404 error for resources (images) on a subdomain that contains underscore (_)

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Miloš Dakić

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Apr 30, 2016, 1:22:39 PM4/30/16
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I am having this weird issue where I get 404 error for resources processed by pagespeed (rewritten images for example) when resource URL contains underscore in subdomain, for example:


the same url works, just when the underscore is removed:



Also tried many other combinations, its always that if underscore is present in subdomain I get 404 error, and when removed, and used with any other combination, it works.

Any ideas why this is happening? Is this a bug in PageSpeed? 


Tested on Apache 2.4.7 on Ubuntu 14.04 Linux.

Joshua Marantz

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Apr 30, 2016, 1:34:10 PM4/30/16
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I don't think so.  However, you should note that "_" is not valid in domain names.  See https://www.ietf.org/rfc/rfc1035.txt .  You can use "-" though.  

-Josh


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Steve Hill

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May 2, 2016, 11:43:45 AM5/2/16
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Miloš, do non pagespeed links work with the underscore? For instance https://company_name.blogin.co/uploaded/1d41009f10b26e4a9/thumbs/xdaxavatar-1.jpeg

To view this discussion on the web visit https://groups.google.com/d/msgid/mod-pagespeed-discuss/CAGKR%2BECzaou-QQL_1BAnkXoNdbe_MJiN3GuabhhFt93emCm-qw%40mail.gmail.com.

Miloš Dakić

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May 2, 2016, 6:14:43 PM5/2/16
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Yes, when I turn off pagespeed links with underscore work. They just do not when pagespeed is turned on.

Here are few examples:




On Monday, May 2, 2016 at 5:43:45 PM UTC+2, Steve Hill wrote:
Miloš, do non pagespeed links work with the underscore? For instance https://company_name.blogin.co/uploaded/1d41009f10b26e4a9/thumbs/xdaxavatar-1.jpeg
On Sat, Apr 30, 2016 at 1:33 PM, 'Joshua Marantz' via mod-pagespeed-discuss <mod-pagesp...@googlegroups.com> wrote:
I don't think so.  However, you should note that "_" is not valid in domain names.  See https://www.ietf.org/rfc/rfc1035.txt .  You can use "-" though.  

-Josh

On Sat, Apr 30, 2016 at 1:22 PM, Miloš Dakić <mi...@happynovisad.com> wrote:
I am having this weird issue where I get 404 error for resources processed by pagespeed (rewritten images for example) when resource URL contains underscore in subdomain, for example:


the same url works, just when the underscore is removed:



Also tried many other combinations, its always that if underscore is present in subdomain I get 404 error, and when removed, and used with any other combination, it works.

Any ideas why this is happening? Is this a bug in PageSpeed? 


Tested on Apache 2.4.7 on Ubuntu 14.04 Linux.

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