Poignée de réponse du serveur dans Android
https://stackoverflow.com/questions/8381896
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28-10-2019 - |
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Dans ma demande, je l'extraction de données à l'aide webservices.But lorsque le serveur est en panne ou non dans l'état actif, il donne le code de réponse 500 et ma proximité de force d'application.
S'il vous plaît me guider comment gérer cette condition dans ma sortie application.Le logcat est indiqué ci-dessous:
12-05 12:17:22.337: V/response code(950): 500
12-05 12:17:22.347: W/System.err(950): org.json.JSONException: A JSONArray text must start with '[' at character 1 of <html>
12-05 12:17:22.347: W/System.err(950): <head>
12-05 12:17:22.347: W/System.err(950): <title>Configuration Error</title>
12-05 12:17:22.347: W/System.err(950): <style>
12-05 12:17:22.347: W/System.err(950): body {font-family:"Verdana";font-weight:normal;font-size: .7em;color:black;}
12-05 12:17:22.347: W/System.err(950): p {font-family:"Verdana";font-weight:normal;color:black;margin-top: -5px}
12-05 12:17:22.347: W/System.err(950): b {font-family:"Verdana";font-weight:bold;color:black;margin-top: -5px}
12-05 12:17:22.347: W/System.err(950): H1 { font-family:"Verdana";font-weight:normal;font-size:18pt;color:red }
12-05 12:17:22.347: W/System.err(950): H2 { font-family:"Verdana";font-weight:normal;font-size:14pt;color:maroon }
12-05 12:17:22.356: W/System.err(950): pre {font-family:"Lucida Console";font-size: .9em}
12-05 12:17:22.356: W/System.err(950): .marker {font-weight: bold; color: black;text-decoration: none;}
12-05 12:17:22.356: W/System.err(950): .version {color: gray;}
12-05 12:17:22.356: W/System.err(950): .error {margin-bottom: 10px;}
12-05 12:17:22.356: W/System.err(950): .expandable { text-decoration:underline; font-weight:bold; color:navy; cursor:hand; }
12-05 12:17:22.356: W/System.err(950): </style>
12-05 12:17:22.356: W/System.err(950): </head>
12-05 12:17:22.356: W/System.err(950):
12-05 12:17:22.356: W/System.err(950): <body bgcolor="white">
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <span><H1>Server Error in '/' Application.<hr width=100% size=1 color=silver></H1>
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <h2> <i>Configuration Error</i> </h2></span>
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">
12-05 12:17:22.366: W/System.err(950):
12-05 12:17:22.366: W/System.err(950): <b> Description: </b>An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
12-05 12:17:22.377: W/System.err(950): <br><br>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): <b> Parser Error Message: </b>Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive.<br><br>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): <b>Source Error:</b> <br><br>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): <table width=100% bgcolor="#ffffcc">
12-05 12:17:22.377: W/System.err(950): <tr>
12-05 12:17:22.377: W/System.err(950): <td>
12-05 12:17:22.377: W/System.err(950): <code><pre>
12-05 12:17:22.377: W/System.err(950):
12-05 12:17:22.377: W/System.err(950): Line 30: <error statusCode="404" redirect="filenotfound.htm" />
12-05 12:17:22.377: W/System.err(950): Line 31: </customErrors>
12-05 12:17:22.377: W/System.err(950): <font color=red>Line 32: <compilation debug="true" targetFramework="4.0">
12-05 12:17:22.396: W/System.err(950): </font>Line 33: <expressionBuilders>
12-05 12:17:22.396: W/System.err(950): Line 34: <add expressionPrefix="NopResources" type="NopSolutions.NopCommerce.BusinessLogic.Localization.NopResourceExpressionBuilder, Nop.BusinessLogic" /></pre></code>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): </td>
12-05 12:17:22.396: W/System.err(950): </tr>
12-05 12:17:22.396: W/System.err(950): </table>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): <br>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): <b> Source File: </b> C:\Websites\balajeebazaar\web.config<b> Line: </b> 32
