Initial commit for Google Spreadsheet import/export extension

git-svn-id: http://google-refine.googlecode.com/svn/trunk@1501 7d457c2a-affb-35e4-300a-418c747d4874

extensions/gdata-extension/.classpath

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry combineaccessrules="false" kind="src" path="/grefine"/>
+	<classpathentry kind="lib" path="module/MOD-INF/lib/gdata-core-1.0.jar"/>
+	<classpathentry kind="lib" path="module/MOD-INF/lib/gdata-spreadsheet-3.0.jar"/>
+	<classpathentry kind="lib" path="module/MOD-INF/lib/google-collect-1.0-rc1.jar"/>
+	<classpathentry kind="output" path="module/MOD-INF/classes"/>
+</classpath>

extensions/gdata-extension/.project

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>grefine-gdata-extension</name>
+	<comment></comment>
+	<projects>
+		<project>gridworks</project>
+		<project>gridworks-server</project>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

extensions/gdata-extension/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,280 @@
+#Mon Sep 27 22:57:50 GMT 2010
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+org.eclipse.jdt.core.formatter.insert_space_between_brackets_in_array_type_reference=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_braces_in_array_initializer=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_brackets_in_array_allocation_expression=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_annotation_type_member_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_enum_constant=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_declaration=do not insert
+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_invocation=do not insert
+org.eclipse.jdt.core.formatter.join_lines_in_comments=true
+org.eclipse.jdt.core.formatter.join_wrapped_lines=true
+org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.lineSplit=80
+org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.never_indent_line_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body=0
+org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve=1
+org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line=true
+org.eclipse.jdt.core.formatter.tabulation.char=space
+org.eclipse.jdt.core.formatter.tabulation.size=4
+org.eclipse.jdt.core.formatter.use_on_off_tags=false
+org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations=false
+org.eclipse.jdt.core.formatter.wrap_before_binary_operator=true
+org.eclipse.jdt.core.formatter.wrap_outer_expressions_when_nested=true

