Measuring response time from a URL

Hi All,

I want to execute a shell script which returns the response time from
a URL (using wget(?)). Can this be done through a shell script and
how? The OS in linux.


Thanks in advance,

ZM

On 4/2/2008 9:24 AM, Zinger wrote:
> Hi All,
>
> I want to execute a shell script which returns the response time from
> a URL (using wget(?)). Can this be done through a shell script and
> how? The OS in linux.

"time" may be all you need:

$ time curl http://www.gnu.org/index.html >/dev/null 2>&1

real    0m0.304s
user    0m0.030s
sys     0m0.077s

Depends what you're really looking for...

Regards,

Ed.

Zinger wrote:

> Hi All,
>
> I want to execute a shell script which returns the response time from
> a URL (using wget(?)). Can this be done through a shell script and
> how? The OS in linux.

Don't know what you mean by "response time", however try this:

$ time wget your://url.here

--
All the commands are tested with bash and GNU tools, so they may use
nonstandard features. I try to mention when something is nonstandard (if
I'm aware of that), but I may miss something. Corrections are welcome.

On 2008-04-02, Zinger <zmasood@gmail.com> wrote:
> Hi All,
>
> I want to execute a shell script which returns the response time from
> a URL (using wget(?)). Can this be done through a shell script and
> how? The OS in linux.
>
>
> Thanks in advance,
>
> ZM
>
time wget http://example.com/website


--
Christopher Mattern

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On Apr 2, 11:43 am, Chris Mattern <sys...@sumire.gwu.edu> wrote:
> On 2008-04-02, Zinger <zmas...@gmail.com> wrote:> Hi All,
> 
> 
> 
>
> time wgethttp://example.com/website
>
> --
>              Christopher Mattern
>
> NOTICE
> Thank you for noticing this new notice
> Your noticing it has been noted
> And will be reported to the authorities




Hi,

Thanks. As I mentioned, I am interested in how quickly the page I am
trying to get opens up. So would "time" get me the response time from
the URL? e.g. how long did the cnn.com page took to say open up (just
as in it would have opened through a browser) in the example below? If
yes then what is the value of response time? Is it 0.411seconds?

==================
time wget cnn.com
--12:07:27--  http://cnn.com/
=> `index.html'
Resolving cnn.com... 64.236.16.20, 64.236.16.52, 64.236.24.12, ...
Connecting to cnn.com[64.236.16.20]:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://www.cnn.com/ [following]
--12:07:27--  http://www.cnn.com/
=> `index.html'
Resolving www.cnn.com... 64.236.24.12, 64.236.29.120,
64.236.91.21, ...
Connecting to www.cnn.com[64.236.24.12]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 91,412 [text/html]

100%
 [=======================================
====================================
=======================>]
91,412       495.93K/s

12:07:27 (494.95 KB/s) - `index.html' saved [91,412/91,412]


real    0m0.411s
user    0m0.003s
sys     0m0.002s
==========================

Zinger wrote:

> Hi,
>
> Thanks. As I mentioned, I am interested in how quickly the page I am
> trying to get opens up.
> So would "time" get me the response time from the URL? e.g. how long did
> the cnn.com page took to say open up (just as in it would have opened
> through a browser) in the example below?

So it seems you want to know the time it takes to see the page completely
loaded in your browser (thus including objects referenced by that page).
Note that his time may be different from the time needed to transfer all the
objects across the network, since some objects (eg, java applets, flash
movies) may need some time to initialize inside the browser, even when the
page is already loaded.
Also, there are other factors that affect the overall time, such as DNS
lookups.

That said, the -p option to wget may probably suit your needs. From the man
page (which you should read anyway):

-p
--page-requisites
This option causes Wget to download all the files that are necessary to
properly display a given HTML page. This includes such things as
inlined images, sounds, and referenced stylesheets.

Read the man page, especially the full description for the -p option. You
may want to use additional options, as indicated.

> If yes then what is the value of response time? Is it 0.411seconds?
>[cut]
> real    0m0.411s
> user    0m0.003s
> sys     0m0.002s
> ==========================

man time.

The elapsed time is the one listed as "real".

--
All the commands are tested with bash and GNU tools, so they may use
nonstandard features. I try to mention when something is nonstandard (if
I'm aware of that), but I may miss something. Corrections are welcome.