Name log fields, metrics and the Core Rule Set package for what they are (closes #192)

Log field, metric, action and event names now say what they count
and, for timings, the unit. Package internal/waf is internal/coreruleset.

Model: opus-5-5

internal/discriminator/biased_test.go

@@ -79,14 +79,16 @@ func TestEachBiasedThresholdLowersTheRateLimits(t *testing.T) {
 				{http.StatusForbidden, requestlog.ActionClientIsRateLimited},
 			} {
 				line := s.get(tc.from, sent.status, sent.action)
-				wantPercent(t, "limit_percent", line.LimitPercent, line.LimitPercentSetting,
+				wantPercent(t, "rate_limit_percent",
+					line.RateLimitPercent, line.RateLimitPercentSetting,
 					"50 from "+tc.setting)
 			}
 
 			// fromKP, which no setting lists, has the whole limit.
 			for range 3 {
 				line := s.get(fromKP, http.StatusOK, requestlog.ActionForward)
-				wantPercent(t, "limit_percent", line.LimitPercent, line.LimitPercentSetting,
+				wantPercent(t, "rate_limit_percent",
+					line.RateLimitPercent, line.RateLimitPercentSetting,
 					none)
 			}
 		})
@@ -119,7 +121,8 @@ func TestEachBiasedThresholdLowersTheByteLimits(t *testing.T) {
 				t.Errorf("log line has limit_hit %q, want %s", line.LimitHit, minuteBytes)
 			}
 
-			wantPercent(t, "bytes_percent", line.BytesPercent, line.BytesPercentSetting,
+			wantPercent(t, "bytes_limit_percent",
+				line.BytesLimitPercent, line.BytesLimitPercentSetting,
 				"50 from "+tc.setting)
 
 			// fromKP, which no setting lists, has the whole limit.
@@ -128,7 +131,8 @@ func TestEachBiasedThresholdLowersTheByteLimits(t *testing.T) {
 				t.Errorf("log line for %s has limit_hit %q, want none", fromKP, line.LimitHit)
 			}
 
-			wantPercent(t, "bytes_percent", line.BytesPercent, line.BytesPercentSetting, none)
+			wantPercent(t, "bytes_limit_percent",
+				line.BytesLimitPercent, line.BytesLimitPercentSetting, none)
 		})
 	}
 }
@@ -177,9 +181,11 @@ func TestBytesPercentSettingsTakeThePlaceOfTheOthersForByteLimits(t *testing.T)
 				t.Errorf("log line has limit_hit %q, want %q", line.LimitHit, tc.limitHit)
 			}
 
-			wantPercent(t, "limit_percent", line.LimitPercent, line.LimitPercentSetting,
+			wantPercent(t, "rate_limit_percent",
+				line.RateLimitPercent, line.RateLimitPercentSetting,
 				tc.limitPercent)
-			wantPercent(t, "bytes_percent", line.BytesPercent, line.BytesPercentSetting,
+			wantPercent(t, "bytes_limit_percent",
+				line.BytesLimitPercent, line.BytesLimitPercentSetting,
 				tc.bytesPercent)
 		})
 	}
@@ -193,10 +199,10 @@ func TestZeroPercentIsAZeroAllowance(t *testing.T) {
 	// The first request breaks the limit, and bans the client; the log line
 	// gives the 0.
 	line := s.get(unplaced, http.StatusForbidden, requestlog.ActionClientIsRateLimited)
-	if line.fields["limit_percent"] != float64(0) ||
-		line.fields["limit_percent_setting"] != unknownLimitPercent {
-		t.Errorf("log line has limit_percent %v from %v, want 0 from %s",
-			line.fields["limit_percent"], line.fields["limit_percent_setting"],
+	if line.fields["rate_limit_percent"] != float64(0) ||
+		line.fields["rate_limit_percent_setting"] != unknownLimitPercent {
+		t.Errorf("log line has rate_limit_percent %v from %v, want 0 from %s",
+			line.fields["rate_limit_percent"], line.fields["rate_limit_percent_setting"],
 			unknownLimitPercent)
 	}
 
@@ -210,7 +216,7 @@ func TestLowestPercentageApplies(t *testing.T) {
 		name string
 		env  map[string]string
 		from string
-		// want is the log line's limit_percent, as percentText gives it.
+		// want is the log line's rate_limit_percent, as percentText gives it.
 		want string
 	}{
 		{
@@ -251,7 +257,8 @@ func TestLowestPercentageApplies(t *testing.T) {
 			s.get(tc.from, http.StatusOK, requestlog.ActionForward)
 
 			line := s.get(tc.from, http.StatusForbidden, requestlog.ActionClientIsRateLimited)
-			wantPercent(t, "limit_percent", line.LimitPercent, line.LimitPercentSetting,
+			wantPercent(t, "rate_limit_percent",
+				line.RateLimitPercent, line.RateLimitPercentSetting,
 				tc.want)
 		})
 	}
@@ -294,7 +301,8 @@ func TestClientWithoutAnAnswerInTimeHasTheUnknownLimitPercent(t *testing.T) {
 
 		line := out.requestLine(t)
 		wantLine(t, line, http.StatusForbidden, requestlog.ActionClientIsRateLimited)
-		wantPercent(t, "limit_percent", line.LimitPercent, line.LimitPercentSetting,
+		wantPercent(t, "rate_limit_percent",
+			line.RateLimitPercent, line.RateLimitPercentSetting,
 			"0 from "+unknownLimitPercent)
 	})
 }