Switching between https secure zone to http domain
Hi,
I'd like to know what the best way to link back to a non secure zone http domain from a secure https (worldsecuresystems.com) domain. I've seen a few articles on this subject and tried a few different approaches, but nothing that I've read/tried seems to work completely. I've tried using the full path by adding {module_defaulturl} to links e.g. <a href="{module_defaulturl}/contact.html">Contact</a> and I've tried adding a content holder e.g.<a href='/{module_contentholder name="_Template - Default Domain Host"}/about.html'>About</a>, where the host/path is added to the content holder. I've also tried using the full path hardcoded. All three approaches work for navigating between/from https to http domains, so far so good.
However, whereas this full path approach works to enable linking within the website, the links no longer work within the Visual Editor (ICE). It appears the ICE will not work with full path links. Does anyone know of a way around this, or know of a better approach to setting up links between https and http domains? I'm thinking of using javascript to add the full path to links when the page loads whilst on a secure domain so that the script doesn't run in the ICE. But is there a better/simpler way?
Regards, Mark.
Thanks for the suggestion although getting to the solution requires a subscription to their service. But your suggestion helps because they mention achieving what I want with jquery, so I assume that's the accepted way to go about it. I've already implemented a solution with jquery, I was just trying to see if there was another 'more native' BC way. Cheers
Similar Messages
-
JSF / Switch between HTTP and HTTPS
Hello!
I want to switch between HTTP and HTTPS using JSF.
Under Apache Struts framework I can use struts extension "sslext.jar" to configure switching between http and https in one web application.
e.g. Login-jsp should be secured, all other jsp's should run unsecured.
Any ideas?
regards
Harald.Thanks,
I made the necessary enhancement for the second phase, password confirmation required when return to SSL zone after leaving it after a succesful login.
I did the following:
1) create a class in the application scope and/or singleton class with the servlet paths that require SSL
2) create a plugin that reads ActionConfigs from the ModuleConfig
3) create a filter that sets a request scope flag that says that password must re-entered.
Code Extracts:
1) MainshopContainer application level parameter singleton class:
private static HashMap sslZoneMap = new HashMap(50); // key = servlet path of request, example /login.do
public boolean isInSSLZone(String servletPath)
return this.sslZoneMap.containsKey(servletPath);
public void addToSSLZone(String servletPath)
this.sslZoneMap.put(servletPath,null);
public int getNumberOfActionsInSSLZone()
return this.sslZoneMap.size();
2) Struts plugin
add a call to loadSSLZoneMap in plugin init method:
loadSSLZoneMap(config, mainshopContainer);
private void loadSSLZoneMap(ModuleConfig config, MainshopContainer mainshopContainer)
throws ServletException
try {
ActionConfig[] actionConfigs = config.findActionConfigs();
for (int i = 0; i < actionConfigs.length; i++)
if (actionConfigs.getParameter().indexOf("/jsp/account/") < 0) // /account/* = URL path for SSL zone
// not found = not ssl zone
System.out.println("loadSSLZoneMap, following actionConfigs excluded from SSL Zone: "+actionConfigs[i].getPath());
else
// found = ssl zone
String servletPath = actionConfigs[i].getPath()+".do";
mainshopContainer.addToSSLZone(servletPath);
System.out.println("loadSSLZoneMap, following servletPath added to SSL Zone: "+servletPath);
System.out.println("loadSSLZoneMap, number of actions in SSL Zone: "+mainshopContainer.getNumberOfActionsInSSLZone());
catch (Exception ex)
ex.printStackTrace();
throw new ServletException("Exception caught in loadSSLZoneMap: "+ex.toString()+" Initialization aborted.",ex);
3)
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse res = (HttpServletResponse) response;
String servletPath = req.getServletPath();
boolean secure= this.mainshopContainer.isInSSLZone(servletPath);
The wole picture:
The filter adds a RequestDTO object that includes all request parameters, one of them is the secure flag.
I have a session scope class UserContainer that includes all the session parameters, one of them is the lastRequestDTO.(last made request)
At the end of all my jsp's I set the lastRequestDTO variable.
