根据CORS规范,GET和POST请求应该透明地遵循302重定向。但是Chrome取消了我的请求。
以下是执行请求的JS代码:
这里是应该发生的事情:
当请求运行时,我可以在Chrome的网络面板中看到只有一个XHR——一个被取消的POST请求,没有响应头或响应体。
使用Chrome的net-internals工具进行调试,我看到服务器发送了一个响应,之后请求被取消。以下是请求的输出:
在最后,你会看到"Cancelled",因为出现了"URL_REQUEST_BLOCKED_ON_DELEGATE"。我不知道这是什么意思。但是,如果没有HTTP 302重定向,就不会出现这个错误。
有人知道是什么导致Chrome取消这个请求吗?
以下是执行请求的JS代码:
var r = new XMLHttpRequest();
r.open('GET', 'https://dev.mysite.com/rest', true);
r.send();
这里是应该发生的事情:
- 客户端: XHR POST请求到/rest
- 服务器: 响应HTTP 302重定向到/rest/
- 客户端: 跟随重定向
当请求运行时,我可以在Chrome的网络面板中看到只有一个XHR——一个被取消的POST请求,没有响应头或响应体。
使用Chrome的net-internals工具进行调试,我看到服务器发送了一个响应,之后请求被取消。以下是请求的输出:
79295: URL_REQUEST
https://dev.mysite.com/rest
Start Time: 2013-08-30 12:41:11.637
t=1377880871637 [st= 0] +REQUEST_ALIVE [dt=13455]
t=1377880871638 [st= 1] URL_REQUEST_BLOCKED_ON_DELEGATE [dt=1]
--> delegate = "extension Adblock Plus"
t=1377880871639 [st= 2] +URL_REQUEST_START_JOB [dt=13453]
--> load_flags = 143540480 (DO_NOT_SAVE_COOKIES | DO_NOT_SEND_AUTH_DATA | DO_NOT_SEND_COOKIES | ENABLE_LOAD_TIMING | MAYBE_USER_GESTURE | REPORT_RAW_HEADERS | VERIFY_EV_CERT)
--> method = "POST"
--> priority = 2
--> upload_id = "0"
--> url = "https://dev.mysite.com/rest"
t=1377880871639 [st= 2] HTTP_CACHE_GET_BACKEND [dt=0]
t=1377880871639 [st= 2] +HTTP_STREAM_REQUEST [dt=7]
t=1377880871646 [st= 9] HTTP_STREAM_REQUEST_BOUND_TO_JOB
--> source_dependency = 79296 (HTTP_STREAM_JOB)
t=1377880871646 [st= 9] -HTTP_STREAM_REQUEST
t=1377880871646 [st= 9] +HTTP_TRANSACTION_SEND_REQUEST [dt=0]
t=1377880871646 [st= 9] HTTP_TRANSACTION_SEND_REQUEST_HEADERS
--> GET /facultyportfolio-rest HTTP/1.1
Host: dev.liberty.edu
Connection: keep-alive
Content-Length: 46
Origin: http://localhost:8080
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.62 Safari/537.36
Content-Type: application/json; charset=UTF-8
Accept: */*
Referer: http://localhost:8080/ajaxtest.html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
t=1377880871646 [st= 9] HTTP_TRANSACTION_SEND_REQUEST_BODY
--> did_merge = true
--> is_chunked = false
--> length = 46
t=1377880871646 [st= 9] -HTTP_TRANSACTION_SEND_REQUEST
t=1377880871646 [st= 9] +HTTP_TRANSACTION_READ_HEADERS [dt=1001]
t=1377880871646 [st= 9] HTTP_STREAM_PARSER_READ_HEADERS [dt=1000]
t=1377880872646 [st= 1009] HTTP_TRANSACTION_READ_RESPONSE_HEADERS
--> HTTP/1.1 302 Found
Date: Fri, 30 Aug 2013 16:41:11 GMT
Server: Apache/2
Access-Control-Allow-Origin: http://localhost:8080
Access-Control-Allow-Credentials: true
Location: https://dev.mysite.com/rest/
Content-Language: en-US
Vary: Accept-Encoding,User-Agent
Content-Encoding: gzip
Content-Length: 20
Connection: close
Content-Type: text/plain; charset=UTF-8
t=1377880872647 [st= 1010] -HTTP_TRANSACTION_READ_HEADERS
t=1377880872647 [st= 1010] +URL_REQUEST_BLOCKED_ON_DELEGATE [dt=12445]
t=1377880885091 [st=13454] CANCELLED
t=1377880885092 [st=13455] -URL_REQUEST_START_JOB
--> net_error = -3 (ERR_ABORTED)
t=1377880885092 [st=13455] -REQUEST_ALIVE
在最后,你会看到"Cancelled",因为出现了"URL_REQUEST_BLOCKED_ON_DELEGATE"。我不知道这是什么意思。但是,如果没有HTTP 302重定向,就不会出现这个错误。
有人知道是什么导致Chrome取消这个请求吗?