Make OpenGraph URLs absolute

app/models.py

@@ -578,13 +578,25 @@ class Package(db.Model):
 		screenshot = self.screenshots.filter_by(approved=True).order_by(db.asc(PackageScreenshot.id)).first()
 		return screenshot.getThumbnailURL(level) if screenshot is not None else None
 
-	def getMainScreenshotURL(self):
+	def getMainScreenshotURL(self, absolute=False):
 		screenshot = self.screenshots.filter_by(approved=True).order_by(db.asc(PackageScreenshot.id)).first()
-		return screenshot.url if screenshot is not None else None
+		if screenshot is None:
+			return None
 
-	def getDetailsURL(self):
-		return url_for("packages.view",
-				author=self.author.username, name=self.name)
+		if absolute:
+			from app.utils import abs_url
+			return abs_url(screenshot.url)
+		else:
+			return screenshot.url
+
+	def getDetailsURL(self, absolute=False):
+		if absolute:
+			from app.utils import abs_url_for
+			return abs_url_for("packages.view",
+					author=self.author.username, name=self.name)
+		else:
+			return url_for("packages.view",
+					author=self.author.username, name=self.name)
 
 	def getEditURL(self):
 		return url_for("packages.create_edit",

app/templates/packages/view.html

@@ -10,9 +10,9 @@
 	<meta name="og:title" content="{{ package.title }}"/>
 	<meta name="og:description" content="{{ package.short_desc }}"/>
 	<meta name="description" content="{{ package.short_desc }}"/>
-	<meta name="og:url" content="{{ package.getDetailsURL() }}"/>
+	<meta name="og:url" content="{{ package.getDetailsURL(absolute=True) }}"/>
 	{% if package.getMainScreenshotURL() %}
-	<meta name="og:image" content="{{ package.getMainScreenshotURL() }}"/>
+	<meta name="og:image" content="{{ package.getMainScreenshotURL(absolute=True) }}"/>
 	{% endif %}
 {% endblock %}
 

app/utils.py

@@ -21,11 +21,15 @@ from flask_login import login_user, logout_user
 from .models import *
 from . import app
 import random, string, os, imghdr
+from urllib.parse import urljoin
 
 def abs_url_for(path, **kwargs):
 	scheme = "https" if app.config["BASE_URL"][:5] == "https" else "http"
 	return url_for(path, _external=True, _scheme=scheme, **kwargs)
 
+def abs_url(path):
+	return urljoin(app.config["BASE_URL"], path)
+
 def get_int_or_abort(v, default=None):
 	try:
 		return int(v or default)