使用提取时文本响应为空 [英] Text response is empty when using fetch
问题描述
以下代码:
fetch('http:// localhost:8080 / root / 1487171054127 / k_query_bearer_token',{
模式:'no-cors',凭据:'include'
})
.then(function(response){
return response.text();
}}
.then(函数(文本){
console.log('请求成功',text.length);
})
.catch(函数(错误){
log('Request failed',error)
});
正在输出:
请求成功0
如果我使用curl:
curl'http:// localhost:8080 / root / 1487171054127 / k_query_bearer_token'\
-H'Cookie:JSESSIONID = CviS9IK8pcsqADdP-m0MRXX_AvUqfzjJPwk1Yytf。 ee16d0a01ad5'
我以文本形式返回令牌(长度!= 0)。
如果我通过以下方式输出响应标头:
curl'http://本地主机:8080 / root / 1487171054127 / k_query_bearer_token'
-H'Cookie:JSESSIONID = CviS9IK8pcsqADdP-m0MRXX_AvUqfzjJPwk1Yytf.ee16d0a01ad5'
--head $ b $ c> $
我得到:
HTTP / 1.1 200 OK
连接:keep-alive
X-Powered-By:Undertow / 1
服务器:JBoss-EAP / 7
内容类型:text / plain
内容长度:1730
日期:2017年2月15日,星期三16:17:00 GMT
为什么我没有收到任何文字通过获取?
解决方案删除模式:'no-cors'
。
当您使用模式:'no-cors'
时,您明确指定要使用 stackoverflow.com/questions/36292537/what-is-an-opaque-request-and-what-it-serves-for>不透明的响应 。
您的脚本无法访问不透明响应的任何属性-实际上,您所能做的就是缓存它。 模式:'no-cors'
基本上仅在与Service Worker进行缓存时有用。
如果原因让脚本使用 mode:'no-cors'
是因为对服务器的跨域请求否则将不起作用,正确的解决方案是更新服务器端发送 Access-Control-Allow-Origin
响应标头和其他CORS标头的代码(如果您可以访问服务器,则可以这样做),否则,请使用反向代理(如 https://cors-anywhere.herokuapp.com/ 。
The following code:
fetch('http://localhost:8080/root/1487171054127/k_query_bearer_token', {
mode: 'no-cors', credentials: 'include'
})
.then(function (response) {
return response.text();
})
.then(function (text) {
console.log('Request successful', text.length);
})
.catch(function (error) {
log('Request failed', error)
});
is outputting:
Request successful 0
If I use curl:
curl 'http://localhost:8080/root/1487171054127/k_query_bearer_token' \
-H 'Cookie: JSESSIONID=CviS9IK8pcsqADdP-m0MRXX_AvUqfzjJPwk1Yytf.ee16d0a01ad5'
I get a token in text form back (length != 0).
And if I output the response header via:
curl 'http://localhost:8080/root/1487171054127/k_query_bearer_token'
-H 'Cookie: JSESSIONID=CviS9IK8pcsqADdP-m0MRXX_AvUqfzjJPwk1Yytf.ee16d0a01ad5'
--head
I get:
HTTP/1.1 200 OK
Connection: keep-alive
X-Powered-By: Undertow/1
Server: JBoss-EAP/7
Content-Type: text/plain
Content-Length: 1730
Date: Wed, 15 Feb 2017 16:17:00 GMT
Why am I getting no text via fetch?
解决方案 Remove mode: 'no-cors'
.
When you use mode: 'no-cors'
you’re explicitly specifying that you want an "opaque response".
Your script can’t access any properties of an opaque response—instead essentially all you can do is cache it. mode: 'no-cors'
is basically useful only when doing caching with Service Workers.
If the reason you have your script using mode: 'no-cors'
is because cross-origin requests to the server otherwise won’t work, the right solution is either to update the server-side code to send the Access-Control-Allow-Origin
response header and other CORS headers—if you have access to the server do to that—or else, use a reverse proxy like https://cors-anywhere.herokuapp.com/.
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