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improve error handling by ApiRequest

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This commit is contained in:
Andrew Dolgov 2011-11-29 07:03:38 +03:00
parent 9d0a0426fd
commit 9a4c7a2ce8
7 changed files with 281 additions and 221 deletions
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27
res/values/strings.xml
View File

@ -23,9 +23,6 @@
<string name="theme_light">Light</string>
<string name="connection">Connection</string>
<string name="http_authentication">HTTP Authentication</string>
<string name="login_api_disabled">Login failed: API disabled.</string>
<string name="login_no_data">Login failed: no data received.</string>
<string name="login_wrong_password">Login failed: username or password incorrect.</string>
<string name="login_success">Logged in.</string>
<string name="no_unread_feeds">No unread feeds.</string>
<string name="no_unread_headlines">No unread headlines.</string>
@ -35,15 +32,11 @@
<string name="update_feeds">Refresh feeds</string>
<string name="close_article">Close article</string>
<string name="share_article">Share article</string>
<string name="could_not_decode_content">Could not decode content (UnsupportedEncodingException)</string>
<string name="sort_feeds_by_unread">Sort feeds by unread count</string>
<string name="load_more_articles">Load more...</string>
<string name="show_all_articles">Show all articles</string>
<string name="show_unread_articles">Show unread articles</string>
<string name="ssl_trust_any">Accept any SSL certificate</string>
<string name="error_no_data">Error: no data received.</string>
<string name="error_no_feeds">No feeds to display.</string>
<string name="error_invalid_object">Error: invalid object received.</string>
<string name="blank"></string>
<string name="transport_debugging">Log sent and received data</string>
<string name="toggle_marked">Toggle starred</string>
@ -57,4 +50,24 @@
<string name="download_feed_icons">Download and display feed icons</string>
<string name="enable_cats">Enable feed categories</string>
<string name="back_to_categories">Close category</string>
<string name="no_feeds_to_display">No feeds to display</string>
<string name="no_headlines_to_display">No headlines to display</string>
<string name="error_template">Error: %1$s</string>
<string name="error_no_error">No error</string>
<string name="error_unknown">Error: Unknown error (see log)</string>
<string name="error_http_unauthorized">Error: 401 unauthorized</string>
<string name="error_http_forbidden">Error: 403 forbidden</string>
<string name="error_http_not_found">Error: 404 not found</string>
<string name="error_http_server_error">Error: 500 server error</string>
<string name="error_http_other_error">Error: other HTTP error (see log)</string>
<string name="error_ssl_rejected">Error: SSL certificate rejected</string>
<string name="error_parse_error">Error: JSON parse failed</string>
<string name="error_io_error">Error: I/O failure (server down?)</string>
<string name="error_other_error">Error: unknown error (see log)</string>
<string name="error_api_disabled">Error: API disabled for this user</string>
<string name="error_api_unknown">Error: unknown API error (see log)</string>
<string name="error_login_failed">Error: username or password incorrect</string>
</resources>

