使用Guzzle 6 HTTP Client检索整个XML响应主体 [英] Retrieve the whole XML response body with Guzzle 6 HTTP Client

问题描述

我想使用Guzzle 6从远程API检索xml响应。这是我的代码：

I wanted to use Guzzle 6 to retrieve an xml response from a remote API. This is my code:

$client = new Client([
    'base_uri' => '<my-data-endpoint>',
]);
$response = $client->get('<URI>', [
    'query' => [
        'token' => '<my-token>',
    ],
    'headers' => [
        'Accept' => 'application/xml'
    ]
]);
$body = $response->getBody();

Vardumping $ body 将返回 GuzzleHttp \Psr7 \Stream 对象：

Vardumping the $body would return a GuzzleHttp\Psr7\Stream object:

object(GuzzleHttp\Psr7\Stream)[453] 
private 'stream' => resource(6, stream)
...
...

I然后可以调用 $ body-> read（1024）从响应中读取1024个字节（以xml读取）。

I could then call $body->read(1024) to read 1024 bytes from the response (which would read in xml).

但是，我想从我的请求中检索整个XML响应，因为我需要稍后使用 SimpleXML 扩展来解析它。

However, I'd like to retrieve the whole XML response from my request since I will need to parse it later using the SimpleXML extension.

如何从 GuzzleHttp \Psr7 \Stream 对象中最佳地检索XML响应，以便它可用于解析？

How can I best retrieve the XML response from GuzzleHttp\Psr7\Stream object so that it is usable for parsing?

而是否会循环播放？

while($body->read(1024)) {
    ...
}

我很感激你的建议。

推荐答案

GuzzleHttp \\Psr7 \Stream 实现 Psr \Http\Message\StreamInterface ，其中包含以下内容：

The GuzzleHttp\Psr7\Stream implemtents the contract of Psr\Http\Message\StreamInterface which has the following to offer to you:

/** @var $body GuzzleHttp\Psr7\Stream */
$contents = (string) $body;

将对象转换为字符串将调用底层的 __ toString（）方法是接口的一部分。 方法名 __ toString（） 在PHP中很特别。

Casting the object to string will call the underlying __toString() method which is part of the interface. The method name __toString() is special in PHP.

由于 GuzzleHttp 中的实现错过提供对实际流句柄的访问，所以你无法制作使用PHP的流功能，允许在环境下进行更多流式（流式）操作，例如 stream_copy_to_stream ， stream_get_contents 或 file_put_contents 。这可能在第一眼看上去并不明显。

As the implementation within GuzzleHttp "missed" to provide access to the actual stream handle, so you can't make use of PHP's stream functions which allows more "stream-lined" (stream-like) operations under circumstances, like stream_copy_to_stream, stream_get_contents or file_put_contents. This might not be obvious on first sight.

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