6. Configuração avançada

6.1. Registrando

To log requests sent to the server, you have to set the following environment variable:

With the following variables the logging can be further customized:

6.2. Variáveis ambientais

Você pode configurar alguns aspectos do QGIS Server configurando environment variables.

According to the HTTP server and how you run QGIS Server, there are several ways to define these variables. This is fully described in Servidor HTTP Apache.

Nome

Descrição

Padrão

Serviços

QGIS_OPÇÕES_CAMINHO

Specifies the path to the directory with settings. It works the same way as QGIS application --optionspath option. It is looking for settings file in <QGIS_OPTIONS_PATH>/QGIS/QGIS3.ini.

‘’

Tudo

QGIS_PLUGINPATH

Useful if you are using Python plugins for the server, this sets the folder that is searched for Python plugins.

‘’

Tudo

QGIS_PROJETO_ARQUIVO

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).

Note that you may also indicate a project stored in PostgreSQL, e.g. postgresql://localhost:5432?sslmode=disable&dbname=mydb&schema=myschema&project=myproject.

‘’

Tudo

QGIS_SERVER_API_RESOURCES_DIRECTORY

Diretório base para todos os recursos estáticos OGC API (tais como OAPIF/WFS3) (modelos HTML, CSS, JS, …)

depende do pacote

WFS

QGIS_SERVER_API_WFS3_MAX_LIMIT

Valor máximo para “limite” em uma solicitação de feições.

10000

WFS

QGIS_SERVER_CACHE_DIRECTORY

Specifies the network cache directory on the filesystem.

cache in profile directory

Tudo

QGIS_SERVER_CACHE_SIZE

Sets the network cache size in MB.

50 MB

Tudo

QGIS_SERVER_DISABLE_GETPRINT

Esta é uma opção no nível do projeto para melhorar o tempo de leitura do projeto desativando o carregamento de layouts.

Activating this option disables the QGIS WMS GetPrint request. Set this QGIS project flag to not load layouts.

falso

WMS

QGIS_SERVER_IGNORE_BAD_LAYERS

“Bad” layers are layers that cannot be loaded. The default behavior of QGIS Server is to consider the project as not available if it contains a bad layer.

The default behavior can be overridden by setting this variable to 1 or true. In this case, “bad” layers will just be ignored, and the project will be considered valid and available.

falso

Tudo

QGIS_SERVER_LANDING_PAGE_PREFIX

Prefixo do componente do caminho da URL base da página inicial

“”

Tudo

QGIS_SERVER_LANDING_PAGE_PROJECTS_DIRECTORIES

Directories used by the landing page service to find .qgs and .qgz projects

“”

Tudo

QGIS_SERVER_LANDING_PAGE_PROJECTS_PG_CONNECTIONS

PostgreSQL connection strings used by the landing page service to find projects

“”

Tudo

QGIS_SERVER_LOG_FILE

Especificar o caminho e o nome do arquivo. Certifique-se de que o servidor tenha as permissões adequadas para gravar no arquivo. O arquivo deve ser criado automaticamente, basta enviar algumas requisições para o servidor. Se não estiver lá, verifique as permissões.

Aviso

QGIS_SERVER_LOG_FILE is deprecated since QGIS 3.4, use QGIS_SERVER_LOG_STDERR instead. File logging support will be removed in QGIS 4.0.

‘’

Tudo

QGIS_SERVER_LOG_LEVEL

Specify desired log level. Available values are:

  • 0 ou INFO (registrar todas as solicitações)

  • 1 ou ALERTA

  • 2 or CRITICAL (log just critical errors, suitable for production purposes)

0

Tudo

QGIS_SERVER_LOG_PROFILE

Add detailed profile information to the logs, only effective when QGIS_SERVER_LOG_LEVEL=0

falso

Tudo

QGIS_SERVER_LOG_STDERR

Activate logging to stderr. This variable has no effect when QGIS_SERVER_LOG_FILE is set.

  • 0 ou falso (não diferencia maiúsculas de minúsculas)

  • 0 ou verdadeiro (não diferencia maiúsculas de minúsculas)

falso

Tudo

QGIS_SERVER_MAX_THREADS

Number of threads to use when parallel rendering is activated. If value is -1 it uses the number of processor cores.

-1

Tudo

QGIS_SERVER_OVERRIDE_SYSTEM_LOCALE

Sets LOCALE to be used by QGIS server. The default value is empty (no override).

Example: de_CH.utf8

‘’

Tudo

QGIS_SERVER_PARALLEL_RENDERING

Activates parallel rendering for WMS GetMap requests. It’s disabled (false) by default. Available values are:

  • 0 ou falso (não diferencia maiúsculas de minúsculas)

  • 0 ou verdadeiro (não diferencia maiúsculas de minúsculas)

falso

WMS

QGIS_SERVER_SHOW_GROUP_SEPARATOR

Defines whether a group separator (e.g. thousand separator) should be used for numeric values (e.g. in GetFeatureInfo responses). The default value is 0.

  • 0 ou falso (não diferencia maiúsculas de minúsculas)

  • 0 ou verdadeiro (não diferencia maiúsculas de minúsculas)

falso

WMS

QGIS_SERVER_TRUST_LAYER_METADATA

This is an option at the project level to improve project read time by using the vector layer extents defined in the project metadata and disabling the check for PostgreSQL/PostGIS layer primary key uniqueness.