133
src/org/fox/ttrss/ApiRequest.java
View File

@ -1,6 +1,7 @@
package org.fox.ttrss;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
@ -29,21 +30,27 @@ import android.util.Log;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
public class ApiRequest extends AsyncTask<HashMap<String,String>, Integer, JsonElement> {
private final String TAG = this.getClass().getSimpleName();
protected static final int STATUS_LOGIN_FAILED = 0;
protected static final int STATUS_OK = 1;
protected static final int STATUS_API_DISABLED = 2;
protected static final int STATUS_OTHER_ERROR = 3;
public enum ApiError { NO_ERROR, HTTP_UNAUTHORIZED, HTTP_FORBIDDEN, HTTP_NOT_FOUND,
HTTP_SERVER_ERROR, HTTP_OTHER_ERROR, SSL_REJECTED, PARSE_ERROR, IO_ERROR, OTHER_ERROR, API_DISABLED, API_UNKNOWN, LOGIN_FAILED };
public static final int API_STATUS_OK = 0;
public static final int API_STATUS_ERR = 1;
private String m_api;
private boolean m_trustAny = false;
private boolean m_transportDebugging = false;
protected int m_httpStatusCode = 0;
protected int m_apiStatusCode = 0;
private Context m_context;
private SharedPreferences m_prefs;
protected ApiError m_lastError;
public ApiRequest(Context context) {
m_context = context;
@ -53,6 +60,42 @@ public class ApiRequest extends AsyncTask<HashMap<String,String>, Integer, JsonE
m_api = m_prefs.getString("ttrss_url", null);
m_trustAny = m_prefs.getBoolean("ssl_trust_any", false);
m_transportDebugging = m_prefs.getBoolean("transport_debugging", false);
m_lastError = ApiError.NO_ERROR;
}
protected int getErrorMessage() {
switch (m_lastError) {
case NO_ERROR:
return R.string.error_unknown;
case HTTP_UNAUTHORIZED:
return R.string.error_http_unauthorized;
case HTTP_FORBIDDEN:
return R.string.error_http_forbidden;
case HTTP_NOT_FOUND:
return R.string.error_http_not_found;
case HTTP_SERVER_ERROR:
return R.string.error_http_server_error;
case HTTP_OTHER_ERROR:
return R.string.error_http_other_error;
case SSL_REJECTED:
return R.string.error_ssl_rejected;
case PARSE_ERROR:
return R.string.error_parse_error;
case IO_ERROR:
return R.string.error_io_error;
case OTHER_ERROR:
return R.string.error_other_error;
case API_DISABLED:
return R.string.error_api_disabled;
case API_UNKNOWN:
return R.string.error_api_unknown;
case LOGIN_FAILED:
return R.string.error_login_failed;
default:
Log.d(TAG, "getErrorMessage: unknown error code=" + m_lastError);
return R.string.error_unknown;
}
}
@Override
@ -106,25 +149,77 @@ public class ApiRequest extends AsyncTask<HashMap<String,String>, Integer, JsonE
httpPost.setEntity(new StringEntity(requestStr, "utf-8"));
HttpResponse execute = client.execute(httpPost);
InputStream content = execute.getEntity().getContent();
m_httpStatusCode = execute.getStatusLine().getStatusCode();
BufferedReader buffer = new BufferedReader(
new InputStreamReader(content), 8192);
String s = "";
String response = "";
while ((s = buffer.readLine()) != null) {
response += s;
switch (m_httpStatusCode) {
case 200:
InputStream content = execute.getEntity().getContent();
BufferedReader buffer = new BufferedReader(
new InputStreamReader(content), 8192);
String s = "";
String response = "";
while ((s = buffer.readLine()) != null) {
response += s;
}
if (m_transportDebugging) Log.d(TAG, "<<< " + response);
JsonParser parser = new JsonParser();
JsonElement result = parser.parse(response);
JsonObject resultObj = result.getAsJsonObject();
m_apiStatusCode = resultObj.get("status").getAsInt();
switch (m_apiStatusCode) {
case API_STATUS_OK:
return result.getAsJsonObject().get("content");
case API_STATUS_ERR:
JsonObject contentObj = resultObj.get("content").getAsJsonObject();
String error = contentObj.get("error").getAsString();
if (error.equals("LOGIN_ERROR")) {
m_lastError = ApiError.LOGIN_FAILED;
} else if (error.equals("API_DISABLED")) {
m_lastError = ApiError.LOGIN_FAILED;
} else {
m_lastError = ApiError.API_UNKNOWN;
}
}
return null;
case 401:
m_lastError = ApiError.HTTP_UNAUTHORIZED;
break;
case 403:
m_lastError = ApiError.HTTP_FORBIDDEN;
break;
case 404:
m_lastError = ApiError.HTTP_NOT_FOUND;
break;
case 500:
m_lastError = ApiError.HTTP_SERVER_ERROR;
break;
default:
m_lastError = ApiError.HTTP_OTHER_ERROR;
break;
}
if (m_transportDebugging) Log.d(TAG, "<<< " + response);
JsonParser parser = new JsonParser();
return parser.parse(response);
return null;
} catch (javax.net.ssl.SSLPeerUnverifiedException e) {
m_lastError = ApiError.SSL_REJECTED;
e.printStackTrace();
} catch (IOException e) {
m_lastError = ApiError.IO_ERROR;
e.printStackTrace();
} catch (com.google.gson.JsonSyntaxException e) {
m_lastError = ApiError.PARSE_ERROR;
e.printStackTrace();
} catch (Exception e) {
m_lastError = ApiError.OTHER_ERROR;
e.printStackTrace();
}

