Can use HttpUrlConnection class to connect once to server, then inside loop

Hello there!
I want to ask if can I use an HttpUrlConnection class to connect once to server and then inside a loop and with the same instance send many request to a web service?
What about "persistence connections"?
Regards,
Marcello

It already uses HTTP 1.1 persistent connections and a TCP connection pool behind the scenes. There is nothing to be gained from trying to re-implement that yourself and you won't succeed. HttpURLConnection can be used for exactly one request and one response. The underlying TCP connection is reused until you call disconnect(), but there's not much control you can exert over that.

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Hello,
I am wondering if someone can kindly help me solve the following problem? I have been trying to troubleshoot myself, but it seems that the problem persists.
Issue
I am having problems asscessing a wireless web login. The University that I attend allows students to access the wireless web by entering their login and password. When a new browser session is started, it automatically directs to the wiresless web log in. Initially, I had no problems and could easily access log into the site. Recently, I have had a issue where I try to log in and I get one of two error messages:
Safari can't open page "xxxxxx" because Safari can't estabish a secure connection to the server "xxxx"
Your login was processed successfully but a DNS Timeout occured. You will need to close and restart your browser in order to reach your orginal desitnation.
Notes:
Issue #1 happens the most often.
When issue #2 happens, I close my browser and open a new one but the page remains blank.
The wi-fi shows full strength and all others in the room have the ability to log on/off with no problems.
I have no problems with other secure sites when accessing from home wireless connection.
Troubleshooting
I have tried several things:
Date and Time - correct
Parental Controls - none are set
Keychain First Aid - no errors
Another User Account - I have tried using a different user account and the problem continues
Used another browser - I have tried using Firefix, same problem
Open DNS - I have added DNS servers 208.67.222.222 and 208.67.220.220 but the problem continues
Safari Clean Up - I have emptied cache, cleared history, reset safari, same problem
I have tried to research the issue and troubleshoot as best as I can but nothing seems to work. I am somewhat new to Mac's but am pretty savy but need a bit of guidence to figure this one out as I am not sure exactly what I need to do and don't want to mess up any settings any further and compound the issue. It is quite frustrating as I am unable to access the internet and class website during class.
I should mention that at one point I had a scan/clean app installed. Before this app was installed it seems to work, however, I can't directly link the timing. I can't remember exactly which program it was as I have since removed it.
Can someone help me identify the issue? Is it a Certificate Authority or DNS issue? I would love to get this solved...
Thank you!

mdkat, I have encountered this problem in the past, and doing the following helped:
In the URL, simply lop off the "s" at the end of https:// and load the resulting URL.
Before you quite understandably jump on me to say that this action will result in a non-secure connection, confirm for yourself that this will result in the web page being reloaded with the proper https:// protocol with the secure SSL/TLS layer as well as the feel-good lock icon.
That is not to say this behaviour is correct. Obviously the warning you see is an indication Safari / Firefox and the site you're accessing are not communicating in some way, but fixing it is up to them.
Use as you see fit, as I say it works for me.
I should mention that at one point I had a scan/clean app installed. Before this app was installed it seems to work, however, I can't directly link the timing. I can't remember exactly which program it was as I have since removed it.
Good idea. Probably not related though, since I have never installed such things.
... and thank you for writing such a thoughtful and well-organized question!

Safari 8.0.3 Can't establish a secure connection to the server

I have a Macbook Air (early 2014) running OS X Yosemite 10.10.2
Safari is version 8.0.3
When accessing the websites "https://www.national-lottery.co.uk" and "https://portal.wmpfonline.com" I am given the below message:
Safari can't open the page "https://www.national-lottery.co.uk" because Safari can't establish a secure connection to the server "www.national-lottery.co.uk".
Initially when I bought my Macbook Air these sites worked perfectly. Also, when I clear website data it will work for a short period of time (roughly 2 minutes) but other times that makes no difference. I have tried using FireFox but I still have an issue accessing these sites. When in recovery mode both sites work perfectly fine without an issue.
Is anyone able to help me with this issue? I have been searching and searching for a week to find a solution to this problem.
Thank you all in advance

