From a6727bcf73ef39493fc017503c8674cd02a56b89 Mon Sep 17 00:00:00 2001
From: Samuel Lampa <samuel.lampa@gmail.com>
Date: Thu, 17 Aug 2017 19:50:34 +0200
Subject: [PATCH] Fix default Content-type header for CONSTRUCT queries (Only
 RDF/XML so far)

---
 classes/RDFIO_SpecialPage.php      |  4 ++--
 specials/SpecialSPARQLEndpoint.php | 36 +++++++++++++++---------------
 2 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/classes/RDFIO_SpecialPage.php b/classes/RDFIO_SpecialPage.php
index d6d741f..a9a0e0c 100644
--- a/classes/RDFIO_SpecialPage.php
+++ b/classes/RDFIO_SpecialPage.php
@@ -42,9 +42,9 @@ private function setHeadersForOutputType( $outputType ) {
 
 		$contentTypeMap = array(
 			'sparqlresult' => 'application/sparql-results+xml',
-			'rdfxml'       => 'application/xml',
+			'rdfxml'       => 'application/rdf+xml',
 			'json'         => 'application/json',
-			'turtle'       => 'text/html',
+			'turtle'       => 'text/turtle',
 			'htmltab'      => '', // Not applicable
 			'tsv'          => 'text/html'
 		);
diff --git a/specials/SpecialSPARQLEndpoint.php b/specials/SpecialSPARQLEndpoint.php
index 6cf1375..6dda630 100644
--- a/specials/SpecialSPARQLEndpoint.php
+++ b/specials/SpecialSPARQLEndpoint.php
@@ -87,7 +87,7 @@ private function executeReadOnlyQuery( $options ) {
 		}
 
 		if ( $options->queryType == 'select' ) {
-			if ( $options->outputType == 'rdfxml' ) {
+			if ( in_array( $options->outputType, array( 'rdfxml' ) ) ) {
 				$this->errorMsg( wfMessage( 'rdfio-error-invalid-output-for-select' )->parse() );
 				$this->printHTMLForm( $options );
 				return;
@@ -108,26 +108,25 @@ private function executeReadOnlyQuery( $options ) {
 		}
 
 		if ( $options->queryType == 'construct' ) {
-			if ( $options->outputType == 'rdfxml' ) {
-				// Here the results should be RDF/XML triples,
-				// not just plain XML SPARQL result set
-				$tripleindex = $outputArr['result'];
-
-				$arc2 = new ARC2_Class( array(), $this );
-				$triples = $arc2->toTriples( $tripleindex );
+			if ( $options->outputType !== 'turtle' ) {
+				// Falling back on using RDF/XML as default
+				$options->outputType = 'rdfxml';
+			}
 
-				if ( $options->outputEquivUris ) {
-					$triples = $this->storewrapper->toEquivUrisInTriples( $triples );
-				}
+			// Here the results should be RDF/XML triples,
+			// not just plain XML SPARQL result set
+			$tripleindex = $outputArr['result'];
 
-				$this->prepareCreatingDownloadableFile( $options );
-				// Using echo instead of $wgOut->addHTML() here, since output format is not HTML
-				echo $this->triplesToRDFXML( $triples );
-				return;
+			$arc2 = new ARC2_Class( array(), $this );
+			$triples = $arc2->toTriples( $tripleindex );
 
+			if ( $options->outputEquivUris ) {
+				$triples = $this->storewrapper->toEquivUrisInTriples( $triples );
 			}
-			$this->errorMsg( wfMessage( 'rdfio-error-invalid-output-for-construct' )->parse() );
-			$this->printHTMLForm( $options );
+
+			$this->prepareCreatingDownloadableFile( $options );
+			// Using echo instead of $wgOut->addHTML() here, since output format is not HTML
+			echo $this->triplesToRDFXML( $triples );
 			return;
 		}
 	}
@@ -434,6 +433,7 @@ private function getHTMLForm( $query = '' ) {
 		$chkFilterVocab = $wRequest->getBool( 'filtervocab', false ) == 1 ? ' checked="true" ' : '';
 		$selOutputHTML = $wRequest->getText( 'output', '' ) == 'htmltab' ? ' selected="selected" ' : '';
 		$selOutputRDFXML = $wRequest->getText( 'output', '' ) == 'rdfxml' ? ' selected="selected" ' : '';
+		//$selOutputTurtle = $wRequest->getText( 'output', '' ) == 'turtle' ? ' selected="selected" ' : '';
 
 		// Make the HTML format selected by default
 		if ( $selOutputRDFXML == '' ) {
@@ -472,10 +472,10 @@ private function getHTMLForm( $query = '' ) {
 				  <!-- <option value="json" >JSON</option> -->
 				  <!-- <option value="plain" >Plain</option> -->
 				  <!-- <option value="php_ser" >Serialized PHP</option> -->
-				  <!-- <option value="turtle" >Turtle</option> -->
 				  <option value="htmltab" ' . $selOutputHTML . '>HTML</option>
 				  <option value="sparqlresult" >SPARQL Resultset (XML)</option>
 				  <option value="rdfxml" ' . $selOutputRDFXML . '>RDF/XML</option>
+				  <!-- option value="turtle" >Turtle</option -->
 				  <!-- <option value="infos" >Query Structure</option> -->
 				  <!-- <option value="tsv" >TSV</option> -->
 				</select>