40
src/org/fox/ttrss/ArticleFragment.java
View File

@ -94,31 +94,25 @@ public class ArticleFragment extends Fragment implements OnClickListener {
// this is ridiculous
// TODO white on black style for dark theme
String content;
try {
String cssOverride = "";
if (m_prefs.getString("theme", "THEME_DARK").equals("THEME_DARK")) {
web.setBackgroundColor(android.R.color.black);
cssOverride = "body { background : black; color : #f0f0f0}\n";
}
content =
"<html>" +
"<head>" +
"<meta content=\"text/html; charset=utf-8\" http-equiv=\"content-type\">" +
"<style type=\"text/css\">" +
cssOverride +
"img { max-width : 90%; }" +
"body { text-align : justify; }" +
"</style>" +
"</head>" +
"<body>" + m_article.content + "</body></html>";
} catch (Exception e) {
content = getString(R.string.could_not_decode_content);
e.printStackTrace();
String cssOverride = "";
if (m_prefs.getString("theme", "THEME_DARK").equals("THEME_DARK")) {
web.setBackgroundColor(android.R.color.black);
cssOverride = "body { background : black; color : #f0f0f0}\n";
}
content =
"<html>" +
"<head>" +
"<meta content=\"text/html; charset=utf-8\" http-equiv=\"content-type\">" +
"<style type=\"text/css\">" +
cssOverride +
"img { max-width : 90%; }" +
"body { text-align : justify; }" +
"</style>" +
"</head>" +
"<body>" + m_article.content + "</body></html>";
web.loadDataWithBaseURL(null, content, "text/html", "utf-8", null);
if (activity.isSmallScreen())

70
src/org/fox/ttrss/FeedCategoriesFragment.java
View File

@ -14,6 +14,7 @@ import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
@ -162,52 +163,43 @@ public class FeedCategoriesFragment extends Fragment implements OnItemClickListe
public CatsRequest(Context context) {
super(context);
}
protected void onPostExecute(JsonElement result) {
if (result != null) {
try {
JsonObject rv = result.getAsJsonObject();
Gson gson = new Gson();
int status = rv.get("status").getAsInt();
if (status == 0) {
JsonArray content = rv.get("content").getAsJsonArray();
if (content != null) {
Type listType = new TypeToken<List<FeedCategory>>() {}.getType();
final List<FeedCategory> cats = gson.fromJson(content, listType);
m_cats.clear();
for (FeedCategory c : cats)
m_cats.add(c);
sortCats();
if (m_cats.size() == 0)
setLoadingStatus(R.string.error_no_feeds, false);
else
setLoadingStatus(R.string.blank, false);
}
} else {
MainActivity activity = (MainActivity)getActivity();
activity.login();
JsonArray content = result.getAsJsonArray();
if (content != null) {
Type listType = new TypeToken<List<FeedCategory>>() {}.getType();
final List<FeedCategory> cats = new Gson().fromJson(content, listType);
m_cats.clear();
for (FeedCategory c : cats)
m_cats.add(c);
sortCats();
if (m_cats.size() == 0)
setLoadingStatus(R.string.no_feeds_to_display, false);
else
setLoadingStatus(R.string.blank, false);
return;
}
} catch (Exception e) {
e.printStackTrace();
setLoadingStatus(R.string.error_invalid_object, false);
// report invalid object received
e.printStackTrace();
}
} else {
// report null object received, unless we've been awakened from sleep right in the right time
// so that current request failed
if (m_cats.size() == 0) setLoadingStatus(R.string.error_no_data, false);
}
return;
}
if (m_lastError == ApiError.LOGIN_FAILED) {
MainActivity activity = (MainActivity)getActivity();
activity.login();
} else {
setLoadingStatus(getErrorMessage(), false);
}
}
}
public void sortCats() {

