我正在尝试使用Retrofit2库从android应用发送数据(POST请求),并在用nodejs(使用express框架)编写的服务器上接收它,但我无法检索从应用程序。
我在GsonConverterfactory上进行了改造,并向“ / temp”路由发送了POST请求。
var express = require("express");
var bodyParser = require("body-parser");
var app = express();
app.use(bodyParser.urlencoded({extended:true}));
app.use('/public',express.static('public'));
app.post("/temp",function(req,res){
console.log(req.body);
obj = {
orgName : "Got the message ",
address : "on the server"
}
res.json(obj);
})
app.listen(8000,function(){
console.log("Server Started at port 8000");
})
package com.example.myapplication;
public class Shop {
private String orgName;
private String address;
public Shop(String orgName, String address) {
this.orgName = orgName;
this.address = address;
}
public String getOrgName() {
return orgName;
}
public String getAddress() {
return address;
}
}
package com.example.myapplication;
import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.POST;
public interface ShopApi {
@POST("temp")
Call<Shop> create(@Body Shop shop);
}
public void postData(View view){
String BASE_URL = "http://10.0.2.2:8000/";
String org = orgName.getText().toString();
String address = add.getText().toString();
//Toast.makeText(getApplicationContext(),org+" "+address,Toast.LENGTH_SHORT).show();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
ShopApi shopApi = retrofit.create(ShopApi.class);
Shop shop = new Shop(org,address);
Call<Shop> shopCall = shopApi.create(shop);
shopCall.enqueue(new Callback<Shop>() {
@Override
public void onResponse(Call<Shop> call, Response<Shop> response) {
if(!response.isSuccessful()){
Toast.makeText(getApplicationContext(),response.code(),Toast.LENGTH_LONG).show();
}
Shop shopResponse = response.body();
String content = shopResponse.getOrgName() + shopResponse.getAddress();
Toast.makeText(getApplicationContext(),content,Toast.LENGTH_SHORT).show();
}
@Override
public void onFailure(Call<Shop> call, Throwable t) {
Toast.makeText(getApplicationContext(),t.getMessage(),Toast.LENGTH_SHORT).show();
}
});
}
req.body中应该有一个json对象,该对象应该在终端中打印,但是会打印出来:-
Server Started at port 8000
{}
请帮助我检索服务器上的数据。
答案 0 :(得分:0)
我不在Node.js中工作,但我仍然尝试回答您的问题。
您期望服务器中有一个JSON对象,如下所示,
{
"orgName": "Organization name",
"address": "Organization address"
}
好的,您的Android部件(Retrofit api接口)是正确的。在运行时,它将生成预期的JSON对象。但是,在服务器端,您正在接受application/x-www-form-urlencoded
而不是application/json
数据。这是导致此问题的IMO。
只需替换
中的以下代码app.use(bodyParser.urlencoded({extended:true}));
到
app.use(bodyParser.json());
尝试一下!
body-parser doc