从获取中获取数据->承诺->回复 [英] Get the data from fetch -> promise -> response
问题描述
我正在尝试将一些数据发布到服务器,但是我不知道如何获取响应数据.
I am trying to post some data to the server but I don't know how to get back the response data.
我有以下代码:
fetch(url, {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({
email: login,
password: password,
})
}).then(function(a){
console.log(a);
})
它打印一个Response
,其中包含诸如body(ReadableByteStream),bodyUsed(false),ok(true),status(200)等数据.
但我无法找到返回的数据.当我打开chrome开发者控制台-网络时,我在那里看到了响应数据.
It prints a Response
it contains data such as body (ReadableByteStream), bodyUsed (false), ok (true), status (200),...
but I cannot find the data I get back, nowhere. When I open the chrome developer console - network I see the response data there.
我在做什么错了?
我一直在寻找一些资源,如何获取,承诺,...如何工作,但是我找不到写得很好的东西.
I've been looking for some resources how fetch, promises,... work but I couldn't find any well written.
推荐答案
您还可以在获取响应中调用其他方法,例如.json()
或.blob()
.这些方法返回一个Promise,您可以在其上调用.then()
.
There are further methods you call on a fetch response, such as .json()
, or .blob()
. These methods return a promise which you can call .then()
on.
fetch(url, {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({
email: login,
password: password,
})
})
.then(function (a) {
return a.json(); // call the json method on the response to get JSON
})
.then(function (json) {
console.log(json)
})
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