WPS本地镜像化在线文档操作以及样例

一个客户项目有引进在线文档操作需求，让我这边做一个demo调研下，给我的对接文档里有相关方法的说明，照着对接即可。但在真正对接过程中还是踩过不少坑，这儿对之前的对接工作做个记录。
按照习惯先来一个效果：

 Demo下载链接：https://download.csdn.net/download/qxyywy/88117444

接入指引

1. 申请授权证书并进行授权。
2. 登录系统后台页面
3. 创建、获取应用信息 access_key （简称ak）、 secret_key （简称 sk ）。开发者在接口调用时，使用ak 、 sk 生成WPS-4签名进行鉴权。
4. 在线编辑、在线预览、格式转换接入按照对应开放能力文档接入。在线编辑、在线预览对接过程中需要设置回调地址。其中，在线编辑可通过配置开启历史版本功能。
5. 使用过程中需通过证书查询接口关注授权证书状态，若证书即将过期或者不可用，需进行更新证书操作。
6. 在线编辑或在线预览服务端对接完毕，对接方可使用JSSDK，调用API实现相关需求。

WPS-4签名算法

在对接时，耗费了一定时间在WPS-4签名处，对接文档中有WPS-4的说明和样例，自己在对接转换成NetCore的时候踩了一些坑，签名算法中最主要是：Wps-Docs-Authorization的计算方法
签名格式：WPS-4 {accessKey}:{signature}  注意WPS-4后面有空格。
signature:hmac-sha256(secret_key, Ver + HttpMethod + URI + Content-Type + WpsDocs-Date + sha256(HttpBody))
signature的样例如下：WPS-4POST/callback/path/demoapplication/jsonWed, 20 Apr 2022 01:33:07GMTfc005f51a6e75586d2d5d078b657dxxxdf9c1dfa6a7c0c0ba38c715daeb6ede9

这是文档中对签名算法的解释，对照着格式完成相关算法，具体算法如下：
signature的组装：

        /// <summary>
        /// 获取签名
        /// </summary>
        /// <param name="method">请求方法，如：GET,POST</param>
        /// <param name="uri">请求url，带querystring</param>
        /// <param name="body">请求body</param>
        /// <param name="date">日期</param>
        /// <param name="contentType">默认：application/json</param>
        /// <param name="secretKey">应用SK</param>
        /// <returns></returns>
        public static string WPS4Signature(string secretKey,string method,string uri, byte[] body=null,DateTime? date=null,string contentType= "application/json")
        {
            //获取uri路径
            string path = uri;
            //日期格式化
            if (date == null)
                date = DateTime.Now;
            string dateStr = String.Format("{0:r}", date);
            //open不参与签名，做替换处理
            if (path.StartsWith("/open"))
            {
                path = path.Replace("/open", "");
            }

            string sha256body;
            //body为空则为空，否则返回sha256(body)
            if (body != null && body.Length > 0)
            {
                sha256body = Sha256(body);
            }
            else
            {
                sha256body = "";
            }
            String signature = null;
            signature = HmacSHA256Encrypt($"WPS-4{method.ToUpper()}{path}{contentType}{dateStr}{sha256body}", secretKey);

            return signature;
        }

HmacSHA256加密算法：

        /// <summary>
        /// HmacSHA256加密
        /// </summary>
        /// <param name="secret"></param>
        /// <param name="signKey"></param>
        /// <returns></returns>
        public static string HmacSHA256Encrypt(string secret, string signKey)
        {
            string signRet = string.Empty;
            using (HMACSHA256 mac = new HMACSHA256(Encoding.UTF8.GetBytes(signKey)))
            {
                byte[] hash = mac.ComputeHash(Encoding.UTF8.GetBytes(secret));
                //signRet = Convert.ToBase64String(hash);
                signRet = ToHexStrFromByte(hash); 
            }
            return signRet;
        }

