Submit derive task after all uploads completed

lib/Archive.php

@@ -26,7 +26,7 @@ class Archive {
 			}
 		}
 
-		throw new Exception("Error $resp processing tasks");
+		throw new Exception($req->body);
 	}
 
 	static function upload(File $file, $identifier, $filename, $metadata = [], ?Callable $callback = null) {
@@ -56,6 +56,8 @@ class Archive {
 			}
 		}
 
+		$headers[] = "content-type:application/pdf";
+
 
 		$req = new HTTPRequest();
 		if ($callback) {
@@ -66,7 +68,7 @@ class Archive {
 		if ($resp == 200) {
 			return true;
 		}
-		throw new Exception($req->body);
+		throw new Exception($resp . ": " . $req->body);
 	}
 
 	static function metadata($identifier) {
@@ -84,7 +86,30 @@ class Archive {
 			}
 		}
 
-		throw new Exception("Error " . $resp . " during metadata get");
+		throw new Exception($resp . ": " . $req->body);
+	}
+
+	static function derive($identifier) {
+		$req = new HTTPRequest();
+
+		$data = [
+			"identifier" => $identifier,
+			"cmd" => "derive.php",
+			"args" => [],
+			"priority" => 0
+		];
+
+		$resp = $req->post("https://archive.org/services/tasks.php", json_encode($data), [
+			"Authorization: LOW " . Config::get("ARCHIVE_KEY") . ":" . Config::get("ARCHIVE_SECRET"),
+			"content-type:application/json",
+		]);
+
+		if ($resp == 200) {
+			return true;
+		}
+
+		throw new Exception($resp . ": " . $req->body);
+
 	}
 
 }

lib/Job.php

@@ -72,6 +72,10 @@ abstract class Job {
 
 	// Mark the job as failed miserably
 	public function fail($message = "") {
+		if (is_terminal()) {
+			print("  !! " . $message . "\n");
+		}
+		
 		$db = DB::getInstance();
 		if ($message != "") {
 			$db->update("job", $this->_jobid, [