In that method I set the passwordConfirmationRequired flag if needed:
public void setLastRequestDTO(RequestDTO _lastRequestDTO)
if (this.lastRequestDTO != null && this.lastRequestDTO.isSecure() != _lastRequestDTO.isSecure())
this.setPasswordConfirmationRequired(true);
this.lastRequestDTO = _lastRequestDTO;
I read the passwordConfirmationRequired in all my jsp's in the SSL zone that allow editing or deleting and if that flag is true, a valid password must be re-entered in order to make the updates.
When the password is OK I reset the passwordConfirmationRequired to false.
I need some help for the first phase, that is SSL setup for all actions related to jsp's with url path /account/*
I tought I could define it in the web.xml:
<security-constraint>
<web-resource-collection>
<web-resource-name>All Account Related Pages</web-resource-name>
<url-pattern>/account/*</url-pattern>
</web-resource-collection>
<user-data-constraint>
<transport-guarantee>CONFIDENTIAL</transport-guarantee>
</user-data-constraint>
</security-constraint>
but that doesn't work and finnaly understood why:
Example: /WEB-INF/jsp/account/login.jsp corresponds to /login.do
The url pattern /account/* at the container level is never encountered.
Is it allowed to declare the following action path: /account/login instead of /login?
If yes I could add following prefix /account to all my action paths and forward paths and this could resolve my problem.
What's your opinion?
If no, would your library resolve this?
Will all the Struts/JSP/JSTL url generating tags pick-up the required protocol (http/https) according to your configuration file?
Regards
Fred -
Switching between https and http requests
Hi,
Our application is built using ADF 10.1.3
This application need to be integrated with an in house built single sign on system. ( SSO system is built in C# and .NET)
This single sign on system only understand https request. Once user is validated against single sign on system, our application's authorization page is called in HTTPS mode. Once the user is authorized, he is forwarded to home page. While forwarding to home page, we want to convert the HTTPS request to HTTP.
Currently once the user is authenticated, all requests are happening in HTTPS mode.
We do not know how to make http request from existing https requested page.
Any help is appreciated.
Thanks
RanajitHi,
the way to do this is by redirecting the call from a PhaseListener or command button. The solution Avrom refers to is a PhaseListener that uses XML configuration file to determine whether or not the page you are navigating to requires https or http. The code that handles the protocol switch is printed below
* Determines if the requested page requires SSL and if the current protocol
* meets this need. If not the protocol is switched between http and https
* @param viewId
* @param pageRequiresSSL
public void handleProtocolSwitch(String viewId, boolean pageRequiresSSL)
ExternalContext exctx = FacesContext.getCurrentInstance().getExternalContext();
boolean isSecureSSLChannel = ((HttpServletRequest)exctx.getRequest()).isSecure();
// pages that require SSL and SSL is on, or pages that don't require
// SSL but SSL is on and should be kept
if (pageRequiresSSL && isSecureSSLChannel || !pageRequiresSSL && isSecureSSLChannel && isKeepSSLMode) {
printDebugMessage("Page requires SSL = "+pageRequiresSSL+", channel is secure = "+isSecureSSLChannel+", is keep SSL = "+isKeepSSLMode);
printDebugMessage("No protocol change required");
// page requires SSL and SSL is not active. Switch to SSL.
