[英]Error connecting to a rest webservice from behond a proxy server
我从代理服务器后面连接到我的其余Web服务时遇到问题。 我有以下ajax电话
$.ajax({
async: false,
url: "http://localhost:8080/Card/rest/UploadBackground"
}).done(function ( data ) {
arr = JSON.parse(data);
updateSlider(arr);
}).fail(function ( data ) {
alert('falied');
});
调用以下服务
@GET
@Produces(MediaType.TEXT_PLAIN)
public Response getBackgroundImages(@QueryParam("missions") String missions,
@QueryParam("objects") String objects,
@QueryParam("dates") String date) {
String result= "";
......
try {
.....
result = dbman.extractQueriedData(queryMissions, queryObjects, date);
} else {
result = dbman.extractPopular();
}
} catch(SQLException ex){
LoggingServices.createExceptionLogMessage(ex, LOGGER);
}
return Response.ok()
.entity(result)
.header("Access-Control-Allow-Origin", "*")
.header("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT")
.allow("OPTIONS").build();
}
当我在本地服务器上运行所有内容时,该代码有效。 但是,当我将其上传到代理服务器后面的服务器时,出现错误,根据chrome net-internals页面
245: URL_REQUEST
http://localhost:8080/Card/rest/UploadBackground
Start Time: 2017-03-23 16:23:19.477
t=12380 [st= 0] +REQUEST_ALIVE [dt=1305]
--> priority = "HIGHEST"
--> url = "http://localhost:8080/Card/rest/UploadBackground"
t=12380 [st= 0] URL_REQUEST_DELEGATE [dt=0]
t=12380 [st= 0] +URL_REQUEST_START_JOB [dt=1305]
--> load_flags = 51008 (DO_NOT_SAVE_COOKIES | DO_NOT_SEND_AUTH_DATA | DO_NOT_SEND_COOKIES | IGNORE_LIMITS | MAYBE_USER_GESTURE | VERIFY_EV_CERT)
--> method = "GET"
--> url = "http://localhost:8080/Card/rest/UploadBackground"
t=12380 [st= 0] URL_REQUEST_DELEGATE [dt=0]
t=12380 [st= 0] HTTP_CACHE_GET_BACKEND [dt=0]
t=12380 [st= 0] HTTP_CACHE_OPEN_ENTRY [dt=0]
t=12380 [st= 0] HTTP_CACHE_ADD_TO_ENTRY [dt=0]
t=12380 [st= 0] HTTP_CACHE_READ_INFO [dt=0]
t=12380 [st= 0] +HTTP_STREAM_REQUEST [dt=303]
t=12380 [st= 0] HTTP_STREAM_REQUEST_STARTED_JOB
--> source_dependency = 248 (HTTP_STREAM_JOB)
t=12683 [st= 303] HTTP_STREAM_REQUEST_BOUND_TO_JOB
--> source_dependency = 248 (HTTP_STREAM_JOB)
t=12683 [st= 303] -HTTP_STREAM_REQUEST
t=12683 [st= 303] +HTTP_TRANSACTION_SEND_REQUEST [dt=0]
t=12683 [st= 303] HTTP_TRANSACTION_SEND_REQUEST_HEADERS
--> GET /Card/rest/UploadBackground HTTP/1.1
Host: localhost:8080
Connection: keep-alive
Accept: */*
Origin: http://mycard.xxx.yyy
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36
Referer: http://mycard.xxx.yyy/mainPage.html
Accept-Encoding: gzip, deflate, sdch, br
Accept-Language: en-US,en;q=0.8
t=12683 [st= 303] -HTTP_TRANSACTION_SEND_REQUEST
t=12683 [st= 303] +HTTP_TRANSACTION_READ_HEADERS [dt=1002]
t=12683 [st= 303] HTTP_STREAM_PARSER_READ_HEADERS [dt=1002]
--> net_error = -324 (ERR_EMPTY_RESPONSE)
t=13685 [st=1305] -HTTP_TRANSACTION_READ_HEADERS
--> net_error = -324 (ERR_EMPTY_RESPONSE)
t=13685 [st=1305] -URL_REQUEST_START_JOB
--> net_error = -324 (ERR_EMPTY_RESPONSE)
t=13685 [st=1305] URL_REQUEST_DELEGATE [dt=0]
t=13685 [st=1305] -REQUEST_ALIVE
--> net_error = -324 (ERR_EMPTY_RESPONSE)
有人可以解释错误是什么吗? 这与代理服务器有关吗?
干杯,
es
解
经过4天多的时间,我终于开始工作了。 问题仅仅是跨域问题,而我解决的方法是使用jsonp和具有正确网址映射的。 在服务器端,我将MediaType更改为MediaType.APPLICATION_JSON,并且返回值包含在回调函数名称中,请参见下文
@GET
@Produces( MediaType.APPLICATION_JSON)
public String getBackgroundImages(@QueryParam("missions") Stringmissions,
@QueryParam("objects") String objects,
@QueryParam("dates") String date) {
String result= "";
......
try {
.....
result = dbman.extractQueriedData(queryMissions, queryObjects, date);
} else {
result = dbman.extractPopular();
}
} catch(SQLException ex){
LoggingServices.createExceptionLogMessage(ex, LOGGER);
}
return String res = "jsonCallback("+ result +");";
}
在javascript方面
$.ajax({ async: false, url: "/rest/UploadBackground/", jsonp: "callback", type:"GET", dataType: "jsonp", jsonpCallback: "jsonCallback", success: function( response ) { } }); window.jsonCallback = function(data) { //do something };
最重要的问题是
希望这对其他人有帮助,
干杯,
es
“ Localhost”是一个特别定义的名称,它解析为127.0.0.1(即回送地址),并且只能在同一台计算机上使用,不能在任何其他网络上访问。
如果您的URL具有“ localhost”作为权限,则它们只能在与服务器相同的计算机上工作。
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