我已經閱讀了幾篇關於這方面的文章,但沒有一篇適合我。如何使Graphql與CORS一起運行
https://github.com/graphql/express-graphql/issues/14
這裏是我的expressjs代碼:
app.use("/graphql", function (req, res, next) {
res.header('Access-Control-Allow-Origin', 'http://localhost:8080');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With');
if (req.method === 'OPTIONS') {
res.sendStatus(200);
} else {
next();
}
});
// apply graphql middleware
app.use('/graphql', graphqlHTTP({
schema: schema,
rootValue: rootResolver,
graphiql: true,
}))
如果我這樣做,這樣一來,飛行前的選項是成功的,但實際POST請求失敗。
我正在使用此函數向本地graphql服務器發出請求。
function postFn(url, payload) {
return $.ajax({
method: 'POST',
url: url,
contentType: 'application/json',
xhrFields: {
withCredentials: true
},
data: payload
});
}
這裏是前端代碼來觸發POST請求:
let query = `
query myqury($offset: Int, $limit: Int) {
clients(limit:$limit , offset:$offset) {
docs{
_id
full_name
}
total
limit
offset
}
}
`
var variables = {
offset: offset,
limit: limit
}
let payload = {
query: query,
variables: variables
}
return request.post(graphQlEndpoint, payload)
的錯誤信息是:
否「訪問控制允許來源」標題存在於請求的資源