if (pageRequiresSSL && !isSecureSSLChannel) {
printDebugMessage("Page requires SSL = "+pageRequiresSSL+", channel is secure = "+isSecureSSLChannel);
printDebugMessage("Protocol change required to use https");
switchToHttps(viewId);
// switch to HTTP is page doesn't require SSL and channel isn't secure
// and isKeepSSLMode is false
if (!pageRequiresSSL && !isKeepSSLMode && isSecureSSLChannel) {
printDebugMessage("Page requires SSL = "+pageRequiresSSL+", channel is secure = "+isSecureSSLChannel+", is keep SSL = "+isKeepSSLMode);
printDebugMessage("Protocol change required to use http");
switchToHttp(viewId);
if (!pageRequiresSSL && !isSecureSSLChannel) {
printDebugMessage("Page requires SSL = "+pageRequiresSSL+", channel is secure = "+isSecureSSLChannel);
printDebugMessage("No protocol change required");
* Switches from https to http using a redirect call
* @param viewId
private void switchToHttp(String viewId) {
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext exctx = facesContext.getExternalContext();
ViewHandler vh = facesContext.getApplication().getViewHandler();
String pageURI = vh.getActionURL(FacesContext.getCurrentInstance(), viewId);
//redirect to http URL
String remoteHost = getHostNameFromRequest();
printDebugMessage("Switch to http on host "+ remoteHost);
try {
String port = httpPort.equalsIgnoreCase("80") ? "" : ":" + httpPort;
String url = "http://" + remoteHost + port + pageURI;
printDebugMessage("Redirecting to http URL "+ url);
//TODO check request Map
this.printDebugMessage(" Content size of RequestMap before redirect "+exctx.getRequestMap().size());
exctx.redirect(url);
} catch (IOException e) {
printDebugMessage("Redirect to http port failed "+ e.getMessage());
* switches to https using a redirect call
* @param viewId
private void switchToHttps(String viewId) {
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext exctx = facesContext.getExternalContext();
ViewHandler vh = facesContext.getApplication().getViewHandler();
String pageURI = vh.getActionURL(FacesContext.getCurrentInstance(), viewId);
//redirect to https URL
String remoteHost = getHostNameFromRequest();
printDebugMessage("Switch to SLL/https on host "+ remoteHost);
try {
String port = httpsPort.equalsIgnoreCase("443") ? "" : ":" + httpsPort;
String url = "https://" + remoteHost + port + pageURI;
printDebugMessage("Redirecting to https URL "+ url);
//TODO check request Map
this.printDebugMessage(" Content of RequestMap before redirect "+exctx.getRequestMap().size());
exctx.redirect(url);
} catch (Exception e) {
printDebugMessage("Redirect to http port failed "+ e.getMessage());
* @return the hostname of the page request
private String getHostNameFromRequest() {
ExternalContext exctx = FacesContext.getCurrentInstance().getExternalContext();
String requestUrlString = ((HttpServletRequest)exctx.getRequest()).getRequestURL().toString();
URL requestUrl = null;
try {
requestUrl = new URL(requestUrlString);
} catch (MalformedURLException e) {
e.printStackTrace();
String remoteHost = requestUrl.getHost();
return remoteHost;
}If your container doesn't support session sharing between http and https then the session is renewed. In OC4J you will have to configure this.
Frank -
How do I switch between http and https?
I need to be able to show a majority of a portal in http, but need to have a couple of pages/portlets use https. Does anyone know how I can setup certain items to use https and also have it automatically switch back to http for those items that don't need to be encrypted?
Any information would be great!Here's what I've got in my web.xml. Note that all I'm trying to do here is replicate the functionality that was provided in WLPortal 4.0 with the HTTPS_URL_PATTERNS parameter in the old web.xml.
web.xml section
<security-constraint>
<display-name>SSLResources</display-name>
<web-resource-collection>
<web-resource-name>SSLResources</web-resource-name>
<description>Resources requiring SSL</description>
<url-pattern>/appmanager/ctdportal/retail</url-pattern>
<url-pattern>/appmanager/ctdportal/admin</url-pattern>
<url-pattern>/appmanager/ctdportal/cos</url-pattern>
<!--<url-pattern>/security/*</url-pattern>-->
</web-resource-collection>
<user-data-constraint>
<transport-guarantee>CONFIDENTIAL</transport-guarantee>
</user-data-constraint>
</security-constraint>
--------------------------------------- -
Safari switches between http and https infinitely; refuses to load the page and quits
Such problems have not occured with Snow Leopard while opening the same webpage.
Also apple mail quits everytime I get mail from Junk Mailbox manager at my University.
Startup screen freezes approx (1 in 5 times while restarting); dont know what causes it.
Has anyone had similar cascade of problems?? I havent installed any programs after upgrading to Lion!!!!Greetings,
In the reference you cited below:
http://download.oracle.com/docs/cd/B31017_01/web.1013/b28957/configssl.htm#CHDHGCDJsee the "Optional Steps in secure-web-site.xml" where a description of how to setup a mixed secure (https) and regular http pages site is described.
-Michael -
Difference between my-secure-amf and my-secure-http
Whats the difference between my-secure-amf and my-secure-http?
For historical reasons, an "AMF" channel is binary encoded AMF byte stream over HTTP. an "HTTP" channel (bad name!) is an AMFX encoded XML stream over HTTP.
