(crawler) Fast detection and bail-out for crawler traps

Improve logging and exclude robots.txt from this logic.

build.gradle

@@ -47,7 +47,7 @@ ext {
     dockerImageBase='container-registry.oracle.com/graalvm/jdk:23'
     dockerImageTag='latest'
     dockerImageRegistry='marginalia'
-    jibVersion = '3.4.3'
+    jibVersion = '3.4.4'
 
 }
 

code/processes/crawling-process/java/nu/marginalia/crawl/fetcher/warc/WarcRecorder.java

@@ -22,6 +22,7 @@ import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.security.NoSuchAlgorithmException;
+import java.time.Duration;
 import java.time.Instant;
 import java.util.*;
 
@@ -89,6 +90,7 @@ public class WarcRecorder implements AutoCloseable {
 
         var call = client.newCall(request);
 
+
         cookieInformation.update(client, request.url());
 
         try (var response = call.execute();
@@ -167,6 +169,25 @@ public class WarcRecorder implements AutoCloseable {
             warcRequest.http(); // force HTTP header to be parsed before body is consumed so that caller can use it
             writer.write(warcRequest);
 
+            if (Duration.between(date, Instant.now()).compareTo(Duration.ofSeconds(9)) > 0
+                    && inputBuffer.size() < 2048
+                    && !request.url().encodedPath().endsWith("robots.txt")) // don't bail on robots.txt
+            {
+                // Fast detection and mitigation of crawler traps that respond with slow
+                // small responses, with a high branching factor
+
+                // Note we bail *after* writing the warc records, this will effectively only
+                // prevent link extraction from the document.
+
+                logger.warn("URL {} took too long to fetch ({}s) and was too small for the effort ({}b)",
+                        requestUri,
+                        Duration.between(date, Instant.now()).getSeconds(),
+                        inputBuffer.size()
+                );
+
+                return new HttpFetchResult.ResultException(new IOException("Likely crawler trap"));
+            }
+
             return new HttpFetchResult.ResultOk(responseUri,
                     response.code(),
                     inputBuffer.headers(),

run/install/barebones-1/docker-compose.yml.template

@@ -72,11 +72,11 @@ services:
     image: "mariadb:lts"
     container_name: "mariadb"
     env_file: "${INSTALL_DIR}/env/mariadb.env"
-    command: ['mysqld', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
+    command: ['mariadbd', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
     ports:
       - "127.0.0.1:3306:3306/tcp"
     healthcheck:
-      test: mysqladmin ping -h 127.0.0.1 -u ${uval} --password=${pval}
+      test: mariadb-admin ping -h 127.0.0.1 -u ${uval} --password=${pval}
       start_period: 5s
       interval: 5s
       timeout: 5s

run/install/barebones-2/docker-compose.yml.template

@@ -103,11 +103,11 @@ services:
     image: "mariadb:lts"
     container_name: "mariadb"
     env_file: "${INSTALL_DIR}/env/mariadb.env"
-    command: ['mysqld', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
+    command: ['mariadbd', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
     ports:
       - "127.0.0.1:3306:3306/tcp"
     healthcheck:
-      test: mysqladmin ping -h 127.0.0.1 -u ${uval} --password=${pval}
+      test: mariadb-admin ping -h 127.0.0.1 -u ${uval} --password=${pval}
       start_period: 5s
       interval: 5s
       timeout: 5s

run/install/marginalia-prod-like/docker-compose.yml.template

@@ -129,11 +129,11 @@ services:
     image: "mariadb:lts"
     container_name: "mariadb"
     env_file: "${INSTALL_DIR}/env/mariadb.env"
-    command: ['mysqld', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
+    command: ['mariadbd', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
     ports:
       - "127.0.0.1:3306:3306/tcp"
     healthcheck:
-      test: mysqladmin ping -h 127.0.0.1 -u ${uval} --password=${pval}
+      test: mariadb-admin ping -h 127.0.0.1 -u ${uval} --password=${pval}
       start_period: 5s
       interval: 5s
       timeout: 5s

run/install/no-docker/docker-compose.yml.template

@@ -3,11 +3,11 @@ services:
     image: "mariadb:lts"
     container_name: "mariadb"
     env_file: "${INSTALL_DIR}/env/mariadb.env"
-    command: ['mysqld', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
+    command: ['mariadbd', '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci']
     ports:
       - "127.0.0.1:3306:3306/tcp"
     healthcheck:
-      test: mysqladmin ping -h 127.0.0.1 -u ${uval} --password=${pval}
+      test: mariadb-admin ping -h 127.0.0.1 -u ${uval} --password=${pval}
       start_period: 5s
       interval: 5s
       timeout: 5s