support zot location independent urls

3 files changed, 134 insertions, 22 deletions

diff --git a/Zotlabs/Lib/Activity.php b/Zotlabs/Lib/Activity.php
index bcbe53df7..9aaf6d866 100644
--- a/Zotlabs/Lib/Activity.php
+++ b/Zotlabs/Lib/Activity.php
@@ -2,10 +2,7 @@
 
 namespace Zotlabs\Lib;
 
-use Zotlabs\Lib\Libzot;
-use Zotlabs\Lib\Libsync;
-use Zotlabs\Lib\ActivityStreams;
-use Zotlabs\Lib\Group;
+use Zotlabs\Zot6\HTTPSig;
 
 class Activity {
 
@@ -43,6 +40,46 @@ class Activity {
 
 	}
 
+	static function fetch($url,$channel = null) {
+		$redirects = 0;
+		if(! check_siteallowed($url)) {
+			logger('blacklisted: ' . $url);
+			return null;
+		}
+		if(! $channel) {
+			$channel = get_sys_channel();
+		}
+
+		logger('fetch: ' . $url, LOGGER_DEBUG);
+
+		if(strpos($url,'x-zot:') === 0) {
+			$x = ZotURL::fetch($url,$channel);
+		}
+		else {
+			$m = parse_url($url);
+			$headers = [
+				'Accept'           => 'application/activity+json, application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
+				'Host'             => $m['host'],
+				'(request-target)' => 'get ' . get_request_string($url),
+				'Date'             => datetime_convert('UTC','UTC','now','D, d M Y H:i:s') . ' UTC'
+			];
+			$h = HTTPSig::create_sig($headers,$channel['channel_prvkey'],channel_url($channel),false);
+			$x = z_fetch_url($url, true, $redirects, [ 'headers' => $h ] );
+		}
+
+		if($x['success']) {
+			$y = json_decode($x['body'],true);
+			logger('returned: ' . json_encode($y,JSON_PRETTY_PRINT|JSON_UNESCAPED_SLASHES));
+			return json_decode($x['body'], true);
+		}
+		else {
+			logger('fetch failed: ' . $url);
+		}
+		return null;
+	}
+
+
+
 
 	static function fetch_person($x) {
 		return self::fetch_profile($x);
diff --git a/Zotlabs/Lib/ActivityStreams.php b/Zotlabs/Lib/ActivityStreams.php
index 49978031e..a357b6d69 100644
--- a/Zotlabs/Lib/ActivityStreams.php
+++ b/Zotlabs/Lib/ActivityStreams.php
@@ -263,24 +263,8 @@ class ActivityStreams {
 		return self::fetch($url);
 	}
 
-	static function fetch($url) {
-		$redirects = 0;
-		if(! check_siteallowed($url)) {
-			logger('blacklisted: ' . $url);
-			return null;
-		}
-		logger('fetch: ' . $url, LOGGER_DEBUG);
-		$x = z_fetch_url($url, true, $redirects,
-			[ 'headers' => [ 'Accept: application/activity+json, application/ld+json; profile="https://www.w3.org/ns/activitystreams"' ]]);
-		if($x['success']) {
-			$y = json_decode($x['body'],true);
-			logger('returned: ' . json_encode($y,JSON_PRETTY_PRINT|JSON_UNESCAPED_SLASHES));
-			return json_decode($x['body'], true);
-		}
-		else {
-			logger('fetch failed: ' . $url);
-		}
-		return null;
+	static function fetch($url,$channel = null) {
+		return Activity::fetch($url,$channel);
 	}
 
 	static function is_an_actor($s) {
diff --git a/Zotlabs/Lib/ZotURL.php b/Zotlabs/Lib/ZotURL.php
new file mode 100644
index 000000000..d1c705fcb
--- /dev/null
+++ b/Zotlabs/Lib/ZotURL.php
@@ -0,0 +1,91 @@
+<?php
+
+namespace Zotlabs\Lib;
+
+use Zotlabs\Zot6\HTTPSig;
+
+
+class ZotURL {
+
+	static public function fetch($url,$channel) {
+
+		$ret = [ 'success' => false ];
+
+		if(strpos($url,'x-zot:') !== 0) {
+			return $ret;
+		}
+
+
+		if(! $url) {
+			return $ret;
+		}
+
+		$portable_url = substr($url,6);
+		$u = explode('/',$portable_url);		
+		$portable_id = $u[0];
+
+		$hosts = self::lookup($portable_id);
+
+		if(! $hosts) {
+			return $ret;
+		}
+
+		foreach($hosts as $h) {
+			$newurl = $h . '/id/' . $portable_url;
+
+			$m = parse_url($newurl);
+
+			$data = json_encode([ 'zot_token' => random_string() ]);
+
+			if($channel && $m) {
+
+				$headers = [ 
+					'Accept'           => 'application/x-zot+json', 
+					'Content-Type'     => 'application/x-zot+json',
+					'X-Zot-Token'      => random_string(),
+					'Digest'           => HTTPSig::generate_digest_header($data),
+					'Host'             => $m['host'],
+					'(request-target)' => 'post ' . get_request_string($newurl)
+				];
+				$h = HTTPSig::create_sig($headers,$channel['channel_prvkey'],channel_url($channel),false);
+			}
+			else {
+				$h = [ 'Accept: application/x-zot+json' ]; 
+			}
+				
+			$result = [];
+
+			$redirects = 0;
+			$x = z_post_url($newurl,$data,$redirects, [ 'headers' => $h  ] );
+			if($x['success']) {
+				return $x;
+			}
+		}
+
+		return $ret;
+
+	}
+
+	static public function is_zoturl($s) {
+
+		if(strpos($url,'x-zot:') === 0) {
+			return true;
+		}
+		return false;
+	}
+
+
+	static public function lookup($portable_id) {
+
+		$r = q("select * from hubloc left join site on hubloc_url = site_url where hubloc_hash = '%s' and site_dead = 0 order by hubloc_primary desc",
+			dbesc($portable_id)
+		);
+
+		if(! $r) {
+			// extend to network lookup
+			return false;
+		}
+		return ids_to_array($r,'hubloc_url');
+	}
+
+}
\ No newline at end of file