extensions/gdata-extension/LICENSE.txt

@@ -0,0 +1,75 @@
+Copyright 2010 Thomas F. Morris
+
+Licensed under the terms of the Eclipse Public License v1.0
+http://www.eclipse.org/legal/epl-v10.html
+
+Eclipse Public License - v 1.0
+
+THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
+
+1. DEFINITIONS
+
+"Contribution" means:
+
+a) in the case of the initial Contributor, the initial code and documentation distributed under this Agreement, and
+b) in the case of each subsequent Contributor:
+i) changes to the Program, and
+ii) additions to the Program;
+where such changes and/or additions to the Program originate from and are distributed by that particular Contributor. A Contribution 'originates' from a Contributor if it was added to the Program by such Contributor itself or anyone acting on such Contributor's behalf. Contributions do not include additions to the Program which: (i) are separate modules of software distributed in conjunction with the Program under their own license agreement, and (ii) are not derivative works of the Program.
+"Contributor" means any person or entity that distributes the Program.
+
+"Licensed Patents" mean patent claims licensable by a Contributor which are necessarily infringed by the use or sale of its Contribution alone or when combined with the Program.
+
+"Program" means the Contributions distributed in accordance with this Agreement.
+
+"Recipient" means anyone who receives the Program under this Agreement, including all Contributors.
+
+2. GRANT OF RIGHTS
+
+a) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, distribute and sublicense the Contribution of such Contributor, if any, and such derivative works, in source code and object code form.
+b) Subject to the terms of this Agreement, each Contributor hereby grants Recipient a non-exclusive, worldwide, royalty-free patent license under Licensed Patents to make, use, sell, offer to sell, import and otherwise transfer the Contribution of such Contributor, if any, in source code and object code form. This patent license shall apply to the combination of the Contribution and the Program if, at the time the Contribution is added by the Contributor, such addition of the Contribution causes such combination to be covered by the Licensed Patents. The patent license shall not apply to any other combinations which include the Contribution. No hardware per se is licensed hereunder.
+c) Recipient understands that although each Contributor grants the licenses to its Contributions set forth herein, no assurances are provided by any Contributor that the Program does not infringe the patent or other intellectual property rights of any other entity. Each Contributor disclaims any liability to Recipient for claims brought by any other entity based on infringement of intellectual property rights or otherwise. As a condition to exercising the rights and licenses granted hereunder, each Recipient hereby assumes sole responsibility to secure any other intellectual property rights needed, if any. For example, if a third party patent license is required to allow Recipient to distribute the Program, it is Recipient's responsibility to acquire that license before distributing the Program.
+d) Each Contributor represents that to its knowledge it has sufficient copyright rights in its Contribution, if any, to grant the copyright license set forth in this Agreement.
+3. REQUIREMENTS
+
+A Contributor may choose to distribute the Program in object code form under its own license agreement, provided that:
+
+a) it complies with the terms and conditions of this Agreement; and
+b) its license agreement:
+i) effectively disclaims on behalf of all Contributors all warranties and conditions, express and implied, including warranties or conditions of title and non-infringement, and implied warranties or conditions of merchantability and fitness for a particular purpose;
+ii) effectively excludes on behalf of all Contributors all liability for damages, including direct, indirect, special, incidental and consequential damages, such as lost profits;
+iii) states that any provisions which differ from this Agreement are offered by that Contributor alone and not by any other party; and
+iv) states that source code for the Program is available from such Contributor, and informs licensees how to obtain it in a reasonable manner on or through a medium customarily used for software exchange.
+When the Program is made available in source code form:
+
+a) it must be made available under this Agreement; and
+b) a copy of this Agreement must be included with each copy of the Program.
+Contributors may not remove or alter any copyright notices contained within the Program.
+
+Each Contributor must identify itself as the originator of its Contribution, if any, in a manner that reasonably allows subsequent Recipients to identify the originator of the Contribution.
+
+4. COMMERCIAL DISTRIBUTION
+
+Commercial distributors of software may accept certain responsibilities with respect to end users, business partners and the like. While this license is intended to facilitate the commercial use of the Program, the Contributor who includes the Program in a commercial product offering should do so in a manner which does not create potential liability for other Contributors. Therefore, if a Contributor includes the Program in a commercial product offering, such Contributor ("Commercial Contributor") hereby agrees to defend and indemnify every other Contributor ("Indemnified Contributor") against any losses, damages and costs (collectively "Losses") arising from claims, lawsuits and other legal actions brought by a third party against the Indemnified Contributor to the extent caused by the acts or omissions of such Commercial Contributor in connection with its distribution of the Program in a commercial product offering. The obligations in this section do not apply to any claims or Losses relating to any actual or alleged intellectual property infringement. In order to qualify, an Indemnified Contributor must: a) promptly notify the Commercial Contributor in writing of such claim, and b) allow the Commercial Contributor to control, and cooperate with the Commercial Contributor in, the defense and any related settlement negotiations. The Indemnified Contributor may participate in any such claim at its own expense.
+
+For example, a Contributor might include the Program in a commercial product offering, Product X. That Contributor is then a Commercial Contributor. If that Commercial Contributor then makes performance claims, or offers warranties related to Product X, those performance claims and warranties are such Commercial Contributor's responsibility alone. Under this section, the Commercial Contributor would have to defend claims against the other Contributors related to those performance claims and warranties, and if a court requires any other Contributor to pay any damages as a result, the Commercial Contributor must pay those damages.
+
+5. NO WARRANTY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is solely responsible for determining the appropriateness of using and distributing the Program and assumes all risks associated with its exercise of rights under this Agreement , including but not limited to the risks and costs of program errors, compliance with applicable laws, damage to or loss of data, programs or equipment, and unavailability or interruption of operations.
+
+6. DISCLAIMER OF LIABILITY
+
+EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+7. GENERAL
+
+If any provision of this Agreement is invalid or unenforceable under applicable law, it shall not affect the validity or enforceability of the remainder of the terms of this Agreement, and without further action by the parties hereto, such provision shall be reformed to the minimum extent necessary to make such provision valid and enforceable.
+
+If Recipient institutes patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Program itself (excluding combinations of the Program with other software or hardware) infringes such Recipient's patent(s), then such Recipient's rights granted under Section 2(b) shall terminate as of the date such litigation is filed.
+
+All Recipient's rights under this Agreement shall terminate if it fails to comply with any of the material terms or conditions of this Agreement and does not cure such failure in a reasonable period of time after becoming aware of such noncompliance. If all Recipient's rights under this Agreement terminate, Recipient agrees to cease use and distribution of the Program as soon as reasonably practicable. However, Recipient's obligations under this Agreement and any licenses granted by Recipient relating to the Program shall continue and survive.
+
+Everyone is permitted to copy and distribute copies of this Agreement, but in order to avoid inconsistency the Agreement is copyrighted and may only be modified in the following manner. The Agreement Steward reserves the right to publish new versions (including revisions) of this Agreement from time to time. No one other than the Agreement Steward has the right to modify this Agreement. The Eclipse Foundation is the initial Agreement Steward. The Eclipse Foundation may assign the responsibility to serve as the Agreement Steward to a suitable separate entity. Each new version of the Agreement will be given a distinguishing version number. The Program (including Contributions) may always be distributed subject to the version of the Agreement under which it was received. In addition, after a new version of the Agreement is published, Contributor may elect to distribute the Program (including its Contributions) under the new version. Except as expressly stated in Sections 2(a) and 2(b) above, Recipient receives no rights or licenses to the intellectual property of any Contributor under this Agreement, whether expressly, by implication, estoppel or otherwise. All rights in the Program not expressly granted under this Agreement are reserved.
+
+This Agreement is governed by the laws of the State of New York and the intellectual property laws of the United States of America. No party to this Agreement will bring a legal action under this Agreement more than one year after the cause of action arose. Each party waives its rights to a jury trial in any resulting litigation.

