Directory integration prototype using Google Firebase auth + Synapse SQL

src/main/java/io/kamax/mxisd/controller/DefaultExceptionHandler.java

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+/*
+ * mxisd - Matrix Identity Server Daemon
+ * Copyright (C) 2017 Maxime Dor
+ *
+ * https://max.kamax.io/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package io.kamax.mxisd.controller;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonSyntaxException;
+import io.kamax.mxisd.exception.*;
+import org.apache.commons.lang.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.MissingServletRequestParameterException;
+import org.springframework.web.bind.annotation.*;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.time.Instant;
+
+@ControllerAdvice
+@ResponseBody
+@RequestMapping(produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
+public class DefaultExceptionHandler {
+
+    private Logger log = LoggerFactory.getLogger(DefaultExceptionHandler.class);
+
+    private static Gson gson = new Gson();
+
+    static String handle(String erroCode, String error) {
+        JsonObject obj = new JsonObject();
+        obj.addProperty("errcode", erroCode);
+        obj.addProperty("error", error);
+        obj.addProperty("success", false);
+        return gson.toJson(obj);
+    }
+
+    @ExceptionHandler(InternalServerError.class)
+    public String handle(InternalServerError e, HttpServletResponse response) {
+        if (StringUtils.isNotBlank(e.getInternalReason())) {
+            log.error("Reference #{} - {}", e.getReference(), e.getInternalReason());
+        } else {
+            log.error("Reference #{}", e);
+        }
+
+        return handleGeneric(e, response);
+    }
+
+    @ExceptionHandler(MatrixException.class)
+    public String handleGeneric(MatrixException e, HttpServletResponse response) {
+        response.setStatus(e.getStatus());
+        return handle(e.getErrorCode(), e.getError());
+    }
+
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(MissingServletRequestParameterException.class)
+    public String handle(MissingServletRequestParameterException e) {
+        return handle("M_INCOMPLETE_REQUEST", e.getMessage());
+    }
+
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(InvalidResponseJsonException.class)
+    public String handle(InvalidResponseJsonException e) {
+        return handle("M_INVALID_JSON", e.getMessage());
+    }
+
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(JsonSyntaxException.class)
+    public String handle(JsonSyntaxException e) {
+        return handle("M_INVALID_JSON", e.getMessage());
+    }
+
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(JsonMemberNotFoundException.class)
+    public String handle(JsonMemberNotFoundException e) {
+        return handle("M_JSON_MISSING_KEYS", e.getMessage());
+    }
+
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(MappingAlreadyExistsException.class)
+    public String handle(MappingAlreadyExistsException e) {
+        return handle("M_ALREADY_EXISTS", e.getMessage());
+    }
+
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(BadRequestException.class)
+    public String handle(BadRequestException e) {
+        return handle("M_BAD_REQUEST", e.getMessage());
+    }
+
+    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+    @ExceptionHandler(RuntimeException.class)
+    public String handle(HttpServletRequest req, RuntimeException e) {
+        log.error("Unknown error when handling {}", req.getRequestURL(), e);
+        return handle(
+                "M_UNKNOWN",
+                StringUtils.defaultIfBlank(
+                        e.getMessage(),
+                        "An internal server error occurred. If this error persists, please contact support with reference #" +
+                                Instant.now().toEpochMilli()
+                )
+        );
+    }
+
+}