
; send the email
(def transport (. session getTransport))
(. transport connect "smtp.gmail.com" 465 "sender@gmail.com" "password")
(. transport sendMessage msg (. msg getRecipients javax.mail.Message$RecipientType/TO))
(. transport close)
November 1st, 2010 — Administration, apache, code, Groovy, Uncategorized
Hey there fellow Groovyists! I was recently in need of performing Basic Authentication on Apache using Groovy for a proof of concept. Below is what I was able to quickly put together.
//Here is a quick groovy 1.7.4 Basic Auth Example
@Grab(group=’org.codehaus.groovy.modules.http-builder’, module=’http-builder’, version=’0.5.0′ )
def authSite = new groovyx.net.http.HTTPBuilder( ‘http://10.110.201.115/~juanvazquez/basicAuth/’ )
authSite.auth.basic ‘user’, ‘pwd’
println authSite.get( path:’testAuth.html’ )
August 16th, 2008 — Administration, apache, Linux
I recently configured Apache2 to be a ReverseProxy/Proxy and thought I would share my experiences while it was still fresh. Having never configured any kind of proxy, I found this webpage very informative. The scenario I would like to use for my example is that I have three internal web servers called
| Site |
Local IP |
Remote IP |
Port |
| www.reallycoolsite.com |
192.168.1.102 |
10.15.22.1 |
80 |
| www.justcoolsite.com |
192.168.1.102 |
10.15.22.2 |
80 |
| www.reallylamesite.com |
192.168.1.44 |
10.15.22.3 |
80 |
Alright…pretty straight forward right? If you are in a situation that I was when I started, you haven’t done much more than install apache from source and added a few modules here and there occasionally. The way I solved the problem was to create name-based virtual host for each of the servers.
our example would look like
#you can listen on specific ports for requests if you like
#(ex->Listen 192.168.1.102:80)
#I use the below statement to listen on 80 for all requests
Listen *:80
#Because we have multiple names mapped to same ip
NameVirtualHost 192.168.1.102:80
<VirtualHost 192.168.1.102:80 >
ServerName www.reallycoolsite.com
ProxyRequests Off
ProxyPass / http://10.15.22.1/
ProxyReverse / http://www.reallycoolsite.com/
ProxyPreserveHost On
ErrorLog reallycoolsite_error_log
CustomLog reallycoolsite_access_logs
</VirtualHost >
<VirtualHost 192.168.1.102:80 >
ServerName www.justcoolsite.com
ProxyRequests Off
ProxyPass / http://10.15.22.2/
ProxyReverse / http://www.justcoolsite.com/
ProxyPreserveHost On
ErrorLog justcoolsite_error_log
CustomLog justcoolsite_access_logs
</VirtualHost >
<VirtualHost 192.168.1.44:80 >
ServerName www.reallylamesite.com
ProxyRequests Off
ProxyPass / http://10.15.22.3/
ProxyReverse / http://www.reallylamesite.com/
ProxyPreserveHost On
ErrorLog reallylamesite_error_log
CustomLog reallylamesite_access_logs
</VirtualHost >
If you receive errors during the communication of your proxy and your server, it may be a good idea to investigate if you have an http protocol error discussed at the bottom of this page
The following two lines are pulled from the reference and fixed a problem I had with one of my IIS servers using SSL(for more info about the issue, go here
SetEnv force-proxy-request-1.0 1
SetEnv proxy-nokeepalive 1
My apache configuration file(httpd.conf) was the file I used to edit my settings.. Your file may be different depending on how new your apache version is. I found that some implementations called the configuration file apache.conf…. I hope this blog entry is helpful you, Happy Configuring!
June 24th, 2008 — Administration, Linux
Inquiring minds want to know, what is this su - and why is it different than su? Well, if you are like me, you didn’t even know that su - existed. I ran into this problem when I was trying to add a new user to a new Linux machine. Remote root login was disabled(for obvious reasons:D) and I was logged in with my regular non-privileged user account. Well, normally the story goes like this…
- su
- Authenticate
- useradd account
- set password
- log out of privileged account
- Take coffee break from all the hard work and call it a day
No so today:( . When I attempted to run step three(useradd), I received a command not found error. “That’s weird” I thought. How could a machine not have this basic command. I looked in the bin directory to see if it was some kind of path error I was having. Thinking that this was the case, I was shocked to see that none of the user commands(adduser, usermod, deluser) where there.
After a few minutes of scratching my head, I asked someone more versed in Linux than I what they thought. After walking through each of the steps I had taken, my mistake was easily spotted. I hadn’t added the ‘-’ to the su command. Thinking that the explanation was weird, I checked with google for the su - command. Sure enough, the link to Wikipedia had this to say about it,
Optionally, you can use a hyphen with su to invoke a login shell and assume the target user’s complete user environment:
I am glad I had someone to point this out to me… It could have been a longer and very frustrating ordeal. It was also a lesson for me to refer more to the man pages(it had the answer there too). I hope this blog entry helps someone else who is confronted with this situation.