abcpdf HttpAdditionalHeaders cookies [英] abcpdf HttpAdditionalHeaders cookies

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本文介绍了abcpdf HttpAdditionalHeaders cookies的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

您好我在使用abcpdf生成pdf文件时尝试将Cookie添加到http标头中。到目前为止我所做的是基于文档：

Hi I'm trying to add cookies to the http headers when generating a pdf file with abcpdf. What I have done so far is based on the documentation:

http://www.websupergoo.com/helppdf9net/default.htm?page=source%2F5-abcpdf%2Fxhtmloptions%2F2- properties％2Fhttpadditionalheaders.htm

当我的浏览器请求将页面转换为PDF时，标题是：

When requesting the page to be converted to PDF from my browser the headers are:

Connection: keep-alive
Accept: text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01
Accept-Encoding: gzip, deflate
Accept-Language: en-ie
Cookie: __utma=111872281.2030591713.1334325919.1348754241.1349943306.47; __utmz=111872281.1334325919.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); CurrentClient=AMF; UserHasMultipleClients=False; favFunds=%5B%7B%22id%22%3A57%2C%22alias_id%22%3A1690%7D%2C%7B%22id%22%3A794%2C%22alias_id%22%3Anull%7D%2C%7B%22id%22%3A818%2C%22alias_id%22%3Anull%7D%2C%7B%22id%22%3A21%2C%22alias_id%22%3Anull%7D%5D; favComparisons=%5B%7B%22selectedFunds%22%3A%5B%7B%22id%22%3A%22794%22%2C%22alias%22%3A%22null%22%7D%2C%7B%22id%22%3A%2217%22%2C%22alias%22%3A%22null%22%7D%2C%7B%22id%22%3A%22593%22%2C%22alias%22%3A%22old%22%7D%2C%7B%22id%22%3A%22593%22%2C%22alias%22%3A%221606%22%7D%5D%2C%22selectedIndexes%22%3A%5B%7B%22id%22%3A%2224002259%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22timePeriosSelection%22%3A%7B%22dateOne%22%3A%2223-11-2011%22%2C%22dateTwo%22%3A%2223-11-2012%22%7D%2C%22defaultTimePeriodSelection%22%3A%7B%22OneYear%22%3Atrue%2C%22ThreeYears%22%3Afalse%2C%22FiveYears%22%3Afalse%7D%7D%2C%7B%22selectedFunds%22%3A%5B%7B%22id%22%3A%22774%22%2C%22alias%22%3A%22null%22%7D%2C%7B%22id%22%3A%22215%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22selectedIndexes%22%3A%5B%7B%22id%22%3A%2224002259%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22timePeriosSelection%22%3A%7B%22dateOne%22%3A%2223-11-2011%22%2C%22dateTwo%22%3A%2223-11-2012%22%7D%2C%22defaultTimePeriodSelection%22%3A%7B%22OneYear%22%3Atrue%2C%22ThreeYears%22%3Afalse%2C%22FiveYears%22%3Afalse%7D%7D%2C%7B%22selectedFunds%22%3A%5B%7B%22id%22%3A%22215%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22selectedIndexes%22%3A%5B%7B%22id%22%3A%2224002259%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22timePeriosSelection%22%3A%7B%22dateOne%22%3A%2223-11-2011%22%2C%22dateTwo%22%3A%2223-11-2012%22%7D%2C%22defaultTimePeriodSelection%22%3A%7B%22OneYear%22%3Atrue%2C%22ThreeYears%22%3Afalse%2C%22FiveYears%22%3Afalse%7D%7D%5D
Host: localhost:63706
Referer: http://localhost:63706/
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0.1
X-Requested-With: XMLHttpRequest

当请求来自abcpdf时，标题为：

When the request comes from abcpdf the headers by are:

Connection: keep-alive
Keep-Alive: 115
Accept: text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01
Accept-Charset: ISO-8859-1, utf-8; q=0.7, *; q=0.7
Accept-Encoding: gzip, deflate
Accept-Language: en-us, en; q=0.5
Host: localhost:63706
Referer: http://localhost:63706/
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:2.0.1) Gecko/ /2.0.1
X-Requested-With: XMLHttpRequest

正如你所看到的那样错过了饼干。所以我手动将以下内容添加到标题中（abcpdf发送请求之前的theDoc.HtmlOptions.HttpAdditionalHeaders值）

As you can see it is missing the cookies. So I manually aded the following to the headers(theDoc.HtmlOptions.HttpAdditionalHeaders value before abcpdf send request)

