SuperCurl to provide a re-usable curl options stack and just change options that are different from one call to the next

1 files changed, 112 insertions, 0 deletions

diff --git a/Zotlabs/Lib/SuperCurl.php b/Zotlabs/Lib/SuperCurl.php
new file mode 100644
index 000000000..40ca1addb
--- /dev/null
+++ b/Zotlabs/Lib/SuperCurl.php
@@ -0,0 +1,112 @@
+<?php
+
+namespace Zotlabs\Lib;
+
+/**
+ * @brief wrapper for z_fetch_url() which can be instantiated with several built-in parameters and 
+ * these can be modified and re-used. Useful for CalDAV and other processes which need to authenticate
+ * and set lots of CURL options (many of which stay the same from one call to the next). 
+ */
+
+
+
+
+class SuperCurl {
+
+	
+    private $auth;
+    private $url;
+
+	private $curlopt = array();
+
+	private $headers = null;
+    public $filepos = 0;
+	public $filehandle = 0;
+    public $request_data = '';
+
+	private $request_method = 'GET';
+	private $upload = false;
+
+
+    private function set_data($s) {
+        $this->request_data = $s;
+        $this->filepos = 0;
+    }
+
+    public function curl_read($ch,$fh,$size) {
+
+        if($this->filepos < 0) {
+            unset($fh);
+            return '';
+        }
+
+        $s = substr($this->request_data,$this->filepos,$size);
+
+        if(strlen($s) < $size)
+            $this->filepos = (-1);
+        else
+            $this->filepos = $this->filepos + $size;
+
+        return $s;
+    }
+
+
+	public function __construct($opts = array()) {
+		$this->set($opts);
+	}
+
+	private function set($opts = array()) {
+		if($opts) {
+			foreach($opts as $k => $v) {
+				switch($k) {
+					case 'http_auth':
+						$this->auth = $v;
+						break;
+					case 'custom':
+						$this->request_method = $v;
+						break;
+					case 'url':
+						$this->url = $v;
+						break;
+					case 'data':
+						$this->set_data($v);
+						if($v) {
+							$this->upload = true;
+						}
+						else {
+							$this->upload = false;
+						}							
+						break;
+					case 'headers':
+						$this->headers = $v;
+						break;
+					default:
+						$this->curlopts[$k] = $v;
+						break;
+				}
+			}
+		}
+	}
+
+	function exec() {
+		$opts = $this->curlopts;
+		if($this->auth)
+			$opts['http_auth'] = $this->auth;
+		if($this->custom)
+			$opts['custom'] = $this->custom;
+		if($this->headers)
+			$opts['headers'] = $this->headers;
+		if($this->upload) {
+			$opts['upload'] = true;
+			$opts['infile'] = $this->filehandle;
+			$opts['infilesize'] = strlen($this->request_data);
+			$opts['readfunc'] = [ $this, 'curl_read' ] ;
+		}
+
+		$recurse = 0;
+		return z_fetch_url($this->url,true,$recurse,(($opts) ? $opts : null)); 
+		
+	}
+		
+	
+}