嘿伙計們，當我嘗試修改快速中間件中的 req.url 時，我遇到了錯誤“[ERR_HTTP_HEADERS_SENT]：無法在將標頭發送到客戶端后設定標頭”。
我的中間件
export function ModifyQueryMiddleware(config, Authconfig, Repo ){
const accessTokenMap = new Map();
return async (request, res, next) => {
const accessToken = request.header('authorization') as string;
if(!accessToken){
throw new HttpException(res, 403)
}
if(!accessTokenMap.get(accessToken)){
const JWKS = jose.createRemoteJWKSet(new URL(config.jkwsUri));
try {
const jwtVerifyResult = await jose.jwtVerify(accessToken.replace('Bearer ', ''), JWKS);
const {payload} = jwtVerifyResult;
accessTokenMap.set(accessToken, payload)
const aumParams = await authentication(payload, authConfig,Repo);
const queryRestrictionStrategy = QueryRestrictionStrategyFactory(aumParams, request)
queryBuilder(queryRestrictionStrategy)
next()
} catch(err){
}
}
const payload = accessTokenMap.get(accessToken);
const aumParams = await authentication(payload, authConfig, repo);
const queryRestrictionStrategy = QueryRestrictionStrategyFactory(aumParams, request)
queryBuilder(queryRestrictionStrategy)
next()
}
}
我的查詢生成器：
export function queryBuilder(strategy: QueryRestrictionStrategy){
const {req, id} = strategy
if(req.url === '/someurl'){
req.url = `/someurl?${id}`
}
return
}
我真的很困惑，因為我沒有修改回應的標頭，而是在沒有查詢構建器的情況下修改查詢，中間件可以正常作業。我已經看過一些關于這個錯誤的問題，但是 res 總是在那里修改。
任何幫助或提示將不勝感激！
uj5u.com熱心網友回復：
當為真時，您的代碼可以呼叫next兩次。!accessTokenMap.get(accessToken)一旦處理了這部分代碼，您就必須回傳：
if (!accessTokenMap.get(accessToken)) {
const JWKS = jose.createRemoteJWKSet(new URL(config.jkwsUri));
try {
...
next();
} catch(err) {
next(err); // make sure to pass the error along!
}
return;
}
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