Cookie: __utma=111872281.2030591713.1334325919.1348754241.1349943306.47; __utmz=111872281.1334325919.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); CurrentClient=AMF; UserHasMultipleClients=False; favFunds=%5B%7B%22id%22%3A57%2C%22alias_id%22%3A1690%7D%2C%7B%22id%22%3A794%2C%22alias_id%22%3Anull%7D%2C%7B%22id%22%3A818%2C%22alias_id%22%3Anull%7D%2C%7B%22id%22%3A21%2C%22alias_id%22%3Anull%7D%5D; favComparisons=%5B%7B%22selectedFunds%22%3A%5B%7B%22id%22%3A%22794%22%2C%22alias%22%3A%22null%22%7D%2C%7B%22id%22%3A%2217%22%2C%22alias%22%3A%22null%22%7D%2C%7B%22id%22%3A%22593%22%2C%22alias%22%3A%22old%22%7D%2C%7B%22id%22%3A%22593%22%2C%22alias%22%3A%221606%22%7D%5D%2C%22selectedIndexes%22%3A%5B%7B%22id%22%3A%2224002259%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22timePeriosSelection%22%3A%7B%22dateOne%22%3A%2223-11-2011%22%2C%22dateTwo%22%3A%2223-11-2012%22%7D%2C%22defaultTimePeriodSelection%22%3A%7B%22OneYear%22%3Atrue%2C%22ThreeYears%22%3Afalse%2C%22FiveYears%22%3Afalse%7D%7D%2C%7B%22selectedFunds%22%3A%5B%7B%22id%22%3A%22774%22%2C%22alias%22%3A%22null%22%7D%2C%7B%22id%22%3A%22215%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22selectedIndexes%22%3A%5B%7B%22id%22%3A%2224002259%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22timePeriosSelection%22%3A%7B%22dateOne%22%3A%2223-11-2011%22%2C%22dateTwo%22%3A%2223-11-2012%22%7D%2C%22defaultTimePeriodSelection%22%3A%7B%22OneYear%22%3Atrue%2C%22ThreeYears%22%3Afalse%2C%22FiveYears%22%3Afalse%7D%7D%2C%7B%22selectedFunds%22%3A%5B%7B%22id%22%3A%22215%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22selectedIndexes%22%3A%5B%7B%22id%22%3A%2224002259%22%2C%22alias%22%3A%22null%22%7D%5D%2C%22timePeriosSelection%22%3A%7B%22dateOne%22%3A%2223-11-2011%22%2C%22dateTwo%22%3A%2223-11-2012%22%7D%2C%22defaultTimePeriodSelection%22%3A%7B%22OneYear%22%3Atrue%2C%22ThreeYears%22%3Afalse%2C%22FiveYears%22%3Afalse%7D%7D%5D

这是完整的代码：

public MemoryStream HtmlToPdf(Uri pdfUrl, HttpCookieCollection cookies, bool landscape)
{
    var pdfStream = new MemoryStream();
    var theDoc = new Doc();
    if (landscape)
    {
        // apply a rotation transform
        double w = theDoc.MediaBox.Width;
        double h = theDoc.MediaBox.Height;
        double l = theDoc.MediaBox.Left;
        double b = theDoc.MediaBox.Bottom;
        theDoc.Transform.Rotate(90, l, b);
        theDoc.Transform.Translate(w, 0);
        // rotate our rectangle
        theDoc.Rect.Width = h;
        theDoc.Rect.Height = w;
    }

    theDoc.HtmlOptions.Engine = EngineType.Gecko;
    theDoc.HtmlOptions.Timeout = 60000;
    theDoc.HtmlOptions.UseScript = true;
    theDoc.HtmlOptions.OnLoadScript = "(function(){window.ABCpdf_go = false; setTimeout(function(){window.ABCpdf_go = true;}, 1000);})();";
    var url = Uri.UnescapeDataString(pdfUrl.ToString());

    if (cookies.Count > 0)
    {
        //send copy of cookies from original request
        var additionalHeadersString = "Cookie: ";
        foreach (var key in cookies.AllKeys)
        {
            if (!cookies.AllKeys[0].Equals(key)) //is NOT first element in cookie collection
            {
                additionalHeadersString += "; ";
            }
            additionalHeadersString += key + "=" + cookies[key].Value;
        }
        additionalHeadersString += "\r\n";
        theDoc.HtmlOptions.HttpAdditionalHeaders = additionalHeadersString;
        theDoc.HtmlOptions.NoCookie = true;
        theDoc.HtmlOptions.HostWebBrowser = false;
    }

    //send request
    var pageRef = theDoc.AddImageUrl(url, true, 1200, false);
    while (theDoc.Chainable(pageRef))
    {
        theDoc.Page = theDoc.AddPage();
        pageRef = theDoc.AddImageToChain(pageRef);
    }
    for (var i = 1; i <= theDoc.PageCount; i++)
    {
        theDoc.PageNumber = i;
        theDoc.Flatten();
    }

    theDoc.Save(pdfStream);
    theDoc.Clear();
    var byteInfo = pdfStream.ToArray();
    pdfStream.Write(byteInfo, 0, byteInfo.Length);
    pdfStream.Position = 0;
    return pdfStream;
}

问题是在使用HttpAdditionalHeaders属性后，标头中仍然缺少cookie ，你知道我错过了吗？

The problem is that the cookies still missing from the header after using the HttpAdditionalHeaders property, do you know what I'm missing?