72
src/org/fox/ttrss/FeedsFragment.java
View File

@ -51,7 +51,6 @@ import android.widget.TextView;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.reflect.TypeToken;
public class FeedsFragment extends Fragment implements OnItemClickListener, OnSharedPreferenceChangeListener {
@ -220,7 +219,7 @@ public class FeedsFragment extends Fragment implements OnItemClickListener, OnSh
if (result != null) {
try {
JsonElement iconsUrl = result.getAsJsonObject().get("content").getAsJsonObject().get("icons_dir");
JsonElement iconsUrl = result.getAsJsonObject().get("icons_dir");
if (iconsUrl != null) {
String iconsStr = iconsUrl.getAsString();
@ -261,54 +260,45 @@ public class FeedsFragment extends Fragment implements OnItemClickListener, OnSh
public FeedsRequest(Context context) {
super(context);
}
protected void onPostExecute(JsonElement result) {
if (result != null) {
try {
JsonObject rv = result.getAsJsonObject();
JsonArray content = result.getAsJsonArray();
if (content != null) {
Gson gson = new Gson();
int status = rv.get("status").getAsInt();
if (status == 0) {
JsonArray content = rv.get("content").getAsJsonArray();
if (content != null) {
Type listType = new TypeToken<List<Feed>>() {}.getType();
final List<Feed> feeds = gson.fromJson(content, listType);
m_feeds.clear();
for (Feed f : feeds)
if (f.id > -10) // skip labels for now
m_feeds.add(f);
sortFeeds();
if (m_feeds.size() == 0)
setLoadingStatus(R.string.error_no_feeds, false);
else
setLoadingStatus(R.string.blank, false);
Type listType = new TypeToken<List<Feed>>() {}.getType();
final List<Feed> feeds = new Gson().fromJson(content, listType);
m_feeds.clear();
for (Feed f : feeds)
if (f.id > -10) // skip labels for now
m_feeds.add(f);
sortFeeds();
if (m_feeds.size() == 0)
setLoadingStatus(R.string.no_feeds_to_display, false);
else
setLoadingStatus(R.string.blank, false);
if (m_enableFeedIcons) getFeedIcons();
}
} else {
MainActivity activity = (MainActivity)getActivity();
activity.login();
if (m_enableFeedIcons) getFeedIcons();
return;
}
} catch (Exception e) {
e.printStackTrace();
setLoadingStatus(R.string.error_invalid_object, false);
// report invalid object received
e.printStackTrace();
}
} else {
// report null object received, unless we've been awakened from sleep right in the right time
// so that current request failed
if (m_feeds.size() == 0) setLoadingStatus(R.string.error_no_data, false);
}
return;
if (m_lastError == ApiError.LOGIN_FAILED) {
MainActivity activity = (MainActivity)getActivity();
activity.login();
} else {
setLoadingStatus(getErrorMessage(), false);
}
}
}