For more on the different types of channels see the documentation here: http://help.adobe.com/en_US/LiveCycleDataServicesES/3.1/Developing/WSc3ff6d0ea77859461172e 0811f00f6e876-7fecUpdate.html
Tom -
No switch to HTTPS occurred, so it is not secure to send a password
Hi,
I have created one SAP Transaction iview with Tcode HRESSIN_F16 which is accessed through ESS service in portal. This iview uses system with logon ticket say ESS. When we access this iview in our local LAN using HTTP URL it works fine.
But when we access it through HTTPS (https://www.mycompany.com) we get a logon popup saying No switch to HTTPS occurred, so it is not secure to send a password even though we have implemented SSO with logon tickets.
What are the possible causes?
Regards,
Bharat Mistry.Hi Joerg,
Thanks for your quick reply.I will do as you suggest and then let you know whatever result
Ok I am explaning you in detail.
I have created one SAP Transaction iview with Tcode HRESSIN_F16 which is accessed through ESS service in portal. This iview uses system with logon ticket say ESS. When we access this iview in our local LAN using HTTP URL it works fine.We have Web dispatcher also.
In our case their is situation of (SSL termination without metadata exchange).Means upto Web dispatcher HTTPS then from it to WEB AS HTTP.
When we access it through HTTPS , we get a logon popup saying No switch to HTTPS occurred, so it is not secure to send a password even though we have implemented SSO with logon tickets.
But even after this warning if We provide username and password set on ECC6,it gives error either user name or password is incorrect.
And I am sure that username and password are same as ECC6.
There is also no problem of authorization,we had also tried with SAP_ALL.
Here it is web dispatcher profile parameter
SAPSYSTEM = 8
wdisp/shm_attach_mode = 6
rdisp/mshost = ....
ms/http_port = 8101
DIR_INSTANCE = /secudir
ssl/ssl_lib=/secudir/libsapcrypto.so
ssl/server_pse=/secudir/sec/.....pse
wdisp/auto_refresh = 120
wdisp/max_servers = 100
wdisp/server_info_location = /msgserver/text/logon
icm/server_port_0 = PROT=HTTPS,PORT=443
icm/server_port_1 = PROT=HTTP,PORT=0
icm/HTTP/admin_0 = PREFIX=/sap/wdisp/admin,DOCROOT=/webdisp/admin
wdisp/HTTPS/dest_logon_group = APPS
wdisp/ssl_encrypt = 0
wdisp/add_client_protocol_header = true
icm/HTTPS/verify_client = 0
icm/HTTP/redirect_0 = PREFIX=/, TO=/irj/index.html
#icm/HTTP/redirect_0 = PREFIX=/, TO=/APPS~irj
is/HTTP/show_detailed_errors = false
icm/HTTP/error_templ_path = /webdisp/error
icm/HTTP/file_access_0 = PREFIX=/images/,DOCROOT=/webdisp/images
Thanks & Regards,
Sunny
Edited by: Sunny Patel on Jan 21, 2008 2:07 PM -
Maintaining Sessions between http and https
I have a web application in which I want my users to view the login page over SSL and send the login request via SSL also, but then I want to revert back to http://
My problem is, and i've seen this problem on loads of boards with no real resolution, during the login I set some objects with in the session that are used to display information in other parts of the site... but the session object is being lost!!!
I am using Tomcat as my web server, I saw an article on JavaWorld titled "mix protocols transparently in web applications", and apparently to over come this problem if you are using WebLogic 6.1 there is a parameter in the weblogic.xml file that must be configured, but I cant find a similar one on Tomcat!!!
Thanks in advanceThanks a million for the answer, I have got it working now, but I had to do something a little different for any one else who experiances this problem I'll go through it... I set an attribute in the context which was named the the value of the current session id and contianed the session object. Then when leaving the login handeling in my dispatcher servlet I apended the session id to the url of the next jsp called. In this jsp then I retrived the "secure session" object from the context, this so far is what you suggested.
But then I had to loop through "non secure session" object's attributes and set them in the "non secure session" object, that is I was not just able to reset the "non secure session" object equal to the "secure session" object as when I went on to the next page it was reset to the "non secure session" object again!
