artoria.exception.support.AbstractServletErrorHandler Maven / Gradle / Ivy

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Artoria is a java technology framework based on the facade pattern.

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package artoria.exception.support;

import artoria.common.Result;
import artoria.exception.ExceptionUtils;
import artoria.exception.ServletErrorHandler;
import artoria.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

import static artoria.common.constant.Charsets.STR_UTF_8;
import static java.lang.Boolean.FALSE;

public abstract class AbstractServletErrorHandler implements ServletErrorHandler {
    protected static final String TEXT_HTML = "text/html";

    protected String createHtmlString(String errorCode, String errorMessage) {
        return "\n" +
        "\n" +
        "\n" +
        "    An error has occurred. \n" +
        "\n" +
        "\n" +
        "    \n" +
        "        An error has occurred. \n" +
        "    \n" +
        (StringUtils.isNotBlank(errorCode) ?
        "    Error Code: " + errorCode + "
\n" : ""
        ) +
        "    Error Message: " + errorMessage + "
\n" +
        "    Please check the log for details if necessary. 
\n" +
        "\n" +
        "\n";
    }

    protected Object writeHtmlString(HttpServletRequest request,
                                     HttpServletResponse response,
                                     String htmlString) {
        // response write html
        response.setContentType(TEXT_HTML + "; charset=" + STR_UTF_8);
        try { response.getWriter().write(htmlString); }
        catch (IOException e) { throw ExceptionUtils.wrap(e); }
        // no return
        return null;
    }

    protected Object buildHtmlResult(HttpServletRequest request,
                                     HttpServletResponse response,
                                     Throwable throwable) {
        // create html
        String errorMessage = throwable != null ? throwable.getMessage() :
                "An error has occurred. (Response Status: " + response.getStatus() + ") ";
        String htmlString = createHtmlString(null, errorMessage);
        // response write html
        return writeHtmlString(request, response, htmlString);
    }

    protected Object buildOtherResult(HttpServletRequest request,
                                      HttpServletResponse response,
                                      Throwable throwable) {
        String errorMessage; int respStatus = response.getStatus();
        errorMessage = throwable != null ? throwable.getMessage() :
                "An error has occurred. (Response Status: " + respStatus + ") ";
        return new Result

artoria.exception.support.AbstractServletErrorHandler Maven / Gradle / Ivy

\n" + " An error has occurred. \n" + "