89
src/org/fox/ttrss/HeadlinesFragment.java
View File

@ -34,7 +34,6 @@ import android.widget.TextView;
import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.reflect.TypeToken;
public class HeadlinesFragment extends Fragment implements OnItemClickListener {
@ -174,54 +173,50 @@ public class HeadlinesFragment extends Fragment implements OnItemClickListener {
protected void onPostExecute(JsonElement result) {
if (result != null) {
try {
JsonObject rv = result.getAsJsonObject();
Gson gson = new Gson();
int status = rv.get("status").getAsInt();
if (status == 0) {
JsonArray content = rv.get("content").getAsJsonArray();
if (content != null) {
Type listType = new TypeToken<List<Article>>() {}.getType();
final List<Article> articles = gson.fromJson(content, listType);
if (m_offset == 0)
m_articles.clear();
int last_position = m_articles.size();
for (Article f : articles)
m_articles.add(f);
m_adapter.notifyDataSetChanged();
ListView list = (ListView)getView().findViewById(R.id.headlines);
if (list != null && m_offset != 0) {
list.setSelection(last_position+1);
}
MainActivity activity = (MainActivity)getActivity();
activity.setCanLoadMore(articles.size() >= 30);
activity.initMainMenu();
setLoadingStatus(R.string.blank, false);
JsonArray content = result.getAsJsonArray();
if (content != null) {
Type listType = new TypeToken<List<Article>>() {}.getType();
final List<Article> articles = new Gson().fromJson(content, listType);
if (m_offset == 0)
m_articles.clear();
int last_position = m_articles.size();
for (Article f : articles)
m_articles.add(f);
m_adapter.notifyDataSetChanged();
ListView list = (ListView)getView().findViewById(R.id.headlines);
if (list != null && m_offset != 0) {
list.setSelection(last_position+1);
}
} else {
MainActivity activity = (MainActivity)getActivity();
activity.login();
}
} catch (Exception e) {
e.printStackTrace();
setLoadingStatus(R.string.error_invalid_object, false);
}
} else {
setLoadingStatus(R.string.error_no_data, false);
}
return;
MainActivity activity = (MainActivity)getActivity();
activity.setCanLoadMore(articles.size() >= 30);
activity.initMainMenu();
if (m_articles.size() == 0)
setLoadingStatus(R.string.no_headlines_to_display, false);
else
setLoadingStatus(R.string.blank, false);
return;
}
} catch (Exception e) {
e.printStackTrace();
}
}
if (m_lastError == ApiError.LOGIN_FAILED) {
MainActivity activity = (MainActivity)getActivity();
activity.login();
} else {
setLoadingStatus(getErrorMessage(), false);
}
}
public void setOffset(int skip) {

71
src/org/fox/ttrss/MainActivity.java
View File

@ -633,60 +633,41 @@ public class MainActivity extends FragmentActivity implements FeedsFragment.OnFe
protected void onPostExecute(JsonElement result) {
if (result != null) {
try {
JsonObject rv = result.getAsJsonObject();
int status = rv.get("status").getAsInt();
if (status == 0) {
JsonObject content = rv.get("content").getAsJsonObject();
if (content != null) {
m_sessionId = content.get("session_id").getAsString();
Log.d(TAG, "Authenticated!");
setLoadingStatus(R.string.loading_message, true);
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
if (m_enableCats) {
FeedCategoriesFragment frag = new FeedCategoriesFragment();
ft.replace(R.id.cats_fragment, frag);
} else {
FeedsFragment frag = new FeedsFragment();
ft.replace(R.id.feeds_fragment, frag);
}
ft.commit();
loginSuccess();
}
} else {
JsonObject content = rv.get("content").getAsJsonObject();
JsonObject content = result.getAsJsonObject();
if (content != null) {
m_sessionId = content.get("session_id").getAsString();
if (content != null) {
String error = content.get("error").getAsString();
Log.d(TAG, "Authenticated!");
setLoadingStatus(R.string.loading_message, true);
m_sessionId = null;
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
if (m_enableCats) {
FeedCategoriesFragment frag = new FeedCategoriesFragment();
ft.replace(R.id.cats_fragment, frag);
} else {
FeedsFragment frag = new FeedsFragment();
ft.replace(R.id.feeds_fragment, frag);
}
if (error.equals("LOGIN_ERROR")) {
setLoadingStatus(R.string.login_wrong_password, false);
} else if (error.equals("API_DISABLED")) {
setLoadingStatus(R.string.login_api_disabled, false);
} else {
setLoadingStatus(R.string.login_failed, false);
}
m_menu.findItem(R.id.login).setVisible(true);
}
ft.commit();
loginSuccess();
return;
}
} catch (Exception e) {
e.printStackTrace();
}
} else {
setLoadingStatus(R.string.login_no_data, false);
}
m_sessionId = null;
setLoadingStatus(getErrorMessage(), false);
m_menu.findItem(R.id.login).setVisible(true);
}
}
@Override