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POConsume a WCF web service with Post Params with Android
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  1. POConsume a WCF web service with Post Params with Android
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    copied!<p>I work with a android device which use a WCF web service.</p> <p>I managed to get a JSON message from WCF, send a file but I didn't manage to send POST params to the WCF service. My goal is to have somethink like this (Or get an object and then deserialize the JSON). (User is a complex object composed of basically String and Integer)</p> <pre><code>[OperationContract] [WebInvoke( Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, UriTemplate = "interventions")] public void SendInterventions(List&lt;User&gt; user) { } </code></pre> <p>As explained on <a href="http://debugmode.net/2011/05/15/wcf-rest-service-with-josn-data/" rel="nofollow noreferrer">http://debugmode.net/2011/05/15/wcf-rest-service-with-josn-data/</a></p> <p>I used the HTTP Post code like : <a href="http://www.softwarepassion.com/android-series-get-post-and-multipart-post-requests/" rel="nofollow noreferrer">http://www.softwarepassion.com/android-series-get-post-and-multipart-post-requests/</a></p> <p>My first try was very simple, I wanted to send a simple string post param but it doesn't work.</p> <pre><code>HttpClient client = new DefaultHttpClient(); List&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;(); params.add(new BasicNameValuePair("user", "kris")); UrlEncodedFormEntity ent = new UrlEncodedFormEntity(params, HTTP.UTF_8); HttpPost post = new HttpPost(url); post.setEntity(ent); HttpResponse response = client.execute(post); HttpEntity resEntity = response.getEntity(); </code></pre> <p>And the .Net code</p> <pre><code>[OperationContract] [WebInvoke( Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, UriTemplate = "interventions")] public void SendInterventions(String user) { } </code></pre> <p>Does someone has a good example or somes tips ?</p> <p>Regards and thanks</p> <p><strong>Edit</strong></p> <p>Well I switch on the error reporting in asp .net wcf.</p> <pre><code>01-22 11:49:46.800: D/SendInterventions(2049): &lt;Fault xmlns="http://schemas.microsoft.com/ws/2005/05/envelope/none"&gt; &lt;Code&gt;&lt;Value&gt;Receiver&lt;/Value&gt; &lt;Subcode&gt;&lt;Value xmlns:a="http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher"&gt;a:InternalServiceFault&lt;/Value&gt;&lt;/Subcode&gt; &lt;/Code&gt;&lt;Reason&gt; &lt;Text xml:lang="fr-FR"&gt;Le message entrant a un format inattendu 'Raw'. Les formats de message attendus pour l'opération sont 'Xml'; 'Json'. Un WebContentTypeMapper n'a peut-être pas été configuré sur la liaison. Pour plus d'informations, consultez la documentation relative à WebContentTypeMapper.&lt;/Text&gt; &lt;/Reason&gt;&lt;Detail&gt;&lt;ExceptionDetail xmlns="http://schemas.datacontract.org/2004/07/System.ServiceModel" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"&gt;&lt;HelpLink i:nil="true"/&gt;&lt;InnerException i:nil="true"/&gt; &lt;Message&gt;Le message entrant a un format inattendu 'Raw'. Les formats de message attendus pour l'opération sont 'Xml'; 'Json'. Un WebContentTypeMapper n'a peut-être pas été configuré sur la liaison. Pour plus d'informations, consultez la documentation relative à WebContentTypeMapper.&lt;/Message&gt; &lt;StackTrace&gt; à System.ServiceModel.Dispatcher.DemultiplexingDispatchMessageFormatter.DeserializeRequest(Message message, Object[] parameters)&amp;#xD; </code></pre> <p><strong>Edit 2</strong></p> <p>I had this error </p> <pre><code>01-22 12:28:06.830: W/System.err(2496): java.lang.IllegalStateException: Content has been consumed </code></pre> <p>I googled it and I saw that page : <a href="https://stackoverflow.com/questions/6028981/using-httpclient-and-httppost-in-android-with-post-parameters">Using HttpClient and HttpPost in Android with post parameters</a></p> <p>I modified the code and add httpPost.setHeader("Accept", "application/json");</p> <p>and then magic it entered in the asp .net method but there is a drawback (Although the IllegalStateException stay but it is less important)</p> <p>It only enter in the method when the method is :</p> <pre><code>public void SendInterventions(object user) </code></pre> <p>and not :</p> <pre><code>public void SendInterventions(String user) </code></pre> <p>and I can do nothing with that object (can't be casted to String for example) and if I rename the user parameter it won't work either. (so we can admit that the json query is parsed because he can detect the user parameter)</p> <p>I tryied another code :</p> <pre><code>JSONObject jsonObj = new JSONObject(); jsonObj.put("user", "test"); StringEntity entity = new StringEntity(jsonObj.toString(), HTTP.UTF_8); entity.setContentType("application/json"); post.setEntity(entity); </code></pre> <p>same effect .. :( any idea ?</p> <p><strong>Edit 3</strong></p> <p>Well I found another very interesting page on <a href="https://stackoverflow.com/questions/6835872/wcf-rest-post-of-json-parameter-is-empty">WCF REST POST of JSON: Parameter is empty</a></p> <p>IF I modify the WebInvoke like :</p> <pre><code>[WebInvoke( RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest, UriTemplate = "interventions")] </code></pre> <p>(The BodyStyle parameter was missing, I hope I can send complex json data with that method)</p>
 

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