<p dir="ltr">Hi! I just installed QGIS server on my windows server under Apache HTTPD and postgres in the sabe server and works fine. There after if you want to show the qgis projects on a map you should install QGIS Web Client or Lizmap. In order to serve WMS, WFS , etc qgis project should no be saved on postgis, otherwise will require extra configuration.<br>
Good luck! <br>
Abel</p>
<br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Den fre 6 sep. 2024 16:09User Adminofff via QGIS-User <<a href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a>> skrev:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<div style="font-family:-moz-fixed;font-size:13px" lang="x-unicode">Hi,
<br>
<br>
I'm trying to make QGIS Server to serve projects from PostgreSQL
database on the web.
<br>
Could anyone tell me please, is it possible to do that, or I can
serve only files?
<br>
<br>
The general workflow should look like this:
<br>
<br>
1. Operators with QGIS Desktop are connecting to PostgreSQL, and
create/modify projects in it.
<br>
No files are involved. This part works, I was able to save test
project on one system, and open it on the other.
<br>
<br>
2. After finishing project creation/modification, Operators send a
link to it to the consumers/implementors.
<br>
The idea is to be able to view the project in a browser on any
device. No editing is needed, at least at this moment.
<br>
I've installed QGIS Server on the same host as PostgreSQL, set
nginx/related stuff, and tested that it successfully serves file
project.
<br>
Then I've tried to get the project from database. qgis user, under
which QGIS server is run, was allowed passwordless connection to
PostgreSQL via localhost.
<br>
<br>
Having test URL for file like this
<br>
<a href="https://domain.com/qgisserver/cgi-bin/qgis_mapserv.fcgi?LAYERS=countries&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&CRS=EPSG:4326&WIDTH=400&HEIGHT=200&BBOX=-90,-180,90,180&MAP=/home/qgis/projects/world.qgs" target="_blank" rel="noreferrer">https://domain.com/qgisserver/cgi-bin/qgis_mapserv.fcgi?LAYERS=countries&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&CRS=EPSG:4326&WIDTH=400&HEIGHT=200&BBOX=-90,-180,90,180&MAP=/home/qgis/projects/world.qgs</a>
<br>
<br>
I've replaced file path with naive PostgreSQL URL like this
<br>
<a href="https://domain.com/qgisserver/cgi-bin/qgis_mapserv.fcgi?LAYERS=countries&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&CRS=EPSG:4326&WIDTH=400&HEIGHT=200&BBOX=-90,-180,90,180&MAP=postgresql://127.0.0.1:5432?sslmode=disable&dbname=qgis&schema=world&project=world" target="_blank" rel="noreferrer">https://domain.com/qgisserver/cgi-bin/qgis_mapserv.fcgi?LAYERS=countries&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&CRS=EPSG:4326&WIDTH=400&HEIGHT=200&BBOX=-90,-180,90,180&MAP=postgresql://127.0.0.1:5432?sslmode=disable&dbname=qgis&schema=world&project=world</a>
<br>
But got this error:
<br>
<br>
<ServerException>
<br>
Project file error. For OWS services: please provide a SERVICE and
a MAP parameter pointing to a valid QGIS project file
<br>
</ServerException>
<br>
<br>
The error says that QGIS Server wants file, no mentions about
database.
<br>
On other hand, documentation below says that for MAP parameter
either file path or PostgreSQL URL is needed, so it should work?
<br>
<br>
<a href="https://docs.qgis.org/3.34/en/docs/server_manual/config.html#qgis-server-envvar" target="_blank" rel="noreferrer">https://docs.qgis.org/3.34/en/docs/server_manual/config.html#qgis-server-envvar</a>
<br>
QGIS_PROJECT_FILE
<br>
The .qgs or .qgz project file, normally passed as a parameter in
the query string (with MAP), you can also set it as an environment
variable (for example by using mod_rewrite Apache module).
<br>
<br>
**Note that you may also indicate a project stored in
PostgreSQL**, e.g.
postgresql://localhost:5432?sslmode=disable&dbname=mydb&schema=myschema&project=myproject
or inside a geopackage file, e.g.
geopackage:/path/to/geopackage/file.gpkg?projectName=myProjectName.
<br>
<br>
<br>
Searching in the Internet for the error above, I've found this bug
report
<br>
<a href="https://github.com/qgis/QGIS/issues/31192" target="_blank" rel="noreferrer">https://github.com/qgis/QGIS/issues/31192</a>
<br>
<br>
From which I've got the idea to encode PostgreSQL URL in test URL,
but it didn't work with the same error as above.
<br>
Also, it looks like report author is connecting with QGIS Desktop
to QGIS Server, not browser, so this is not my case?
<br>
Also-also, as I've stuck with nginx for unrelated to QGIS reasons,
I cannot test proposed there Apache rewrite magic.
<br>
<br>
I've tried to see if there is anything useful in QGIS Server logs,
but there are no any related messages in them.
<br>
I've set QGIS_SERVER_LOG_PROFILE to true, but that didn't change
anything. I see my request to QGIS server only in nginx logs, but
nothing in QGIS Server logs, and no even failed connection
attempts in PostgreSQL logs.
<br>
<br>
So, is there any way to have PostreSQL projects served via QGIS
Server, or I can use only files? <span title=":)"></span>
<br>
</div>
</div>
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</blockquote></div>