Sha256转换：

        /// <summary>
        /// Sha256转换
        /// </summary>
        /// <param name="input">The input.</param>
        /// <returns>A hash.</returns>
        public static string Sha256(this byte[] input)
        {
            if (input == null)
            {
                return null;
            }
            using (var sha = SHA256.Create())
            {
                var hash = sha.ComputeHash(input);
                return ToHexStrFromByte(hash);
            }
        }

字节数组转16进制字符串：

        /// <summary>
        /// 字节数组转16进制字符串：空格分隔
        /// </summary>
        /// <param name="byteDatas"></param>
        /// <returns></returns>
        public static string ToHexStrFromByte(this byte[] byteDatas)
        {
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < byteDatas.Length; i++)
            {
                builder.Append(string.Format("{0:X2}", byteDatas[i]));
            }
            return builder.ToString().Trim().ToLower();
        }

获取在线预览链接

        /// <summary>
        /// 获取在线预览链接
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        [Route("api/wps/previewgenarate")]
        [HttpPost]
        public Task<GenarateResult> GenarateWPSPreviewUrl(GenarateRequest request)
        {
            return Task.Run(() =>
            {
                string wpsHost = "http://10.4.**.**";
                string uri = $"/api/preview/v1/files/{defaultFileId}/link?type=w&preview_mode=high_definition";
                string fullUrl = $"{wpsHost}/open{uri}";
                Dictionary<string, string> headers = new Dictionary<string, string>();
                DateTime now = DateTime.Now;
                headers.Add("Content-Type", "application/json");
                headers.Add("Wps-Docs-Date", String.Format("{0:r}", now));
                var signature = WPSLocalSIgnatureHelper.WPS4Signature("SKrpaxjdwoetijjv", "get", uri, null, now);
                string docsAuthorization = WPSLocalSIgnatureHelper.WPS4SignAuthorization("UOMYPEVAHWQLTKJF", signature);
                headers.Add("Wps-Docs-Authorization", docsAuthorization);
                HttpHelper httpHelper = new HttpHelper();
                var resultTemp = httpHelper.Get(fullUrl, headers);
                var result = JsonConvert.DeserializeObject<ResponseBaseModel<OnlineEditResultModel>>(resultTemp);
                string url = "";
                if (result != null && result.data != null)
                {
                    url = result.data.link;
                }
                return new GenarateResult { Url = url };
            });
        }

这儿比较坑的地方来了,方法参数都组装好了，通过HttpWebRequest后端发起请求获取WPS中台返回的在线预览地址时，始终提示401报错获取不到数据。迫不得已自己通过APIPost组装了相关请求和参数居然又能获取到相关数据。对照了下请求头，又差异后调整了程序的请求头，保证和apiPost里的完全一致，依然返回401，通过查阅相关资料找到一个处理办法，在发起的请求后手动捕获WebException，然后在WebException里解析数据流获取信息。
HttpWebRequest Get方式访问
 

        /// <summary>
        ///  Get方式访问
        /// </summary>
        /// <param name="url"></param>
        /// <param name="encode"></param>
        /// <param name="referer"></param>
        /// <param name="headers"></param>
        /// <returns></returns>
        public string Get(string url, string encode, string referer, Dictionary<string, string> headers=null)
        {
            int num = _tryTimes;
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            StreamReader reader = null;
            while (num-- >= 0)
            {
                try
                {
                    DelaySomeTime();
                    ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);//验证服务器证书回调自动验证
                    request = (HttpWebRequest)WebRequest.Create(url);
                    request.Headers.Add("accept", "*/*");
                    request.Headers.Add("accept-encoding", "gzip, deflate, br");
                    request.Headers.Add("accept-language", "zh-CN");
                    request.Headers.Add("connection", "keep-alive");
                    
