Fix IHTTPResult::getHeader()

- Now returns a string array, like expected
- Fix usages
- Fix dataset

src/Network/CurlResult.php

@@ -245,7 +245,7 @@ class CurlResult implements IHTTPResult
 	public function getHeader($header)
 	{
 		if (empty($header)) {
-			return '';
+			return [];
 		}
 
 		$header = strtolower(trim($header));
@@ -256,7 +256,7 @@ class CurlResult implements IHTTPResult
 			return $headers[$header];
 		}
 
-		return '';
+		return [];
 	}
 
 	/** {@inheritDoc} */
@@ -289,7 +289,11 @@ class CurlResult implements IHTTPResult
 			$parts = explode(':', $line);
 			$headerfield = strtolower(trim(array_shift($parts)));
 			$headerdata = trim(implode(':', $parts));
-			$this->header_fields[$headerfield] = $headerdata;
+			if (empty($this->header_fields[$headerfield])) {
+				$this->header_fields[$headerfield] = [$headerdata];
+			} elseif (!in_array($headerdata, $this->header_fields[$headerfield])) {
+				$this->header_fields[$headerfield][] = $headerdata;
+			}
 		}
 
 		return $this->header_fields;

src/Network/IHTTPResult.php

@@ -19,7 +19,7 @@ interface IHTTPResult
 	/**
 	 * Returns the Content Type
 	 *
-	 * @return string the Content Type
+	 * @return string[] the Content Types
 	 */
 	public function getContentType();
 
@@ -29,7 +29,7 @@ interface IHTTPResult
 	 *
 	 * @param string $header optional header field. Return all fields if empty
 	 *
-	 * @return string the headers or the specified content of the header variable
+	 * @return string[] the headers or the specified content of the header variable
 	 */
 	public function getHeader($header);
 

src/Network/Probe.php

@@ -429,7 +429,7 @@ class Probe
 		}
 
 		// If it isn't a HTML file then exit
-		if (($curlResult->getContentType() != '') && !strstr(strtolower($curlResult->getContentType()), 'html')) {
+		if (!in_array('html', $curlResult->getContentType())) {
 			return false;
 		}