如果接口：Failed to fetch错误，如何关闭连接？使用curRequestController.abort();未生效，请指教

[wpfBruce]

const abortController = new AbortController();
const signal = abortController.signal;
const headers = new Headers();
headers.append('Content-Type', 'application/json');
headers.append('x-client-token', token);
await fetchEventSource(Url, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'x-client-token': ${token},
},
body: JSON.stringify({ chat_detail_id: chat_detail_id }),
signal: signal,
retry: false,
async onopen(response) {
console.log('Open:', response);
if (
response.ok &&
response.headers.get('content-type') === 'text/event-stream'
) {
console.log("everything's good");
} else if (
response.status >= 400 &&
response.status < 500 &&
response.status !== 429
) {
console.log('请求错误');
} else {
console.log('其他错误');
}
},
async onerror(error) {
console.log('Error:', error);
abortController.abort();
},
});

[terryokay]

错误的情况，是不是自己就关闭了？

[wpfBruce]

错误的情况，是不是自己就关了？

那如果我想不让他一直尝试连接，设置 retry: false, 我看源码里是每隔一秒就尝试连接。这个能取消吗？

[pakarsunny]

/**
* Called when there is any error making the request / processing messages /
* handling callbacks etc. Use this to control the retry strategy: if the
* error is fatal, rethrow the error inside the callback to stop the entire
* operation. Otherwise, you can return an interval (in milliseconds) after
* which the request will automatically retry (with the last-event-id).
* If this callback is not specified, or it returns undefined, fetchEventSource
* will treat every error as retriable and will try again after 1 second.
*/
源码里面说如果想要在错误的情况下停止重试，就在onerror里面再抛一个错误，告诉是错误的不再重试

[wpfBruce]

/** * Called when there is any error making the request / processing messages / * handling callbacks etc. Use this to control the retry strategy: if the * error is fatal, rethrow the error inside the callback to stop the entire * operation. Otherwise, you can return an interval (in milliseconds) after * which the request will automatically retry (with the last-event-id). * If this callback is not specified, or it returns undefined, fetchEventSource * will treat every error as retriable and will try again after 1 second. */ 源码里面说如果想要在错误的情况下停止重试，就在onerror里面再抛一个错误，告诉是错误的不再重试

谢谢！

[Xuan-Yu-San]

When I leave my website, an error is thrown: "The user aborted a request."
However, this error cannot be caught by the "onerror" method, resulting in the request being fetched repeatedly.
I don't understand why a request should be aborted in the "onVisibilityChange" method.

[ZhangHanwen96]

onerror(err) {
        // https://github1s.com/Azure/fetch-event-source/blob/HEAD/src/fetch.ts#L132-L133
        // stop retrying
        throw err
      },

不确定是不是你想要的，需要throw err 才不会重试

[wpfBruce]

onerror(err) {
        // https://github1s.com/Azure/fetch-event-source/blob/HEAD/src/fetch.ts#L132-L133
        // stop retrying
        throw err
      },

不确定不是你想要的，需要抛出错误才不会重试

谢谢，已使用抛错解决过了

[ichernev]

Yeah, this is a serious issue, bit me too: #54