Question

I have a very simple scenario which I cannot get to work. I am trying to POST a JSON string to a RESTful endoint using cURL to sent the request over HTTPS and RESTeasy on the server.

My cURL POST is configured thusly:

$ch = curl_init();

$content = json_encode($validJsonString);

curl_setopt($ch, CURLOPT_URL, 'https://foobar.com/test?trackingId=12345');
curl_setopt($ch, CURLOPT_POSTFIELDS, array('json' => $content));
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);

$headers = array( 
    'Content-Type: application/json',
    'Content-Length: ' . strlen($content)
);

curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$response = curl_exec ($ch);

$httpResponseCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

$json = json_decode($response);
curl_close ($ch);

return $json;

And the RESTeasy recipiant looks like:

@POST
@Path("/test")
@Produces("application/json")
public String addObjectCommentAsJSON(   @FormParam("json") String validJsonString, 
                                        @QueryParam("trackingId") String trackingId) {
    Gson gson = new Gson();
    SomeObject someObject = gson.fromJson(validJsonString, SomeObject.class);
    String responseString = methodThatReturnsAJsonString(trackingId, someObject);
    return responseString;
}

This issue I am having is that the request hangs for about 30 seconds and then returns a HTTP 100 response. I understand that HTTP 100 means continue with the remainder of the request but I don’t understand how I am supposed to do that.

I tried to remove the Content-Length header but obviously I get a 411 (needs content length) so that’s not an option either.

Is it an issue with the content type perhaps? Any help is much appreciated.

Answer 1

Ok so thanks to @cbuckley and @abraham’s suggestions in their comments I have been able to work through the issues. This is what I needed to do:

1-> Change the contents of the POST body so instead of curl_setopt($ch, CURLOPT_POSTFIELDS, array('json' => $content)); I now have curl_setopt($ch, CURLOPT_POSTFIELDS,json_encode($validJsonString));

2-> I created a custom @Provider which parsed a JSON string to a Java POJO with the same structure:

@Provider
public class SomeObjectProvider implements StringConverter<SomeObject> {

    private final Gson gson = new Gson();
    public SomeObject fromString(String s) {
        return gson.fromJson(s, SomeObject.class);
    }

    public String toString(SomeObject someObject) {
        return gson.toJson(SomeObject);
    } 
}

3-> Finally the structure of the recipient method has to change slightly:

@POST
@Path("/test")
@Produces("application/json")
public String addObjectCommentAsJSON(SomeObject someObject,
                                     @QueryParam("trackingId") String trackingId) {
    String responseString = methodThatReturnsAJsonString(trackingId, someObject);
    return responseString;
}

And that all flowed through nicely.