Trusting layer metadata can be forced by setting this variable to 1 or true. The vector layer’s extent will then be the one defined in the project, and the PostgreSQL/PostGIS layer’s primary key defined in the data source is considered as unique without a check.

Do not use it if layers’ extent is not fixed during the project’s use.

falso

Tudo

QGIS_SERVER_WMS_MAX_HEIGHT / QGIS_SERVER_WMS_MAX_WIDTH

Maximum height/width for a WMS request. The most conservative between this and the project one is used. If the value is -1, it means that there is no maximum set.

-1

WMS

QUERY_STRING

The query string, normally passed by the web server. This variable can be useful while testing QGIS server binary from the command line.

For example for testing a GetCapabilities request on the command line to a project that also requires a PostgreSQL connection defined in a pg_service.conf file:

PGSERVICEFILE=/etc/pg_service.conf \
QUERY_STRING="MAP=/home/projects/world.qgs&SERVICE=WMS&REQUEST=GetCapabilities" \
/usr/lib/cgi-bin/qgis_mapserv.fcgi

The result should be either the content of the GetCapabilities response or, if something is wrong, an error message.

‘’

Tudo

6.3. Settings summary

When QGIS Server is starting, you have a summary of all configurable parameters thanks to environment variables. Moreover, the value currently used and the origin is also displayed.

Por exemplo com spawn-fcgi:

export QGIS_OPTIONS_PATH=/home/user/.local/share/QGIS/QGIS3/profiles/default/
export QGIS_SERVER_LOG_STDERR=1
export QGIS_SERVER_LOG_LEVEL=2
spawn-fcgi -f /usr/lib/cgi-bin/qgis_mapserv.fcgi -s /tmp/qgisserver.sock -U www-data -G www-data -n

 QGIS Server Settings:

   - QGIS_OPTIONS_PATH / '' (Override the default path for user configuration): '/home/user/.local/share/QGIS/QGIS3/profiles/default/' (read from ENVIRONMENT_VARIABLE)

   - QGIS_SERVER_PARALLEL_RENDERING / '/qgis/parallel_rendering' (Activate/Deactivate parallel rendering for WMS getMap request): 'true' (read from INI_FILE)

   - QGIS_SERVER_MAX_THREADS / '/qgis/max_threads' (Number of threads to use when parallel rendering is activated): '4' (read from INI_FILE)

   - QGIS_SERVER_LOG_LEVEL / '' (Log level): '2' (read from ENVIRONMENT_VARIABLE)

   - QGIS_SERVER_LOG_STDERR / '' (Activate/Deactivate logging to stderr): '1' (read from ENVIRONMENT_VARIABLE)

   - QGIS_PROJECT_FILE / '' (QGIS project file): '' (read from DEFAULT_VALUE)

   - MAX_CACHE_LAYERS / '' (Specify the maximum number of cached layers): '100' (read from DEFAULT_VALUE)

   - QGIS_SERVER_CACHE_DIRECTORY / '/cache/directory' (Specify the cache directory): '/root/.local/share/QGIS/QGIS3/profiles/default/cache' (read from DEFAULT_VALUE)

   - QGIS_SERVER_CACHE_SIZE / '/cache/size' (Specify the cache size): '52428800' (read from INI_FILE)

 Ini file used to initialize settings: /home/user/.local/share/QGIS/QGIS3/profiles/default/QGIS/QGIS3.ini

In this particular case, we know that QGIS_SERVER_MAX_THREADS and QGIS_SERVER_PARALLEL_RENDERING values are read from the ini file found in QGIS_OPTIONS_PATH directory (which is defined through an environment variable). The corresponding entries in the ini file are /qgis/max_threads and /qgis/parallel_rendering and their values are true and 4 threads.

6.4. Connection to service file

In order to make apache aware of the PostgreSQL service file (see the PostgreSQL Service connection file section) you need to make your *.conf file look like:

SetEnv PGSERVICEFILE /home/web/.pg_service.conf

<Directory "/home/web/apps2/bin/">
  AllowOverride None
.....

6.5. Add fonts to your linux server

Tenha em mente que você pode usar projetos QGIS que apontam para fontes que podem não existir por padrão em outras máquinas. Isso significa que se você compartilhar o projeto, ele poderá parecer diferente em outras máquinas (se as fontes não existirem na máquina de destino).

Para garantir que isso não aconteça, você só precisa instalar as fontes ausentes na máquina de destino. Fazer isso em sistemas desktop geralmente é trivial (clique duas vezes nas fontes).

Para linux, se você não tiver um ambiente de desktop instalado (ou preferir a linha de comando), precisará:

  • On Debian based systems:

    sudo su
    mkdir -p /usr/local/share/fonts/truetype/myfonts && cd /usr/local/share/fonts/truetype/myfonts
    
    # copy the fonts from their location
    cp /fonts_location/* .
    
    chown root *
    cd .. && fc-cache -f -v
    
  • On Fedora based systems:

    sudo su
    mkdir /usr/share/fonts/myfonts && cd /usr/share/fonts/myfonts
    
    # copy the fonts from their location
    cp /fonts_location/* .
    
    chown root *
    cd .. && fc-cache -f -v