发布android,无法联系Web服务

时间:2012-06-28 15:28:39

标签: android wcf wcf-rest

我正在撰写一个必须在网络服务上发布一些数据的应用。 为此,我使用了that tutorial

方法“get”正在运行,但不是帖子。

Webservice代码:

[OperationContract]
[WebInvoke(Method = "POST",
ResponseFormat = WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json,
UriTemplate = "picture")]
public void UploadPicture(RReport report)
{
    if(report == null)
        throw new WebFaultException<string>("Bad parameter", HttpStatusCode.BadRequest);

    //other stuff
}

Web服务的期望应该是:

  

以下是Json正文的示例请求:

     

{“PictureBase64”:“字符串内容”}

现在是android部分:

//Localhost URI
String url = "http://10.0.2.2:51136/API/picture";
RestClient client = new RestClient(url);
try {
    Report r = new Report("ok");

    //Convert in json
    String report = new Gson().toJson(r);
    //What shows the log => {"PictureBase64":"ok"}
    Log.i("Json", report);
    //Add the param
    client.AddParam("report", report);

    //set the header
    client.AddHeader("Content-Type","application/json");
    client.Execute(RequestMethod.POST);
} catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

 String response = client.getResponse();
 Log.i("Response", response);

现在来自android部分的错误:

?<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>Request Error</title>
        <style>BODY { color: #000000; background-color: white; font-family: Verdana; margin-left: 0px; margin-top: 0px; } #content { margin-left: 30px; font-size: .70em; padding-bottom: 2em; } A:link { color: #336699; font-weight: bold; text-decoration: underline; } A:visited { color: #6699cc; font-weight: bold; text-decoration: underline; } A:active { color: #336699; font-weight: bold; text-decoration: underline; } .heading1 { background-color: #003366; border-bottom: #336699 6px solid; color: #ffffff; font-family: Tahoma; font-size: 26px; font-weight: normal;margin: 0em 0em 10px -20px; padding-bottom: 8px; padding-left: 30px;padding-top: 16px;} pre { font-size:small; background-color: #e5e5cc; padding: 5px; font-family: Courier New; margin-top: 0px; border: 1px #f0f0e0 solid; white-space: pre-wrap; white-space: -pre-wrap; word-wrap: break-word; } table { border-collapse: collapse; border-spacing: 0px; font-family: Verdana;} table th { border-right: 2px white solid; border-bottom: 2px white solid; font-weight: bold; background-color: #cecf9c;} table td { border-right: 2px white solid; border-bottom: 2px white solid; background-color: #e5e5cc;}</style>
    </head>
    <body>
        <div id="content">
        <p class="heading1">Request Error</p>
        <p xmlns="">The server encountered an error processing the request. Please see the <a rel="help-page" href="http://10.0.2.2:51136/API/help">service help page</a> for constructing valid requests to the service.</p>
        </div>
    </body>
</html>

编辑: 调用我的web服务的新方法:

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost(myWebservice);

StringEntity input = new StringEntity(myJson);
input.setContentType("application/json");
postRequest.setEntity(input);

HttpResponse response = httpClient.execute(postRequest);

1 个答案:

答案 0 :(得分:1)

您正在将内容类型设置为JSON,但您没有发布JSON,您正在发布键值对,其中值是一个字符串(恰好是JSON,但不相关)。您的Web服务是否需要JSON正文或表单数据?

假设您要发布参数而不是JSON正文,请将您的mime类型设置为:application/x-www-form-urlencoded,并确保您对参数进行URL编码(也许restlet会为您执行此操作,我不是肯定)。

另一方面,如果您实际上只想发布一个JSON正文,请保持mime类型不变,并执行类似的操作,

StringRepresentation sr = new StringRepresentation(myJsonString);
Representation rep = client.post();

另外,假设这不能解决您的问题,最好知道服务器的状态代码。 404? 400? 403?假设您正在使用的Web服务返回正确的代码,它可能非常有助于找到根本原因。