first commit -> move some files from one-api

vendor/aws_sdk/Aws/S3/BucketEndpointMiddleware.php

@@ -0,0 +1,120 @@
+<?php
+namespace Aws\S3;
+
+use Aws\CommandInterface;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Used to update the host used for S3 requests in the case of using a
+ * "bucket endpoint" or CNAME bucket.
+ *
+ * IMPORTANT: this middleware must be added after the "build" step.
+ *
+ * @internal
+ */
+class BucketEndpointMiddleware
+{
+    private static $exclusions = ['GetBucketLocation' => true];
+    private $nextHandler;
+
+    /**
+     * Create a middleware wrapper function.
+     *
+     * @return callable
+     */
+    public static function wrap()
+    {
+        return function (callable $handler) {
+            return new self($handler);
+        };
+    }
+
+    public function __construct(callable $nextHandler)
+    {
+        $this->nextHandler = $nextHandler;
+    }
+
+    public function __invoke(CommandInterface $command, RequestInterface $request)
+    {
+        $nextHandler = $this->nextHandler;
+        $bucket = $command['Bucket'];
+
+        if ($bucket && !isset(self::$exclusions[$command->getName()])) {
+            $request = $this->modifyRequest($request, $command);
+        }
+
+        return $nextHandler($command, $request);
+    }
+
+    /**
+     * Performs a one-time removal of Bucket from path, then if
+     * the bucket name is duplicated in the path, performs additional
+     * removal which is dependent on the number of occurrences of the bucket
+     * name in a path-like format in the key name.
+     *
+     * @return string
+     */
+    private function removeBucketFromPath($path, $bucket, $key)
+    {
+        $occurrencesInKey = $this->getBucketNameOccurrencesInKey($key, $bucket);
+        do {
+            $len = strlen($bucket) + 1;
+            if (substr($path, 0, $len) === "/{$bucket}") {
+                $path = substr($path, $len);
+            }
+        } while (substr_count($path, "/{$bucket}") > $occurrencesInKey + 1);
+
+        return $path ?: '/';
+    }
+
+    private function removeDuplicateBucketFromHost($host, $bucket)
+    {
+        if (substr_count($host, $bucket) > 1) {
+            while (strpos($host, "{$bucket}.{$bucket}") === 0) {
+                $hostArr = explode('.', $host);
+                array_shift($hostArr);
+                $host = implode('.', $hostArr);
+            }
+        }
+        return $host;
+    }
+
+    private function getBucketNameOccurrencesInKey($key, $bucket)
+    {
+        $occurrences = 0;
+        if (empty($key)) {
+            return $occurrences;
+        }
+
+        $segments = explode('/', $key);
+        foreach($segments as $segment) {
+            if (strpos($segment, $bucket) === 0) {
+                $occurrences++;
+            }
+        }
+        return $occurrences;
+    }
+
+    private function modifyRequest(
+        RequestInterface $request,
+        CommandInterface $command
+    ) {
+        $key = isset($command['Key']) ? $command['Key'] : null;
+        $uri = $request->getUri();
+        $path = $uri->getPath();
+        $host = $uri->getHost();
+        $bucket = $command['Bucket'];
+        $path = $this->removeBucketFromPath($path, $bucket, $key);
+        $host = $this->removeDuplicateBucketFromHost($host, $bucket);
+
+        // Modify the Key to make sure the key is encoded, but slashes are not.
+        if ($key) {
+            $path = S3Client::encodeKey(rawurldecode($path));
+        }
+
+        return $request->withUri(
+            $uri->withHost($host)
+                ->withPath($path)
+        );
+    }
+}