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Questions tagged [http]

HTTP stands for Hyper Text Transfer Protocol and is the protocol used to transfer information around the World Wide Web.

HTTP is just one communications protocol on the web. Others include:

  • Transmission Control Protocol (TCP)
  • User Datagram Protocol (UDP)
  • Internet Control Message Protocol (ICMP)
  • Post Office Protocol (POP3)
  • File Transfer Protocol (FTP)
  • Internet Message Access Protocol (IMAP)

HTTP on Wikipedia

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What’s the point in having “www” in a URL?

Other than for historical reasons, is there is reason to have “www” in a URL? Should I create a permanent redirect from www.xyz.com to xyz.com, or from xyz.com to www.xyz.com? Which one would you suggest and why?
Quintin Par
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Is it bad to redirect http to https?

I just installed an SSL Certificate on my server. It then set up a redirect for all traffic on my domain on Port 80 to redirect it to Port 443. In other words, all my http://example.com traffic is now redirected to the appropriate…
JasonDavis
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How to reply with 200 from Nginx, without serving a file?

I have configured Apache to send back a 200 response without serving any file with this configuration line Redirect 200 /hello Can I do this with Nginx? I don't want to serve a file, I just want the server to respond with a 200 (I'm just logging…
Theo
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Can you pass user/pass for HTTP Basic Authentication in URL parameters?

I believe this is not possible, but someone I know insisted that it works. I don't even know what parameters to try, and I haven't found this documented anywhere. I tried http://myserver.com/~user=username&password=mypassword but it doesn't…
ripper234
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How to list Apache enabled modules?

Is there a command that list all enabled Apache modules?
supercobra
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What is the purpose of the ".well-known"-folder?

If've found a new error message in our log files and would like to know, for what this .well_known folder is used for. Which application/client would need to access such a folder and which application would create files inside it? Here are some…
Sascha
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How do high traffic sites service more than 65535 TCP connections?

If there is a limit on the number of ports one machine can have and a socket can only bind to an unused port number, how do servers experiencing extremely high amounts (more than the max port number) of requests handle this? Is it just done by…
alh
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Human readable format for http headers with tcpdump

I would like to view the HTTP headers sent from Apache (listening on port 80) to Tomcat (on port 4080) in a Linux machine. According to Wikipedia, Header fields are colon-separated name-value pairs in clear-text string format. I've tried some…
Adam Matan
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Best way to redirect all HTTP to HTTPS in IIS

We want ALL sites on our webserver (IIS 10) to enforce SSL (ie redirect HTTP to HTTPS). We are currently 'Requiring SSL' on each site and setting up a 403 error handler to perform a 302 redirect to the https address for that specific site. This…
userSteve
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IIS 7.5 (Windows 7) - HTTP Error 401.3 - Unauthorized

I'm trying to test my ASP.Net website on localhost and I'm getting this error: HTTP Error 401.3 - Unauthorized You do not have permission to view this directory or page because of the access control list (ACL) configuration or encryption settings…
Nathan Ridley
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How to make wireshark filter POST-requests only?

How to make wireshark filter POST-requests only?
Ilya Smagin
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104: Connection reset by peer while reading response header from upstream (Nginx)

I have a server which was working ok until 3rd Oct 2013 at 10:50am when it began to intermittently return "502 Bad Gateway" errors to the client. Approximately 4 out of 5 browser requests succeed but about 1 in 5 fail with a 502. The nginx error log…
Nigel Alderton
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Is there a maximum size for content of an HTTP POST?

Is there a maximum size for an HTTP POST? And if there is a max size, is it determined by the protocol or is it at the discretion of the server?
user11480
62
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Unusual HEAD requests to nonsense URLs from Chrome

I have noticed unusual traffic coming from my workstation the last couple of days. I am seeing HEAD requests sent to random character URLs, usually three or four within a second, and they appear to be coming from my Chrome browser. The requests…
JeremyDWill
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Connecting to HTTPS with netcat (nc)

I'm working on a homework assignment for my college course. The task is to fetch web pages on HTTPS using nc (netcat). To fetch a page over HTTP, I can simply do the following: cat request.txt | nc -w 5 80 In request.txt I have an HTTP…
Oto Brglez
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