                    if (headers != null) 
                    {
                        foreach (var item in headers)
                        {
                            request.Headers.Add(item.Key, item.Value);
                        }
                    }
                    //request.UserAgent = reqUserAgent;
                    request.CookieContainer = _cookie;
                    request.Referer = referer;
                    request.Method = "GET";
                    request.Timeout = _timeOut;
                    if (_proxy != null && _proxy.Credentials != null)
                    {
                        request.UseDefaultCredentials = true;
                    }
                    request.Proxy = _proxy;
                    response = (HttpWebResponse)request.GetResponse();
                    reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encode));
                    return reader.ReadToEnd();
                }
                catch (WebException ex)
                {
                    response = (HttpWebResponse)ex.Response; //解析401等错误返回的有效信息
                    var resultTemp = "";
                    Stream stream = response.GetResponseStream();
                    using (StreamReader readers = new StreamReader(stream, Encoding.UTF8))
                    {
                        resultTemp = readers.ReadToEnd();
                    }
                    return resultTemp;
                }
                catch (Exception ex)
                {
                    _logger.Error(url + "\r\n" + ex.ToString());
                    continue;
                }
                finally
                {
                    if (request != null)
                    {
                        request.Abort();
                    }
                    if (response != null)
                    {
                        response.Close();
                    }
                    if (reader != null)
                    {
                        reader.Close();
                    }
                }
            }
            return string.Empty;
        }

DemoHtml

到上面时后端的处理就基本完成，前端这边因为时临时demo就用了一个html来处理，真实项目中需要用VUE等处理也都类似。
以下为 html的代码：

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
        <!-- 建议禁用外框浏览器自带的缩放 -->
        <meta
            name="viewport"
            content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0,user-scalable=no"
        />
        <meta http-equiv="X-UA-Compatible" content="ie=edge" />
        <title>WPS Web Office(iframe)接入指南</title>
        <style>
            * {
                box-sizing: border-box;
            }

            html,
            body {
                display: flex;
                flex-direction: column;
                padding: 0;
                margin: 0;
                height: 100%;
                /* 防止双击缩放 */
                touch-action: manipulation;
            }

            iframe {
                flex: 1;
            }
        </style>
        <!-- cdn引入JQ -->
        <script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.4.1.min.js"></script>
        <script src="./jwps.js"></script>
        <script type="text/javascript">
            var appHost = "http://10.4.146.19:8890";
            // 支持 HTTPS
            // 注意：如果通过postMessage来设置token，请在url参数加上_w_tokentype=1
            function showWPS(url) {
                // 初始化
                var wps = WPS.config({
                    mount: document.querySelector("#wpsPanl"),
                    // 文字
                    wpsUrl: url,
                    headers: {
                        shareBtn: {
                            tooltip: "分享",
                            subscribe: function() {
                                console.log("click callback");
                            }
                        },
                        otherMenuBtn: {
                            tooltip: "其他按钮",
                            items: [
                                {
                                    // 自定义, type 固定填 'custom'
                                    type: "custom",
                                    icon:
                                        "http://ep.wps.cn/index/images/logo_white2.png",
                                    text: "API 导出 PDF",
                                    subscribe: function(wps) {
                                        if (wps.WpsApplication) {
                                            wps.WpsApplication()
                                                .ActiveDocument.ExportAsFixedFormatAsync()
                                                .then(function(result) {
                                                    console.table(result);
                                                });
                                        }
                                    }
                                },
                                {
                                    // 自定义, type 固定填 'custom'
                                    type: "custom",
                                    icon:
                                        "http://ep.wps.cn/index/images/logo_white2.png",
                                    text: "API 使用",
                                    subscribe: function(wps) {
                                        let result;
                                        if (wps.WpsApplication) {
                                            wps.WpsApplication()
                                                .ActiveDocument.ExportAsFixedFormatAsync()
                                                .then(function(result) {
                                                    console.table(result);
                                                });
                                        }
                                    }
                                }
                            ]
                        }
                    }
                });
                return wps;
            }

            window.onload = function() {
                 $.ajax({
                    url: appHost+"/api/wps/previewgenarate",
                    contentType: "application/json",
                    dataType: "json",
                    data: JSON.stringify({
                        fileId: 'a123',
                        fileName: "test.docx",
                        fileType: 1,
                        userId: 1505340867
                    }),
                    type: "post",
                    success: function(res) {
                        var wpsUrl = res.url;
                        console.log(wpsUrl);
                        var wps = showWPS(wpsUrl);
                    }
                 });

                var fileInput = document.getElementById("bookimg1");
                //选择文件
                fileInput.addEventListener('change', function () {
                    //如果未传入文件则中断
                    if (fileInput.files[0] == undefined) {
                        return;
                    }

                    var file = fileInput.files[0];

