Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php

@@ -1,105 +0,0 @@
-<?php
-
-namespace GuzzleHttp;
-
-use GuzzleHttp\Promise\PromiseInterface;
-use Psr\Http\Message\RequestInterface;
-
-/**
- * Prepares requests that contain a body, adding the Content-Length,
- * Content-Type, and Expect headers.
- *
- * @final
- */
-class PrepareBodyMiddleware
-{
-    /**
-     * @var callable(RequestInterface, array): PromiseInterface
-     */
-    private $nextHandler;
-
-    /**
-     * @param callable(RequestInterface, array): PromiseInterface $nextHandler Next handler to invoke.
-     */
-    public function __construct(callable $nextHandler)
-    {
-        $this->nextHandler = $nextHandler;
-    }
-
-    public function __invoke(RequestInterface $request, array $options): PromiseInterface
-    {
-        $fn = $this->nextHandler;
-
-        // Don't do anything if the request has no body.
-        if ($request->getBody()->getSize() === 0) {
-            return $fn($request, $options);
-        }
-
-        $modify = [];
-
-        // Add a default content-type if possible.
-        if (!$request->hasHeader('Content-Type')) {
-            if ($uri = $request->getBody()->getMetadata('uri')) {
-                if (is_string($uri) && $type = Psr7\MimeType::fromFilename($uri)) {
-                    $modify['set_headers']['Content-Type'] = $type;
-                }
-            }
-        }
-
-        // Add a default content-length or transfer-encoding header.
-        if (!$request->hasHeader('Content-Length')
-            && !$request->hasHeader('Transfer-Encoding')
-        ) {
-            $size = $request->getBody()->getSize();
-            if ($size !== null) {
-                $modify['set_headers']['Content-Length'] = $size;
-            } else {
-                $modify['set_headers']['Transfer-Encoding'] = 'chunked';
-            }
-        }
-
-        // Add the expect header if needed.
-        $this->addExpectHeader($request, $options, $modify);
-
-        return $fn(Psr7\Utils::modifyRequest($request, $modify), $options);
-    }
-
-    /**
-     * Add expect header
-     */
-    private function addExpectHeader(RequestInterface $request, array $options, array &$modify): void
-    {
-        // Determine if the Expect header should be used
-        if ($request->hasHeader('Expect')) {
-            return;
-        }
-
-        $expect = $options['expect'] ?? null;
-
-        // Return if disabled or if you're not using HTTP/1.1 or HTTP/2.0
-        if ($expect === false || $request->getProtocolVersion() < 1.1) {
-            return;
-        }
-
-        // The expect header is unconditionally enabled
-        if ($expect === true) {
-            $modify['set_headers']['Expect'] = '100-Continue';
-
-            return;
-        }
-
-        // By default, send the expect header when the payload is > 1mb
-        if ($expect === null) {
-            $expect = 1048576;
-        }
-
-        // Always add if the body cannot be rewound, the size cannot be
-        // determined, or the size is greater than the cutoff threshold
-        $body = $request->getBody();
-        $size = $body->getSize();
-
-        if ($size === null || $size >= (int) $expect || !$body->isSeekable()) {
-            $modify['set_headers']['Expect'] = '100-Continue';
-        }
-    }
-}