db manager: add credentials to postgis rasters (fixes #13594)

Author: jef-n

python/core/qgserror.sip

@@ -71,7 +71,7 @@ class QgsError
      */
     QString message( QgsErrorMessage::Format theFormat = QgsErrorMessage::Html ) const;
 
-    /** Short error descriprion, usually the first error in chain, the real error.
+    /** Short error description, usually the first error in chain, the real error.
      *  @return error description
      */
     QString summary() const;

python/plugins/db_manager/db_plugins/postgis/plugin.py

@@ -258,8 +258,9 @@ def info(self):
 
         return PGRasterTableInfo(self)
 
-    def gdalUri(self):
-        uri = self.database().uri()
+    def gdalUri(self, uri=None):
+        if not uri:
+            uri = self.database().uri()
         schema = (u'schema=%s' % self.schemaName()) if self.schemaName() else ''
         dbname = (u'dbname=%s' % uri.database()) if uri.database() else ''
         host = (u'host=%s' % uri.host()) if uri.host() else ''
@@ -285,9 +286,25 @@ def mimeUri(self):
         return uri
 
     def toMapLayer(self):
-        from qgis.core import QgsRasterLayer, QgsContrastEnhancement
+        from qgis.core import QgsRasterLayer, QgsContrastEnhancement, QgsDataSourceURI, QgsCredentials
 
         rl = QgsRasterLayer(self.gdalUri(), self.name)
+        if not rl.isValid():
+            err = rl.error().summary()
+            uri = QgsDataSourceURI(self.database().uri())
+            conninfo = uri.connectionInfo()
+            username = uri.username()
+            password = uri.password()
+
+            for i in range(3):
+                (ok, username, password) = QgsCredentials.instance().get(conninfo, username, password, err)
+                if ok:
+                    uri.setUsername(username)
+                    uri.setPassword(password)
+                    rl = QgsRasterLayer(self.gdalUri(uri), self.name)
+                    if rl.isValid():
+                        break
+
         if rl.isValid():
             rl.setContrastEnhancement(QgsContrastEnhancement.StretchToMinimumMaximum)
         return rl

src/core/qgserror.h

@@ -108,7 +108,7 @@ class CORE_EXPORT QgsError
      */
     QString message( QgsErrorMessage::Format theFormat = QgsErrorMessage::Html ) const;
 
-    /** Short error descriprion, usually the first error in chain, the real error.
+    /** Short error description, usually the first error in chain, the real error.
      *  @return error description
      */
     QString summary() const;