extensions/gdata-extension/README.txt

@@ -0,0 +1,23 @@
+Gridworks extension for Google Spreadsheets
+by Tom Morris <tfmorris@gmail.com>
+
+This extension provides Gridworks with the ability to read Google spreadsheets
+directly so you don't have to export them as CSV files first.
+
+Unpack the contents of this archive (jar, zip, etc) into the extensions folder
+of your Gridworks installation and restart Gridworks.
+
+Enter the *public* share URL of a Google Spreadsheet in the "Data File URL"
+field of the "Create a New Project" pane of the Gridworks home page.
+
+If you end up with a project full of HTML tags and an RSS feed, the extension
+isn't installed properly.  A properly installed extension should have an About
+page available at http://127.0.0.1:3333/extension/gdata-extension/ (the trailing
+slash is significant).
+
+
+Known limitations:
+
+- No write support
+- No authentication support.  You must use the public share URL for the
+  the Google spreadsheet you want to load.

extensions/gdata-extension/build.xml

@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--+
+    |
+    |  Google Refine GData Extension Build File    
+    |                
+    +-->
+    
+<project name="grefine-gdata-extension" default="build" basedir=".">
+
+    <tstamp/>
+    <property name="name" value="gdata-extension"/>
+    <property name="version" value="0.1"/>
+    <property name="revision" value="${DSTAMP}${TSTAMP}"/>
+    <property name="dist.dir" value="dist"/>
+    <property name="ext.dir" value="${dist.dir}/${name}"/>
+    <property name="fullname" value="${name}-${version}-${revision}" />
+    
+    <property name="refine.dir" value="${basedir}/../grefine" />
+    <!-- We assume that we're a parallel project in an Eclipse workspace.
+         If you're using the SVN layout instead, you want something like:
+    <property name="refine.dir" value="${basedir}/../grefine-all/main" />
+    <property name="server.lib.dir" value="${basedir}/../grefine-all/server/lib" />
+    -->
+    <property name="server.lib.dir" value="${basedir}/../grefine-server/lib" />
+
+    <property name="refine.webinf.dir" value="${refine.dir}/webapp/WEB-INF" />
+    <property name="refine.modinf.dir" value="${refine.dir}/webapp/modules/core/MOD-INF" />
+    <property name="refine.classes.dir" value="${refine.webinf.dir}/classes" />
+    <property name="refine.lib.dir" value="${refine.webinf.dir}/lib" />
+    
+    <property name="src.dir" value="${basedir}/src" />
+    <property name="module.dir" value="${basedir}/module" />
+    <property name="modinf.dir" value="${module.dir}/MOD-INF" />
+    <property name="lib.dir" value="${modinf.dir}/lib" />
+    <property name="classes.dir" value="${modinf.dir}/classes" />
+
+    <path id="class.path">
+        <fileset dir="${lib.dir}">
+            <include name="**/*.jar" />
+        </fileset>
+        <fileset dir="${refine.lib.dir}">
+            <include name="**/*.jar" />
+        </fileset>
+        <fileset dir="${server.lib.dir}">
+            <include name="**/*.jar" />
+        </fileset>
+        <pathelement path="${refine.classes.dir}"/>
+    </path>
+            
+    <target name="build_java">
+        <mkdir dir="${classes.dir}" />
+        <javac destdir="${classes.dir}" debug="true" includeAntRuntime="no">
+            <src path="${src.dir}"/>
+            <classpath refid="class.path" />
+        </javac>
+    </target>
+
+    <target name="build" depends="build_java"/>
+
+    <target name="dist" depends="build">
+        <mkdir dir="${ext.dir}"/>
+     
+         <copy todir="${ext.dir}/module">
+             <fileset dir="module">
+                 <include name="**/*.*"/>
+             </fileset>
+         </copy>
+
+         <copy todir="${ext.dir}/licenses">
+             <fileset dir="${basedir}/licenses">
+                 <include name="**"/>
+             </fileset>
+         </copy>
+         <copy file="${basedir}/LICENSE.txt" tofile="${ext.dir}/LICENSE.txt"/>
+         <copy file="${basedir}/README.txt" tofile="${ext.dir}/README.txt"/>
+         
+         <zip destfile="${dist.dir}/google-refine-${fullname}.zip">
+            <zipfileset dir="${ext.dir}/..">
+                <include name="**/**"/>
+            </zipfileset>
+         </zip>
+    	
+    	<delete dir="${ext.dir}"/>
+    </target>
+
+    <target name="clean">
+        <delete dir="${classes.dir}" />
+    </target>
+
+    <target name="distclean">
+        <delete dir="${dist.dir}" />
+    </target>
+</project>