                    //FileReader可直接将上传文件转化为二进制流
                    var reader = new FileReader();
                    reader.readAsDataURL(file);//转化二进制流，异步方法
                    reader.onload = function (result) {//完成后this.result为二进制流
                        var base64Str = this.result;
                        $('#uploadImg').attr('src', base64Str);
                        $('#imgPreview').show();
                    } 
                })
            };
            function replaceWps() {
                $('.tdname1').html($('#name1').val());
                $('.tddept1').html($('#dept1').val());
                $('.tdage1').html($('#age1').val());
                $('.tdname2').html($('#name2').val());
                $('.tddept2').html($('#dept2').val());
                $('.tdage2').html($('#age2').val());
                var fileBytes = "";
                var fileName = "";
                if ($('#bookimg1')[0].files[0] != undefined) {
                    var imgFile = $('#bookimg1')[0].files[0];
                    fileName = imgFile.name;
                    //FileReader可直接将上传文件转化为二进制流
                    var reader = new FileReader();
                    reader.readAsDataURL(imgFile);//转化二进制流，异步方法
                    reader.onload = function (result) {//完成后this.result为二进制流
                        var base64Str = this.result;
                        var startNum = base64Str.indexOf("base64,");
                        startNum = startNum * 1 + 7;
                        //去除前部格式信息（如果有需求）
                        var baseStr = base64Str.slice(startNum);
                        fileBytes = baseStr;

                        $.ajax({
                            url: appHost + "/api/wps/wrapheader",
                            contentType: "application/json",
                            dataType: "json",
                            data: JSON.stringify({
                                sample_list: [
                                    {
                                        bookmark: 'bookmark1',
                                        type: 'TEXT',
                                        text: $('#bookmark1').val()
                                    },
                                    {
                                        bookmark: 'bookmark2',
                                        type: 'TEXT',
                                        text: $('#bookmark2').val()
                                    },
                                    {
                                        bookmark: 'bookmark3',
                                        type: 'TEXT',
                                        text: $('#bookmark3').val()
                                    },
                                    {
                                        bookmark: 'bookimg1',
                                        type: 'IMAGE',
                                        /*sample_url:$('#bookimg1').val(),*/
                                        sample_filename: fileName,
                                        text: fileBytes,
                                    },
                                    {
                                        bookmark: 'bookform1',
                                        type: 'TEXT',
                                        text: $('#testForm').prop("outerHTML")
                                    }
                                ],
                            }),
                            type: "post",
                            success: function (res) {
                                var wpsUrl = res.url;;
                                var wps = showWPS(wpsUrl);
                            }
                        });
                    }
                } else {
                    $.ajax({
                        url: "http://10.4.146.19:8890/api/wps/wrapheader",
                        contentType: "application/json",
                        dataType: "json",
                        data: JSON.stringify({
                            sample_list: [
                                {
                                    bookmark: 'bookmark1',
                                    type: 'TEXT',
                                    text: $('#bookmark1').val()
                                },
                                {
                                    bookmark: 'bookmark2',
                                    type: 'TEXT',
                                    text: $('#bookmark2').val()
                                },
                                {
                                    bookmark: 'bookmark3',
                                    type: 'TEXT',
                                    text: $('#bookmark3').val()
                                },
                                {
                                    bookmark: 'bookform1',
                                    type: 'TEXT',
                                    text: $('#testForm').prop("outerHTML")
                                }
                            ],
                        }),
                        type: "post",
                        success: function (res) {
                            var wpsUrl = res.url;;
                            var wps = showWPS(wpsUrl);
                        }
                    });
                }

