I want to set a proxy for an outgoing web request triggered via slash command. The web request I'm sending is never hitting my target server and I think it's because it's not routing through our proxy.
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My VB.Net Windows form desktop application needs to complete an OAuth2 authorization to access online data from Intuit (QuickBooks Online). I am able to successfully (1) obtain the URL of the authorization web page, (2) redirect the user to that page, (3) receive the authorization code in the HTTP request from the URL redirect using HPPTListener when the URL is "localhost" and finally (4) retrieve the access token.
However, to use this app in production, the redirect URL cannot be "localhost" and must be https, not http. When I set the HTTPListener to monitor an https URL (e.g. https://www.stinsonsolutions.com, my web site), it does not receive any HTTP request like it does when set to monitor "localhost".
I saw one post suggesting opening a certain port in my Firewall, But since this app will be deployed to other users, that solution would not work. Is it not possible to listen to an https URL outside my app with HTTPListener, or am I missing a step? If it is not possible with HTTPListener, what can I use in my desktop application to receive the HTTP request sent to a https redirect URL?
Thanks.
I have configured JBoss with HTTPS connector only. Now I have problem, that in case I'm using HTTP request to HTTPS connector, it returns page with one ASCII character, instead of some error page, for example 505 or something else what can user inform, about invalid request.
There is no used Apache nor any other web server, where some rules for URL rewriting could apply. Also often used change in web.xml with <transport-guarantee>CONFIDENTIAL</transport-guarantee> tag do not solve this problem, as there must be HTTP request, which is then redirected to HTTPS based on "redirectPort" param in connector configuration and in this case there is not plan to use any other port and it is not possible to combine HTTP and HTTPS listener together on one port.
Is there some way how to configure SSL listener, that way, that it refuse HTTP request, or automatically change to HTTPS?
JBoss 5.1.0
Your browser uses HTTP to talk to server, but on the server side is the security layer (around the HTTP) and it wants to do a SSL/TLS handshake. So the communication fails because client doesn't know about the security on the other side.
The client (browser) receives error message (binary data) from server. The client doesn't know what to do with them, so it presents them to a user as a web page content.
RFC-5246 states:
Error handling in the TLS Handshake protocol is very simple. When an
error is detected, the detecting party sends a message to the other
party. Upon transmission or receipt of a fatal alert message, both
parties immediately close the connection.
Undertow - a new web server in WildFly - is able to do HTTP Upgrade. But I'm not sure if the upgrade to SSL/TLS is already supported. Nevertheless, the problem with this scenario could be on the browser side.
I wish to setup an HTTPS proxy and have HTTP clients send requests securely to the proxy. For example, a browser can initiate a HTTP GET request which should be an encrypted request to the proxy and the proxy then removes the encryption and then passes the request to the end-site. Squid proxy can be set up to work like this (info here).
I have set up such a HTTPS enabled proxy. But I am unable to write my own HTTP clients to work with it. The same link above mentions that chrome is the only browser that supports such a proxy. I tested Chrome and it was able to work with such an HTTPS proxy.
I wish to gain an understanding of how such a proxy works so that I can write my own HTTP clients.
As I understand it, it's a connection to regular HTTP proxy BUT this connection is made over TLS. The client indeed needs to support this scheme explicitly and existing clients as-is can't be tuned up (without extra coding).
We have an Apache web server which acts as a proxy to a tomcat server.
Our web applications are hosted on the tomcat server and the external urls are mapped to the internal urls in the apache.
The protocol used for communication between apache and tomcat is ajp13.
We are required to send a parameter to the webapplication when the first request from a client reaches the webapplication i.e. when the login page is requested for.
The external url cannot be modified since it is already in use hence additional http get parameters cannot be specified.
Is it possible to inject a request parameter in apache so that by the time request ends up on tomcat it would have this parameter?
Create a servlet filter that checks if a particular cookie is set. If not, set the cookie and create a HttpServletRequestWrapper with the injected request parameter. Pass that wrapped request to chain.doFilter().
I have recently started my job as web application backend developer. I am bit stuck in understanding lifecycle of a Http request.
What I understood is
Every Http request first contacts a DNS server which resolves the request URL domain to a IP address.
After fetching the Webserver IP address request is forwarded to it(via PUT request). A webserver like apache handles this request and forwards this to application which has to handle this.
After this I am lost with
How response is sent by the application to the user who requested it and will Apcache involved in this?
Can I see the entire flow in my browser with some debugging tools?
Can someone refer some links to understand this in depth?
I think you are a bit wrong on your understanding of it.
If you go to www.google.com (not using any forms, just wanting the site), this is what happens:
First the browser needs to translate www.google.com to an IP address if it does not already know it. If it knows it, nothing happens at this point. If it does not know it, it contacts a DNS server to resolve the name.
Then browser will open a TCP connection to the IP address of www.google.com and send a HTTP GET request over. In this example it will be
GET / HTTP/1.1 Host: www.google.com
The server software will get this HTTP request. It will somehow generate a HTTP response and send that back trough the TCP connection. How the server does this is server software dependent. You can for example plug in application code in Apache, or just make Apache return a file from the filesystem. PHP is an application called by some software, which then generates the response sent to the browser. When the response is sent, in HTTP version 1.0 the connection is closed. HTTP 1.1 can have persistent connections though.
When the browser gets the response, it typically renders it on screen. The HTTP request is now done. A click on "search" will send a new request to the server.
GET, PUT, POST, DELETE and others are HTTP request methods. They have special meaning which you can see in the RFC.
Cookies are commonly used to identify the same user across multiple HTTP requests, called sessions. Therefore these cookies are called session cookies
You can debug the communication by using a network sniffer tool, for example Wireshark. Firefox has a third party plugin called Tamper Data that can change the request before they are sent to the server.
The HTTP RFC is a good source of how it all works.
while server receives the request from browser , the browser will be binded to some port on the host , ip address and port number of browser will be attached with the request that sends to server. server sends the responce to the ip address and port number
This is among the popular interview questions asked in various product based companies.
HTTP Is a request-response protocol. For example, a user agent initiates a request to a server, typically by opening a TCP/IP connection to a particular port on a host (port 80 by default). The request itself comprises:
a request line,
a set of request headers, and
an entity.
An HTTP server listening on that port waits for the client to send a request message. Upon receiving the request, the server sends a response that comprises:
a status line,
a set of response headers, and
an entity.
The entity in the request or response can be thought of simply as the payload, which may be binary data. The other items are readable ASCII characters. When the response has been completed, either the browser or the server may terminate the TCP/IP connection, or the browser can send another request.
I found this resource very helpful in understanding the steps taken during the HTTP lifecycle : quite interesting actually though, wasn't aware of all the intermediate steps especially w/the cache checking when determining the IP Address of a URL.
https://medium.com/#maneesha.wijesinghe1/what-happens-when-you-type-an-url-in-the-browser-and-press-enter-bb0aa2449c1a