Hi RPB,
Thanks for the links. There is a lot of good info in there. I don't
think my issue is with SOP though. There is something wacky about
what I am doing this time and I am not seeing it.
So, here is a more complete description of my environment: my
development platform is a recent Ubuntu distro with eclipse 3.4.2
and GWT 1.7.1. The target platform is running RHEL 5.4 and Apache-2.
I have changed/rewritten the code several times today and nothing
is working. The section of the GWT code that should take in the JSON
data now looks like:
public void getInfo() {
RequestBuilder req;
LOG("getInfo:a");
req = new RequestBuilder(RequestBuilder.POST,
URL.encode(baseURL + "archive.cgi"));
LOG("getInfo:a1");
req.setHeader("Content-Type",
"application/x-www-form-urlencoded");
LOG("getInfo:a3");
try {
req.sendRequest(null, new RequestCallback() {
public void onError(Request request, Throwable e) {
Window.alert("getInfo failed: " + e.toString());
}
public void onResponseReceived(Request request,
Response response) {
JSONObject Info;
if (response.getStatusCode() == 200) {
try {
LOG("getInfo:onResponseReceived:a:" +
response.getText());
Info = JSONParser.parse(response.getText()
).isObject
();
}
catch (NullPointerException e) {
LOG("getInfo:onResponseReceived:e1:"+
e.getMessage());
throw new RuntimeException(
"Failed to send JSON
request");
}
catch(IllegalArgumentException e) {
LOG("getInfo:onResponseReceived:e2:"+
e.getMessage());
throw new RuntimeException(
"Failed to send JSON
request");
}
catch(Exception e) {
LOG("getInfo:onResponseReceived:e3:"+
e.getMessage());
throw new RuntimeException(
"Failed to send JSON
request");
}
LOG("getInfo:onResponseReceived:b");
if (Info == null) {
throw new RuntimeException(
"Get info returned
null");
}
LOG("getInfo:onResponseReceived:c");
refreshList(Info);
LOG("getInfo:onResponseReceived:d");
} else {
LOG("getInfo:onResponseReceived:f:"+
response.getStatusText());
}
}
});
} catch (RequestException e) {
// TODO Auto-generated catch block
LOG("getInfo:b"+e.getMessage());
}
LOG("getInfo:a4");
}
A valid URL to point this to is:
http://apache-dev.itg.beckman.illinois.edu/communications/forum2/archive.cgi
the "LOG()" call are going to a JSNI method that calls "console.log()"
for FireBug.
At this instant the sendRequest() method is not being fired at all.
I have used sendRequest with null, empty ("") and dummy data values
("dummy=dummy"). I have tried to use the send() method instead of
sendRequest() and have tried the setRequestData() method with send().
I have added and removed various header arguments to set the encoding
and the "Accept" pragmas in this code and in my CGI script. I have
had both expect content-types of:
text/plain
text/javascript
application/javascript
application/json
I have set the request type above to both GET and POST.
I have set a request header to:
req.setHeader("Content-Type", "application/x-www-form-
urlencoded");
I have deleted the resulting "source" dir in the war directory.
many hours ago FireBug would show a connection in the console with
a return status of 200 but an "error" icon as well. You could see
request and response headers but no JSON payload. You could open
the request in another browser and see the JSON string. You could
point your browser to the archive.cgi URL and see the JSON string
but RequestBuilder does not seem to be actually sucking the data in.
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