摘要：今天需要處理文件上傳到服務器，并讀取文件內容，保存到庫中。一文件上傳頁面文件上傳處理文件輸入這里是塊級幫助文本的實例。提交二文件處理頁面獲取文件資源請選擇要上傳的文件以只讀的方式打開文件打開文件資源失敗函數設置地區信息地域信息。

今天需要處理CSV文件上傳到服務器，并讀取CSV文件內容，保存到庫中。

upload.html

    
    
    
    
    





    

        文件輸入
        
        
這里是塊級幫助文本的實例。
    
    提交

file_handle.php

 $v)
    {
        $tmp_row[$v] = trim(iconv("gbk","utf-8", ltrim($data[$k], "`")));
    }

    $csv_arr[] = $tmp_row;
}

// 關閉資源
fclose($handle);

print_r($csv_arr);
// TODO::判斷數據是否讀取到，然后入庫

這里我們使用 ajax 異步上傳插件 ajaxupload.js，來進行異步上傳。

ajaxupload.js

/**
 * AJAX Upload ( http://valums.com/ajax-upload/ ) 
 * Copyright (c) Andris Valums
 * Licensed under the MIT license ( http://valums.com/mit-license/ )
 * Thanks to Gary Haran, David Mark, Corey Burns and others for contributions 
 */
(function () {
    /* global window */
    /* jslint browser: true, devel: true, undef: true, nomen: true, bitwise: true, regexp: true, newcap: true, immed: true */
    
    /**
     * Wrapper for FireBug"s console.log
     */
    function log(){
        if (typeof(console) != "undefined" && typeof(console.log) == "function"){            
            Array.prototype.unshift.call(arguments, "[Ajax Upload]");
            console.log( Array.prototype.join.call(arguments, " "));
        }
    } 

    /**
     * Attaches event to a dom element.
     * @param {Element} el
     * @param type event name
     * @param fn callback This refers to the passed element
     */
    function addEvent(el, type, fn){
        if (el.addEventListener) {
            el.addEventListener(type, fn, false);
        } else if (el.attachEvent) {
            el.attachEvent("on" + type, function(){
                fn.call(el);
            });
        } else {
            throw new Error("not supported or DOM not loaded");
        }
    }   
    
    /**
     * Attaches resize event to a window, limiting
     * number of event fired. Fires only when encounteres
     * delay of 100 after series of events.
     * 
     * Some browsers fire event multiple times when resizing
     * http://www.quirksmode.org/dom/events/resize.html
     * 
     * @param fn callback This refers to the passed element
     */
    function addResizeEvent(fn){
        var timeout;
               
        addEvent(window, "resize", function(){
            if (timeout){
                clearTimeout(timeout);
            }
            timeout = setTimeout(fn, 100);                        
        });
    }    
    
    // Needs more testing, will be rewriten for next version        
    // getOffset function copied from jQuery lib (http://jquery.com/)
    if (document.documentElement.getBoundingClientRect){
        // Get Offset using getBoundingClientRect
        // http://ejohn.org/blog/getboundingclientrect-is-awesome/
        var getOffset = function(el){
            var box = el.getBoundingClientRect();
            var doc = el.ownerDocument;
            var body = doc.body;
            var docElem = doc.documentElement; // for ie 
            var clientTop = docElem.clientTop || body.clientTop || 0;
            var clientLeft = docElem.clientLeft || body.clientLeft || 0;
             
            // In Internet Explorer 7 getBoundingClientRect property is treated as physical,
            // while others are logical. Make all logical, like in IE8.    
            var zoom = 1;            
            if (body.getBoundingClientRect) {
                var bound = body.getBoundingClientRect();
                zoom = (bound.right - bound.left) / body.clientWidth;
            }
            
            if (zoom > 1) {
                clientTop = 0;
                clientLeft = 0;
            }
            
            var top = box.top / zoom + (window.pageYOffset || docElem && docElem.scrollTop / zoom || body.scrollTop / zoom) - clientTop, left = box.left / zoom + (window.pageXOffset || docElem && docElem.scrollLeft / zoom || body.scrollLeft / zoom) - clientLeft;
            
            return {
                top: top,
                left: left
            };
        };        
    } else {
        // Get offset adding all offsets 
        var getOffset = function(el){
            var top = 0, left = 0;
            do {
                top += el.offsetTop || 0;
                left += el.offsetLeft || 0;
                el = el.offsetParent;
            } while (el);
            
            return {
                left: left,
                top: top
            };
        };
    }
    
