问题描述
我正在通过 XMLHttpRequest 发送一个 POST 请求，其中将数据输入到 HTML 表单中.不受 JavaScript 干扰的表单将提交其编码为 application/x-www-form-urlencoded 的数据.
I’m sending a POST request via XMLHttpRequest with data entered into an HTML form. The form without interference of JavaScript would submit its data encoded as application/x-www-form-urlencoded.
使用 XMLHttpRequest，我想通过 FormData API 发送数据，该 API 不起作用，因为它将数据视为编码为 multipart/form-data.因此，我需要将数据作为查询字符串，正确转义，写入 XMLHttpRequest 的发送方法.
With the XMLHttpRequest, I wanted to send the data with via the FormData API which does not work since it treats the data as if it were encoded as multipart/form-data. Therefor I need to write the data as a query string, properly escaped, into the send method of the XMLHttpRequest.
addEntryForm.addEventListener('submit', function(event) {
// Gather form data
var formData = new FormData(this);
// Array to store the stringified and encoded key-value-pairs.
var parameters = []
for (var pair of formData.entries()) {
parameters.push(
encodeURIComponent(pair[0]) + '=' +
encodeURIComponent(pair[1])
);
}
var httpRequest = new XMLHttpRequest();
httpRequest.open(form.method, form.action);
httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
httpRequest.onreadystatechange = function() {
if (httpRequest.readyState === XMLHttpRequest.DONE) {
if (httpRequest.status === 200) {
console.log('Successfully submitted the request');
} else {
console.log('Error while submitting the request');
}
}
};
httpRequest.send(parameters.join('&'));
// Prevent submitting the form via regular request
event.preventDefault();
});
现在，带有 for ... of 循环等的整个事情似乎有点令人费解.有没有更简单的方法将 FormData 转换为查询字符串?或者我可以用不同的编码发送 FormData 吗?
Now this whole thing with the for ... of loop, etc. seems a bit convoluted. Is there a simpler way to transform FormData into a query string? Or can I somehow send FormData with a different encoding?
推荐答案
你可以使用 URLSearchParams
const queryString = new URLSearchParams(new FormData(myForm)).toString()
这篇关于将 FormData 转换为查询字符串的更简单方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！