fastpy-append函数

/** * @license Highcharts JS v2.3.3 (2012-11-02) * * (c) 20012-2014 * * Author: Gert Vaartjes * * License: www.highcharts.com/license */ package com.highcharts.export.controller; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.NoSuchElementException; import java.util.concurrent.TimeoutException; import javax.annotation.Resource; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.IOUtils; import org.apache.log4j.Logger; import org.springframework.http.HttpStatus; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import com.highcharts.export.converter.SVGConverter; import com.highcharts.export.converter.SVGConverterException; import com.highcharts.export.pool.PoolException; import com.highcharts.export.util.MimeType; import com.highcharts.export.util.TempDir; import java.io.File; import java.nio.file.Path; import java.nio.file.Paths; import java.util.logging.Level; import javax.servlet.http.HttpSession; import org.apache.commons.codec.binary.Base64; import org.apache.commons.io.FileUtils; import org.apache.commons.io.FilenameUtils; import org.apache.commons.lang.RandomStringUtils; import org.springframework.http.HttpEntity; import org.springframework.http.HttpHeaders; @Controller @RequestMapping("/") public class ExportController extends HttpServlet { private static final long serialVersionUID = 1L; private static final Float MAX_WIDTH = 2000.0F; private static final Float MAX_SCALE = 4.0F; protected static Logger logger = Logger.getLogger("exporter"); @Resource(name = "svgConverter") private SVGConverter converter; /* catch all GET requests and redirect those */ @RequestMapping(method = RequestMethod.GET) public String getAll(HttpSession session) { String tempFile = (String) session.getAttribute("tempFile"); session.removeAttribute("tempFile"); if (tempFile != null && !tempFile.isEmpty()) { // redirect to file download return "redirect:" + TempDir.getDownloadLink(tempFile); } // redirect to demo page return "redirect:demo"; } @RequestMapping(value = "/demo", method = RequestMethod.GET) public String demo() { return "demo"; } @RequestMapping(method = RequestMethod.POST) public HttpEntity<byte[]> exporter( @RequestParam(value = "svg", required = false) String svg, @RequestParam(value = "type", required = false) String type, @RequestParam(value = "filename", required = false) String filename, @RequestParam(value = "width", required = false) String width, @RequestParam(value = "scale", required = false) String scale, @RequestParam(value = "options", required = false) String options, @RequestParam(value = "constr", required = false) String constructor, @RequestParam(value = "callback", required = false) String callback, @RequestParam(value = "async", required = false, defaultValue = "false") Boolean async, HttpServletRequest request, HttpSession session) throws ServletException, InterruptedException, SVGConverterException, NoSuchElementException, PoolException, TimeoutException, IOException { MimeType mime = getMime(type); String tempFilename = null; boolean isAndroid = request.getHeader("user-agent") != null && request.getHeader("user-agent").contains("Android"); if (isAndroid || MimeType.PDF.equals(mime) || async) { tempFilename = createUniqueFileName(mime.name().toLowerCase()); } String output = processRequest(svg, mime, width, scale, options, constructor, callback, tempFilename); ByteArrayOutputStream stream; if (async) { String link = TempDir.getDownloadLink(tempFilename); // write to stream stream = new ByteArrayOutputStream(); stream.write(link.getBytes("utf-8")); } else { stream = ouputToStream(output, mime, tempFilename); } /* If tempFilename is not null, then we want to save the filename in session, in case of GET is used later on*/ if (isAndroid) { session.setAttribute("tempFile", FilenameUtils.getName(tempFilename)); } filename = getFilename(filename); HttpHeaders headers = new HttpHeaders(); headers.add("Content-Type", mime.getType() + "; charset=utf-8"); headers.add("Content-Disposition", "attachment; filename=" + filename.replace(" ", "_") + "." + mime.name().toLowerCase()); headers.setContentLength(stream.size()); return new HttpEntity<byte[]>(stream.toByteArray(), headers); } @RequestMapping(value = "/files/{name}.{ext}", method = RequestMethod.GET) public void getFile(@PathVariable("name") String name, @PathVariable("ext") String ext, HttpServletResponse response) throws SVGConverterException, IOException { Path path = Paths.get(TempDir.getOutputDir().toString(), name + "." + ext); ByteArrayOutputStream stream = new ByteArrayOutputStream(); try { stream.write(FileUtils.readFileToByteArray(new File(path.toString()))); } catch (IOException ioex) { logger.error("Tried to read file from filesystem: " + ioex.getMessage()); throw new SVGConverterException("IOException: cannot find your file to download..."); } MimeType mime = MimeType.valueOf(ext.toUpperCase()); response.reset(); response.setCharacterEncoding("utf-8"); response.setContentLength(stream.size()); response.setContentType(mime.getType()); response.setStatus(HttpStatus.OK.value()); IOUtils.write(stream.toByteArray(), response.getOutputStream()); response.flushBuffer(); } @ExceptionHandler(IOException.class) public ModelAndView handleIOException(Exception ex, HttpServletResponse response) { ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("error"); modelAndView.addObject("message", ex.getMessage()); response.setStatus(500); return modelAndView; } @ExceptionHandler(TimeoutException.class) public ModelAndView handleTimeoutException(Exception ex, HttpServletResponse response) { ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("error"); modelAndView .addObject( "message", "Timeout converting SVG, is your file this big, or maybe you have a syntax error in the javascript callback?"); response.setStatus(500); return modelAndView; } @ExceptionHandler(PoolException.class) public ModelAndView handleServerPoolException(Exception ex, HttpServletResponse response) { ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("error"); modelAndView .addObject( "message", "Sorry, the server is handling too many requests at the moment. Please try again."); response.setStatus(500); return modelAndView; } @ExceptionHandler(SVGConverterException.class) public ModelAndView handleSVGRasterizeException(Exception ex, HttpServletResponse response) { ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("error"); modelAndView .addObject( "message", "Something went wrong while converting. " + ex.getMessage()); response.setStatus(500); return modelAndView; } @ExceptionHandler(InterruptedException.class) public ModelAndView handleInterruptedException(Exception ex, HttpServletResponse response) { ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("error"); modelAndView .addObject( "message", "It took too long time to process the options, no SVG is created. Make sure your javascript is correct"); response.setStatus(500); return modelAndView; } @ExceptionHandler(ServletException.class) public ModelAndView handleServletException(Excep