[MapServer-dev] FW: [MapServer/MapServer] Use of HEAD enstead of GET return different headers (Issue #6826)

[Seth G]

Hi Steve,

There doesn't seem any benefit in trying to support this. The response type and content length is generated dynamically by MapServer processing the request, so any monittoring may as well use the GET requests. 
The only alternative I can think of is to process the full request and then strip out the request body as a last step in mapserv. 

Seth

--
web:https://geographika.net
twitter: @geographika

On Thu, Feb 9, 2023, at 11:36 PM, Lime, Steve D (MNIT) via MapServer-dev wrote:
> Just wanted to see if there were any other perspectives. MapServer itself doesn’t accept HEAD requests, nor does it seem possible. It’s Apache is returning the 200 on an HEAD request saying that the document (i.e. the cgi script) exists. My inclination is to close the ticket as invalid.
>  
> --Steve
>  
> *From:* pgneogeo <notifications at github.com> 
> *Sent:* Tuesday, February 7, 2023 7:57 AM
> *To:* MapServer/MapServer <MapServer at noreply.github.com>
> *Cc:* Subscribed <subscribed at noreply.github.com>
> *Subject:* [MapServer/MapServer] Use of HEAD enstead of GET return different headers (Issue #6826)
> 
>  
> 
> *This message may be from an external email source.*
> Do not select links or open attachments unless verified. Report all suspicious emails to Minnesota IT Services Security Operations Center.
>  
> 
> Expected behavior and actual behavior.
> 
> Using GET and HEAD as HTTP commands should return the same headers.
> 
> Steps to reproduce the problem.
> 
> Mapserver is behind apache, with the only interesting configuration is :
> 
> `   RewriteEngine on`
> `    RewriteRule ^/maps/([^/]*)$ /wxs/mapserv?map=/maps/$1.map [PT,QSA]`
> The version installed is 7.6.2
> 
> When I call my server with curl, for example with this call, I receive a png, with the according header `Content-Type: image/png`
> 
> `curl https://[MYDOMAIN]/maps/osm-default\?VERSION\=1.1.1\&REQUEST\=GetMap\&LAYERS\=default\&WIDTH\=256\&HEIGHT\=256\&FORMAT\=image/png\&SRS\=EPSG:3857\&BBOX\=670199.864,6227477.568,675091.833,6232369.538 <https://[MYDOMAIN]/maps/osm-default/?VERSION\=1.1.1\&REQUEST\=GetMap\&LAYERS\=default\&WIDTH\=256\&HEIGHT\=256\&FORMAT\=image/png\&SRS\=EPSG:3857\&BBOX\=670199.864,6227477.568,675091.833,6232369.538>`
> 
> When I call the exact same url with `curl -I` to receive only the headers (for monitoring purpose), the headers are different, especially the Content-Type : `Content-Type: text/html`
> 
> The difference is that curl use the command HEAD instead of GET, but the headers should be equivalent.
> 
> Operating system
> 
> Debian bullseye 64 bit
> 
> MapServer version and installation method
> 
> 7.6.2 version, I am not sure of the way it was installed
> 
> —
> Reply to this email directly, view it on GitHub <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMapServer%2FMapServer%2Fissues%2F6826&data=05%7C01%7Csteve.lime%40state.mn.us%7C6f25f6c40e5942d2212608db09132d7f%7Ceb14b04624c445198f26b89c2159828c%7C0%7C0%7C638113750203456390%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=AUF8QZNnegDk52iGhP6W8yLnobqqURR3Z2ie2QgGHAA%3D&reserved=0>, or unsubscribe <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FAAMGN63FTCSPJGSPGXEDK6DWWJICRANCNFSM6AAAAAAUT75DNI&data=05%7C01%7Csteve.lime%40state.mn.us%7C6f25f6c40e5942d2212608db09132d7f%7Ceb14b04624c445198f26b89c2159828c%7C0%7C0%7C638113750203456390%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=QefxcSCmmEHDP28SJkgkEgCenvH3kKPNA97%2BOEjoPVQ%3D&reserved=0>.
> You are receiving this because you are subscribed to this thread.Message ID: <MapServer/MapServer/issues/6826 at github.com>
> 
> _______________________________________________
> MapServer-dev mailing list
> MapServer-dev at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/mapserver-dev
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/mapserver-dev/attachments/20230210/5e4bb39b/attachment-0001.htm>