我正在尝试从我的脚本文件向我的后端 Rails 5 应用程序发送请求(在普通 JavaScript 中)。
我一直在谷歌搜索和阅读MDN,并尝试不同的东西,但仍然无法让它工作。有谁能帮忙解决这个问题吗?
最近的尝试(如下)遇到了此解析错误 ActionDispatch::Http::Parameters::ParseError (416: Unexpected token at 'object Object]'): 但是,当我尝试不同的格式时,我仍然收到错误,所以我想我一定错过了一些东西。我已经查看了与此相关的其他堆栈溢出问题,但当我尝试实现他们的代码时仍然遇到错误。
Wrapping the ajax request in a promise:
function postRequestPromise(uri) {
return new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.open('POST', uri, true);
xhr.setRequestHeader('Content-Type', 'application/json', 'Accept', 'application/json');
xhr.onload = function () {
resolve(xhr.responseText);
};
xhr.onerror = function () {
reject(xhr.statusText);
};
//Ive tried params in several formats:
//this most recent is giving me a parsing error.
//my goal is to send JSON to the back-end, to be parsed
const params = { hello: "hello", world: "world" };
xhr.send(params);
});
}
Then sending the post request:
postRequestPromise('demo/practice_post')
.then((replyData) => {
console.log(replyData);
})
.catch((err) => {
console.log("ERROR:", err);
});
in the controller, I have tried these things:
class demo < ApplicationController
def practice_post
#all three of these attempts either do not log the body or throw errors:
p request.body.read
p request.raw.post
p params
render plain: "reached demo#practice_post route"
end
end
Thank you for any help!
最佳答案
发送带有参数的请求的部分需要进行 JSON 字符串化。
xhr.send(JSON.stringify(params));
关于javascript - 使用 vanilla JS XMLhttprequest 对象向 Rails 发送 "Post"请求,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50441998/