console: make the upper limit for dimensions configurable

console/config.go

@@ -19,6 +19,8 @@ type Configuration struct {
 	DefaultVisualizeOptions VisualizeOptionsConfiguration
 	// HomepageTopWidgets defines the list of widgets to display on the home page.
 	HomepageTopWidgets []string `validate:"dive,oneof=src-as dst-as src-country dst-country exporter protocol etype src-port dst-port"`
+	// DimensionsLimit put an upper limit to the number of dimensions to return.
+	DimensionsLimit int `validate:"min=10"`
 }
 
 // VisualizeOptionsConfiguration defines options for the "visualize" tab.
@@ -43,6 +45,7 @@ func DefaultConfiguration() Configuration {
 			Dimensions: []queryColumn{queryColumnSrcAS},
 		},
 		HomepageTopWidgets: []string{"src-as", "src-port", "protocol", "src-country", "etype"},
+		DimensionsLimit:    50,
 	}
 }
 

console/data/docs/02-configuration.md

@@ -470,12 +470,17 @@ The main components of the console service are `http`, `console`,
 `authentication` and `database`. `http` accepts the [same
 configuration](#http) as for the inlet service.
 
-The console itself accepts the `default-visualize-options` and the
-`homepage-top-widgets` keys. The first one defines default options for
-the "visualize" tab and the second one defines the widgets to display
+The console itself accepts the following keys:
+
+ - `default-visualize-options` to define default options for the
+   "visualize" tab and the second one defines the widgets to display
    on the home page (among `src-as`, `dst-as`, `src-country`,
    `dst-country`, `exporter`, `protocol`, `etype`, `src-port`, and
-`dst-port`). Here is an example:
+   `dst-port`)
+ - `homepage-top-widgets` to define the widgets to display on the home page
+ - `dimensions-limit` to set the upper limit of the number of returned dimensions
+
+Here is an example:
 
 ```yaml
 console:

console/data/docs/99-changelog.md

@@ -13,7 +13,9 @@ identified with a specific icon:
 
 ## Unreleased
 
-- 🌱 *docker*: Split demo exporters out of `docker-compose.yml`.
+- 🌱 *docker*: Split demo exporters out of `docker-compose.yml`
+- 🌱 *console*: Make the upper limit for dimensions configurable
+  (`console.dimensions-limit`)
 
 ## 1.6.0 - 2022-09-30
 
@@ -27,7 +29,7 @@ but also the AS paths and the communities. Check `inlet.bmp` and
 - ✨ *inlet*: add `inlet.snmp.agents` to override exporter IP address for SNMP queries
 - 🩹 *inlet*: handle sFlow specific interface number for locally
   originated/terminated traffic, discarded traffic and traffic sent to
-  multiple interfaces.
+  multiple interfaces
 - 🌱 *build*: Docker image is built using Nix instead of Alpine
 
 [PR #155]: https://github.com/akvorado/akvorado/pull/155

console/graph.go

@@ -21,7 +21,7 @@ type graphHandlerInput struct {
 	End            time.Time     `json:"end" binding:"required,gtfield=Start"`
 	Points         uint          `json:"points" binding:"required,min=5,max=2000"` // minimum number of points
 	Dimensions     []queryColumn `json:"dimensions"`                               // group by ...
-	Limit          int           `json:"limit" binding:"min=1,max=50"`             // limit product of dimensions
+	Limit          int           `json:"limit" binding:"min=1"`                    // limit product of dimensions
 	Filter         queryFilter   `json:"filter"`                                   // where ...
 	Units          string        `json:"units" binding:"required,oneof=pps l2bps l3bps"`
 	Bidirectional  bool          `json:"bidirectional"`
@@ -211,6 +211,12 @@ func (c *Component) graphHandlerFunc(gc *gin.Context) {
 		gc.JSON(http.StatusBadRequest, gin.H{"message": helpers.Capitalize(err.Error())})
 		return
 	}
+	if input.Limit > c.config.DimensionsLimit {
+		gc.JSON(http.StatusBadRequest,
+			gin.H{"message": fmt.Sprintf("Limit is set beyond maximum value (%d)",
+				c.config.DimensionsLimit)})
+		return
+	}
 
 	sqlQuery := input.toSQL()
 	sqlQuery = c.finalizeQuery(sqlQuery)