extensions/gdata-extension/licenses/gdata-java-client.LICENSE.txt

@@ -0,0 +1,188 @@
+Copyright 2006 Google
+
+   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
+
+       http://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.
+   
+                               Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
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+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
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+      on behalf of whom a Contribution has been received by Licensor and
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+
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+
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+
+      You may add Your own copyright statement to Your modifications and
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+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.

extensions/gdata-extension/module/MOD-INF/controller.js

@@ -0,0 +1,63 @@
+var html = "text/html";
+var encoding = "UTF-8";
+var version="0.2"
+var ClientSideResourceManager = Packages.com.google.refine.ClientSideResourceManager;
+
+/*
+ * Function invoked to initialize the extension.
+ */
+function init() {
+//    Packages.java.lang.System.err.println("Initializing gData extension");
+//    Packages.java.lang.System.err.println(module.getMountPoint());
+
+	Packages.com.google.refine.RefineServlet.registerCommand(
+        module, "authorize", Packages.com.google.refine.extension.gdata.AuthorizeCommand());
+	Packages.com.google.refine.RefineServlet.registerCommand(
+	        module, "authorize2", Packages.com.google.refine.extension.gdata.AuthorizeCommand2());
+	Packages.com.google.refine.RefineServlet.registerCommand(
+        module, "deauthorize", Packages.com.google.refine.extension.gdata.DeAuthorizeCommand());
+
+    // Register importer and exporter
+    Packages.com.google.refine.importers.ImporterRegistry.registerImporter(
+    	      "gdata-importer", new Packages.com.google.refine.extension.gdata.GDataImporter());
+
+    Packages.com.google.refine.exporters.ExporterRegistry.registerExporter(
+  	      "gdata-exporter", new Packages.com.google.refine.extension.gdata.GDataExporter());
+
+    // Script files to inject into /project page
+    ClientSideResourceManager.addPaths(
+        "project/scripts",
+        module,
+        [
+            "scripts/project-injection.js"
+        ]
+    );
+    
+    // Style files to inject into /project page
+    ClientSideResourceManager.addPaths(
+        "project/styles",
+        module,
+        [
+            "styles/project-injection.less"
+        ]
+    );    
+    
+}
+
+/*
+ * Function invoked to handle each request in a custom way.
+ */
+function process(path, request, response) {
+    // Analyze path and handle this request yourself.
+	
+    if (path == "/" || path == "") {
+        var context = {};
+        // here's how to pass things into the .vt templates
+        context.version = version;
+        send(request, response, "index.vt", context);
+    }
+}
+
+function send(request, response, template, context) {
+    butterfly.sendTextFromTemplate(request, response, context, template, encoding, html);
+}

extensions/gdata-extension/module/MOD-INF/module.properties

@@ -0,0 +1,4 @@
+name = gdata-extension
+description = Google Data (gData) importer/exporter for Google Refine
+templating.macros = macros.vm
+requires = core

extensions/gdata-extension/module/index.vt

@@ -0,0 +1,22 @@
+#*
+ * Access this page at the URL /extension/gdata-extension/
+ *#
+<html>
+  <head>
+    <title>Google Data (gData) Extension v$version</title>
+  </head>
+  <body>
+    <h1>Google Data Extension v$version</h1>
+    <h2>by Tom Morris <tfmorris@gmail.com></h2>    
+    <p>The Google Spreadsheet/Google Data extension allows Google Refine to read
+    (and write, soon) Google Spreadsheets.  It should be easily adaptable to
+    other data sources which implement the gData protocol such as Google Base.
+    </p>
+    <h3>Known Limitations</h3>
+    <ul>
+    	<li>No write support</li>
+	<li>No authentication support.  You must use the public share URL for the
+  the Google spreadsheet you want to load.</li>
+    </ul>
+  </body>
+</html>

