Java: HTTP Post to create new “Ride” in a Ruby on Rails application
-
16-09-2019 - |
Question
My question is very similar to Java: HTTP Post to create new "Product" in a Ruby on Rails application
I have a form that I want to "post" to a form that looks like this
Offer:<br />
<input id="ride_togive" name="ride[togive]" size="30" type="text" />
</p>
<p>
Request for Offer:<br />
<input id="ride_totake" name="ride[totake]" size="30" type="text" />
</p>
My Java code looks like this
DefaultHttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("http://172.16.60.129:3000/rides");
// Configure the form parameters
List <NameValuePair> nvps = new ArrayList <NameValuePair>();
nvps.add(new BasicNameValuePair("ride_totake", "Ride to Vail"));
nvps.add(new BasicNameValuePair("ride_togive", "$20"));
post.addHeader("Content-Type","application/json");
try {
post.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HttpResponse response = null;
try {
response = client.execute(post);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HttpEntity entity = response.getEntity();
System.out.println("form get: " + response.getStatusLine());
if (entity != null) {
try {
entity.consumeContent();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Here is the output of the RoR console
Processing RidesController#create (for 172.16.60.1 at 2009-11-04 22:22:52) [POST]
Parameters: {"_json"=>"totake=Ride+to+Vail&togive=%2420"}
Ride Columns (0.6ms) SHOW FIELDS FROM `rides`
SQL (0.1ms) BEGIN
Ride Create (0.3ms) INSERT INTO `rides` (`isoffer`, `togive`, `howlong`, `updated_at`, `totake`, `created_at`)
VALUES(NULL, NULL, 0, '2009-11-05 05:22:52', NULL, '2009-11-05 05:22:52')
SQL (0.0ms) COMMIT
Redirected to http://172.16.60.129:3000/rides
Completed in 9ms (DB: 1) | 302 Found [http://172.16.60.129/rides]
I guess my real question is how should I be addressing the RoR variables in Java?
Solution
Use the name instead of the id in your html input tags. In your example, they are "ride[togive]" and "ride[totake]".
Sample Java code that works on my RoR project. Use HttpClient 3.1
PostMethod post = new PostMethod("http://localhost:3000/projects");
NameValuePair[] data = {
new NameValuePair("project[name]", "from java"),
new NameValuePair("project[life_cycle_id]", "5")
};
post.setRequestBody(data);
// execute method and handle any error responses.
new HttpClient().executeMethod(post);
From RoR Console:
Processing ProjectsController#create (for 127.0.0.1 at 2009-11-04 22:07:39) [POS
T]
Parameters: {"project"=>{"name"=>"from java", "life_cycle_id"=>"5"}}
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