FusionCharts通过php后台导出PDF或图片

<?php /** * * FusionCharts Exporter is a PHP script that handles * FusionCharts (since v3.1) Server Side Export feature. * This in conjuncture with other resource PHP scripts would * process FusionCharts Export Data POSTED to it from FusionCharts * and convert the data to image or PDF and subsequently save to the * server or response back as http response to client side as download. * * This script might be called as the FusionCharts Exporter - main module * * @author FusionCharts * @description FusionCharts Exporter (Server-Side - PHP) * @version 2.0 [ 12 February 2009 ] * */ /** * ChangeLog / Version History: * ---------------------------- * * 2.0 [ 12 February 2009 ] * - Integrated with new Export feature of FusionCharts 3.1 * - can save to server side directory * - can provide download or open in popupr window * - can report back to chart * - can save as PDF/JPG/PNG/GIF * * 1.0 [ 16 August 2007 ] * - can process chart data to jpg image and response back to client side as download. * */ /** * Copyright (c) 2009 InfoSoft Global Private Limited. All Rights Reserved. * */ /** * GENERAL NOTES * ------------- * * Chart would POST export data (which consists of encoded image data stream, * width, height, background color and various other export parameters like * exportFormat, exportFileName, exportAction, exportTargetWindow) to this script. * * The script would process this data using appropriate resource files and build * export binary (PDF/image) * * It either saves the binary as file to a server side directory or push it as * Download to client side. * * * ISSUES * ------ * Q. What if someone wishes to open in the same page where the chart existed as postback * replacing the old page? * * A. Not directly supported using any chart attribute or parameter but can do by * removing/commenting the line containing 'header( content-disposition ...' * */ /** * @requires FCExporter_{format}.php as export resouce for the specific format * e.g. FCExporter_PDF.php (containing PDF Releated Export resource functions) * FCExporter_IMG.php (containing JPEG/PNG/GIF Releated Export resource functions) * * Details * ------- * Only one export resource would be included at one time. * * The resource files would have these things as common: * * a) a constant - MIMETYPES that would have a string * containing semicolon separated key value pairs. * Each key can be a format name specified in the * HANDLERASSOCIATIONS constant. The associated value * would be the mimetype for the specified format. * * e.g. define("MIMETYPES","jpg=image/jpeg;jpeg=image/jpeg;png=image/png;gif=image/gif"); * * * b) a constant - EXTENSIONS that again contain a string of * semicolon separated key value pair. Each key would again be the * format name and the extension would be the file extension. * * e.g. define("EXTENSIONS","jpg=jpg;jpeg=jpg;png=png;gif=gif"); * * * c) a function - exportProcessor ( $stream , $meta ) * It would take the FusionCharts exncoded image string as $stream & * an associative array $meta containging width, height and bgColor keys. * * The function would return an object of mixed type which would contain * the processed binary/relevant export object. * * * d) a function - exportOutput ( $exportObj, $exportSettings, $quality=1 ) * It would take the processed export object and other export setting as parameter. * Moreover, it would take an optional parameter - $quality (in scale of 0 to 1). * By Default, the $quality is passed as 1 (best quality) * * The function would return the file path on success or return false on failure. * * [ The other code in the resource file can be anything that support this architecture ] * */ // ============================================================================= // == Constants and Variables == // ============================================================================= // USERS are to EDIT the values of the following constants. /* ----------------------- EXPORT PATH & URI -------------------------------- */ /** * IMPORTANT: You need to change the location of folder where * the exported chart images/PDFs will be saved on your * server. Please specify the path to a folder with * write permissions in the constant SAVE_PATH below. * * Please provide the path as per PHP path conventions. You can use relative or * absolute path. * Examples: './' , '/users/me/images/' , './myimages' * * For Windows servers you can ALSO use \\ as path separator too. e.g. c:\\php\\mysite\\ */ define ( "SAVE_PATH", "Resources/image" ); /** * IMPORTANT: This constant HTTP_URI stores the HTTP reference to * the folder where exported charts will be saved. * Please enter the HTTP representation of that folder * in this constant e.g., http://www.yourdomain.com/images/ */ define ( "HTTP_URI", "Resources/image/" ); // ============================================================================== // Users are recommended NOT to perform any editing beyond this point. == // ============================================================================== /* ------------------------- EXPORT RESOURCES -------------------------------- */ // This constant defines the name of the export handler script file // The name is appended with a suffix (from constant HANDLERASSOCIATIONS) define ( "EXPORTHANDLER", "FCExporter_" ); // This constant lists all the currently supported export formats // and related export handler file suffix. // e.g. for JPEG the suffix is define ( "HANDLERASSOCIATIONS", "PDF=PDF;JPEG=IMG;JPG=IMG;PNG=IMG;GIF=IMG" ); // Path where the export handler files are located // Please note that the resource path should be relative to // FCExporter.php file's directory // By default the path is "./Resources/" define ( "RESOURCEPATH","Resources/" ); /* ---------------------------- Export Settings ------------------------------- */ /** * OVERWRITEFILE sets whether the export handler would overwrite an existing file * the newly created exported file. If it is set to false the export handler would * not overwrite. In this case if INTELLIGENTFILENAMING is set to true the handler * would add a suffix to the new file name. The suffix is a randomly generated UUID. * Additionally, you add a timestamp or random number as additional suffix. * */ define ( "OVERWRITEFILE", false ); define ( "INTELLIGENTFILENAMING", true ); define ( "FILESUFFIXFORMAT", "TIMESTAMP" ) ;// value can be either 'TIMESTAMP' or 'RANDOM' // List the default exportParameter values taken if not provided by chart $defaultParameterValues = array( "exportfilename" => "FusionCharts", "exportaction" => "download", "exporttargetwindow" => "_self", "exportformat" => "PDF" ); // Stores server notices if any as string [ to be send back to chart after save ] $notices = "" ; // ============================================================================= // == processing == // ============================================================================= /** * Retrieve export data from POST Request sent by chart * Parse the Request stream into export data readable by this script * * Store export data into an array containing keys 'stream' (contains encoded * image data) ; 'meta' ( contains an array with 'width', 'height' and 'bgColor' keys) ;