extensions/gdata-extension/module/macros.vm

@@ -0,0 +1,14 @@
+#*
+  This file contains common velocity macros used in all .vt files.
+  For Velocity documentation, see:
+  
+  http://velocity.apache.org/engine/releases/velocity-1.5/user-guide.html
+*#
+
+#macro( makeAList $list )
+  <ul>
+    #foreach($item in $list)
+      <li>$item</li>
+    #end
+  </ul>
+#end

extensions/gdata-extension/module/scripts/project-injection.js

@@ -0,0 +1,19 @@
+// Client side resources to be injected for gData extension
+
+// Add items to the exporter menu
+MenuBar.insertBefore(
+        [ "core/project", "core/export", "core/export-templating" ],
+        [
+            {
+                "label":"Google Spreadsheet",
+                "click": function() {}
+            },
+            {
+                "label":"Google Data",
+                "click": function() {}
+            },
+            {} // separator
+        ]
+);
+
+var gdataExtension = {};

extensions/gdata-extension/module/styles/project-injection.less

@@ -0,0 +1,5 @@
+// LESS styles
+// For documentation, see http://lesscss.org/
+
+@color: blue;
+

extensions/gdata-extension/src/com/google/refine/extension/gdata/AuthorizeCommand.java

@@ -0,0 +1,28 @@
+package com.google.refine.extension.gdata;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.google.gdata.client.http.AuthSubUtil;
+import com.google.refine.commands.Command;
+
+/**
+ * Command to allow user to authenticate themselves.
+ * 
+ */
+public class AuthorizeCommand extends Command {
+
+    public void doGet(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+
+        String requestUrl = AuthSubUtil.getRequestUrl(request.getRequestURL()
+                + "2", // execution continues at authorize2 on redirect
+                // Scope must be http, not https
+                "http://spreadsheets.google.com/feeds", false, true);
+        response.sendRedirect(requestUrl);
+    }
+
+}

extensions/gdata-extension/src/com/google/refine/extension/gdata/AuthorizeCommand2.java

@@ -0,0 +1,58 @@
+package com.google.refine.extension.gdata;
+
+import java.io.IOException;
+import java.net.URLDecoder;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.google.gdata.client.http.AuthSubUtil;
+import com.google.refine.commands.Command;
+
+/**
+ * Second half of authentication sequence after Google has redirected back to us
+ * 
+ */
+public class AuthorizeCommand2 extends Command {
+
+    public void doGet(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+
+        try {
+            String queryString = request.getQueryString();
+            if (queryString == null) {
+                respond(response, "401 Unauthorized", "Authentication failed.");
+                return;
+            }
+            String onetimeUseToken = AuthSubUtil.getTokenFromReply(URLDecoder
+                    .decode(queryString));
+            String sessionToken = AuthSubUtil.exchangeForSessionToken(
+                    onetimeUseToken, null);
+            TokenCookie.setToken(request, response, sessionToken);
+
+//            FeedURLFactory factory = FeedURLFactory.getDefault();
+//            SpreadsheetService service = new SpreadsheetService(
+//                    "Google-Refine-GData-Extension-0.2");
+//            service.setAuthSubToken(sessionToken);
+//
+//            SpreadsheetFeed feed = service.getFeed(
+//                    factory.getSpreadsheetsFeedUrl(), SpreadsheetFeed.class);
+//            List<SpreadsheetEntry> spreadsheets = feed.getEntries();
+//            for (int i = 0; i < spreadsheets.size(); i++) {
+//                SpreadsheetEntry entry = spreadsheets.get(i);
+//                System.out.println("\t" + entry.getTitle().getPlainText());
+//            }
+
+            respond(response, "200 OK", "");
+            // } catch (AuthenticationException e) {
+            // } catch (GeneralSecurityException e) {
+        } catch (Exception e) { // AuthenticationException
+                                // GeneralSecurityException
+            e.printStackTrace();
+            TokenCookie.deleteToken(request, response);
+            respondException(response, e);
+        }
+    }
+
+}

extensions/gdata-extension/src/com/google/refine/extension/gdata/DeAuthorizeCommand.java