				
			}
        </script>
    </head>
    <body>
		<div style="width:100%;height:700px;">
			<div id="wpsPanl" style="width:65%;float:left;height:100%;"></div>
            <div id="form" style="width:34%;float:left;height:100%;padding-top:50px;padding-left: 20px;">
                <div><div class="title">课题名称：</div><input class="input" type="text" id="bookmark1" placeholder="请填写课题名称"></div>
                <dl style="clear:both;"></dl>
                <div><div class="title">课题申报单位：</div><input class="input" type="text" id="bookmark2" placeholder="请填写课题申报单位"></div>
                <dl style="clear:both;"></dl>
                <div><div class="title">课题负责人：</div><input class="input" type="text" id="bookmark3" placeholder="请填写课题负责人"></div>
                <dl style="clear:both;"></dl>
                <div style="height:140px">
                    <div class="title">课题成员：</div>
                    <table>
                        <thead><tr><td>姓名</td><td>所属部门</td><td>年龄</td></tr></thead>
                        <tr><td><input class="forminput" type="text" id="name1" placeholder="请填写姓名"></td><td><input class="forminput" type="text" id="dept1" placeholder="请填写所属部门"></td><td><input class="forminput" type="text" id="age1" placeholder="请填写年龄"></td></tr>
                        <tr><td><input class="forminput" type="text" id="name2" placeholder="请填写姓名"></td><td><input class="forminput" type="text" id="dept2" placeholder="请填写所属部门"></td><td><input class="forminput" type="text" id="age2" placeholder="请填写年龄"></td></tr>
                    </table>
                    <div style="width:100%;display:none;">
                        <table border="1" cellspacing="0" style="width:90%;" id="testForm">
                            <thead><tr><td>姓名</td><td>所属部门</td><td>年龄</td></tr></thead>
                            <tr><td class="tdname1"></td><td class="tddept1"></td><td class="tdage1"></td></tr>
                            <tr><td class="tdname2"></td><td class="tddept2"></td><td class="tdage2"></td></tr>
                        </table>
                    </div>
                </div>
                <dl style="clear:both;"></dl>
                <div style="height:20px;margin:0;"><div class="title"></div><span style="color:red">表格替换在第6页</span></div>
                <dl style="clear:both;"></dl>
                <div><div class="title">图片上传：</div><input style="padding:8px 0;" type="file" id="bookimg1"></div>
                <div style="display:none;" id="imgPreview"><img src="" id="uploadImg" width="100" /></div>
                <dl style="clear:both;"></dl>
                <div style="height:20px;margin:0;"><div class="title"></div><span style="color:red">图片替换在第7页</span></div>
                <dl style="clear:both;"></dl>
                <div style="text-align:center;">
                    <input style="
    margin: 0 150px;
    height: 40px;
    background: rgba(2,128,204,1);
    border-radius: 2px;
    display: block;
    width: 80px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: rgba(255,255,255,1);
    " type="button" value="替换" onclick="replaceWps()" id="submit">
                </div>
            </div>
		<div>
	</body>
	<style>
		#wpsPanl iframe{width:99%;height:850px;}
		#form div{
			margin: 10px 0;
			height: 40px;
			color: rgba(51,51,51,1);
			float: left;
		}
		#form div .input{
			height: 35px;
			margin: 2px 0;
			width: 358px;
			border: solid 1px rgba(193,193,193,.35);
		}
        #form div .forminput {
            height: 35px;
            margin: 2px 0;
            width: 94px;
            border: solid 1px rgba(193,193,193,.35);
        }
		#form div .title{width:120px;text-align: right;}
        td {
            border: 1px solid rgba(193,193,193,.35);
            padding: 8px 12px;
        }
        tr {
            background-color: inherit;
            font-size: 14px;
            border-top: 1px solid var(--vp-c-divider);
            transition: background-color .5s;
        }
        table {
            /*width: 100%;*/
            display: table;
            border-collapse: collapse;
            /*margin: 20px 0;*/
            overflow-x: auto;
        }
        table thead {
            font-weight: bold;
        }
	</style>
</html>

个人总结：需要在线编辑等相关操作，其实也可以用免费的组件组合，比如可以用onlyoffice+Aspose.Words去操作，仅个人见解。文章来源地址https://www.toymoban.com/news/detail-613975.html

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