Making a `REST` call to `graphql` endpoint using apache `httpclient` in java

Question

I am trying to make a simple rest call to graphql endpoint but getting a 400 error from the server. Have been struck in this for a while.

Payload

query = "{\n" +
            "   lookup(dob: \"01/01\", preSsn : { ssn: \"{actualvalue}\"})\n" +
            "   {\n" +
            "       items {\n" +
            "           individualCrdNumber\n" +
            "           firstName\n" +
            "           middleName\n" +
            "           lastName\n" +
            "           suffixName\n" +
            "       }\n" +
            "   }\n" +
            "}";

Error message: {"statusCode":400,"statusDescription":"Bad Request","message":"","messageDetails":[]}

Code:

    HttpClient client = getHttpsClient();
    HttpPost httpPost = new HttpPost(URL);
    StringEntity input = new StringEntity(query, ContentType.APPLICATION_JSON);
    httpPost.setEntity(input);
    final String plainCred = "userName"+":"+"password";
    final String base64Creds = Base64.getEncoder().encodeToString(plainCred.getBytes());


    httpPost.addHeader("Authorization", "Basic " + base64Creds);
    httpPost.addHeader("Content-Type", "application/json");
    httpPost.addHeader("Accept", "application/json");
    httpPost.addHeader("Cache-Control", "no-cache");

    HttpResponse response = client.execute(httpPost);

Dave L. · Accepted Answer · 2021-03-02 14:27:32Z

0

The query needs to be wrapped in an object assigned to a query element. This object can also contain a variables element for value binding:

{
  "query": "...",
  "operationName": "...",
  "variables": { "myVariable": "someValue", ... }
}

See the spec regarding GraphQL over HTTP using POST.

Try

String query = 
        "{" +
          "\"query\" : \"query {"+ 
            "lookup(dob: \"01/01\", preSsn : { ssn: \"{actualvalue}\"})" +
            "{items{individualCrdNumber firstName middleName lastName suffixName}}" +
          "}" +
        "}";

edited Mar 2, 2021 at 14:27

answered Mar 2, 2021 at 14:19

Dave L.

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1 Comment

abhi Over a year ago

I tried the option you suggested, and it worked. thanks!

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