我正在尝试从我的脚本文件向我的后端rails 5 app发送请求(使用vanilla javascript)。
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。有人能帮忙解决这个问题吗?
最近的尝试(下面)得到了这个解析错误ActionDispatch :: Http :: Parameters :: ParseError(416:' object Object中的意外令牌)'):但是,当我尝试不同的格式时,我仍然会遇到错误,所以我认为我必须遗漏一些东西。我已经查看了其他堆栈溢出问题,但在尝试实现代码时仍然会出错。
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!
答案 0 :(得分:2)
使用params发送请求的部分需要进行JSON字符串化。
xhr.send(JSON.stringify(params));