从Delphi客户端将JSON数据发布到RESTful Datasnap服务器 [英] Post JSON data to RESTful datasnap server from delphi client

问题描述

我需要将一个简单的JSON对象从Delphi客户端发送到Restful数据快照服务器（Delphi）。我正在使用Delphi XE。有人可以帮我解决代码问题吗？我正在尝试几个小时，但没有得到..请询问详细信息是否不够

I need to send a simple JSON object to a Restful datasnap server (Delphi) from a Delphi client. I am using Delphi XE. Can anybody help me out with the code? I am trying for hours but not getting it.. Please ask if details are not sufficient

编辑：
这是服务器端方法声明：

Here is server side method declaration:

procedure updatemethodnme(str:string):string;

这是客户端代码：

function PostData(request: string): boolean;
var
param: TStringList;
url, Text,str: string;
code: Integer;
http: TIDHttp;
begin
Result:= false;
http:= TIDHttp.Create(nil);
http.HandleRedirects:= true;
http.ReadTimeout:= 50000;
http.request.Connection:= 'keep-alive';
str:= '{"lamp":"'+lamp+'","floor":"'+floor+'","op":"'+request+'"}';
param:= TStringList.Create;
param.Clear;
param.Add(str);
url:= 'h***p://xx2.168.xx.xx:xxxx/Datasnap/rest/TserverMethods1/methdname/';
try
Text:= http.Post(url, param);
Result:= true;
except on E: Exception do
begin
Result := false;
end;
end;
end;

推荐答案

下面是一些简单的XE2测试代码，可通过HTTP发送JSON数据使用SuperObject发布（使用Indy的 TIdHTTP ）：

Here's some simple XE2 test code sending JSON data through HTTP Post using SuperObject (using Indy's TIdHTTP):

procedure TFrmTTWebserviceTester.Button1Click(Sender: TObject);
var
  lJSO : ISuperObject;
  lRequest: TStringStream;
  lResponse: String;
begin
  // Next 2 lines for Fiddler HTTP intercept:
  IdHTTP.ProxyParams.ProxyServer := '127.0.0.1';
  IdHTTP.ProxyParams.ProxyPort := 8888;
  lJSO := SO('{"name": "Henri Gourvest", "vip": true, "telephones": ["000000000", "111111111111"], "age": 33, "size": 1.83, "adresses": [ { "adress": "blabla", "city": "Metz", "pc": 57000 }, { "adress": "blabla", "city": "Nantes", "pc": 44000 } ]}');
  lRequest := TStringStream.Create(lJSO.AsString, TEncoding.UTF8);
  try
    IdHTTP.Request.ContentType := 'application/json';
    IdHTTP.Request.Charset := 'utf-8';
    try
      lResponse := IdHTTP.Post('http://127.0.0.1:8085/ttposttest', lRequest);
      ShowMessage(lResponse);
    except
      on E: Exception do
        ShowMessage('Error on request:'#13#10 + E.Message);
    end;
  finally
    lRequest.Free;
  end;
  lJSO := nil;
end;

这是输出的数据：

POST http://127.0.0.1:8085/ttposttest HTTP/1.0
Content-Type: application/json; charset=utf-8
Content-Length: 204
Connection: keep-alive
Host: 127.0.0.1:8085
Accept: text/html, */*
Accept-Encoding: identity
User-Agent: Mozilla/3.0 (compatible; Indy Library)

{"vip":true,"age":33,"telephones":["000000000","111111111111"],"adresses":[{"adress":"blabla","pc":57000,"city":"Metz"},{"adress":"blabla","pc":44000,"city":"Nantes"}],"size":1.83,"name":"Henri Gourvest"}

接收器是 TWebModule 上的 TWebAction ，具有处理程序：

Receiver is a TWebAction on a TWebModule, with handler:

procedure TWebModuleWebServices.WebModuleWebServicesTTPostTestAction(
  Sender: TObject; Request: TWebRequest; Response: TWebResponse;
  var Handled: Boolean);
var
  S   : String;
  lJSO: ISuperObject;
begin
  S := Request.Content;
  if S <> '' then
    lJSO := SO('{"result": "OK", "encodingtestcharacters": "Typed € with Alt-0128 Will be escaped to \u20ac"}')
  else
    lJSO := SO('{"result": "Error", "message": "No data received"}');
  Response.ContentType := 'application/json';  // Designating the encoding is somewhat redundant for JSON (http://stackoverflow.com/questions/9254891/what-does-content-type-application-json-charset-utf-8-really-mean)
  Response.Charset := 'utf-8';
  Response.Content := lJSO.AsJSON;
  Handled := true;
end; { WebModuleWebServicesTTPostTestAction }

它使用 TIdHTTPWebBrokerBridge ：

FWebBrokerBridge := TIdHTTPWebBrokerBridge.Create(Self);
// Register web module class.
FWebBrokerBridge.RegisterWebModuleClass(TWebModuleWebServices);
// Settings:
FWebBrokerBridge.DefaultPort := 8085;        

这是实际的响应：

HTTP/1.1 200 OK
Connection: close
Content-Type: application/json; charset=utf-8
Content-Length: 92

{"encodingtestcharacters":"Typed\u20acwithAlt0128FollowedBy8364escaped\u8364","result":"OK"}

这篇关于从Delphi客户端将JSON数据发布到RESTful Datasnap服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！