@@ -0,0 +1,31 @@
+package com.google.refine.extension.gdata;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.google.gdata.client.http.AuthSubUtil;
+import com.google.refine.commands.Command;
+
+public class DeAuthorizeCommand extends Command {
+
+    public void doGet(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+
+        try {
+            response.setCharacterEncoding("UTF-8");
+            response.setHeader("Content-Type", "application/json");
+
+            String sessionToken = TokenCookie.getToken(request);
+            if (sessionToken != null) {
+                AuthSubUtil.revokeToken(sessionToken, null);
+                TokenCookie.deleteToken(request, response);
+            }
+            respond(response, "200 OK", "");
+        } catch (Exception e) {
+            respondException(response, e);
+        }
+    }
+}

extensions/gdata-extension/src/com/google/refine/extension/gdata/GDataImporter.java

@@ -0,0 +1,345 @@
+/*
+ * Copyright (c) 2010, Thomas F. Morris
+ *        All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright notice, this 
+ *   list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice, 
+ *   this list of conditions and the following disclaimer in the documentation 
+ *   and/or other materials provided with the distribution.
+ * 
+ * Neither the name of Google nor the names of its contributors may be used to 
+ * endorse or promote products derived from this software without specific 
+ * prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.google.refine.extension.gdata;
+
+import java.io.IOException;
+import java.io.Serializable;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+
+import com.google.gdata.client.spreadsheet.CellQuery;
+import com.google.gdata.client.spreadsheet.FeedURLFactory;
+import com.google.gdata.client.spreadsheet.SpreadsheetService;
+import com.google.gdata.data.spreadsheet.CellEntry;
+import com.google.gdata.data.spreadsheet.CellFeed;
+import com.google.gdata.data.spreadsheet.ListEntry;
+import com.google.gdata.data.spreadsheet.ListFeed;
+import com.google.gdata.data.spreadsheet.SpreadsheetEntry;
+import com.google.gdata.data.spreadsheet.SpreadsheetFeed;
+import com.google.gdata.data.spreadsheet.WorksheetEntry;
+import com.google.gdata.data.spreadsheet.WorksheetFeed;
+import com.google.gdata.util.InvalidEntryException;
+import com.google.gdata.util.ServiceException;
+import com.google.refine.ProjectMetadata;
+import com.google.refine.expr.ExpressionUtils;
+import com.google.refine.importers.ImporterUtilities;
+import com.google.refine.importers.UrlImporter;
+import com.google.refine.model.Cell;
+import com.google.refine.model.Column;
+import com.google.refine.model.Project;
+import com.google.refine.model.Row;
+
+/**
+ * Google Refine importer for Google Spreadsheets.
+ * 
+ * @author Tom Morris <tfmorris@gmail.com>
+ * @copyright 2010 Thomas F. Morris
+ * @license New BSD http://www.opensource.org/licenses/bsd-license.php
+ */
+public class GDataImporter implements UrlImporter {
+
+	static final String SERVICE_APP_NAME = "Google-Refine-GData-Extension";
+
+	private FeedURLFactory factory;
+
+    public GDataImporter() {
+        // Careful - this is done at server init time and is shared by everyone
+        factory = FeedURLFactory.getDefault();
+    }
+
+    @Override
+    public void read(URL url, Project project, ProjectMetadata metadata,
+            Properties options) throws Exception {
+        // Start fresh for each read so that we're not caching authorization or
+        // anything
+        SpreadsheetService service = new SpreadsheetService(
+                SERVICE_APP_NAME);
+
+        // String token = TokenCookie.getToken(request);
+        // if (token != null) {
+        // service.setAuthSubToken(token);
+        // }
+
+        int ignoreLines = ImporterUtilities.getIntegerOption("ignore", options, -1);
+        int headerLines = ImporterUtilities.getIntegerOption("header-lines", options, 1);
+        int limit = ImporterUtilities.getIntegerOption("limit", options, -1);
+
+        // Note: Unlike TSV/CSV importer, we count all rows towards skip, not
+        // just "data" rows
+        int skip = ImporterUtilities.getIntegerOption("skip", options, 0);
+        int dataStart = ignoreLines + headerLines + skip;
+        boolean guessValueType = ImporterUtilities.getBooleanOption(
+                "guess-value-type", options, true);
+
+        // TODO: Put this in a namespace?
+        metadata.setCustomMetadata("source-url", url.toExternalForm());
+
+        String spreadsheetKey = getKey(url);
+        WorksheetEntry worksheet;
+        try {
+            worksheet = getWorksheetEntries(service, spreadsheetKey).get(0);
+        } catch (InvalidEntryException e) {