This could be a complicated problem to solve, as there are several possible causes for it.
Back up all data, then take each of the following steps that you haven't already taken. Stop when the problem is resolved.
Step 1
From the menu bar, select
           ▹ System Preferences... ▹ Date & Time
Select the Time Zone tab in the preference pane that opens and check that the time zone matches your location. Then select the Date & Time tab. Check that the data and time shown (including the year) are correct, and correct them if not.
Check the box marked
          Set date and time automatically
if it's not already checked, and select one of the Apple time servers from the menu next to it.
Step 2
Triple-click anywhere in the line below on this page to select it:
/System/Library/Keychains/SystemCACertificates.keychain
Right-click or control-click the highlighted line and select
          Services ▹ Show Info
from the contextual menu.* An Info dialog should open. The dialog should show "You can only read" in the Sharing & Permissions section.
Repeat with this line:
/System/Library/Keychains/SystemRootCertificates.keychain
If instead of the Info dialog, you get a message that either file can't be found, reinstall OS X.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. Open a TextEdit window and paste into it by pressing command-V. Select the line you just pasted and continue as above.
Step 3
Launch the Keychain Access application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
In the upper left corner of the window, you should see a list headed Keychains. If not, click the button in the lower left corner that looks like a triangle inside a square.
In the Keychains list, there should be items named System and System Roots. If not, select
          File ▹ Add Keychain
from the menu bar and add the following items:
/Library/Keychains/System.keychain
/System/Library/Keychains/SystemRootCertificates.keychain
Open the View menu in the menu bar. If one of the items in the menu is
          Show Expired Certificates
select it. Otherwise it will show
          Hide Expired Certificates
which is what you want.
From the Category list in the lower left corner of the window, select Certificates. Look carefully at the list of certificates in the right side of the window. If any of them has a blue-and-white plus sign or a red "X" in the icon, double-click it. An inspection window will open. Click the disclosure triangle labeled Trust to disclose the trust settings for the certificate. From the menu labeled
          Secure Sockets Layer (SSL)
select
          no value specified
Close the inspection window. You'll be prompted for your administrator password to update the settings.
Now open the same inspection window again, and select
          When using this certificate: Use System Defaults
Save the change in the same way as before.
Revert all the certificates with non-default trust settings. Never again change any of those settings.
Step 4
Select My Certificates from the Category list. From the list of certificates shown, delete any that are marked with a red X as expired or invalid.
Export all remaining certificates, delete them from the keychain, and reimport. For instructions, select
          Help ▹ Keychain Access Help
from the menu bar and search for the term "export" in the help window. Export each certificate as an individual file; don't combine them into one big file.
Step 5
From the menu bar, select
          Keychain Access ▹ Preferences... ▹ Certificates
There are three menus in the window. Change the selection in the top two to Best attempt, and in the bottom one to CRL.
Step 6
Triple-click anywhere in the line of text below on this page to select it:
/var/db/crls
Copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
          Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.
A folder named "crls" should open. Move all the files in that folder to the Trash. You’ll be prompted for your administrator login password.
Restart the computer, empty the Trash, and test.
Step 7
Triple-click anywhere in the line below on this page to select it:
open -e /etc/hosts
Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the built-in Terminal application in the same way you launched Keychain Access.
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# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
127.0.0.1                              localhost
255.255.255.255          broadcasthost
::1                                        localhost
fe80::1%lo0                    localhost
If that's not what you see, post the contents of the window.

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I encounterd following error:
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SPECIALRUN
END RUNTIME
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amardeep.sidhu wrote:
That should work, just in case try adding DBLOGIN before USERID
DBLOGIN USERID x..No needed in the param file i think.its not needed at all you are right, but what else could it be? Besides any special unseen character :P

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It only seams to have a problem with https sites.
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Hi,
I using oracle HS to connect sql server but error ora-02068: following server from HSSQL and ORA-03135 connection lost contact.
step by step
1. Create the init.ora file = initHSSQL.ora
HS_FDS_CONNECT_INFO = HSSQL
HS_FDS_TRACE_LEVEL = OFF
2. modified listener.ora file
SID_LIST_LISTENERHSSQL =
(SID_LIST =
(SID_DESC=
(SID_NAME=HSSQL)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM=hsodbc)
LISTENERHSSQL =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = CEPITA1403.siam.local)(PORT = 1521))
and start listernerHSSQL = pass
3.modified tnsname.ora :
HSSQL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = CEPITA1403.siam.local)(PORT = 1521))
(CONNECT_DATA =
(SID = HSSQL)
(HS = OK)
and test by tnsping HSSQL = OK
4.setup ODBC SQL Server
Start --> Control Panel --> Administrative Tools --> Data Sources (ODBC)
Click on the ‘System DSN’ tab.
Click ‘Add’.
Name HSSQL
Click ‘Test Data Source…’.--> Pass
5
create public database link HSSQL
connect to sa
identified by xxxxxxxx
using 'HSSQL';
Database Link created.
6. select * from ACCOUNT_CODE@HSSQL;
show error message : ora-02068: following server from HSSQL and ORA-03135 connection lost contact.
Please let me know.
rose
Edited by: user7218901 on Mar 25, 2009 12:39 AM

Do you have all of your parameter files set up correctly?
You need to have a hsora file in the hs/admin directory for ioi for instance, initioiDB.ora. In this file you need to set up your hs init parameters. This is an example of what's in one of mine:
HS_FDS_CONNECT_INFO = Mapics
HS_DB_NAME = MAPICS
HS_DB_DOMAIN = WORLD
HS_FDS_TRACE_LEVEL = ON
The you need to have an entry in the tnsnames.ora file in the network/admin directory for hsodbcxtrad. The sid should be set to ioiDB.
You can find documentation on how to manage heterogenous services in the online documentation.
Managing Heterogenous Services Using Generic Connectivity
Hope this helps
Eric
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I managed to create the link as follows:
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CONNECT TO IOItest IDENTIFIED BY mba
USING 'hsodbcxtrad';
The link is created successfully.
I then try to run a query and get the following error :
select * from dealer@ioi
ERROR at line 1:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC]DRV_InitTdp: [Microsoft][ODBC SQL Server
Driver][SQL Server]Login failed for user '\'. (SQL State: 28000; SQL Code:
18456)
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Can't establish a secure connection to the server

Safari loads ok and I can browse the internet. However, when i try to log on to 'my ebay'(and some other sites) I get the following error message:
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In the mean time I have downloaded Firefox and that is working really well.
Can anyone help repair my Safari?

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Can use HttpUrlConnection class to connect once to server, then inside loop

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