提前致谢：）

推荐答案

这里的解决方案以及它为什么不起作用：

Here the solution and why it didn't work:

为什么它不起作用？

当使用Gecko作为渲染引擎时，AbcPdf不支持 theDoc.HtmlOptions.HttpAdditionalHeaders 。

AbcPdf does NOT support theDoc.HtmlOptions.HttpAdditionalHeaders when using Gecko as rendering engine.

工作周期

在给定网址的情况下生成PDF的操作：

Action that will generate PDF given an URL:

public class PdfController : Controller
{
    private readonly IPdfGenerator _pdfGenerator;

    public PdfController(IPdfGenerator pdfGenerator)
    {
        if (pdfGenerator == null)
            throw new ArgumentNullException();
        this._pdfGenerator = pdfGenerator;
    }

    public FileStreamResult Index(string url)
    {
        Response.AppendHeader("Content-Disposition", "attachment;filename=Download.Pdf");
        this._pdfGenerator.SetCookies(Request.Cookies);
        return new FileStreamResult(_pdfGenerator.HtmlToPdf(url.Uri, false, 1200), "application/pdf");
    }
}

PDF生成类：

    public class AbcPdfGenerator : IPdfGenerator
    {
        private static HttpCookieCollection _cookies = new HttpCookieCollection();

        public void SetCookies(HttpCookieCollection cookies)
        {
            lock (_cookies)
            {
                _cookies = cookies;
                System.Threading.Thread.MemoryBarrier();
            }
        }

        public HttpCookieCollection GetCookies()
        {
            return _cookies;
        }

        public MemoryStream HtmlToPdf(Uri pdfUrl, bool landscape, int screenResolutionWidth, bool enableCache)
        {
            var pdfStream = new MemoryStream();
            var theDoc = new Doc();
            if (landscape)
            {
                // apply a rotation transform
                double w = theDoc.MediaBox.Width;
                double h = theDoc.MediaBox.Height;
                double l = theDoc.MediaBox.Left;
                double b = theDoc.MediaBox.Bottom;
                theDoc.Transform.Rotate(90, l, b);
                theDoc.Transform.Translate(w, 0);
                // rotate our rectangle
                theDoc.Rect.Width = h;
                theDoc.Rect.Height = w;
            }
            theDoc.HtmlOptions.Engine = EngineType.Gecko;
            theDoc.HtmlOptions.Timeout = 60000;
            theDoc.HtmlOptions.UseScript = true;
            theDoc.HtmlOptions.OnLoadScript = "(function(){window.ABCpdf_go = false; setTimeout(function(){window.ABCpdf_go = true;}, 3000);})();";
            var url = Uri.UnescapeDataString(pdfUrl.ToString());

            var pageRef = theDoc.AddImageUrl(url, true, screenResolutionWidth, enableCache);
            while (theDoc.Chainable(pageRef))
            {
                theDoc.Page = theDoc.AddPage();
                pageRef = theDoc.AddImageToChain(pageRef);
            }
            for (var i = 1; i <= theDoc.PageCount; i++)
            {
                theDoc.PageNumber = i;
                theDoc.Flatten();
            }

            theDoc.Save(pdfStream);
            theDoc.Clear();
            var byteInfo = pdfStream.ToArray();
            pdfStream.Write(byteInfo, 0, byteInfo.Length);
            pdfStream.Position = 0;
            return pdfStream;
        }

        /// <summary>
        /// Will install the pdf software license on the server, this should be called on a Application_Start()
        /// </summary>
        public void InitializeService()
        {
            XSettings.InstallLicense(System.Configuration.ConfigurationManager.AppSettings["PdfGeneratorLicenseKey"]);
            //XSettings.InstallTrialLicense(System.Configuration.ConfigurationManager.AppSettings["PdfGeneratorLicenseKey"]);
        }
    }

返回要转换为PDF的HTML的操作：

Action that return HTML to be converted to PDF:

[RequireCookiesForPdf]
public ActionResult Index(string layout)
{
    return View();
}

之前使用的动作过滤器：

The action filter used before:

public class RequireCookiesForPdf : ActionFilterAttribute
{
    private readonly IPdfGenerator _pdfGenerator;

    public RequireCookiesForPdf()
    {
        //"Bastard injection" :( as action filters don't allow constructor injection
        this._pdfGenerator = DependencyResolver.Current.GetService<IPdfGenerator>();
    }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var cookies = this._pdfGenerator.GetCookies();
        if (cookies != null)
        {
            foreach (var key in cookies.AllKeys)
            {
                var httpCookie = cookies[key];
                if (httpCookie != null) filterContext.HttpContext.Response.Cookies.Set(new HttpCookie(key, httpCookie.Value));
            }
            this._pdfGenerator.SetCookies(new HttpCookieCollection());
        }
        base.OnActionExecuting(filterContext);
    }
}

这篇关于abcpdf HttpAdditionalHeaders cookies的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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