Differences

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--- http_headers [2016/07/08 09:34] – luke7858
+++ http_headers [2024/05/23 07:26] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+~~NOCACHE~~
-^ Flag           ^ Description                                                        |
+====== HTTP Headers ======
-| -I, --head     | Fetch the HTTP-header only                                         |
+{{tabembed>[[curl_basics|Curl Basics, [[website_cloaking|Website Cloaking}}
-| -v, --verbose  | Fetching is more talkative. Used for debugging                     |
-| -s, --silent   | Silent or Quiet (Mute). Don't show progress meter or error messages|
-| -i, --include  | Header plus content                                                |
-| -X , --request | Specify a customer request when communicating with HTTP web server |
-| -L,            | Follow the redirect                                                |
-\\
-__**Troubleshooting a website**__. You can replace http://website.com with http://localhost if you wish to test the domain on the local machine
-<sxh bash>
-curl -LIX GET 12.34.56.78 -H 'Host: example.com'
-</sxh>
-\\
-\\
-The following command is used to test a https domain. -k will skip the certificate check
-<sxh bash>
-curl -LIkX GET https://website.com
-</sxh>
-\\
-\\
-**__Testing a vhost on the localhost__**
-<sxh bash>
-curl -LIvX GET localhost -H 'Host: vhost.com'
-</sxh>
-\\
-\\
-**__Body String Match__**
-\\
-<sxh bash>
-curl -sLX GET www.lukeslinux.co.uk | grep -i lukeslinux
-</sxh>
-<sxh bash>
-curl -isX GET lukeslinux.co.uk | grep Maintenance
-</sxh>
-Output:
-<sxh bash>
-<title>Days Out With Kids | Maintenance</title>
-                                    <h3>Sorry, Site Under Maintenance</h3>
-</sxh>
-Example without the s flag
-<sxh bash>
-curl -LiX GET https://tickets.daysoutwithkids.co.uk/longleat | grep Maintenance
-</sxh>
-Output:
-<sxh bash>
-  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
-                                 Dload  Upload   Total   Spent    Left  Speed
-  9885  100  9885    0     0   280k      0 --:--:-- --:--:-- --:--:-- 9653k
-        <title>Days Out With Kids | Maintenance</title>
-                                    <h3>Sorry, Site Under Maintenance</h3>
-</sxh>
-\\
-Curling localhost and ignoring ssl
-If the website has an ssl certificate you can also apply the 'k' option to bypass the certificate check. e.g:
-<sxh bash>
-curl -ikL localhost -H 'https://website.com' | grep body_match_string
-</sxh>
-\\
-\\
-**__Time__**
-<sxh bash>
-time for i in {1..10}; do curl -IsX GET http://example.co.uk | grep 'HTTP/1.1'; done
-</sxh>
-**__Using Lynx__**
-\\
-Note: This is not as accurate as curl
-Testing to see if a website returns a certain string. Body match strings are often used in monitoring alerts
-<sxh bash>
-lynx -dump http://lukeslinuxlessons.co.uk | grep 'string match'
-</sxh>
-\\
-\\
-=== Time to First Byte ===
-Make sure you replace x.x.x.x with the server IP and Host: Example.com with the website
-<sxh bash>
-curl -sko /dev/null -w "\ncontent_type=%{content_type}\nhttp_code=%{http_code}\nsize_download=%{size_download}\nsize_header=%{size_header}\nsize_request=%{size_request}\nspeed_download=%{speed_download}\ntime_connect=%{time_connect}\ntime_namelookup=%{time_namelookup}\ntime_pretransfer=%{time_pretransfer}\ntime_redirect=%{time_redirect}\ntime_starttransfer=%{time_starttransfer}\ntime_total=%{time_total}\nurl_effective=%{url_effective}\n\n" -H "Host: example.com" http://x.x.x.x
-</sxh>
-\\
-\\
-\\
-__**HTTP AUTHENTICATION**__
-<sxh bash>
-curl --user luke:password http://lukeslinux.co.uk/secret
-</sxh>