    /**
     * Returns left, top, right and bottom properties describing the border-box,
     * in pixels, with the top-left relative to the body
     * @param {Element} el
     * @return {Object} Contains left, top, right,bottom
     */
    function getBox(el){
        var left, right, top, bottom;
        var offset = getOffset(el);
        left = offset.left;
        top = offset.top;
        
        right = left + el.offsetWidth;
        bottom = top + el.offsetHeight;
        
        return {
            left: left,
            right: right,
            top: top,
            bottom: bottom
        };
    }
    
    /**
     * Helper that takes object literal
     * and add all properties to element.style
     * @param {Element} el
     * @param {Object} styles
     */
    function addStyles(el, styles){
        for (var name in styles) {
            if (styles.hasOwnProperty(name)) {
                el.style[name] = styles[name];
            }
        }
    }
        
    /**
     * Function places an absolutely positioned
     * element on top of the specified element
     * copying position and dimentions.
     * @param {Element} from
     * @param {Element} to
     */    
    function copyLayout(from, to){
        var box = getBox(from);
        
        addStyles(to, {
            position: "absolute",                    
            left : box.left + "px",
            top : box.top + "px",
            width : from.offsetWidth + "px",
            height : from.offsetHeight + "px"
        });        
    }

    /**
    * Creates and returns element from html chunk
    * Uses innerHTML to create an element
    */
    var toElement = (function(){
        var div = document.createElement("div");
        return function(html){
            div.innerHTML = html;
            var el = div.firstChild;
            return div.removeChild(el);
        };
    })();
            
    /**
     * Function generates unique id
     * @return unique id 
     */
    var getUID = (function(){
        var id = 0;
        return function(){
            return "ValumsAjaxUpload" + id++;
        };
    })();        
 
    /**
     * Get file name from path
     * @param {String} file path to file
     * @return filename
     */  
    function fileFromPath(file){
        return file.replace(/.*(/|)/, "");
    }
    
    /**
     * Get file extension lowercase
     * @param {String} file name
     * @return file extenstion
     */    
    function getExt(file){
        return (-1 !== file.indexOf(".")) ? file.replace(/.*[.]/, "") : "";
    }

    function hasClass(el, name){        
        var re = new RegExp("" + name + "");        
        return re.test(el.className);
    }    
    function addClass(el, name){
        if ( ! hasClass(el, name)){   
            el.className += " " + name;
        }
    }    
    function removeClass(el, name){
        var re = new RegExp("" + name + "");                
        el.className = el.className.replace(re, "");        
    }
    
    function removeNode(el){
        el.parentNode.removeChild(el);
    }

    /**
     * Easy styling and uploading
     * @constructor
     * @param button An element you want convert to 
     * upload button. Tested dimentions up to 500x500px
     * @param {Object} options See defaults below.
     */
    window.AjaxUpload = function(button, options){
        this._settings = {
            // Location of the server-side upload script
            action: "upload.php",
            // File upload name
            name: "userfile",
            // Additional data to send
            data: {},
            // Submit file as soon as it"s selected
            autoSubmit: true,
            // The type of data that you"re expecting back from the server.
            // html and xml are detected automatically.
            // Only useful when you are using json data as a response.
            // Set to "json" in that case. 
            responseType: false,
            // Class applied to button when mouse is hovered
            hoverClass: "hover",
            // Class applied to button when AU is disabled
            disabledClass: "disabled",            
            // When user selects a file, useful with autoSubmit disabled
            // You can return false to cancel upload            
            onChange: function(file, extension){
            },
            // Callback to fire before file is uploaded
            // You can return false to cancel upload
            onSubmit: function(file, extension){
            },
            // Fired when file upload is completed
            // WARNING! DO NOT USE "FALSE" STRING AS A RESPONSE!
            onComplete: function(file, response){
            }
        };
                        
        // Merge the users options with our defaults
        for (var i in options) {
            if (options.hasOwnProperty(i)){
                this._settings[i] = options[i];
            }
        }
                
        // button isn"t necessary a dom element
        if (button.jquery){
            // jQuery object was passed
            button = button[0];
        } else if (typeof button == "string") {
            if (/^#.*/.test(button)){
                // If jQuery user passes #elementId don"t break it                    
                button = button.slice(1);                
            }
            
            button = document.getElementById(button);
        }
        
        if ( ! button || button.nodeType !== 1){
            throw new Error("Please make sure that you"re passing a valid element"); 
        }
                
        if ( button.nodeName.toUpperCase() == "A"){
            // disable link                       
            addEvent(button, "click", function(e){
                if (e && e.preventDefault){
                    e.preventDefault();
                } else if (window.event){
                    window.event.returnValue = false;
                }
            });
        }
                    
        // DOM element
        this._button = button;        
        // DOM element                 
        this._input = null;
        // If disabled clicking on button won"t do anything
        this._disabled = false;
        
        // if the button was disabled before refresh if will remain
        // disabled in FireFox, let"s fix it
        this.enable();        
        
        this._rerouteClicks();
    };
    