+            throw new RuntimeException("Failed to open spreadsheet "
+                    + e.getResponseBody(), e);
+        }
+
+        // Create columns
+        List<String> columnHeaders = getColumnHeaders(service, worksheet,
+                ignoreLines, headerLines);
+
+        int columnCount = worksheet.getColCount();
+        project.columnModel.setMaxCellIndex(columnCount);
+        boolean validColumn[] = new boolean[columnCount];
+        int index = 0;
+        for (String name : columnHeaders) {
+            Column column = new Column(index, name + " " + index);
+            project.columnModel.columns.add(column);
+            validColumn[index++] = true;
+        }
+        for (int i = index; index < columnCount; index++) {
+            Column column = new Column(index, "Column " + index);
+            project.columnModel.columns.add(column);
+            validColumn[i] = true;
+        }
+
+        // Create data rows & cells
+        int previousRow = dataStart - 1;
+        int previousCol = -1;
+        List<CellEntry> cellEntries = getCells(service, worksheet, dataStart);
+        Row row = null;
+        for (CellEntry cellEntry : cellEntries) {
+            com.google.gdata.data.spreadsheet.Cell cell = cellEntry.getCell();
+            if (cell == null) {
+                continue;
+            }
+            int r = cell.getRow() - 1; // convert from 1-based to 0-based
+            int c = cell.getCol() - 1;
+
+            if (limit > 0 && r > limit) {
+                break;
+            }
+
+            // Handle gaps in rows
+            if (r > previousRow) {
+                // Finish and add current row
+                if (row != null) {
+                    project.rows.add(row);
+                    // project.columnModel.setMaxCellIndex(row.cells.size()); //
+                    // TODO: ???
+                }
+
+                // Add empty rows for skipped rows
+                while (previousRow < r - 1) {
+                    project.rows.add(new Row(columnCount));
+                    previousRow++;
+                }
+                row = new Row(columnCount);
+                previousRow = r;
+                previousCol = 0;
+            }
+
+            // Add blank cells for any that were skipped before the current one
+            for (int col = previousCol + 1; col < c; col++) {
+                row.cells.add(new Cell("", null));
+            }
+            previousCol = c;
+
+            String s = cell.getValue();
+            if (s != null) {
+                s = s.trim();
+            }
+            if (ExpressionUtils.isNonBlankData(s)) {
+                Serializable value = guessValueType ? ImporterUtilities
+                        .parseCellValue(s) : s;
+                row.cells.add(new Cell(value, null));
+            } else {
+                row.cells.add(null);
+            }
+        }
+        // Add last row
+        if (row != null) {
+            project.rows.add(row);
+        }
+    }
+
+    /**
+     * Retrieves the spreadsheets that an authenticated user has access to. Not
+     * valid for unauthenticated access.
+     * 
+     * @return a list of spreadsheet entries
+     * @throws Exception
+     *             if error in retrieving the spreadsheet information
+     */
+    public List<SpreadsheetEntry> getSpreadsheetEntries(
+            SpreadsheetService service) throws Exception {
+        SpreadsheetFeed feed = service.getFeed(
+                factory.getSpreadsheetsFeedUrl(), SpreadsheetFeed.class);
+        return feed.getEntries();
+    }
+
+    public List<WorksheetEntry> getWorksheetEntries(SpreadsheetService service,
+            String spreadsheetKey) throws MalformedURLException, IOException,
+            ServiceException {
+        WorksheetFeed feed = service
+                .getFeed(factory.getWorksheetFeedUrl(spreadsheetKey, "public",
+                        "values"), WorksheetFeed.class);
+        return feed.getEntries();
+    }
+
+    /**
+     * Retrieves the columns headers from the cell feed of the worksheet entry.
+     * 
+     * @param worksheet
+     *            worksheet entry containing the cell feed in question
+     * @return a list of column headers
+     * @throws Exception
+     *             if error in retrieving the spreadsheet information
+     */
+    public List<String> getColumnHeaders(SpreadsheetService service,
+            WorksheetEntry worksheet, int startRow, int rows) throws Exception {
+        List<String> headers = new ArrayList<String>();
+
+        // Get the appropriate URL for a cell feed
+        URL cellFeedUrl = worksheet.getCellFeedUrl();
+
+        // Create a query for the cells in the header row(s) (1-based)
+        CellQuery cellQuery = new CellQuery(cellFeedUrl);
+        if (startRow > 0) {
