laravel之request源码

index.php入口使用request

$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);

$response = $kernel->handle(
    $request = Illuminate\Http\Request::capture()
);

request初始化路径

vendor/laravel/framework/src/Illuminate/Http/Request.php

 /**
     * Create a new Illuminate HTTP request from server variables.
     *
     * @return static
     */
    public static function capture()
    {
        static::enableHttpMethodParameterOverride();

        return static::createFromBase(SymfonyRequest::createFromGlobals());
    }

vendor/symfony/http-foundation/Request.php

  public static function createFromGlobals()
    {
        $request = self::createRequestFromFactory($_GET, $_POST, [], $_COOKIE, $_FILES, $_SERVER);

        if (0 === strpos($request->headers->get('CONTENT_TYPE'), 'application/x-www-form-urlencoded')
            && \in_array(strtoupper($request->server->get('REQUEST_METHOD', 'GET')), ['PUT', 'DELETE', 'PATCH'])
        ) {
            parse_str($request->getContent(), $data);
            $request->request = new ParameterBag($data);
        }

        return $request;
    }

createRequestFromFactory返回结果调用的方法：

   public function initialize(array $query = [], array $request = [], array $attributes = [], array $cookies = [], array $files = [], array $server = [], $content = null)
    {
        $this->request = new ParameterBag($request);
        $this->query = new ParameterBag($query);
        $this->attributes = new ParameterBag($attributes);
        $this->cookies = new ParameterBag($cookies);
        $this->files = new FileBag($files);
        $this->server = new ServerBag($server);
        $this->headers = new HeaderBag($this->server->getHeaders());

        $this->content = $content;
        $this->languages = null;
        $this->charsets = null;
        $this->encodings = null;
        $this->acceptableContentTypes = null;
        $this->pathInfo = null;
        $this->requestUri = null;
        $this->baseUrl = null;
        $this->basePath = null;
        $this->method = null;
        $this->format = null;
    }

从上面可以看出，request的核心属性都是从这个函数中读取的。其中FileBag,ServerBag,HeaderBag都是继承的ParameterBag。

FileBag中的核心逻辑

     */
    public function set($key, $value)
    {
        if (!\is_array($value) && !$value instanceof UploadedFile) {
            throw new \InvalidArgumentException('An uploaded file must be an array or an instance of UploadedFile.');
        }

        parent::set($key, $this->convertFileInformation($value));
    }

其中 UploadedFile的构造方法如下：

class UploadedFile extends File
{
    private $test;
    private $originalName;
    private $mimeType;
    private $error;

    /**
     * Accepts the information of the uploaded file as provided by the PHP global $_FILES.
     *
     * The file object is only created when the uploaded file is valid (i.e. when the
     * isValid() method returns true). Otherwise the only methods that could be called
     * on an UploadedFile instance are:
     *
     *   * getClientOriginalName,
     *   * getClientMimeType,
     *   * isValid,
     *   * getError.
     *
     * Calling any other method on an non-valid instance will cause an unpredictable result.
     *
     * @param string      $path         The full temporary path to the file
     * @param string      $originalName The original file name of the uploaded file
     * @param string|null $mimeType     The type of the file as provided by PHP; null defaults to application/octet-stream
     * @param int|null    $error        The error constant of the upload (one of PHP's UPLOAD_ERR_XXX constants); null defaults to UPLOAD_ERR_OK
     * @param bool        $test         Whether the test mode is active
     *                                  Local files are used in test mode hence the code should not enforce HTTP uploads
     *
     * @throws FileException         If file_uploads is disabled
     * @throws FileNotFoundException If the file does not exist
     */
    public function __construct(string $path, string $originalName, string $mimeType = null, int $error = null, $test = false)
    {
        $this->originalName = $this->getName($originalName);
        $this->mimeType = $mimeType ?: 'application/octet-stream';

        if (4 < \func_num_args() ? !\is_bool($test) : null !== $error && @filesize($path) === $error) {
            @trigger_error(sprintf('Passing a size as 4th argument to the constructor of "%s" is deprecated since Symfony 4.1.', __CLASS__), E_USER_DEPRECATED);
            $error = $test;
            $test = 5 < \func_num_args() ? func_get_arg(5) : false;
        }

        $this->error = $error ?: UPLOAD_ERR_OK;
        $this->test = $test;

        parent::__construct($path, UPLOAD_ERR_OK === $this->error);
    }

request对外暴露的快捷使用方法

vendor/laravel/framework/src/Illuminate/Http/Concerns/InteractsWithFlashData.php

vendor/laravel/framework/src/Illuminate/Http/Concerns/InteractsWithInput.php