    // assigning methods to our class
    AjaxUpload.prototype = {
        setData: function(data){
            this._settings.data = data;
        },
        disable: function(){            
            addClass(this._button, this._settings.disabledClass);
            this._disabled = true;
            
            var nodeName = this._button.nodeName.toUpperCase();            
            if (nodeName == "INPUT" || nodeName == "BUTTON"){
                this._button.setAttribute("disabled", "disabled");
            }            
            
            // hide input
            if (this._input){
                // We use visibility instead of display to fix problem with Safari 4
                // The problem is that the value of input doesn"t change if it 
                // has display none when user selects a file           
                this._input.parentNode.style.visibility = "hidden";
            }
        },
        enable: function(){
            removeClass(this._button, this._settings.disabledClass);
            this._button.removeAttribute("disabled");
            this._disabled = false;
            
        },
        /**
         * Creates invisible file input 
         * that will hover above the button
         * 

         */
        _createInput: function(){ 
            var self = this;
                        
            var input = document.createElement("input");
            input.setAttribute("type", "file");
            input.setAttribute("name", this._settings.name);
            
            addStyles(input, {
                "position" : "absolute",
                // in Opera only "browse" button
                // is clickable and it is located at
                // the right side of the input
                "right" : 0,
                "margin" : 0,
                "padding" : 0,
                "fontSize" : "480px",                
                "cursor" : "pointer"
            });            

            var div = document.createElement("div");                        
            addStyles(div, {
                "display" : "block",
                "position" : "absolute",
                "overflow" : "hidden",
                "margin" : 0,
                "padding" : 0,                
                "opacity" : 0,
                // Make sure browse button is in the right side
                // in Internet Explorer
                "direction" : "ltr",
                //Max zIndex supported by Opera 9.0-9.2
                "zIndex": 2147483583
            });
            
            // Make sure that element opacity exists.
            // Otherwise use IE filter            
            if ( div.style.opacity !== "0") {
                if (typeof(div.filters) == "undefined"){
                    throw new Error("Opacity not supported by the browser");
                }
                div.style.filter = "alpha(opacity=0)";
            }            
            
            addEvent(input, "change", function(){
                 
                if ( ! input || input.value === ""){                
                    return;                
                }
                            
                // Get filename from input, required                
                // as some browsers have path instead of it          
                var file = fileFromPath(input.value);
                                
                if (false === self._settings.onChange.call(self, file, getExt(file))){
                    self._clearInput();                
                    return;
                }
                
                // Submit form when value is changed
                if (self._settings.autoSubmit) {
                    self.submit();
                }
            });            

            addEvent(input, "mouseover", function(){
                addClass(self._button, self._settings.hoverClass);
            });
            
            addEvent(input, "mouseout", function(){
                removeClass(self._button, self._settings.hoverClass);
                
                // We use visibility instead of display to fix problem with Safari 4
                // The problem is that the value of input doesn"t change if it 
                // has display none when user selects a file           
                input.parentNode.style.visibility = "hidden";

            });   
                        
            div.appendChild(input);
            document.body.appendChild(div);
              
            this._input = input;
        },
        _clearInput : function(){
            if (!this._input){
                return;
            }            
                             
            // this._input.value = ""; Doesn"t work in IE6                               
            removeNode(this._input.parentNode);
            this._input = null;                                                                   
            this._createInput();
            
            removeClass(this._button, this._settings.hoverClass);
        },
        /**
         * Function makes sure that when user clicks upload button,
         * the this._input is clicked instead
         */
        _rerouteClicks: function(){
            var self = this;
            
            // IE will later display "access denied" error
            // if you use using self._input.click()
            // other browsers just ignore click()

            addEvent(self._button, "mouseover", function(){
                if (self._disabled){
                    return;
                }
                                
                if ( ! self._input){
                    self._createInput();
                }
                
                var div = self._input.parentNode;                            
                copyLayout(self._button, div);
                div.style.visibility = "visible";
                                
            });
            
            
            // commented because we now hide input on mouseleave
            /**
             * When the window is resized the elements 
             * can be misaligned if button position depends
             * on window size
             */
            //addResizeEvent(function(){
            //    if (self._input){
            //        copyLayout(self._button, self._input.parentNode);
            //    }
            //});            
                                         
        },
        /**
         * Creates iframe with unique name
         * @return {Element} iframe
         */
        _createIframe: function(){
            // We can"t use getTime, because it sometimes return
            // same value in safari :(
            var id = getUID();            
             
            // We can"t use following code as the name attribute
            // won"t be properly registered in IE6, and new window
            // on form submit will open
            // var iframe = document.createElement("iframe");
            // iframe.setAttribute("name", id);                        
 
            var iframe = toElement("