initial

2 files changed, 250 insertions, 0 deletions

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..33d58b2
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+git clone to ``plugins.local/af_zz_api_resize``.
diff --git a/init.php b/init.php
new file mode 100644
index 0000000..af7b77c
--- /dev/null
+++ b/init.php
@@ -0,0 +1,249 @@
+<?php
+class Af_Zz_Api_Resize extends Plugin {
+
+	/* @var PluginHost $host */
+	private $host;
+
+	function about() {
+		return array(1.0,
+			"Resizes images as requested by API clients",
+			"fox");
+	}
+
+	function is_public_method($method) {
+		return $method === "api_resize";
+	}
+
+	function init($host) {
+		$this->host = $host;
+
+		$host->add_hook($host::HOOK_RENDER_ARTICLE_API, $this);
+		//$host->add_hook($host::HOOK_ENCLOSURE_ENTRY, $this);
+	}
+
+	function hook_enclosure_entry($enc) {
+		if (preg_match("/image/", $enc["content_type"])) {
+			$enc["content_url"] = $this->rewrite_url_if_needed($enc["content_url"]);
+		}
+
+		return $enc;
+	}
+
+	private function make_thumbnail($input_filename, $output_filename, $dim_max_x = 600, $dim_max_y = 600, $force_stamp = false) {
+
+		$o_im = @imagecreatefromstring(file_get_contents($input_filename));
+
+		if ($o_im) {
+			$imageinfo = @getimagesizefromstring($input_filename);
+
+			$o_width = imagesx($o_im) ;
+			$o_height = imagesy($o_im) ;
+
+			if (max($o_width, $o_height) < max($dim_max_x, $dim_max_y)) {
+				$t_height = $o_height;
+				$t_width = $o_width;
+			} else {
+				if ($o_height > $o_width) {
+					$t_height = $dim_max_x;
+					$t_width = round($o_width/$o_height * $t_height);
+				} else {
+					$t_width = $dim_max_y;
+					$t_height = round($o_height/$o_width * $t_width);
+				}
+			}
+
+			//		print "$o_file : $t_file : $o_height * $o_width -> $t_height * $t_width<br>";
+
+			$t_im = imageCreateTrueColor($t_width, $t_height);
+
+			if ($force_stamp || ($imageinfo && $imageinfo["mime"] == "image/gif")) {
+				$need_stamp = true;
+				$need_alpha = false;
+
+				imageFill($t_im, 0, 0, 0xffffff);
+			} else {
+				$need_stamp = false;
+				if ($imageinfo && $imageinfo["mime"] == "image/png") {
+					$need_alpha = true;
+
+					imagealphablending($t_im, false);
+					imagesavealpha($t_im, true);
+				}
+			}
+
+			imageCopyResampled($t_im, $o_im, 0, 0, 0, 0,
+				$t_width, $t_height, $o_width, $o_height);
+
+			if ($need_stamp) {
+				$stamp = imagecreatefrompng('images/play-outline.png');
+
+				if ($stamp) {
+					$sx = imagesx($stamp);
+					$sy = imagesy($stamp);
+
+					imagecopy($t_im, $stamp,
+						imagesx($t_im)/2 - $sx/2,
+						imagesy($t_im)/2 - $sy/2,
+						0, 0,
+						imagesx($stamp), imagesy($stamp));
+				}
+			}
+
+			if ($need_stamp || !$need_alpha)
+				@imageJpeg($t_im, $output_filename, 75);
+			else
+				@imagePng($t_im, $output_filename, 5);
+
+			imageDestroy($o_im);
+			imageDestroy($t_im);
+		}
+	}
+
+	public function api_resize() {
+
+		$url = rewrite_relative_url(get_self_url_prefix(), $_REQUEST["url"]);
+		$width = (int) $_REQUEST["width"];
+
+		$local_filename = CACHE_DIR . "/images/" . sha1($url);
+		$flag_filename = CACHE_DIR . "/images/" . sha1($url) . ".flag";
+		$resized_filename = CACHE_DIR . "/images/" . sha1($url) . "-$width";
+
+		if (!file_exists($flag_filename) || !$width) {
+			header("Location: $url");
+			return;
+		}
+
+		header("Content-Disposition: inline; filename=\"".basename($local_filename)."\"");
+
+		if (file_exists($local_filename) && filesize($local_filename) > 0) {
+
+			if (file_exists($resized_filename) && filesize($resized_filename) > 0)
+				send_local_file($resized_filename);
+			else {
+				$this->make_thumbnail($local_filename, $resized_filename, $width, $width);
+
