How create WMS layer in GeoServer by REST API? - postgresql

Question

In PostgreSQL I have a scheme called geo. Inside that scheme, I have a table with a column which has a geometry data type.
I am new in GeoServer and want to know how to create WMS layer by REST API with data of that remote PostgreSQL database? According to the documentation I need to create workspace and datastore first, right? I'm a little confused. What sequence of actions should be? I will be grateful for any example!
Result of curl request:

Answer 1

The REST API works in exactly the same manner as the GUI, so the process is that you can optionally create a new workspace or use an existing one, you then create a store inside a workspace and then create layers from the store. Any layer will automatically become available as a WMS layer.
Create a new PostGIS store, generate a file with the connection details:
<dataStore>
<name>nyc</name>
<connectionParameters>
<host>localhost</host>
<port>5432</port>
<database>nyc</database>
<user>bob</user>
<passwd>postgres</passwd>
<dbtype>postgis</dbtype>
</connectionParameters>
</dataStore>
and POST it to the REST endpoint
curl -v -u admin:geoserver -XPOST -T <file.xml> -H "Content-type: text/xml"
http://localhost:8080/geoserver/rest/workspaces/<WORKSPACENAME>/datastores
Then publish the table as a layer
curl -v -u admin:geoserver -XPOST -H "Content-type: text/xml" -d "<featureType><name>buildings</name></featureType>" http://localhost:8080/geoserver/rest/workspaces/acme/datastores/nyc/featuretypes

Answer 2

optional.
Publishing a table from an existing PostGIS store.
on php curl.
function curl_post($url,$params) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HTTPHEADER, Array("Content-Type: text/xml"));
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_USERPWD,"user:password");//--> on geoserver.
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // Receive server response ...
$response = curl_exec($ch);
curl_close ($ch);
return $response;
}
//- table_name : xxx
//- work_space_name : your_workspace
//- store_name : dbtest
$layer_name = "xxx";
$params ="
<featureType>
<name>".$layer_name."</name>
<nativeName>".$layer_name."</nativeName>
<title>".$layer_name."</title>
<keywords>
<string>".$layer_name."</string>
<string>features</string>
</keywords>
<srs>EPSG:3857</srs>
<nativeBoundingBox>
<minx>1.0836244E7</minx>
<maxx>1.1759454E7</maxx>
<miny>625842.375</miny>
<maxy>2328151.75</maxy>
</nativeBoundingBox>
<latLonBoundingBox>
<minx>97.34363607648459</minx>
<maxx>105.63697261100442</maxx>
<miny>5.613037739416236</miny>
<maxy>20.464604971116074</maxy>
</latLonBoundingBox>
<projectionPolicy>FORCE_DECLARED</projectionPolicy>
<enabled>true</enabled>
<metadata>
<entry key=\"cachingEnabled\">false</entry>
</metadata>
<maxFeatures>0</maxFeatures>
<numDecimals>0</numDecimals>
</featureType>
";
$str_url = "http://xxx.co.uk/geoserver/rest/workspaces/**your_workspace**/datastores/**your_data_store**/featuretypes";
$rs = curl_post($str_url, $params);