Android Volley POST请求:在服务器端获取GET请求方法(php) [英] Android Volley POST request: getting GET request method on server side (php)
问题描述
我正在制作一个Android应用，该应用需要将Post请求发送到我的服务器，并且确实可以使用一些帮助！ 我一直在尝试使用Android Volley发出这些请求.我在这里已经阅读了许多相关的问题，以及有关android Volley的各种文档资料，但是由于我设法提出请求，因此我不可能在服务器端以正确的方式接收发布的数据，因此我一无所知我做错了什么... 我尝试使用 stringRequest 覆盖 getParams()和自定义 JsonObjectRequest ，并将数据作为参数.我在两个请求的服务器端都得到了不同的结果，但是仍然无法以正确的方式捕获它.
I am making an android app that needs to send Post requests to my server and could really use some help! I've been trying to make these requests using android Volley. I've read a lot of related questions here and all kind of documenttion sources about android Volley but as I manage to make my requests, it's been impossible for me to receive the posted data the right way on server side and I have no clue about what I'm doing wrong... I've tried with stringRequest overriding getParams() and custom JsonObjectRequest with my data as a parameter. I get diferent results on server side with both requests but I'm still not able to catch it the right way.
在服务器端，我的调试 PHP文件如下所示:
On my server side my debug PHP file goes like this:
$content = file_get_contents("php://input");
$string = 'fileGetContents: ';
$json = json_decode($content, TRUE);
$string = 'fileGetContents: ';
$string .= $content;
$string .= ' -- json encoded: ';
$string .= json_encode($json);
$string .= ' -- Request Method: ';
$string .= $_SERVER['REQUEST_METHOD'];
$string .= ' -- $_REQUEST: ';
$string .= json_encode($_REQUEST);
$string .= ' -- $_POST: ';
$string .= json_encode($_POST);
$string .= ' -- user: ';
$string .= json_encode($_POST["user"]);
$string .= ' -- $_GET: ';
$string .= json_encode($_GET);
$string .= ' -- $_FORM: ';
$string .= json_encode($_FORM);
$array["ans"] = $string;
echo json_encode($array);
由于收到的响应始终为空，因此我也尝试将请求发送到 http://httpbin.org/post ，它为我提供了有趣的信息.
and as the response I get is always empty I've also tried sending my requests to http://httpbin.org/post which gives me interesting information.
因此，我将第一个 stringRequest 设置为:
So with the first stringRequest that I make like this:
RequestQueue requestQueue = Volley.newRequestQueue(this);
StringRequest stringRequest = new StringRequest(Request.Method.POST, "myServer.com/postRequest.php",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
displayTheResponse(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(RegisterActivity.this,error.toString(),Toast.LENGTH_LONG).show();
}
}){
@Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("user", "test");
params.put("pass", "passtest");
return params;
}
};
requestQueue.add(stringRequest);
我从服务器上得到了这个答案:
I get this answer from my server:
{"ans":"fileGetContents: -- json encoded: null -- Request Method: GET -- $_REQUEST: [] -- $_POST: [] -- user: null -- $_GET: []"}
从httpbin.org我得到:
And from httpbin.org i get:
{ "args": {},
"data": "",
"files": {},
"form": { "pass": "passtest", "user": "test" },
"headers": { "Accept-Encoding": "gzip", "Content-Length": "24", "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8", "Host": "httpbin.org", "User-Agent": "Dalvik/2.1.0 (Linux; U; Android 7.1; Android SDK built for x86 Build/NPF26K)" },
"json": null,
"origin": "104.221.22.144",
"url": "http://httpbin.org/post"
}
我可以看到信息实际上是发送的，但不是作为POST数据接收的，而是作为Form数据接收的，我实际上并不知道它是什么或如何从PHP接收它...
I can see that the information is actually sent but not received as POST data but as Form data which I don't really know what it is or how to receive it from PHP...
然后在我的第二个 JsonObjectRequest 中，如下所示:
Then in my second JsonObjectRequest that goes like this:
Map<String, String> jsonParams = new HashMap<String, String>();
jsonParams.put("user", "test");
JsonObjectRequest myRequest = new JsonObjectRequest(
Request.Method.POST,
"myServer.com/postTest.php",
new JSONObject(jsonParams),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
displayResponse(response.toString(4));
} catch (JSONException e) {
e.printStackTrace();
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(LogInActivity.this, "Error "+error.getMessage(), Toast.LENGTH_LONG).show();
fm.popBackStack();
}
});
requestQueue.add(myRequest);
从httpbin.org我得到:
From httpbin.org I get:
{ "args": {},
"data": "{\"user\":\"test\"}",
"files": {},
"form": {},
"headers": { "Accept-Encoding": "gzip", "Content-Length": "15", "Content-Type": "application\/json; charset=utf-8", "Host": "httpbin.org", "User-Agent": "Dalvik\/2.1.0 (Linux; U; Android 7.1; Android SDK built for x86 Build\/NPF26K)" },
"json": { "user": "test" },
"origin": "104.221.22.144",
"url": "http:\/\/httpbin.org\/post"
}
在这里我们看到数据现在显示在数据"和"json"中，而不是在窗体"中，但是从我的服务器上我仍然得到相同的空响应，所以我认为我的问题来自服务器端PHP代码我正在使用.我还注意到"$ _SERVER ['REQUEST_METHOD']"返回"GET".
and here we see that now the data is shown in "data" and "json" instead of in "form" but from my server I still get the same empty response so I gess my problem comes from the server side PHP code I'm using. I also note that "$_SERVER['REQUEST_METHOD']" is returning "GET".
我已经尝试了许多不同的方式来提出我的Volley请求，但是我不知道该怎么办.我尝试创建一个帮助器类，自定义JsonObjectRequest，重写getHeaders()，甚至使用AppController将请求添加到队列中……我想我对Post请求的工作方式还没有足够的了解，我是一个很新的人android develloping.
I've tried a lot of diferent ways to make my Volley request but I don't know what else to do. I've tried creating a helper class, custom JsonObjectRequest, overriding getHeaders(), even adding the request to the queue with the AppController... I guess I don't have enough understanding onhow the Post requests work, I'm pretty new with android develloping.
如果能帮助我了解如何使用Volley POST方法在服务器端接收数据，我将非常感激.非常感谢您的宝贵时间！
I would really be so grateful for any help to understand how am I supposed to receive my data on server side with the Volley POST method. Thank you very much for your time!
推荐答案
以下是可用于通过android中的 Volley库发出 POST 请求的代码.假设您将库这样导入您的应用程序build.gradle文件中:
Here is code you can use to make a POST request with the Volley library in android. Assuming you import your library as such in your application build.gradle file:
dependencies{
....
implementation 'com.android.volley:volley:1.1.0'
.....
}
下面的代码可以作为执行您的POST请求的一些常规任务放在方法中
The following code can be put in a method as some routine task to perform your POST request
String requestUrl = "http://myapi.com/api/postresource.php";
StringRequest stringRequest = new StringRequest(Request.Method.POST, requestUrl, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.e("Volley Result", ""+response); //the response contains the result from the server, a json string or any other object returned by your server
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace(); //log the error resulting from the request for diagnosis/debugging
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> postMap = new HashMap<>();
postMap.put("param1", "value1");
postMap.put("param2", value2);
//..... Add as many key value pairs in the map as necessary for your request
return postMap;
}
};
//make the request to your server as indicated in your request url
Volley.newRequestQueue(getContext()).add(stringRequest);
这篇关于Android Volley POST请求:在服务器端获取GET请求方法(php)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！