+				if (file_exists($resized_filename) && filesize($resized_filename) > 0 && filesize($resized_filename) < filesize($local_filename))
+					send_local_file($resized_filename);
+				else
+					send_local_file($local_filename);
+			}
+
+		} else {
+			$data = fetch_file_contents(["url" => $url, "max_size" => MAX_CACHE_FILE_SIZE]);
+
+			if ($data) {
+
+				if (file_put_contents($local_filename, $data)) {
+					$mimetype = mime_content_type($local_filename);
+					header("Content-type: $mimetype");
+
+					/*  MAKE RESIZED THUMBNAIL IF NEEDED, get local_filename, send it */
+
+					if (file_exists($resized_filename) && filesize($resized_filename) > 0)
+						send_local_file($resized_filename);
+					else {
+						$this->make_thumbnail($local_filename, $resized_filename, $width, $width);
+
+						if (file_exists($resized_filename) && filesize($resized_filename) > 0 && filesize($resized_filename) < filesize($local_filename))
+							send_local_file($resized_filename);
+						else
+							send_local_file($local_filename);
+					}
+
+				} else {
+					print $data;
+				}
+			} else {
+				global $fetch_last_error;
+				global $fetch_last_error_code;
+				global $fetch_last_error_content;
+
+				if (function_exists("imagecreate") && !isset($_REQUEST["text"])) {
+					$img = imagecreate(450, 75);
+
+					/*$bg =*/ imagecolorallocate($img, 255, 255, 255);
+					$textcolor = imagecolorallocate($img, 255, 0, 0);
+
+					imagerectangle($img, 0, 0, 450-1, 75-1, $textcolor);
+
+					imagestring($img, 5, 5, 5, "Proxy request failed", $textcolor);
+					imagestring($img, 5, 5, 30, truncate_middle($url, 46, "..."), $textcolor);
+					imagestring($img, 5, 5, 55, "HTTP Code: $fetch_last_error_code", $textcolor);
+
+					header("Content-type: image/png");
+					print imagepng($img);
+					imagedestroy($img);
+
+				} else {
+					header("Content-type: text/html");
+
+					http_response_code(400);
+
+					print "<h1>Proxy request failed.</h1>";
+					print "<p>Fetch error $fetch_last_error ($fetch_last_error_code)</p>";
+					print "<p>URL: $url</p>";
+					print "<textarea cols='80' rows='25'>" . htmlspecialchars($fetch_last_error_content) . "</textarea>";
+				}
+			}
+		}
+	}
+
+	function rewrite_url_if_needed($url, $width) {
+		if (strpos($url, "data:") !== 0) {
+			$flag_filename = CACHE_DIR . "/images/" . sha1($url) . ".flag";
+
+			@touch($flag_filename);
+
+			return get_self_url_prefix() . "/public.php?op=pluginhandler&plugin=af_zz_api_resize&pmethod=api_resize&url=" .
+				urlencode($url) . "&width=" . $width;
+			}
+
+		return $url;
+	}
+
+	function hook_render_article_api($params) {
+		$need_saving = false;
+		$width = (int) clean($_REQUEST["resize_width"]);
+
+		$doc = new DOMDocument();
+		if (@$doc->loadHTML('<?xml encoding="UTF-8">' . $params["headline"]["content"])) {
+			$xpath = new DOMXPath($doc);
+			$imgs = $xpath->query("//img[@src]");
+
+			foreach ($imgs as $img) {
+				$new_src = $this->rewrite_url_if_needed($img->getAttribute("src"), $width);
+
+				if ($new_src != $img->getAttribute("src")) {
+					$img->setAttribute("src", $new_src);
+					$img->removeAttribute("srcset");
+
+					$need_saving = true;
+				}
+			}
+
+			$vids = $xpath->query("(//picture)");
+
+			foreach ($vids as $vid) {
+				$vsrcs = $xpath->query("source", $vid);
+
+				foreach ($vsrcs as $vsrc) {
+					$new_src = $this->rewrite_url_if_needed($vsrc->getAttribute("src"), $width);
+
+					if ($new_src != $vsrc->getAttribute("src")) {
+						$vid->setAttribute("src", $new_src);
+
+						$need_saving = true;
+					}
+				}
+			}
+		}
+
+		if ($need_saving) $params["headline"]["content"] = $doc->saveHTML();
+
+		return $params["headline"];
+	}
+
+	function api_version() {
+		return 2;
+	}
+}