add config options

README.md

@@ -55,6 +55,40 @@ $adapter = new AzureBlobStorageAdapter(
 );
 ```
 
+### Upload transfer tuning
+
+When writing files, you can control the upload behavior via Flysystem's Config on write/writeStream calls:
+
+- initialTransferSize: int (bytes) — size threshold for first transfer; smaller blobs are uploaded in a single request; larger ones switch to chunked upload.
+- maximumTransferSize: int (bytes) — chunk size for block uploads.
+- maximumConcurrency: int — number of concurrent workers for parallel uploads.
+
+Example:
+
+```php
+use League\Flysystem\Config;
+
+$filesystem->write('path/to/file.txt', $contents, new Config([
+    'initialTransferSize' => 64 * 1024 * 1024, // 64MB
+    'maximumTransferSize' => 8 * 1024 * 1024,  // 8MB
+    'maximumConcurrency'  => 8,
+]));
+```
+
+### HTTP headers
+
+```php
+$filesystem->write('path/to/file.txt', $contents, new Config([
+    'httpHeaders' => [
+        'cacheControl' => 'public, max-age=31536000',
+        'contentDisposition' => 'inline',
+        'contentEncoding' => 'gzip',
+        'contentLanguage' => 'en',
+        'contentType' => 'text/plain',
+    ],
+]));
+```
+
 Note that for direct public URLs to work, your container must be configured with public access. If your container is private, you should use the default SAS token approach.
 
 ## Documentation

src/AzureBlobStorageAdapter.php

@@ -32,6 +32,7 @@
 use League\Flysystem\UrlGeneration\TemporaryUrlGenerator;
 use League\MimeTypeDetection\FinfoMimeTypeDetector;
 use League\MimeTypeDetection\MimeTypeDetector;
+use AzureOss\FlysystemAzureBlobStorage\Support\ConfigArrayParser;
 
 final class AzureBlobStorageAdapter implements FilesystemAdapter, ChecksumProvider, TemporaryUrlGenerator, PublicUrlGenerator
 {
@@ -85,35 +86,96 @@ public function directoryExists(string $path): bool
 
     public function write(string $path, string $contents, Config $config): void
     {
-        $this->upload($path, $contents);
+        $this->upload($path, $contents, $config);
     }
 
     public function writeStream(string $path, $contents, Config $config): void
     {
-        $this->upload($path, $contents);
+        $this->upload($path, $contents, $config);
     }
 
     /**
      * @param string|resource $contents
      */
-    private function upload(string $path, $contents): void
+    private function upload(string $path, $contents, ?Config $config = null): void
     {
         try {
-            $path = $this->prefixer->prefixPath($path);
-            $mimetype = $this->mimeTypeDetector->detectMimetype($path, $contents);
+            $options = $this->buildUploadOptionsFromConfig($config);
 
-            $options = new UploadBlobOptions(
-                contentType: $mimetype,
-            );
+            if ($options->httpHeaders->contentType === "" && is_string($contents)) {
+                $options->httpHeaders->contentType = $this->mimeTypeDetector->detectMimeTypeFromBuffer($contents) ?? "";
+            }
 
             $this->containerClient
-                ->getBlobClient($path)
+                ->getBlobClient($this->prefixer->prefixPath($path))
                 ->upload($contents, $options);
         } catch (\Throwable $e) {
             throw UnableToWriteFile::atLocation($path, previous: $e);
         }
     }
 
+    private function buildUploadOptionsFromConfig(?Config $config): UploadBlobOptions
+    {
+        $options = new UploadBlobOptions();
+
+        if ($config === null) {
+            return $options;
+        }
+
+        $data = $config->toArray();
+
+        $initialTransferSize = ConfigArrayParser::parseIntFromArray($data, 'initialTransferSize');
+        if ($initialTransferSize !== null) {
+            $options->initialTransferSize = $initialTransferSize;
+        }
+
+        $maximumTransferSize = ConfigArrayParser::parseIntFromArray($data, 'maximumTransferSize');
+        if ($maximumTransferSize !== null) {
+            $options->maximumTransferSize = $maximumTransferSize;
+        }
+
+        $maximumConcurrency = ConfigArrayParser::parseIntFromArray($data, 'maximumConcurrency');
+        if ($maximumConcurrency !== null) {
+            $options->maximumConcurrency = $maximumConcurrency;
+        }
+
+        $headers = ConfigArrayParser::parseArrayFromArray($data, 'httpHeaders');
+        if ($headers !== null) {
+            $cacheControl = ConfigArrayParser::parseStringFromArray($headers, 'cacheControl', 'httpHeaders.');
+            if ($cacheControl !== null) {
+                $options->httpHeaders->cacheControl = $cacheControl;
+            }
+
+            $contentDisposition = ConfigArrayParser::parseStringFromArray($headers, 'contentDisposition', 'httpHeaders.');
+            if ($contentDisposition !== null) {
+                $options->httpHeaders->contentDisposition = $contentDisposition;
+            }
+
+            $contentEncoding = ConfigArrayParser::parseStringFromArray($headers, 'contentEncoding', 'httpHeaders.');
+            if ($contentEncoding !== null) {
+                $options->httpHeaders->contentEncoding = $contentEncoding;
+            }
+
+            $contentHash = ConfigArrayParser::parseStringFromArray($headers, 'contentHash', 'httpHeaders.');
+            if ($contentHash !== null) {
+                $options->httpHeaders->contentHash = $contentHash;
+            }
+
+            $contentLanguage = ConfigArrayParser::parseStringFromArray($headers, 'contentLanguage', 'httpHeaders.');
+            if ($contentLanguage !== null) {
+                $options->httpHeaders->contentLanguage = $contentLanguage;
+            }
+
+            $contentType = ConfigArrayParser::parseStringFromArray($headers, 'contentType', 'httpHeaders.');
+            if ($contentType !== null) {
+                $options->httpHeaders->contentType = $contentType;
+            }
+        }
+
+        return $options;
+    }
+
+
     public function read(string $path): string
     {
         try {

src/Support/ConfigArrayParser.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AzureOss\FlysystemAzureBlobStorage\Support;
+
+final class ConfigArrayParser
+{
+    /**
+     * @param array<string, mixed> $data
+     */
+    public static function parseIntFromArray(array $data, string $key): ?int
+    {
+        if (!array_key_exists($key, $data) || $data[$key] === null) {
+            return null;
+        }
+        if (!is_int($data[$key])) {
+            throw new \RuntimeException(sprintf('%s must be an int.', $key));
+        }
+        return $data[$key];
+    }
+
+    /**
+     * @param array<string, mixed> $data
+     * @return array<string, mixed>|null
+     */
+    public static function parseArrayFromArray(array $data, string $key): ?array
+    {
+        $value = $data[$key] ?? null;
+        if ($value === null) {
+            return null;
+        }
+        if (!is_array($value)) {
+            throw new \RuntimeException(sprintf('%s must be an array.', $key));
+        }
+        return $value;
+    }
+
+    /**
+     * @param array<string, mixed> $data
+     */
+    public static function parseStringFromArray(array $data, string $key, string $contextPrefix = ''): ?string
+    {
+        $value = $data[$key] ?? null;
+        if ($value === null) {
+            return null;
+        }
+        if (!is_string($value)) {
+            $fullKey = $contextPrefix !== '' ? $contextPrefix . $key : $key;
+            throw new \RuntimeException(sprintf('%s must be a string.', $fullKey));
+        }
+        return $value;
+    }
+}