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我正在编写一个必须在网络服务上发布一些数据的应用程序。为此,我使用了该教程

“get”方法有效,但帖子无效。

网络服务代码:

[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
}

网络服务的预期应该是这样的:

以下是一个示例请求 Json 正文:

{ "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:调用我的网络服务的新方法:

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);
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1 回答 1

1

您将内容类型设置为 JSON,但您没有发布 JSON,您发布的是键值对,其中值是字符串(恰好是 JSON,但这无关紧要)。您的 Web 服务需要 JSON 正文还是表单数据?

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,并确保您正在对参数进行 URL 编码(也许 restlet 会为您执行此操作,我不确定)。

另一方面,如果您实际上只是想发布 JSON 正文,请保留 mime 类型,然后执行类似的操作,

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

另外,假设这不能解决您的问题,最好知道来自服务器的状态代码。404?400?403?假设您使用的 Web 服务返回正确的代码,它可能对找到根本原因非常有帮助。

于 2012-06-28T15:38:48.423 回答