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我可以从获取承诺中获取请求参数吗？

[英]Can I get the request parameters from a fetch promise?

原文 2018-07-25 19:45:59 3 1 javascript/ fetch

tl;dr tl; dr

After I execute a fetch call, can I access the original request data ( eg headers, method, url, etc. )? 执行fetch调用后，是否可以访问原始请求数据（ 例如，标头，方法，URL等 ）？

I'm using fetch() to build an API client. 我正在使用fetch()构建API客户端。

I have some helpers that modify the request ( eg getJson() adds 'Content-Type': 'application/json' to the request header ). 我有一些帮助程序可以修改请求（ 例如， getJson()将'Content-Type': 'application/json'到请求标头中 ）。

I want to write a unit test that verifies that that getJson does, in fact, add the Content-Type header. 我想编写一个单元测试，以验证getJson确实添加了Content-Type标头。

In order to do this, I want to read the actual request information that went out . 为此，我想读取发出的实际请求信息 。

Is it possible to access this information? 是否可以访问此信息？ If so, how? 如果是这样，怎么办？

It's worth noting that I tried building a Request object and pass it to my helpers so I can return it for the tests. 值得一提的，我试图建立一个Request对象，并把它传递给我的助手，所以我可以返回它的测试。 Safari, however, doesn't seem to support native Request objects yet. 但是，Safari似乎还不支持本机Request对象。 I need to support Safari. 我需要支持Safari。 Also, it's still experimental... so, I'm probably going to scrap this approach altogether. 另外，它仍处于实验阶段...因此，我可能将完全放弃这种方法。

1 个解决方案

I'm not sure if I'm understanding your question but I'll try my best. 我不确定是否能理解您的问题，但我会尽力而为。

The JS fetch() should return a response which includes all of the data that was sent. JS fetch（）应该返回一个包含所有已发送数据的响应。

The following code should return the headers send by your fetch. 以下代码应返回您的提取发送的标头。

fetch(yourURL, yourOptions).then((response) => response.headers)

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