From f152dba43779897e29aae6629915c36cb954f37a Mon Sep 17 00:00:00 2001
From: mykola2312 <49044616+mykola2312@users.noreply.github.com>
Date: Sun, 3 Apr 2022 14:41:28 +0300
Subject: [PATCH] implement scrape request

---
 announce.php | 13 -------------
 network.php  | 12 ++++++++++++
 scrape.php   | 43 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+), 13 deletions(-)
 create mode 100644 scrape.php

diff --git a/announce.php b/announce.php
index 3a06c2f..8ed89a4 100644
--- a/announce.php
+++ b/announce.php
@@ -6,19 +6,6 @@ $DB_NAME = "torrent";
 $ANN_MIN_INTERVAL = 15;
 $ANN_INTERVAL = 60;
 
-function bad_request($msg)
-{
-    http_response_code(400);
-    echo($msg);
-    exit;
-}
-
-function do_error($msg)
-{
-    die($msg);
-}
-
-
 if (!isset($_GET["info_hash"])) {
     bad_request("No info_hash");
 }
diff --git a/network.php b/network.php
index 180811f..6174a0e 100644
--- a/network.php
+++ b/network.php
@@ -1,5 +1,17 @@
 <?php
 
+function bad_request($msg)
+{
+    http_response_code(400);
+    echo($msg);
+    exit;
+}
+
+function do_error($msg)
+{
+    die($msg);
+}
+
 function ip4_loopback()
 {
     return inet_pton("127.0.0.1");
diff --git a/scrape.php b/scrape.php
new file mode 100644
index 0000000..7cf98f4
--- /dev/null
+++ b/scrape.php
@@ -0,0 +1,43 @@
+<?php
+require("../php/config.php");
+require("network.php");
+require("tracker.php");
+$DB_NAME = "torrent";
+
+if (!isset($_GET["info_hash"])) {
+    bad_request("No info_hash");
+}
+
+try {
+    $hash = hash_decode($_GET["info_hash"]);
+    $hashLen = strlen($hash);
+    if ($hashLen < 40 || $hashLen > 40) {
+        bad_request("Invalid info_hash");
+    }
+} catch (Exception $e) {
+    bad_request("Invalid info_hash");
+}
+
+$conn = new PDO("mysql:host=$DB_HOST;dbname=$DB_NAME", $DB_USER, $DB_PASS);
+$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+$stmt = $conn->prepare("SELECT count(*) FROM `peers` WHERE info_hash = :info_hash");
+$stmt->bindValue(":info_hash", $hash, PDO::PARAM_STR);
+$stmt->execute();
+
+$name = "torrent-" . $hash;
+$count = intval($stmt->fetchColumn());
+
+$response = array(
+    "files" => array(
+        hash_encode($hash) => array(
+            "complete" => $count,
+            "downloaded" => $count,
+            "incomplete" => 0,
+            "name" => $name,
+        ),
+    ),
+);
+echo(bencode($response));
+
+?>
\ No newline at end of file