12-05 12:17:22.396: W/System.err(950): <br><br>
12-05 12:17:22.396: W/System.err(950):
12-05 12:17:22.396: W/System.err(950): <hr width=100% size=1 color=silver>
12-05 12:17:22.407: W/System.err(950):
12-05 12:17:22.407: W/System.err(950): <b>Version Information:</b> Microsoft .NET Framework Version:2.0.50727.4963; ASP.NET Version:2.0.50727.4955
12-05 12:17:22.407: W/System.err(950):
12-05 12:17:22.407: W/System.err(950): </font>
12-05 12:17:22.407: W/System.err(950):
12-05 12:17:22.416: W/System.err(950): </body>
12-05 12:17:22.416: W/System.err(950): </html>
12-05 12:17:22.416: W/System.err(950): <!--
12-05 12:17:22.416: W/System.err(950): [ConfigurationErrorsException]: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive. (C:\Websites\balajeebazaar\web.config line 32)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.HostingInit(HostingEnvironmentFlags hostingFlags)
12-05 12:17:22.416: W/System.err(950): [HttpException]: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive. (C:\Websites\balajeebazaar\web.config line 32)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.FirstRequestInit(HttpContext context)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context)
12-05 12:17:22.416: W/System.err(950): at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context)
12-05 12:17:22.416: W/System.err(950): --><!--
12-05 12:17:22.426: W/System.err(950): This error page might contain sensitive information because ASP.NET is configured to show verbose error messages using <customErrors mode="Off"/>. Consider using <customErrors mode="On"/> or <customErrors mode="RemoteOnly"/> in production environments.-->
12-05 12:17:22.426: W/System.err(950): at org.json.JSONTokener.syntaxError(JSONTokener.java:448)
12-05 12:17:22.426: W/System.err(950): at org.json.JSONArray.<init>(JSONArray.java:104)
12-05 12:17:22.426: W/System.err(950): at org.json.JSONArray.<init>(JSONArray.java:150)
12-05 12:17:22.426: W/System.err(950): at cm.bzaar.CallWebservices.getCategory(CallWebservices.java:48)
12-05 12:17:22.426: W/System.err(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:98)
12-05 12:17:22.426: W/System.err(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:1)
12-05 12:17:22.436: W/System.err(950): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:256)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.FutureTask.run(FutureTask.java:122)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648)
12-05 12:17:22.436: W/System.err(950): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673)
12-05 12:17:22.436: W/System.err(950): at java.lang.Thread.run(Thread.java:1060)
12-05 12:17:22.436: W/dalvikvm(950): threadid=17: thread exiting with uncaught exception (group=0x4001aa28)
12-05 12:17:22.446: E/AndroidRuntime(950): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
12-05 12:17:22.446: E/AndroidRuntime(950): java.lang.RuntimeException: An error occured while executing doInBackground()
12-05 12:17:22.446: E/AndroidRuntime(950): at android.os.AsyncTask$3.done(AsyncTask.java:200)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:234)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:258)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask.run(FutureTask.java:122)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.lang.Thread.run(Thread.java:1060)
12-05 12:17:22.446: E/AndroidRuntime(950): Caused by: java.lang.NullPointerException
12-05 12:17:22.446: E/AndroidRuntime(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:100)
12-05 12:17:22.446: E/AndroidRuntime(950): at cm.bzaar.CategoryActivity$Loader.doInBackground(CategoryActivity.java:1)
12-05 12:17:22.446: E/AndroidRuntime(950): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-05 12:17:22.446: E/AndroidRuntime(950): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:256)
