file_get_contents('php://input') 返回带有 PATCH 请求的空字符串 [英] file_get_contents('php://input') returning empty string with a PATCH request

问题描述

我的环境是PHP 5.5.9，Nginx 1.4.6-1ubuntu3.2，本地主机.

My environment is PHP 5.5.9, Nginx 1.4.6-1ubuntu3.2, localhost.

我正在尝试从 PATCH 方法中获取数据，但这只是返回一个空字符串...使用 POST 方法可以正常工作，这是我的脚本的一部分:

I'm trying to get data from PATCH method, but that just return an empty string... With POST method that's work fine, this is a piece of my script :

case 'POST':
case 'PATCH':
     $this->data = file_get_contents("php://input");

$this->data 在使用 PATCH 方法时为空，在 POST 时完成，我使用 POSTMAN chrome 扩展并推送 RAW 数据(不是 multipart/form-data)

$this->data is empty when PATCH method is used and complete when POST, i use the POSTMAN chrome extension and i push RAW data (not multipart/form-data)

我认为 Nginx 有问题...但日志文件中没有任何内容...

I think Nginx was in fault...but nothing into the log file...

任何帮助将不胜感激！

推荐答案

我最近在尝试访问 php://input 以获取 PUT 请求时遇到了类似的问题.问题很简单，我之前已经访问过它一次(在相关代码之前运行的日志记录函数中).

I recently ran into a similar issue trying to access php://input for a PUT request. The issue was simply that I had already accessed it once previously (in a logging function that ran prior to the code in question).

POST 的行为与其他方法不同，这解释了差异:

POST acts differently than the other methods, which explains the discrepancy:

注意:在 PHP 5.6 之前，使用 php://input 打开的流只能被读取一次；流不支持搜索操作.但是，根据 SAPI 实现，可能可以打开另一个 php://input 流并重新开始读取.这仅在请求正文数据已保存的情况下才有可能.通常，这是 POST 请求的情况，而不是其他请求方法，例如 PUT 或 PROPFIND.

Note: Prior to PHP 5.6, a stream opened with php://input could only be read once; the stream did not support seek operations. However, depending on the SAPI implementation, it may be possible to open another php://input stream and restart reading. This is only possible if the request body data has been saved. Typically, this is the case for POST requests, but not other request methods, such as PUT or PROPFIND.

来源:http://php.net/manual/en/wrappers.php.php

解决方案很简单:将 php://input 从初始抓取的值存储到 PHP 变量中，并且不要尝试运行 file_get_contents("php://input") 对于非 POST 请求不止一次.

The solution was simple: Store the value of php://input from the initial grab to a PHP variable, and don't try to run file_get_contents("php://input") more than once for a non-POST request.

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