我正在尝试生成一个pdf文件,使用GeoExt打印地图,但遇到了问题。在Chrome上,我收到错误消息:
XMLHttpRequest cannot load http://Howard:8080/geoserver/pdf/create.json. Origin http://localhost:55608 is not allowed by Access-Control-Allow-Origin.
我认为错误消息告诉我它与代理有关,所以我尝试将以下内容添加到Config.yaml但不是运气:
- !localMatch
dummy: true
- !ipMatch
host: 0.0.0.0
mask: 0.0.0.0
这应该允许所有本地IP地址和所有主机访问Howard:8080中的create.json但由于某种原因我仍然收到错误消息。
但是,在Firefox上我的行为略有不同。我没有收到任何错误消息,但我最终触发了一个错误消息“通信失败。”
的printexception。我被困在想法中,有人可以帮忙吗?
以下是代码:
var printProvider = new GeoExt.data.PrintProvider({
//method: "GET", // "POST" recommended for production use
method: "POST", // "POST" recommended for production use
//capabilities: g_printCapabilities, // provide url instead for lazy loading
url: OpenLayers.ProxyHost + "http://Howard:8080/geoserver/pdf/",
//url: "http://Howard:8080/geoserver/pdf/",
autoLoad: true,
customParams: {
mapTitle: "GeoExt Printing Demo",
comment: "This demo shows how to use GeoExt.PrintMapPanel with OSM"
}
});
var printPage = new GeoExt.data.PrintPage({
printProvider: printProvider
});
var mapPanel = new GeoExt.MapPanel({
title: "Map",
region: "center",
height: 400,
width: 600,
map: map,
bbar: ["->", {
text: "Print",
handler: function() {
// convenient way to fit the print page to the visible map area
printPage.fit(mapPanel, true);
printProvider.print(mapPanel, printPage);
}
}]
});
// create a panel and add the map panel and grid panel
// inside it
var mainPanel = new Ext.Panel({
renderTo: "mainpanel",
layout: "border",
height: 800,
width: 600,
items: [mapPanel]
});
编辑:
我在javascript中添加了以下代码:
var invocation = new XMLHttpRequest();
var url = 'http://Howard:8080/geoserver/pdf/create.json';
function callOtherDomain() {
if(invocation) {
invocation.open('POST', url, true);
invocation.onreadystatechange = function (){
alert("invocation.onreadystatechange");
}
invocation.send();
}
}
callOtherDomain();
但我仍然收到错误消息。我是否在Howard服务器上添加了Access-Control-Allow-Origin标头?如果是这样,我该怎么做?
编辑2:
我在后面的代码中添加了以下内容:
Response.AddHeader("Access-Control-Allow-Origin", "*");
Response.AddHeader("Access-Control-Allow-Headers", "POST");
Response.AddHeader("Access-Control-Allow-Headers", "GET");
我还提出了以下内容:
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
</customHeaders>
在我的web.config文件中调用pdf文件的机器上添加了两个代码块,但仍然没有运气。
编辑3。
如果我不包含任何矢量图层,则pdf文件似乎正确生成。这适用于Firefox和Chrome。我有IE的单独问题所以无法在那里测试。
答案 0 :(得分:0)
我在当前来源的服务器上使用代理方法,在客户端我只是重写打印并创建网址:
"loadcapabilities": function () {
if (self.printProvider.capabilities.createURL.indexOf('url') === -1) {
self.printProvider.capabilities.createURL = GMARC.geoserverPrintProxy + '?url=' + encodeURIComponent(self.printProvider.capabilities.createURL);
self.printProvider.capabilities.printURL = GMARC.geoserverPrintProxy + '?url=' + encodeURIComponent(self.printProvider.capabilities.printURL);
}
},
在服务器端,类似于node.js上的内容:
url = 'http://geoserveripaddress:8080/geoserver/pdf/' + self.c.req.params.id;
var method = self.c.req.params.id === 'info.json' ? 'GET' : 'POST', params = {};
request(url,
{
auth: {
"user": username,
"password": password,
'sendImmediately': false
},
method: method,
json: params
}
).pipe(self.c.res);