/**
* Add the appropriate expect header to a request
*
* @param EntityEnclosingRequestInterface $request Request to update
* @param EntityBodyInterface $body Entity body of the request
* @param string|int $expect Expect header setting
*/
protected function addExpectHeader(EntityEnclosingRequestInterface $request, EntityBodyInterface $body, $expect)
{
// Allow the `expect` data parameter to be set to remove the Expect header from the request
if ($expect === false) {
$request->removeHeader('Expect');
} elseif ($expect !== true) {
// Default to using a MB as the point in which to start using the expect header
$expect = $expect ?: 1048576;
// If the expect_header value is numeric then only add if the size is greater than the cutoff
if (is_numeric($expect) && $body->getSize()) {
if ($body->getSize() < $expect) {
$request->removeHeader('Expect');
} else {
$request->setHeader('Expect', '100-Continue');
}
}
}
}
/**
* Set the size that the entity body of the request must exceed before adding the Expect: 100-Continue header.
*
* @param int|bool $size Cutoff in bytes. Set to false to never send the expect header (even with non-seekable data)
*
* @return self
*/
public function setExpectHeaderCutoff($size)
{
$this->expectCutoff = $size;
if ($size === false || !$this->body) {
$this->removeHeader('Expect');
} elseif ($this->body && $this->body->getSize() && $this->body->getSize() > $size) {
$this->setHeader('Expect', '100-Continue');
}
return $this;
}
/**
* Create a cache key for a response's body
*
* @param string $url URL of the entry
* @param EntityBodyInterface $body Response body
*
* @return string
*/
protected function getBodyKey($url, EntityBodyInterface $body)
{
return $this->keyPrefix . md5($url) . $body->getContentMd5();
}