+            cellQuery.setMinimumRow(startRow + 1);
+        }
+        cellQuery.setMaximumRow(startRow + rows);
+
+        // Get the cell feed matching the query
+        CellFeed topRowCellFeed = service.query(cellQuery, CellFeed.class);
+
+        // Get the cell entries from the feed
+        List<CellEntry> cellEntries = topRowCellFeed.getEntries();
+        for (CellEntry entry : cellEntries) {
+
+            // Get the cell element from the entry
+            com.google.gdata.data.spreadsheet.Cell cell = entry.getCell();
+            int r = cell.getRow() - 1;
+            if (cell != null) {
+                if (r == startRow) {
+                    headers.add(cell.getValue().trim());
+                } else if (r < startRow + rows) {
+                    headers.set(r, headers.get(r) + " "
+                            + cell.getValue().trim());
+                }
+            }
+        }
+
+        return headers;
+    }
+
+    public List<CellEntry> getCells(SpreadsheetService service,
+            WorksheetEntry worksheet, int startRow) throws IOException,
+            ServiceException {
+
+        URL cellFeedUrl = worksheet.getCellFeedUrl();
+
+        // Create a query skipping the desired number of rows
+        CellQuery cellQuery = new CellQuery(cellFeedUrl);
+        cellQuery.setMinimumRow(startRow + 1); // 1-based
+        int rows = worksheet.getRowCount();
+        cellQuery.setMaximumRow(rows);
+        // cellQuery.setMinimumCol(1);
+        int cols = worksheet.getColCount();
+        cellQuery.setMaximumCol(cols);
+        cellQuery.setMaxResults(rows * cols);
+        cellQuery.setReturnEmpty(false);
+
+        CellFeed cellFeed = service.query(cellQuery, CellFeed.class);
+        return cellFeed.getEntries();
+    }
+
+    List<ListEntry> getListEntries(SpreadsheetService service,
+            WorksheetEntry worksheet) throws IOException, ServiceException {
+        URL listFeedUrl = worksheet.getListFeedUrl();
+        ListFeed feed = service.getFeed(listFeedUrl, ListFeed.class);
+        return feed.getEntries();
+    }
+
+    @Override
+    public boolean canImportData(String contentType, String filename) {
+        return false;
+    }
+
+    @Override
+    public boolean canImportData(URL url) {
+        // http://spreadsheets.google.com/ccc?key=tI36b9Fxk1lFBS83iR_3XQA&hl=en
+        if (url.getHost().endsWith(".google.com")) {
+            return true;
+        } else {
+            return false;
+        }
+
+    }
+
+    // Modified version of FeedURLFactor.getSpreadsheetKeyFromUrl()
+    private String getKey(URL url) {
+        String query = url.getQuery();
+        if (query != null) {
+            String[] parts = query.split("&");
+
+            int offset = -1;
+            int numParts = 0;
+            String keyOrId = "";
+
+            for (String part : parts) {
+                if (part.startsWith("id=")) {
+                    offset = ("id=").length();
+                    keyOrId = part.substring(offset);
+                    numParts = 4;
+                    break;
+                } else if (part.startsWith("key=")) {
+                    offset = ("key=").length();
+                    keyOrId = part.substring(offset);
+                    if (keyOrId.startsWith("p") || !keyOrId.contains(".")) {
+                        return keyOrId;
+                    }
+                    numParts = 2;
+                    break;
+                }
+            }
+
+            if (offset > -1) {
+                String[] dottedParts = keyOrId.split("\\.");
+                if (dottedParts.length == numParts) {
+                    return dottedParts[0] + "." + dottedParts[1];
+                }
+            }
+        }
+        return null;
+    }
+
+}

extensions/gdata-extension/src/com/google/refine/extension/gdata/TokenCookie.java

@@ -0,0 +1,29 @@
+package com.google.refine.extension.gdata;
+
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.google.refine.util.CookiesUtilities;
+
+public class TokenCookie {
+
+    private static final String COOKIE_NAME = "authsub_token";
+    private static int MAX_AGE = 30 * 24 * 60 * 60; // 30 days
+
+    public static String getToken(HttpServletRequest request) {
+        Cookie cookie = CookiesUtilities.getCookie(request, COOKIE_NAME);
+        return (cookie == null) ? null : cookie.getValue();
+    }
+
+    public static void setToken(HttpServletRequest request,
+            HttpServletResponse response, String token) {
+        CookiesUtilities.setCookie(request, response, COOKIE_NAME, token, MAX_AGE);
+    }
+
+    public static void deleteToken(HttpServletRequest request,
+            HttpServletResponse response) {
+        CookiesUtilities.deleteCookie(request, response, COOKIE_NAME);
+    }
+
+}