Close http clients after using

The crystal http client maintains a keepalive connection to the other
server which stays alive for some time. This should be closed if the
client instance is not used again to avoid hogging resources

src/invidious.cr

@@ -2123,14 +2123,13 @@ get "/api/v1/annotations/:id" do |env|
 
       file = URI.encode_www_form("#{id[0, 3]}/#{id}.xml")
 
-      client = make_client(ARCHIVE_URL)
-      location = client.get("/download/youtubeannotations_#{index}/#{id[0, 2]}.tar/#{file}")
+      location = make_client(ARCHIVE_URL, &.get("/download/youtubeannotations_#{index}/#{id[0, 2]}.tar/#{file}"))
 
       if !location.headers["Location"]?
         env.response.status_code = location.status_code
       end
 
-      response = make_client(URI.parse(location.headers["Location"])).get(location.headers["Location"])
+      response = make_client(URI.parse(location.headers["Location"]), &.get(location.headers["Location"]))
 
       if response.body.empty?
         env.response.status_code = 404
@@ -3481,8 +3480,12 @@ get "/videoplayback" do |env|
         location = URI.parse(response.headers["Location"])
         env.response.headers["Access-Control-Allow-Origin"] = "*"
 
-        host = "#{location.scheme}://#{location.host}"
-        client = make_client(URI.parse(host), region)
+        new_host = "#{location.scheme}://#{location.host}"
+        if new_host != host
+          host = new_host
+          client.close
+          client = make_client(URI.parse(new_host), region)
+        end
 
         url = "#{location.full_path}&host=#{location.host}#{region ? "&region=#{region}" : ""}"
       else
@@ -3513,7 +3516,6 @@ get "/videoplayback" do |env|
     end
 
     begin
-      client = make_client(URI.parse(host), region)
       client.get(url, headers) do |response|
         response.headers.each do |key, value|
           if !RESPONSE_HEADERS_BLACKLIST.includes?(key.downcase)
@@ -3554,8 +3556,6 @@ get "/videoplayback" do |env|
       chunk_end = chunk_start + HTTP_CHUNK_SIZE - 1
     end
 
-    client = make_client(URI.parse(host), region)
-
     # TODO: Record bytes written so we can restart after a chunk fails
     while true
       if !range_end && content_length
@@ -3619,6 +3619,7 @@ get "/videoplayback" do |env|
         if ex.message != "Error reading socket: Connection reset by peer"
           break
         else
+          client.close
           client = make_client(URI.parse(host), region)
         end
       end
@@ -3628,6 +3629,7 @@ get "/videoplayback" do |env|
       first_chunk = false
     end
   end
+  client.close
 end
 
 get "/ggpht/*" do |env|

src/invidious/comments.cr

@@ -269,6 +269,8 @@ def fetch_reddit_comments(id, sort_by = "confidence")
     raise InfoException.new("Could not fetch comments")
   end
 
+  client.close
+
   comments = result[1].data.as(RedditListing).children
   return comments, thread
 end

src/invidious/helpers/proxy.cr

@@ -108,7 +108,9 @@ def filter_proxies(proxies)
       proxy = HTTPProxy.new(proxy_host: proxy[:ip], proxy_port: proxy[:port])
       client.set_proxy(proxy)
 
-      client.head("/").status_code == 200
+      status_ok = client.head("/").status_code == 200
+      client.close
+      status_ok
     rescue ex
       false
     end
@@ -132,6 +134,7 @@ def get_nova_proxies(country_code = "US")
   headers["Referer"] = "https://www.proxynova.com/proxy-server-list/country-#{country_code}/"
 
   response = client.get("/proxy-server-list/country-#{country_code}/", headers)
+  client.close
   document = XML.parse_html(response.body)
 
   proxies = [] of {ip: String, port: Int32, score: Float64}
@@ -177,6 +180,7 @@ def get_spys_proxies(country_code = "US")
   }
 
   response = client.post("/free-proxy-list/#{country_code}/", headers, form: body)
+  client.close
   20.times do
     if response.status_code == 200
       break

src/invidious/helpers/utils.cr

@@ -101,6 +101,15 @@ def make_client(url : URI, region = nil)
   return client
 end
 
+def make_client(url : URI, region = nil, &block)
+  client = make_client(url, region)
+  begin
+    yield client
+  ensure
+    client.close
+  end
+end
+
 def decode_length_seconds(string)
   length_seconds = string.gsub(/[^0-9:]/, "").split(":").map &.to_i
   length_seconds = [0] * (3 - length_seconds.size) + length_seconds
@@ -361,7 +370,7 @@ def subscribe_pubsub(topic, key, config)
     "hub.secret"        => key.to_s,
   }
 
-  return make_client(PUBSUB_URL).post("/subscribe", form: body)
+  return make_client(PUBSUB_URL, &.post("/subscribe", form: body))
 end
 
 def parse_range(range)

src/invidious/jobs/bypass_captcha_job.cr

@@ -91,6 +91,8 @@ class Invidious::Jobs::BypassCaptchaJob < Invidious::Jobs::BaseJob
               },
             }.to_json).body)
 
+            captcha_client.close
+
             raise response["error"].as_s if response["error"]?
             task_id = response["taskId"].as_i
 

src/invidious/users.cr

@@ -427,7 +427,7 @@ def generate_captcha(key, db)
 end
 
 def generate_text_captcha(key, db)
-  response = make_client(TEXTCAPTCHA_URL).get("/omarroth@protonmail.com.json").body
+  response = make_client(TEXTCAPTCHA_URL, &.get("/omarroth@protonmail.com.json").body)
   response = JSON.parse(response)
 
   tokens = response["a"].as_a.map do |answer|