Fixes #1372: apoc.load.html ability to read runtime structure of the …

…page (#1989) Co-authored-by: Giuseppe Villani <giuseppe.villani@larus-ba.it>
neo4j-contrib · Jun 15, 2021 · 1e6135a · 1e6135a
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diff --git a/docs/asciidoc/modules/ROOT/partials/usage/apoc.load.html.adoc b/docs/asciidoc/modules/ROOT/partials/usage/apoc.load.html.adoc
@@ -224,4 +224,66 @@ a|
   ]
 }
 ----
-|===
+|===
+
+If we have a `.html` file with a jQuery script like:
+
+[source,html]
+----
+<!DOCTYPE html>
+<head>
+    <script type="text/javascript">
+    $(() => {
+        var newP = document.createElement("strong");
+        var textNode = document.createTextNode("This is a new text node");
+        newP.appendChild(textNode);
+        document.getElementById("appendStuff").appendChild(newP);
+    });
+    </script>
+    <meta charset="UTF-8"/>
+</head>
+<body onLoad="loadData()" class="mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject page-Aap_Kaa_Hak rootpage-Aap_Kaa_Hak skin-vector action-view">
+	<div id="appendStuff"></div>
+</body>
+</html>
+----
+
+we can read the generated js through the `browser` config.
+Note that to use a browser, you have to install <<selenium-depencencies,this dependencies>>:
+
+[source,cypher]
+----
+CALL apoc.load.html("test.html",{strong: "strong"}, {browser: "FIREFOX"});
+----
+.Results
+[opts="header"]
+|===
+| Output
+a|
+[source,json]
+----
+{
+  "strong": [
+    {
+      "tagName": "strong",
+      "text": "This is a new text node"
+    }
+  ]
+}
+----
+|===
+
+If we can parse a tag from a slow async call, we can use `wait` config to waiting for 10 second (in this example):
+
+[source,cypher]
+----
+CALL apoc.load.html("test.html",{asyncTag: "#asyncTag"}, {browser: "FIREFOX", wait: 10});
+----
+
+[[selenium-depencencies]]
+== Dependencies
+
+To use the `apoc.load.html` proceduree with `browser` config (not `NONE`), you have to add additional dependencies.
+
+This dependency is included in https://github.com/neo4j-contrib/neo4j-apoc-procedures/releases/download/{apoc-release}/apoc-selenium-dependencies-{apoc-release}.jar[apoc-selenium-dependencies-{apoc-release}.jar^], which can be downloaded from the https://github.com/neo4j-contrib/neo4j-apoc-procedures/releases/tag/{apoc-release}[releases page^].
+Once that file is downloaded, it should be placed in the `plugins` directory and the Neo4j Server restarted.
diff --git a/docs/asciidoc/modules/ROOT/partials/usage/config/apoc.load.html.adoc b/docs/asciidoc/modules/ROOT/partials/usage/config/apoc.load.html.adoc
@@ -1,10 +1,19 @@
 The procedure support the following config parameters:
 
 .Config parameters
-[opts=header]
+[opts="header",cols="1m,2m,1m,4"]
 |===
 | name | type | default | description
-| charset | String | "UTF-8" | the character set of the page being scraped
+| browser | Enum [NONE, CHROME, FIREFOX] | NONE | If it is set to "CHROME" or "FIREFOX", is used https://www.selenium.dev/documentation/en/webdriver/[Selenium Web Driver] to read the dynamically generated js.
+    In case it is "NONE" (default), it is not possible to read dynamic contents.
+    Note that to use the Chrome or Firefox driver, you need to have them installed on your machine and you have to download additional jars into the plugin folder. <<selenium-depencencies, See below>>
+| wait | long | 0 | If greater than 0, it waits until it finds at least one element for each of those entered in the query parameter
+    (up to a maximum of defined seconds, otherwise it continues execution).
+    Useful to handle elements which can be rendered after the page is loaded (i.e. slow asynchronous calls).
+| charset | String | "UTF-8" | the character set of the page being scraped, if `http-equiv` meta-tag is not set.
+| headless | boolean | true | Valid with `browser` not equal to `NONE`, allow to run browser in https://chromium.googlesource.com/chromium/src/+/lkgr/headless/README.md[headless mode], 
+    that is without actually opening the browser UI (recommended).
+| acceptInsecureCerts | boolean | true | If true, allow to read html from insecure certificates
 | baseUri | String | "" | Base URI used to resolve relative paths
 | failSilently | Enum [FALSE, WITH_LOG, WITH_LIST] | FALSE | If the parse fails with one or more elements, using `FALSE` it throws a `RuntimeException`, using `WITH_LOG` a `log.warn` is created for each incorrect item and using `WITH_LIST` an `errorList` key is added to the result with the failed tags.
 |===
diff --git a/extra-dependencies/selenium/build.gradle b/extra-dependencies/selenium/build.gradle
@@ -0,0 +1,22 @@
+plugins {
+    id 'com.github.johnrengelman.shadow' version '4.0.3'
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
+}
+
+archivesBaseName = 'apoc-selenium-dependencies'
+description = """APOC Selenium Dependencies"""
+
+jar {
+    manifest {
+        attributes 'Implementation-Version': version
+    }
+}
+
+dependencies {
+    compile group: 'org.seleniumhq.selenium', name: 'selenium-java', version: '3.141.59'
+    compile group: 'io.github.bonigarcia', name: 'webdrivermanager', version: '4.4.3'
+}
diff --git a/extra-dependencies/selenium/gradle/wrapper/gradle-wrapper.jar b/extra-dependencies/selenium/gradle/wrapper/gradle-wrapper.jar
diff --git a/extra-dependencies/selenium/gradle/wrapper/gradle-wrapper.properties b/extra-dependencies/selenium/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Tue Feb 06 14:27:44 CET 2018
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
diff --git a/extra-dependencies/selenium/gradlew b/extra-dependencies/selenium/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"