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• fastchar
• 1.5.6
• source code
• FastOutError.java

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com.fastchar.out.FastOutError Maven / Gradle / Ivy

package com.fastchar.out;

import com.fastchar.core.FastAction;
import com.fastchar.core.FastChar;
import com.fastchar.core.FastConstant;
import com.fastchar.utils.FastStringUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;

/**
 * 响应错误
 */
public class FastOutError extends FastOut {

    public FastOutError() {
        this.contentType = "text/html";
    }

    private static final String POWERED_BY = "FastChar";

    public String toHtml(FastAction action) {
        if (data == null) {
            data = getDescription();
        }
        String description = data.toString()
                .replace("\n", "
")
                .replace("\t", "        ");
        String html = "";
        if (getStatus() == 404) {
            html = "
HTTP Status：
404
HTTP Method：
"+action.getRequestMethod()+"
Message：
Http url does not exist!
Description：
" + description + "
Powered By：
" + POWERED_BY + "
Version：
" + FastConstant.FAST_CHAR_VERSION + "
";
        } else if (getStatus() == 502) {
            html = "
HTTP Status：
502
HTTP Method：
"+action.getRequestMethod()+"
Message：
The Http response is not received!
Description：
" + description + "
Powered By：
" + POWERED_BY + "
Version：
" + FastConstant.FAST_CHAR_VERSION + "
";
        } else {
            html = "
HTTP Status：
500
HTTP Method：
"+action.getRequestMethod()+"
Message：
An error occurred on the server!
Description：
" + description + "
Powered By：
" + POWERED_BY + "
Version：
" + FastConstant.FAST_CHAR_VERSION + "
";
        }
        return html;
    }

    public String getErrorPage() {
        if (getStatus() == 500) {
            return FastChar.getConstant().getErrorPage500();
        } else if (getStatus() == 502) {
            return FastChar.getConstant().getErrorPage502();
        } else if (getStatus() == 404) {
            return FastChar.getConstant().getErrorPage404();
        }
        return null;
    }

    @Override
    public void response(FastAction action) {
        try {
            HttpServletResponse response = action.getResponse();
            if (FastStringUtils.isEmpty(getErrorPage())) {
                response.setHeader("Pragma", "no-cache");
                response.setHeader("Cache-Control", "no-cache");
                response.setDateHeader("Expires", 0);
                response.setStatus(getStatus());
                response.setContentType(toContentType(action));
                response.setCharacterEncoding(getCharset());

                try (PrintWriter writer = response.getWriter()) {
                    writer.write(toHtml(action));
                    writer.flush();
                }
            } else {
                response.sendRedirect(FastChar.wrapperUrl(getErrorPage()));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}