我正在尝试向我的API发出POST
请求,它在Postman
中工作(我获得了一个有效的JSON对象),但没有使用Volley
。使用以下代码:
String URL = "http://somename/token";
RequestQueue queue = Volley.newRequestQueue(StartActivity.this);
queue.add(new JsonObjectRequest(Method.POST, URL, null,
new Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
// handle response
Log.i("StartActivity", response.toString());
}
}, new ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// handle error
Log.i("StartActivity", error.toString());
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("username", "someUsername");
headers.put("password", "somePassword");
headers.put("Authorization", "Basic someCodeHere");
return headers;
}
@Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("grant_type", "client_credentials");
return params;
}
});
我收到以下错误:
02-12 21:42:54.774: E/Volley(19215): [46574] BasicNetwork.performRequest: Unexpected response code 400 for http://somename/token/
我看过很多例子,我真的没看到这里出了什么问题。任何人都有任何想法?
我使用此方法更新了代码:
HashMap<String, String> createBasicAuthHeader(String username, String password) {
HashMap<String, String> headerMap = new HashMap<String, String>();
String credentials = username + ":" + password;
String base64EncodedCredentials =
Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP);
headerMap.put("Authorization", "Basic " + base64EncodedCredentials);
return headerMap;
}
并将getHeaders()
更改为:
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return createBasicAuthHeader("username", "password");
}
仍然得到同样的错误!
答案 0 :(得分:18)
我有同样的问题,我从标题中删除了:
headers.put("Content-Type", "application/json");
现在它很棒!
答案 1 :(得分:8)
如果要将json值传递给body(raw json)。不需要将内容类型设置为headers.put(&#34; Content-Type&#34;,&#34; application / json; charset = UTF-8&#34);
当我在标题回调中使用内容类型时,我在logcat中获得了400响应状态。我评论了headers.put(&#34; Content-Type&#34;,&#34; application / json; charset = UTF-8&#34);因为我正在传递原始json在身体,同时调用api.screenshot为postman附加。它将帮助
private void volleyCall(String email, String password) {
RequestQueue queue= Volley.newRequestQueue(this);
String URL = "http://XXXX.in:8080/XXXX/api/userService/login";
Map<String, String> jsonParams = new HashMap<S[enter image description here][1]tring, String>();
jsonParams.put("email", email);
jsonParams.put("password", password);
Log.d(TAG,"Json:"+ new JSONObject(jsonParams));
JsonObjectRequest postRequest = new JsonObjectRequest( Request.Method.POST, URL,new JSONObject(jsonParams),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG,"Json"+ response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// Handle Error
Log.d(TAG, "Error: " + error
+ "\nStatus Code " + error.networkResponse.statusCode
+ "\nResponse Data " + error.networkResponse.data
+ "\nCause " + error.getCause()
+ "\nmessage" + error.getMessage());
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String,String>();
// headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
@Override
public String getBodyContentType() {
return "application/json";
}
};
queue.add(postRequest);
}
LogCat:
LoginActivity: Json:{"email":"XXXXXX@gmail.com","password":"abcde"}
LoginActivity: Error: com.android.volley.ServerError
Status Code 400
Response Data [B@63ca992
Cause null
messagenull
答案 2 :(得分:4)
400错误是因为Content-Type设置错误。 请执行以下操作。
GetHeader函数应为
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> param = new HashMap<String, String>();
return param;
}
添加此新覆盖功能。
@Override
public String getBodyContentType() {
return "application/json";
}
答案 3 :(得分:3)
400表示错误请求,可能您在标题上遗漏了Content-Type=application/json
答案 4 :(得分:1)
之前我遇到过同样的问题,我在项目中得到了解决方案:
RequestQueue requestManager = Volley.newRequestQueue(this);
String requestURL = "http://www.mywebsite.org";
Listener<String> jsonListerner = new Response.Listener<String>() {
@Override
public void onResponse(String list) {
}
};
ErrorListener errorListener = new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.w("Volley Error", error.getMessage());
}
};
StringRequest fileRequest = new StringRequest(Request.Method.POST, requestURL, jsonListerner,errorListener){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String,String> params = new HashMap<String, String>();
params.put("token", account.getToken());
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
// do not add anything here
return headers;
}
};
requestManager.add(fileRequest);
在上面的代码片段中,我使用了Post Method:
我的答案基于我的经验,所以请注意:
1。)使用POST方法时使用&#34; StringRequest&#34;而不是&#34; JsonObjectRequest&#34;
2。)getHeaders内部使用Empty HashMap覆盖值
example snippet:
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String,String> params = new HashMap<String, String>();
params.put("token", account.getToken());
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
// do not add anything here
return headers;
}
一切都适用于我的情况。
答案 5 :(得分:1)
我发现了这个错误,现在我已经修好了。我做了this link中所说的。你需要做的是
if (statusCode < 200 || statusCode > 299) {
throw new IOException();
}
与
if (statusCode < 200 || statusCode > 405) {
throw new IOException();
}
希望这有帮助。
答案 6 :(得分:0)
我删除了这个params.put(“Content-Type”,“application / x-www-form-urlencoded”);
这是我的代码更改。
@Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
if(!isLogout) {
params.put("username", username);
params.put("password", password);
params.put("grant_type", "password");
} else {
}
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String,String> params = new HashMap<String, String>();
if(isLogout) {
params.put("Authorization", "bearer "+LibraryDataModel.getToken());
}else {
// Removed this line
// params.put("Content-Type", "application/x-www-form-urlencoded");
}
return params;
}
答案 7 :(得分:0)
在Android 2.3中,使用Base64.encodeToString()时出现问题,因为它在HTTP标头中引入了一个新行。请参阅我的回复mongodb converting isodate to numerical value。
简短回答:不要使用Base64.encodeToString(),而是将已编码的字符串放在那里。
答案 8 :(得分:0)
我找到了一个解决方案,如果你使用postman来命中api并且你的api已经定义了类似skill = serializers.JSONField()的序列化器字段,那么那种类型的错误发生了 -
POSTMAN解决方案 - 你只需在JSONField中添加binary = True ex- skill = serializers.JSONField(binary = True)
Android或其他客户的解决方案然后 - 你只需删除JSONField中的binary = True ex- skill = serializers.JSONField()
答案 9 :(得分:0)
有时此错误400是由于请求类型引起的,因此您需要将Request.Method.GET
更改为Request.Method.POST
,然后它像一个超级按钮一样起作用。
答案 10 :(得分:-1)
检查您是否使用了正确的SDK
对于Android Studio / IntelliJIDEA:
File -> Project Structure -> Project -> Project SDK
Modules -> Check each modules "Module SDK"
最好使用&#34; Google API(x.x)&#34;而不是Android API