here: https://github.com/zendframework/zend-psr7bridge/blob/master/src/Psr7ServerRequest.php#L112

...
'tmp_name' => $upload->getStream()
...

this should be string not StreamInterface because of that zend-validator almost all file validators does not work. Also:

// do request with 1 file
$files = $request->getUploadedFiles(); // returns array with 1 file
$request = Psr7ServerRequest::toZend($request);
$request2 = Psr7ServerRequest::fromZend($request);
$files2 = $request2->getUploadedFiles(); // return empty array

I understand that PSR7 does not have method in interface to retrieve tmp_name but maybe some kind of workaround could be used?

In Expressive is BodyParamsMiddleware which handles body parsing (x-www-form-urlencoded and json). I think it would be useful to have same function in Psr7ServerRequest. I can create PR.

When converting a PSR7 Response object that includes a real Stream (a file download, for instance), the conversion reads the entire body and returns a ZendResponse.

This throws a memory exceeded limit in the case of large files. This Is caused by trying to read the entire body of the response instead of passing along a Stream object

Is there a reason why the server params aren't passed to the PSR-7 server request? Should I open a PR?

Since the docs are located elsewhere this repo's empty wiki should be disabled.

Cookies don't seem to be handled at all by Psr7ServerRequest::fromZend(). Is there a reason for that or is this just not implemented yet?

This bug causes Zend Router to fail when used with Zend Expressive when the index is outside of the server root. The issue is that the scheme://host should not be part of Zend Request requestUri.

//Zend\Request
$this->setRequestUri((string) $uri); //the scheme + host should be removed here
// $this->setRequestUri(preg_replace('#^[^/:]+://[^/]+#', '', $uri));

Test case

use PHPUnit\Framework\TestCase;
use Zend\Diactoros\ServerRequestFactory;
use Zend\Http\PhpEnvironment\Request as ZendRequest;
use Zend\Psr7Bridge\Psr7ServerRequest;

class Bug extends TestCase
{
    public function test()
    {
        $_SERVER = [
            'HTTP_HOST' => 'host.com',
            'SERVER_PORT' => '80',
            'REQUEST_URI' => '/test/path/here/',
            'SCRIPT_FILENAME' => '/c/root/test/path/here/index.php',
            'PHP_SELF' => '/test/path/here/index.php',
            'SCRIPT_NAME' => '/test/path/here/index.php',
        ];

        $psr7 = ServerRequestFactory::fromGlobals();
        $converted = Psr7ServerRequest::toZend($psr7);
        $zend = new ZendRequest();

        $this->assertSame($zend->getBaseUrl(), $converted->getBaseUrl());
    }

PHPUnit 6.5.2 by Sebastian Bergmann and contributors.

F                                                                   1 / 1 (100%)

Time: 272 ms, Memory: 4.00MB

There was 1 failure:

1) Bug::test
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'/test/path/here'
+''

tests\Bug.php:27
phpunit\phpunit\phpunit:53

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.

thanks :)

\Zend\Psr7Bridge\Psr7ServerRequest::convertUploadedFiles() tries to access $upload->getStream() which fails on $upload->getError() !== UPLOAD_ERR_OK - see \Zend\Diactoros\UploadedFile::getStream().