12-05 12:17:22.446: E/AndroidRuntime(950): ... 4 more
VOIR SUIVANT CODE:
segment de code où la fonction est appelée à l'appel webservice:
@Override
protected Void doInBackground(Void... arg0) {
CategoryArray = new JSONArray();
CategoryArray = CW
.getCategory("url");
for (int i = 0; i <= CategoryArray.length() - 1; i++) {
try {
Log.v("category array : ", CategoryArray.getString(i));
String[] val = CategoryArray.getString(i).split("•");
CategoryID.add(i, val[0]);
CategoryList.add(i, val[1]);
} catch (JSONException e) {
e.printStackTrace();
}
}
adapter = new CategoryListAdapter(CategoryActivity.this,
CategoryList);
return null;
}
fonction à l'appel webservice:
public JSONArray getCategory(String URL){
try {
HttpPost request = new HttpPost(URL);
request.setHeader("Accept", "application/json");
request.setHeader("Content-type", "application/json");
// Send request to WCF service
DefaultHttpClient httpClient1 = new DefaultHttpClient();
HttpResponse response = httpClient1.execute(request);
Log.v("response code", response.getStatusLine().getStatusCode()
+ "");
responseCode = response.getStatusLine().getStatusCode();
// if(responseCode > 200){ // HERE I WS TRYING TO BREAK THE CODE AND TRYING TO RETURN NULL BT UNABLE TO DO SO
// CategoryArray = new JSONArray();
// CategoryArray.put(false);
// return null;
// }else{
HttpEntity responseEntity = response.getEntity();
// Read response data into buffer
char[] buffer = new char[(int) responseEntity.getContentLength()];
InputStream stream = responseEntity.getContent();
InputStreamReader reader = new InputStreamReader(stream);
reader.read(buffer);
stream.close();
CategoryArray = new JSONArray(new String(buffer));
Log.v("results length : ", CategoryArray.length() + "");
// }
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return CategoryArray;
}
voir la ligne où je compare la réponse code.Please me guide sur comment puis-je briser mon code là-bas et montrer u un toast sur ui
La solution
Après avoir vu la logcat vous avez posté, je pense que vous récupérez une chaîne JSON comme une réponse. Lorsque vous obtenez la réponse que vous voulez, vous devrez analyser.
Alors, pour que vous n'êtes pas tenu par la suite dans votre code, je vous aide à continuer Une fois que vous obtenez votre réponse en donnant exemple suivant de la mine:
Dans un de mes projets la réponse que je suis arrivé du service Web est:
{ "checkrecord": [{ "rollno": "abc2", "pourcentage": 40, "assisté": 12, "manqué": 34}], "Tableau 1": []}
Pour analyser je l'ai fait ce qui suit:
JSONObject jsonobject = new JSONObject(result);
JSONArray array = jsonobject.getJSONArray("checkrecord");
int max = array.length();
for (int j = 0; j < max; j++)
{
JSONObject obj = array.getJSONObject(j);
JSONArray names = obj.names();
for (int k = 0; k < names.length(); k++)
{
String name = names.getString(k);
String value= obj.getString(name);
}
Mon JSONObject ressemble à ceci:
{ "Tableau 1": [], "checkrecord": [{ "manqué": 34, "assisté": 12, "pourcentage": 40, "rollno": "abc2"}]}
est ce que le @gwa a essayé de suggérer. Je viens de donner un exemple de code pour vous. Obtenez votre premier résultat et déterminer si elle est valide.
it helps
Vive
Autres conseils
En même temps, vous devez vérifier le code de réponse, en utilisant ce code, vous pouvez facilement savoir si la demande a réussi ou échoué en raison de serveur vers le bas ou toute autre raison.
Vous pouvez vérifier le code d'état de réponse en utilisant:
response.getStatusLine().getStatusCode();
Le problème est que vous créez un objet JSON en utilisant une réponse qui est vide ou ne représente pas une chaîne JSON.
Alors, vous devez créer un objet JSON en fonction de votre réponse si:
- the status code is 200
- the response is not empty
- the response starts with '['
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