The fact that the session object is changed when moving between http and https is (according to Tomcat buglist) a bug of Tomcat 4.1 and did not occur in tomcat 3.2 -
No switch to HTTPS occurred in Web Dynpro ABAP application
We are building a Web Dynpro ABAP application and when I logon I get:
No switch to HTTPS occurred, so it is not secure to send a password
I want to suppress this message but I can only find a parameter that works for BSP applications (You can suppress the message using the property BspDontShowHttpsWarning. Goto SICF and locate your service, open node and choose tab error pages. At redirect URL add '&bspdontshowhttpswarning=X').
However, for Web dynpro this parameter does not work. Does somebody know if there is a parameter available for web dynpro ABAP applications to suppress this message?
kind regards
Angelique HeutinckAngeline
I asume that you are using a "Basic Authentication" method, if this is your case, you should configure the SICF service with the following parametters:
1) Go to SICF, /yourservice / double click
2) On the "Logon Data" tab, in the "Procedure" option choose "Alternative Logon Procedure".
3) On the same tab, at the "Logon procedure option", delete the SSO option, and change the Number of the another methods, raised the "Basic Authentication" to the first place.
4) Go to Error pages tab, flag "System logon", and after that click over Configuration, here check "Do no display warnings"
Hope this help you ! -
Problem when switching from https to http on Safari
I am using a Safari browser and try to switch from https to http within the same web application.
The Safari browser is configured so that on Safari->Preferences->Security the check box "Ask before sending a non-secure form to a secure website" is checked.
When using the Safari browser in my web application and going from an https page to an http page, the browser shows an (expected) dialog box asking the user whether he wants to send a non secure form. Clicking Ok (twice) causes the following problematic dialog box to appear :
Safari can't open the specified address;
Safari can't open "(null)" because Mac OS X doesn't
recognise Internet addresses starting with "(null)"
How can I avoid this problem without having to uncheck the above mentioned check box in Safari->Preferences->security.I have somehow a similar problem,too. My site is in https upon login which maintains some session data. One of the features of my site is the file upload (servlet) which does some batch processing. Since my https session terminates(timeout)upon uploading, I resorted to switching the link to an http session using
File Upload
When I do "session.getAttribute('data')" in my servlet after being called by the "upload.jsp", a NullPointerException is thrown at that particular line.
My question:
1. Upon uploading of file/data via https, is there a maximum bytes that it can only process? My file is just less than 1MB and it terminates the session. How do I go about it? Should I switch it then to an http?
2. If I switch from https to an http session, SSL session data can not be retrieved from an http session?
Thanks! -
Hello,
I am trying to submit a paragraph of code which has been working on other computers. On my system, I receive the error:
E_COSMOS_GENERIC: Could not get stream info for http://cosmos08.osdinfra.net:88/cosmos/bingads.business.fastjobs/shares/adCenter.BICore.SubjectArea/SubjectArea/resources/PROD/MonetizationFacts.view
[HttpStatusCode = Forbidden; ErrorCode = 0x80004005(The operation failed); Description = HTTP(http://cosmos08.osdinfra.net:88/cosmos/bingads.business.fastjobs/shares/adCenter.BICore.SubjectArea/SubjectArea/resources/PROD/MonetizationFacts.view?view=xml&property=info)
is not allowed. Please switch to HTTPS instead. For more detailed instruction, please check (https://microsoft.sharepoint.com/teams/Cosmos/Documents/SecurityAndCompliance/Security%20Updates%20to%20VcClient.docx).
Essentially it seems that Visual Studio is telling me that this location is not within communication, because I have to switch to HTTPS. However, because I don't explicitly reference this location in my code, I deduce that it is embedded somewhere in my
system. Does anybody know how to make the switch from HTTP to HTTPS within the Visual Studio system?
Thanks,
RohitHi Rohit,
From your description, could you please tell me how you submit a paragraph of code which has been working on other computers and then get the error message?
If possible, I suggest you can provide me the detail steps or screen shot about how to submit a paragraph of code which has been working on other computers.
What application you are developing?
To further help you support this issue, please tell me more information about your issue.
Thanks for your understanding.
Best Regards,
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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HERE to participate the survey. -
Switching from HTTP to HTTPS - adverse side effects???
Hi everybody,
what are the possible adverse side effects when changing from HTTP to HTTPS?
I could imagine that previously saved web bookmarks would not work, correct?
Links saved in roles will have to be adjusted in roles, correct?
Anything else?
Does anybody have knowledge/experience in this area and how do you recommend to proceed when switching a productive system from HTTP to HTTPS?
MartinThe web bookmarks stored on IE browser will still point to the HTTP service, not HTTPS, you will have to make the changes manually.
The URLS for BW Reports are generated dynamically, you should be able to maintain an entry in table HTTPURLLOC and get this switched to HTTPS. see OSS note 805344 for the same.
Thanks. -
URL redirect - how to switch from https to http
Hi, all.
We have some requirement that the portal session be switched to https on some iviews while the rest of the contents are in http. I am thinking of using url redirect on the web dispatcher.
What I found is that the url redirect from http to https works great. Now if I want to switch back to http, the redirect doesn't work. Note that the http port is 80 and https port is 443 on the web dispatcher. To test, here is the parameter I did to switch from http to https. This works and transforms the url from http://ozonehomeep3.xxxxxxxxx/irj/portal/zsap_xxxxx to https://ozonehomeep3.xxxxxxxxx/irj/portal/zsap_xxxxxxxxxxxx
icm/HTTP/redirect_0 = PREFIX=/, FROM=/irj/portal/zsap_, FOR=ozonehomeep3, FROMPROT=http, PROT=https, HOST=ozonehomeep3.XXXXXX
If I flip it back the other way:
icm/HTTP/redirect_0 = PREFIX=/, FROM=/irj/portal/zsap_, FOR=ozonehomeep3, FROMPROT=https, PROT=http, HOST=ozonehomeep3.XXXXXX
When I connect using the url https://ozonehomeep3.xxxxxxxxx/irj/portal/zsap_xxxxxxxxxxxx, it ignores the parameter and the redirect to http did not happen.
What is wrong?
Thanks,
Jonathan.Hello,
I've had a similar problem for one of my customers.
I've tried to do it on a root level, just Https://FQDN:port_https/ to http://FQDN:Port_http/
I've used this parameter to solve it:
icm/HTTP/redirect_0 = PREFIX=/, FOR=FQDN, FROMPROT=HTTPS, HOST=FQDN, PORT=80, PROT=http
maby you should try:
icm/HTTP/redirect_0 = PREFIX=/, FROM=/irj/portal/zsap_, FOR=FQDN, FROMPROT=HTTPS, HOST=FQDN, PORT=80, PROT=http, TO=/irj/portal/zsap_
You should also verify that the standard http port (80) are open in the firewall from the outside, just take a telnet session to FQDN and port 80
to quickly determined if the firewall policy are right.
Good luck!
Kind Regards
Håvard Fjukstad. -
Hi all.
I followed Scott Spadafore's advice on forcing a specific page to HTTPS:
Re: HTTPS and LOGIN
I'm getting redirected to the right protocol, but the wrong port. The problem seems to be here:
htp.p('Location: http://'||
owa_util.get_cgi_env('HTTP_HOST')||
owa_util.get_cgi_env('SCRIPT_NAME') ||
owa_util.get_cgi_env('PATH_INFO')||'?'||
owa_util.get_cgi_env('QUERY_STRING'));
HTTP_HOST returns "host.mcg.edu:7779" in non-SSL mode, and "host.mcg.edu:4443" in SSL mode. HTTP_HOST contains the port of the protocol I'm switching from, so for example when switching to HTTP, I get:
http://host.mcg.edu:4443/pls/htmldb... <-- SSL port
If I use the SERVER_NAME CGI variable (host.mcg.edu) and then hardcode the http or https port number, it works. Not very portable, though, as our production environment uses default ports (80 and 443).
What am I doing wrong?
Thanks for your insight.
-JohnJohn,
you could also use mod_rewrite to configure this stuff directly in your Apache (Oracle Http Server powered by Apache :).
http://blog.murf.org/?p=24
This way you would have the configuration in a single place.
~Dietmar. -
Diff between HTTP and FTP protocols
Hi
could u plz tell the diff between Http & FTP protocols
With Regards
venkat.Google for "HTTP vs FTP".
You will get plenty of articalls
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